🔖 Release version 0.55.0

* 📝 Add links to GitHub sponsors

* ✏ Update link to sponsors

.env

@@ -0,0 +1 @@
+PYTHONPATH=./docs_src

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: [tiangolo]

.github/ISSUE_TEMPLATE/question.md

@@ -21,4 +21,4 @@ Is it possible to [...]?
 
 ### Additional context
 
-Add any other context or screenshots about the feature request here.
+Add any other context or screenshots about the question here.

.github/workflows/deploy-docs.yml

@@ -0,0 +1,29 @@
+name: Build and Deploy to Netlify
+on:
+  push:
+  pull_request:
+    types: [opened, synchronize]
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: "3.7"
+      - name: Install Flit
+        run: python3.7 -m pip install flit
+      - name: Install docs extras
+        run: python3.7 -m flit install --extras doc
+      - name: Build Docs
+        run: python3.7 ./scripts/docs.py build-all
+      - name: Deploy to Netlify
+        uses: nwtgck/actions-netlify@v1.0.3
+        with:
+          publish-dir: './site'
+          production-branch: master
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+        env:
+          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}

.gitignore

@@ -13,3 +13,6 @@ coverage.xml
 test.db
 log.txt
 Pipfile.lock
+env3.*
+env
+docs_build

Pipfile

@@ -1,38 +0,0 @@
-[[source]]
-name = "pypi"
-url = "https://pypi.org/simple"
-verify_ssl = true
-
-[dev-packages]
-mypy = "*"
-black = "*"
-jupyter = "*"
-better-exceptions = "*"
-pytest = "*"
-pytest-cov = "*"
-isort = "*"
-requests = "*"
-flit = "*"
-mkdocs = "*"
-mkdocs-material = "*"
-markdown-include = "*"
-autoflake = "*"
-email-validator = "*"
-ujson = "*"
-flake8 = "*"
-python-multipart = "*"
-sqlalchemy = "*"
-uvicorn = "*"
-
-[packages]
-starlette = "==0.12.9"
-pydantic = "==1.0.0"
-databases = {extras = ["sqlite"],version = "*"}
-hypercorn = "*"
-orjson = "*"
-
-[requires]
-python_version = "3.6"
-
-[pipenv]
-allow_prereleases = true

README.md

@@ -9,7 +9,7 @@
     <img src="https://travis-ci.com/tiangolo/fastapi.svg?branch=master" alt="Build Status">
 </a>
 <a href="https://codecov.io/gh/tiangolo/fastapi" target="_blank">
-    <img src="https://codecov.io/gh/tiangolo/fastapi/branch/master/graph/badge.svg" alt="Coverage">
+    <img src="https://img.shields.io/codecov/c/github/tiangolo/fastapi" alt="Coverage">
 </a>
 <a href="https://pypi.org/project/fastapi" target="_blank">
     <img src="https://badge.fury.io/py/fastapi.svg" alt="Package version">
@@ -33,13 +33,13 @@ The key features are:
 
 * **Fast**: Very high performance, on par with **NodeJS** and **Go** (thanks to Starlette and Pydantic). [One of the fastest Python frameworks available](#performance).
 
-* **Fast to code**: Increase the speed to develop features by about 200% to 300% *.
+* **Fast to code**: Increase the speed to develop features by about 200% to 300%. *
 * **Fewer bugs**: Reduce about 40% of human (developer) induced errors. *
 * **Intuitive**: Great editor support. <abbr title="also known as auto-complete, autocompletion, IntelliSense">Completion</abbr> everywhere. Less time debugging.
 * **Easy**: Designed to be easy to use and learn. Less time reading docs.
 * **Short**: Minimize code duplication. Multiple features from each parameter declaration. Fewer bugs.
 * **Robust**: Get production-ready code. With automatic interactive documentation.
-* **Standards-based**: Based on (and fully compatible with) the open standards for APIs: <a href="https://github.com/OAI/OpenAPI-Specification" target="_blank">OpenAPI</a> (previously known as Swagger) and <a href="http://json-schema.org/" target="_blank">JSON Schema</a>.
+* **Standards-based**: Based on (and fully compatible with) the open standards for APIs: <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank">OpenAPI</a> (previously known as Swagger) and <a href="http://json-schema.org/" class="external-link" target="_blank">JSON Schema</a>.
 
 <small>* estimation based on tests on an internal development team, building production applications.</small>
 
@@ -77,28 +77,47 @@ The key features are:
 
 ---
 
+## **Typer**, the FastAPI of CLIs
+
+<a href="https://typer.tiangolo.com" target="_blank"><img src="https://typer.tiangolo.com/img/logo-margin/logo-margin-vector.svg" style="width: 20%;"></a>
+
+If you are building a <abbr title="Command Line Interface">CLI</abbr> app to be used in the terminal instead of a web API, check out <a href="https://typer.tiangolo.com/" class="external-link" target="_blank">**Typer**</a>.
+
+**Typer** is FastAPI's little sibling. And it's intended to be the **FastAPI of CLIs**. ⌨️ 🚀
+
 ## Requirements
 
 Python 3.6+
 
 FastAPI stands on the shoulders of giants:
 
-* <a href="https://www.starlette.io/" target="_blank">Starlette</a> for the web parts.
-* <a href="https://pydantic-docs.helpmanual.io/" target="_blank">Pydantic</a> for the data parts.
-
+* <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> for the web parts.
+* <a href="https://pydantic-docs.helpmanual.io/" class="external-link" target="_blank">Pydantic</a> for the data parts.
 
 ## Installation
 
-```bash
-pip install fastapi
+<div class="termy">
+
+```console
+$ pip install fastapi
+
+---> 100%
 ```
 
-You will also need an ASGI server, for production such as <a href="http://www.uvicorn.org" target="_blank">Uvicorn</a> or <a href="https://gitlab.com/pgjones/hypercorn" target="_blank">Hypercorn</a>.
+</div>
 
-```bash
-pip install uvicorn
+You will also need an ASGI server, for production such as <a href="http://www.uvicorn.org" class="external-link" target="_blank">Uvicorn</a> or <a href="https://gitlab.com/pgjones/hypercorn" class="external-link" target="_blank">Hypercorn</a>.
+
+<div class="termy">
+
+```console
+$ pip install uvicorn
+
+---> 100%
 ```
 
+</div>
+
 ## Example
 
 ### Create it
@@ -120,6 +139,7 @@ def read_root():
 def read_item(item_id: int, q: str = None):
     return {"item_id": item_id, "q": q}
 ```
+
 <details markdown="1">
 <summary>Or use <code>async def</code>...</summary>
 
@@ -142,7 +162,7 @@ async def read_item(item_id: int, q: str = None):
 ```
 
 **Note**:
-    
+
 If you don't know, check the _"In a hurry?"_ section about <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` and `await` in the docs</a>.
 
 </details>
@@ -151,10 +171,20 @@ If you don't know, check the _"In a hurry?"_ section about <a href="https://fast
 
 Run the server with:
 
-```bash
-uvicorn main:app --reload
+<div class="termy">
+
+```console
+$ uvicorn main:app --reload
+
+INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+INFO:     Started reloader process [28720]
+INFO:     Started server process [28722]
+INFO:     Waiting for application startup.
+INFO:     Application startup complete.
 ```
 
+</div>
+
 <details markdown="1">
 <summary>About the command <code>uvicorn main:app --reload</code>...</summary>
 
@@ -168,7 +198,7 @@ The command `uvicorn main:app` refers to:
 
 ### Check it
 
-Open your browser at <a href="http://127.0.0.1:8000/items/5?q=somequery" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>. 
+Open your browser at <a href="http://127.0.0.1:8000/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1:8000/items/5?q=somequery</a>.
 
 You will see the JSON response as:
 
@@ -185,18 +215,17 @@ You already created an API that:
 
 ### Interactive API docs
 
-Now go to <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>. 
+Now go to <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.
 
-You will see the automatic interactive API documentation (provided by <a href="https://github.com/swagger-api/swagger-ui" target="_blank">Swagger UI</a>):
+You will see the automatic interactive API documentation (provided by <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):
 
 ![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)
 
-
 ### Alternative API docs
 
-And now, go to <a href="http://127.0.0.1:8000/redoc" target="_blank">http://127.0.0.1:8000/redoc</a>.
+And now, go to <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>.
 
-You will see the alternative automatic documentation (provided by <a href="https://github.com/Rebilly/ReDoc" target="_blank">ReDoc</a>):
+You will see the alternative automatic documentation (provided by <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a>):
 
 ![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)
 
@@ -238,7 +267,7 @@ The server should reload automatically (because you added `--reload` to the `uvi
 
 ### Interactive API docs upgrade
 
-Now go to <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>.
+Now go to <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.
 
 * The interactive API documentation will be automatically updated, including the new body:
 
@@ -252,16 +281,14 @@ Now go to <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:
 
 ![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-05-swagger-04.png)
 
-
 ### Alternative API docs upgrade
 
-And now, go to <a href="http://127.0.0.1:8000/redoc" target="_blank">http://127.0.0.1:8000/redoc</a>.
+And now, go to <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>.
 
 * The alternative documentation will also reflect the new query parameter and body:
 
 ![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)
 
-
 ### Recap
 
 In summary, you declare **once** the types of parameters, body, etc. as function parameters. 
@@ -322,7 +349,7 @@ Coming back to the previous code example, **FastAPI** will:
     * Without the `None` it would be required (as is the body in the case with `PUT`).
 * For `PUT` requests to `/items/{item_id}`, Read the body as JSON:
     * Check that it has a required attribute `name` that should be a `str`. 
-    * Check that is has a required attribute `price` that has to be a `float`.
+    * Check that it has a required attribute `price` that has to be a `float`.
     * Check that it has an optional attribute `is_offer`, that should be a `bool`, if present.
     * All this would also work for deeply nested JSON objects.
 * Convert from and to JSON automatically.
@@ -331,7 +358,6 @@ Coming back to the previous code example, **FastAPI** will:
     * Automatic client code generation systems, for many languages.
 * Provide 2 interactive documentation web interfaces directly.
 
-
 ---
 
 We just scratched the surface, but you already get the idea of how it all works.
@@ -358,8 +384,7 @@ Try changing the line with:
 
 ![editor support](https://fastapi.tiangolo.com/img/vscode-completion.png)
 
-
-For a more complete example including more features, see the <a href="https://fastapi.tiangolo.com/tutorial/intro/">Tutorial - User Guide</a>.
+For a more complete example including more features, see the <a href="https://fastapi.tiangolo.com/tutorial/">Tutorial - User Guide</a>.
 
 **Spoiler alert**: the tutorial - user guide includes:
 
@@ -376,12 +401,11 @@ For a more complete example including more features, see the <a href="https://fa
     * **Cookie Sessions**
     * ...and more.
 
-
 ## Performance
 
-Independent TechEmpower benchmarks show **FastAPI** applications running under Uvicorn as <a href="https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7" target="_blank">one of the fastest Python frameworks available</a>, only below Starlette and Uvicorn themselves (used internally by FastAPI). (*)
+Independent TechEmpower benchmarks show **FastAPI** applications running under Uvicorn as <a href="https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7" class="external-link" target="_blank">one of the fastest Python frameworks available</a>, only below Starlette and Uvicorn themselves (used internally by FastAPI). (*)
 
-To understand more about it, see the section <a href="https://fastapi.tiangolo.com/benchmarks/" target="_blank">Benchmarks</a>.
+To understand more about it, see the section <a href="https://fastapi.tiangolo.com/benchmarks/" class="internal-link" target="_blank">Benchmarks</a>.
 
 ## Optional Dependencies
 
@@ -390,7 +414,6 @@ Used by Pydantic:
 * <a href="https://github.com/esnme/ultrajson" target="_blank"><code>ujson</code></a> - for faster JSON <abbr title="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>.
 * <a href="https://github.com/JoshData/python-email-validator" target="_blank"><code>email_validator</code></a> - for email validation.
 
-
 Used by Starlette:
 
 * <a href="http://docs.python-requests.org" target="_blank"><code>requests</code></a> - Required if you want to use the `TestClient`.
@@ -398,13 +421,14 @@ Used by Starlette:
 * <a href="http://jinja.pocoo.org" target="_blank"><code>jinja2</code></a> - Required if you want to use the default template configuration.
 * <a href="https://andrew-d.github.io/python-multipart/" target="_blank"><code>python-multipart</code></a> - Required if you want to support form <abbr title="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>, with `request.form()`.
 * <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Required for `SessionMiddleware` support.
-* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Required for `SchemaGenerator` support.
+* <a href="https://pyyaml.org/wiki/PyYAMLDocumentation" target="_blank"><code>pyyaml</code></a> - Required for Starlette's `SchemaGenerator` support (you probably don't need it with FastAPI).
 * <a href="https://graphene-python.org/" target="_blank"><code>graphene</code></a> - Required for `GraphQLApp` support.
 * <a href="https://github.com/esnme/ultrajson" target="_blank"><code>ujson</code></a> - Required if you want to use `UJSONResponse`.
 
 Used by FastAPI / Starlette:
 
 * <a href="http://www.uvicorn.org" target="_blank"><code>uvicorn</code></a> - for the server that loads and serves your application.
+* <a href="https://github.com/ijl/orjson" target="_blank"><code>orjson</code></a> - Required if you want to use `ORJSONResponse`.
 
 You can install all of these with `pip install fastapi[all]`.
 

docs/contributing.md

@@ -1,123 +0,0 @@
-First, you might want to see the basic ways to <a href="https://fastapi.tiangolo.com/help-fastapi/" target="_blank">help FastAPI and get help</a>.
-
-## Developing
-
-If you already cloned the repository and you know that you need to deep dive in the code, here are some guidelines to set up your environment.
-
-
-### Pipenv
-
-If you are using <a href="https://pipenv.readthedocs.io/en/latest/" target="_blank">Pipenv</a>, you can create a virtual environment and install the packages with:
-
-```bash
-pipenv install --dev
-```
-
-Then you can activate that virtual environment with:
-
-```bash
-pipenv shell
-```
-
-
-### No Pipenv
-
-If you are not using Pipenv, you can create a virtual environment with your preferred tool, and install the packages listed in the file `Pipfile`.
-
-
-### Flit
-
-**FastAPI** uses <a href="https://flit.readthedocs.io/en/latest/index.html" target="_blank">Flit</a> to build, package and publish the project.
-
-If you installed the development dependencies with one of the methods above, you already have the `flit` command.
-
-To install your local version of FastAPI as a package in your local environment, run:
-
-```bash
-flit install --symlink
-```
-
-It will install your local FastAPI in your local environment.
-
-
-#### Using your local FastAPI
-
-If you create a Python file that imports and uses FastAPI, and run it with the Python from your local environment, it will use your local FastAPI source code.
-
-And if you update that local FastAPI source code, as it is installed with `--symlink`, when you run that Python file again, it will use the fresh version of FastAPI you just edited.
-
-That way, you don't have to "install" your local version to be able to test every change.
-
-
-### Format
-
-There is a script that you can run that will format and clean all your code:
-
-```bash
-bash scripts/lint.sh
-```
-
-It will also auto-sort all your imports.
-
-For it to sort them correctly, you need to have FastAPI installed locally in your environment, with the command in the section above:
-
-```bash
-flit install --symlink
-```
-
-
-### Docs
-
-The documentation uses <a href="https://www.mkdocs.org/" target="_blank">MkDocs</a>.
-
-All the documentation is in Markdown format in the directory `./docs`.
-
-Many of the tutorials have blocks of code.
-
-In most of the cases, these blocks of code are actual complete applications that can be run as is.
-
-In fact, those blocks of code are not written inside the Markdown, they are Python files in the `./docs/src/` directory.
-
-And those Python files are included/injected in the documentation when generating the site.
-
-
-#### Docs for tests
-
-Most of the tests actually run against the example source files in the documentation.
-
-This helps making sure that:
-
-* The documentation is up to date.
-* The documentation examples can be run as is.
-* Most of the features are covered by the documentation, ensured by the coverage tests.
-
-During local development, there is a script that builds the site and checks for any changes, live-reloading:
-
-```bash
-bash scripts/docs-live.sh
-```
-
-It will serve the documentation on `http://0.0.0.0:8008`.
-
-That way, you can edit the documentation/source files and see the changes live.
-
-#### Apps and docs at the same time
-
-And if you run the examples with, e.g.:
-
-```bash
-uvicorn tutorial001:app --reload
-```
-
-as Uvicorn by default will use the port `8000`, the documentation on port `8008` won't clash.
-
-
-### Tests
-
-There is a script that you can run locally to test all the code and generate coverage reports in HTML:
-
-```bash
-bash scripts/test-cov-html.sh
-```
-
-This command generates a directory `./htmlcov/`, if you open the file `./htmlcov/index.html` in your browser, you can explore interactively the regions of code that are covered by the tests, and notice if there is any region missing.

docs/en/docs/advanced/additional-responses.md

@@ -1,6 +1,8 @@
+# Additional Responses in OpenAPI
+
 !!! warning
     This is a rather advanced topic.
-    
+
     If you are starting with **FastAPI**, you might not need this.
 
 You can declare additional responses, with additional status codes, media types, descriptions, etc.
@@ -21,9 +23,8 @@ Each of those response `dict`s can have a key `model`, containing a Pydantic mod
 
 For example, to declare another response with a status code `404` and a Pydantic model `Message`, you can write:
 
-
 ```Python hl_lines="18 23"
-{!./src/additional_responses/tutorial001.py!}
+{!../../../docs_src/additional_responses/tutorial001.py!}
 ```
 
 !!! note
@@ -168,7 +169,7 @@ You can use this same `responses` parameter to add different media types for the
 For example, you can add an additional media type of `image/png`, declaring that your *path operation* can return a JSON object (with media type `application/json`) or a PNG image:
 
 ```Python hl_lines="17 18 19 20 21 22 23 24 28"
-{!./src/additional_responses/tutorial002.py!}
+{!../../../docs_src/additional_responses/tutorial002.py!}
 ```
 
 !!! note
@@ -192,14 +193,13 @@ For example, you can declare a response with a status code `404` that uses a Pyd
 And a response with a status code `200` that uses your `response_model`, but includes a custom `example`:
 
 ```Python hl_lines="20 21 22 23 24 25 26 27 28 29 30 31"
-{!./src/additional_responses/tutorial003.py!}
+{!../../../docs_src/additional_responses/tutorial003.py!}
 ```
 
 It will all be combined and included in your OpenAPI, and shown in the API docs:
 
 <img src="/img/tutorial/additional-responses/image01.png">
 
-
 ## Combine predefined responses and custom ones
 
 You might want to have some predefined responses that apply to many *path operations*, but you want to combine them with custom responses needed by each *path operation*.
@@ -229,12 +229,12 @@ You can use that technique to re-use some predefined responses in your *path ope
 For example:
 
 ```Python hl_lines="11 12 13 14 15 24"
-{!./src/additional_responses/tutorial004.py!}
+{!../../../docs_src/additional_responses/tutorial004.py!}
 ```
 
 ## More information about OpenAPI responses
 
 To see what exactly you can include in the responses, you can check these sections in the OpenAPI specification:
 
-* <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject" target="_blank">OpenAPI Responses Object</a>, it includes the `Response Object`.
-* <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responseObject" target="_blank">OpenAPI Response Object</a>, you can include anything from this directly in each response inside your `responses` parameter. Including `description`, `headers`, `content` (inside of this is that you declare different media types and JSON Schemas), and `links`.
+* <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject" class="external-link" target="_blank">OpenAPI Responses Object</a>, it includes the `Response Object`.
+* <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responseObject" class="external-link" target="_blank">OpenAPI Response Object</a>, you can include anything from this directly in each response inside your `responses` parameter. Including `description`, `headers`, `content` (inside of this is that you declare different media types and JSON Schemas), and `links`.

docs/en/docs/advanced/additional-status-codes.md

@@ -1,4 +1,6 @@
-By default, **FastAPI** will return the responses using Starlette's `JSONResponse`, putting the content you return from your *path operation* inside of that `JSONResponse`.
+# Additional Status Codes
+
+By default, **FastAPI** will return the responses using a `JSONResponse`, putting the content you return from your *path operation* inside of that `JSONResponse`.
 
 It will use the default status code or the one you set in your *path operation*.
 
@@ -12,8 +14,8 @@ But you also want it to accept new items. And when the items didn't exist before
 
 To achieve that, import `JSONResponse`, and return your content there directly, setting the `status_code` that you want:
 
-```Python hl_lines="2 20"
-{!./src/additional_status_codes/tutorial001.py!}
+```Python hl_lines="2  19"
+{!../../../docs_src/additional_status_codes/tutorial001.py!}
 ```
 
 !!! warning
@@ -23,8 +25,13 @@ To achieve that, import `JSONResponse`, and return your content there directly,
     
     Make sure it has the data you want it to have, and that the values are valid JSON (if you are using `JSONResponse`).
 
+!!! note "Technical Details"
+    You could also use `from starlette.responses import JSONResponse`.
+
+    **FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette. The same with `status`.
+
 ## OpenAPI and API docs
 
-If you return additional status codes and responses directly, they won't be included in the OpenAPI schema (the API docs), because FastAPI doesn't have a way to know before hand what you are going to return.
+If you return additional status codes and responses directly, they won't be included in the OpenAPI schema (the API docs), because FastAPI doesn't have a way to know beforehand what you are going to return.
 
-But you can document that in your code, using: <a href="https://fastapi.tiangolo.com/tutorial/additional-responses/" target="_blank">Additional Responses</a>.
+But you can document that in your code, using: [Additional Responses](additional-responses.md){.internal-link target=_blank}.

docs/en/docs/advanced/advanced-dependencies.md

@@ -1,7 +1,4 @@
-!!! warning
-    This is, more or less, an "advanced" chapter.
-    
-    If you are just starting with **FastAPI** you might want to skip this chapter and come back to it later.
+# Advanced Dependencies
 
 ## Parameterized dependencies
 
@@ -22,7 +19,7 @@ Not the class itself (which is already a callable), but an instance of that clas
 To do that, we declare a method `__call__`:
 
 ```Python hl_lines="10"
-{!./src/dependencies/tutorial011.py!}
+{!../../../docs_src/dependencies/tutorial011.py!}
 ```
 
 In this case, this `__call__` is what **FastAPI** will use to check for additional parameters and sub-dependencies, and this is what will be called to pass a value to the parameter in your *path operation function* later.
@@ -32,7 +29,7 @@ In this case, this `__call__` is what **FastAPI** will use to check for addition
 And now, we can use `__init__` to declare the parameters of the instance that we can use to "parameterize" the dependency:
 
 ```Python hl_lines="7"
-{!./src/dependencies/tutorial011.py!}
+{!../../../docs_src/dependencies/tutorial011.py!}
 ```
 
 In this case, **FastAPI** won't ever touch or care about `__init__`, we will use it directly in our code.
@@ -42,7 +39,7 @@ In this case, **FastAPI** won't ever touch or care about `__init__`, we will use
 We could create an instance of this class with:
 
 ```Python hl_lines="16"
-{!./src/dependencies/tutorial011.py!}
+{!../../../docs_src/dependencies/tutorial011.py!}
 ```
 
 And that way we are able to "parameterize" our dependency, that now has `"bar"` inside of it, as the attribute `checker.fixed_content`.
@@ -57,10 +54,10 @@ And when solving the dependency, **FastAPI** will call this `checker` like:
 checker(q="somequery")
 ```
 
-...and pass whatever that returns as the value of the dependency in our path operation function as the parameter `fixed_content_included`:
+...and pass whatever that returns as the value of the dependency in our *path operation function* as the parameter `fixed_content_included`:
 
 ```Python hl_lines="20"
-{!./src/dependencies/tutorial011.py!}
+{!../../../docs_src/dependencies/tutorial011.py!}
 ```
 
 !!! tip
@@ -68,6 +65,6 @@ checker(q="somequery")
 
     These examples are intentionally simple, but show how it all works.
 
-    In the chapters about security, you will be using utility functions that are implemented in this same way.
+    In the chapters about security, there are utility functions that are implemented in this same way.
 
     If you understood all this, you already know how those utility tools for security work underneath.

docs/en/docs/advanced/async-sql-databases.md

@@ -1,4 +1,6 @@
-You can also use <a href="https://github.com/encode/databases" target="_blank">`encode/databases`</a> with **FastAPI** to connect to databases using `async` and `await`.
+# Async SQL (Relational) Databases
+
+You can also use <a href="https://github.com/encode/databases" class="external-link" target="_blank">`encode/databases`</a> with **FastAPI** to connect to databases using `async` and `await`.
 
 It is compatible with:
 
@@ -11,9 +13,9 @@ In this example, we'll use **SQLite**, because it uses a single file and Python
 Later, for your production application, you might want to use a database server like **PostgreSQL**.
 
 !!! tip
-    You could adopt ideas from the previous section about <a href="/tutorial/sql-databases/" target="_blank">SQLAlchemy ORM</a>, like using utility functions to perform operations in the database, independent of your **FastAPI** code.
+    You could adopt ideas from the section about SQLAlchemy ORM ([SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank}), like using utility functions to perform operations in the database, independent of your **FastAPI** code.
 
-    This section doesn't apply those ideas, to be equivalent to the counterpart in <a href="https://www.starlette.io/database/" target="_blank">Starlette</a>.
+    This section doesn't apply those ideas, to be equivalent to the counterpart in <a href="https://www.starlette.io/database/" class="external-link" target="_blank">Starlette</a>.
 
 ## Import and set up `SQLAlchemy`
 
@@ -22,7 +24,7 @@ Later, for your production application, you might want to use a database server
 * Create a table `notes` using the `metadata` object.
 
 ```Python hl_lines="4 14 16 17 18 19 20 21 22"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 !!! tip
@@ -37,7 +39,7 @@ Later, for your production application, you might want to use a database server
 * Create a `database` object.
 
 ```Python hl_lines="3 9 12"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 !!! tip
@@ -53,7 +55,7 @@ Here, this section would run directly, right before starting your **FastAPI** ap
 * Create all the tables from the `metadata` object.
 
 ```Python hl_lines="25 26 27 28"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 ## Create models
@@ -64,7 +66,7 @@ Create Pydantic models for:
 * Notes to be returned (`Note`).
 
 ```Python hl_lines="31 32 33 36 37 38 39"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 By creating these Pydantic models, the input data will be validated, serialized (converted), and annotated (documented).
@@ -77,7 +79,7 @@ So, you will be able to see it all in the interactive API docs.
 * Create event handlers to connect and disconnect from the database.
 
 ```Python hl_lines="42 45 46 47 50 51 52"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 ## Read notes
@@ -85,7 +87,7 @@ So, you will be able to see it all in the interactive API docs.
 Create the *path operation function* to read notes:
 
 ```Python hl_lines="55 56 57 58"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 !!! Note
@@ -102,7 +104,7 @@ That documents (and validates, serializes, filters) the output data, as a `list`
 Create the *path operation function* to create notes:
 
 ```Python hl_lines="61 62 63 64 65"
-{!./src/async_sql_databases/tutorial001.py!}
+{!../../../docs_src/async_sql_databases/tutorial001.py!}
 ```
 
 !!! Note
@@ -149,7 +151,7 @@ So, the final result returned would be something like:
 
 ## Check it
 
-You can copy this code as is, and see the docs at <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>.
+You can copy this code as is, and see the docs at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.
 
 There you can see all your API documented and interact with it:
 
@@ -157,4 +159,4 @@ There you can see all your API documented and interact with it:
 
 ## More info
 
-You can read more about <a href="https://github.com/encode/databases" target="_blank">`encode/databases` at its GitHub page</a>.
+You can read more about <a href="https://github.com/encode/databases" class="external-link" target="_blank">`encode/databases` at its GitHub page</a>.

docs/en/docs/advanced/conditional-openapi.md

@@ -0,0 +1,58 @@
+# Conditional OpenAPI
+
+If you needed to, you could use settings and environment variables to configure OpenAPI conditionally depending on the environment, and even disable it entirely.
+
+## About security, APIs, and docs
+
+Hiding your documentation user interfaces in production *shouldn't* be the way to protect your API.
+
+That doesn't add any extra security to your API, the *path operations* will still be available where they are.
+
+If there's a security flaw in your code, it will still exist.
+
+Hiding the documentation just makes it more difficult to understand how to interact with your API, and could make it more difficult for you to debug it in production. It could be considered simply a form of <a href="https://en.wikipedia.org/wiki/Security_through_obscurity" class="external-link" target="_blank">Security through obscurity</a>.
+
+If you want to secure your API, there are several better things you can do, for example:
+
+* Make sure you have well defined Pydantic models for your request bodies and responses.
+* Configure any required permissions and roles using dependencies.
+* Never store plaintext passwords, only password hashes.
+* Implement and use well-known cryptographic tools, like Passlib and JWT tokens, etc.
+* Add more granular permission controls with OAuth2 scopes where needed.
+* ...etc.
+
+Nevertheless, you might have a very specific use case where you really need to disable the API docs for some environment (e.g. for production) or depending on configurations from environment variables.
+
+## Conditional OpenAPI from settings and env vars
+
+You can easily use the same Pydantic settings to configure your generated OpenAPI and the docs UIs.
+
+For example:
+
+```Python hl_lines="6  11"
+{!../../../docs_src/conditional_openapi/tutorial001.py!}
+```
+
+Here we declare the setting `openapi_url` with the same default of `"/openapi.json"`.
+
+And then we use it when creating the `FastAPI` app.
+
+Then you could disable OpenAPI (including the UI docs) by setting the environment variable `OPENAPI_URL` to the empty string, like:
+
+<div class="termy">
+
+```console
+$ OPENAPI_URL= uvicorn main:app
+
+<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+```
+
+</div>
+
+Then if you go to the URLs at `/openapi.json`, `/docs`, or `/redoc` you will just get a `404 Not Found` error like:
+
+```JSON
+{
+    "detail": "Not Found"
+}
+```

docs/en/docs/advanced/custom-request-and-route.md

@@ -1,3 +1,5 @@
+# Custom Request and APIRoute class
+
 In some cases, you may want to override the logic used by the `Request` and `APIRoute` classes.
 
 In particular, this may be a good alternative to logic in a middleware.
@@ -13,10 +15,9 @@ For example, if you want to read or manipulate the request body before it is pro
 
 Some use cases include:
 
-* Converting non-JSON request bodies to JSON (e.g. [`msgpack`](https://msgpack.org/index.html)).
+* Converting non-JSON request bodies to JSON (e.g. <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
 * Decompressing gzip-compressed request bodies.
 * Automatically logging all request bodies.
-* Accessing the request body in an exception handler.
 
 ## Handling custom request body encodings
 
@@ -26,14 +27,17 @@ And an `APIRoute` subclass to use that custom request class.
 
 ### Create a custom `GzipRequest` class
 
+!!! tip
+    This is a toy example to demonstrate how it works, if you need Gzip support, you can use the provided [`GzipMiddleware`](./middleware.md#gzipmiddleware){.internal-link target=_blank}.
+
 First, we create a `GzipRequest` class, which will overwrite the `Request.body()` method to decompress the body in the presence of an appropriate header.
 
 If there's no `gzip` in the header, it will not try to decompress the body.
 
 That way, the same route class can handle gzip compressed or uncompressed requests.
 
-```Python hl_lines="10 11 12 13 14 15 16 17"
-{!./src/custom_request_and_route/tutorial001.py!}
+```Python hl_lines="8 9 10 11 12 13 14 15"
+{!../../../docs_src/custom_request_and_route/tutorial001.py!}
 ```
 
 ### Create a custom `GzipRoute` class
@@ -46,8 +50,8 @@ This method returns a function. And that function is what will receive a request
 
 Here we use it to create a `GzipRequest` from the original request.
 
-```Python hl_lines="20 21 22 23 24 25 26 27 28"
-{!./src/custom_request_and_route/tutorial001.py!}
+```Python hl_lines="18 19 20 21 22 23 24 25 26"
+{!../../../docs_src/custom_request_and_route/tutorial001.py!}
 ```
 
 !!! note "Technical Details"
@@ -59,7 +63,7 @@ Here we use it to create a `GzipRequest` from the original request.
 
     And those two things, `scope` and `receive`, are what is needed to create a new `Request` instance.
 
-    To learn more about the `Request` check <a href="https://www.starlette.io/requests/" target="_blank">Starlette's docs about Requests</a>.
+    To learn more about the `Request` check <a href="https://www.starlette.io/requests/" class="external-link" target="_blank">Starlette's docs about Requests</a>.
 
 The only thing the function returned by `GzipRequest.get_route_handler` does differently is convert the `Request` to a `GzipRequest`.
 
@@ -71,30 +75,35 @@ But because of our changes in `GzipRequest.body`, the request body will be autom
 
 ## Accessing the request body in an exception handler
 
+!!! tip
+    To solve this same problem, it's probably a lot easier to use the `body` in a custom handler for `RequestValidationError` ([Handling Errors](../tutorial/handling-errors.md#use-the-requestvalidationerror-body){.internal-link target=_blank}).
+
+    But this example is still valid and it shows how to interact with the internal components.
+
 We can also use this same approach to access the request body in an exception handler.
 
 All we need to do is handle the request inside a `try`/`except` block:
 
-```Python hl_lines="15 17"
-{!./src/custom_request_and_route/tutorial002.py!}
+```Python hl_lines="13 15"
+{!../../../docs_src/custom_request_and_route/tutorial002.py!}
 ```
 
 If an exception occurs, the`Request` instance will still be in scope, so we can read and make use of the request body when handling the error:
 
-```Python hl_lines="18 19 20"
-{!./src/custom_request_and_route/tutorial002.py!}
+```Python hl_lines="16 17 18"
+{!../../../docs_src/custom_request_and_route/tutorial002.py!}
 ```
 
 ## Custom `APIRoute` class in a router
 
 You can also set the `route_class` parameter of an `APIRouter`:
 
-```Python hl_lines="25"
-{!./src/custom_request_and_route/tutorial003.py!}
+```Python hl_lines="26"
+{!../../../docs_src/custom_request_and_route/tutorial003.py!}
 ```
 
 In this example, the *path operations* under the `router` will use the custom `TimedRoute` class, and will have an extra `X-Response-Time` header in the response with the time it took to generate the response:
 
-```Python hl_lines="15 16 17 18 19"
-{!./src/custom_request_and_route/tutorial003.py!}
+```Python hl_lines="13 14 15 16 17 18 19 20"
+{!../../../docs_src/custom_request_and_route/tutorial003.py!}
 ```

docs/en/docs/advanced/custom-response.md

@@ -0,0 +1,208 @@
+# Custom Response - HTML, Stream, File, others
+
+By default, **FastAPI** will return the responses using `JSONResponse`.
+
+You can override it by returning a `Response` directly as seen in [Return a Response directly](response-directly.md){.internal-link target=_blank}.
+
+But if you return a `Response` directly, the data won't be automatically converted, and the documentation won't be automatically generated (for example, including the specific "media type", in the HTTP header `Content-Type` as part of the generated OpenAPI).
+
+But you can also declare the `Response` that you want to be used, in the *path operation decorator*.
+
+The contents that you return from your *path operation function* will be put inside of that `Response`.
+
+And if that `Response` has a JSON media type (`application/json`), like is the case with the `JSONResponse` and `UJSONResponse`, the data you return will be automatically converted (and filtered) with any Pydantic `response_model` that you declared in the *path operation decorator*.
+
+!!! note
+    If you use a response class with no media type, FastAPI will expect your response to have no content, so it will not document the response format in its generated OpenAPI docs.
+
+## Use `ORJSONResponse`
+
+For example, if you are squeezing performance, you can install and use <a href="https://github.com/ijl/orjson" class="external-link" target="_blank">`orjson`</a> and set the response to be `ORJSONResponse`.
+
+Import the `Response` class (sub-class) you want to use and declare it in the *path operation decorator*.
+
+```Python hl_lines="2 7"
+{!../../../docs_src/custom_response/tutorial001b.py!}
+```
+
+!!! info
+    The parameter `response_class` will also be used to define the "media type" of the response.
+
+    In this case, the HTTP header `Content-Type` will be set to `application/json`.
+
+    And it will be documented as such in OpenAPI.
+
+!!! tip
+    The `ORJSONResponse` is currently only available in FastAPI, not in Starlette.
+
+## HTML Response
+
+To return a response with HTML directly from **FastAPI**, use `HTMLResponse`.
+
+* Import `HTMLResponse`.
+* Pass `HTMLResponse` as the parameter `content_type` of your *path operation*.
+
+```Python hl_lines="2 7"
+{!../../../docs_src/custom_response/tutorial002.py!}
+```
+
+!!! info
+    The parameter `response_class` will also be used to define the "media type" of the response.
+
+    In this case, the HTTP header `Content-Type` will be set to `text/html`.
+
+    And it will be documented as such in OpenAPI.
+
+### Return a `Response`
+
+As seen in [Return a Response directly](response-directly.md){.internal-link target=_blank}, you can also override the response directly in your *path operation*, by returning it.
+
+The same example from above, returning an `HTMLResponse`, could look like:
+
+```Python hl_lines="2 7 19"
+{!../../../docs_src/custom_response/tutorial003.py!}
+```
+
+!!! warning
+    A `Response` returned directly by your *path operation function* won't be documented in OpenAPI (for example, the `Content-Type` won't be documented) and won't be visible in the automatic interactive docs.
+
+!!! info
+    Of course, the actual `Content-Type` header, status code, etc, will come from the `Response` object your returned.
+
+### Document in OpenAPI and override `Response`
+
+If you want to override the response from inside of the function but at the same time document the "media type" in OpenAPI, you can use the `response_class` parameter AND return a `Response` object.
+
+The `response_class` will then be used only to document the OpenAPI *path operation*, but your `Response` will be used as is.
+
+#### Return an `HTMLResponse` directly
+
+For example, it could be something like:
+
+```Python hl_lines="7 23 21"
+{!../../../docs_src/custom_response/tutorial004.py!}
+```
+
+In this example, the function `generate_html_response()` already generates and returns a `Response` instead of returning the HTML in a `str`.
+
+By returning the result of calling `generate_html_response()`, you are already returning a `Response` that will override the default **FastAPI** behavior.
+
+But as you passed the `HTMLResponse` in the `response_class` too, **FastAPI** will know how to document it in OpenAPI and the interactive docs as HTML with `text/html`:
+
+<img src="/img/tutorial/custom-response/image01.png">
+
+## Available responses
+
+Here are some of the available responses.
+
+Have in mind that you can use `Response` to return anything else, or even create a custom sub-class.
+
+!!! note "Technical Details"
+    You could also use `from starlette.responses import HTMLResponse`.
+
+    **FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.
+
+### `Response`
+
+The main `Response` class, all the other responses inherit from it.
+
+You can return it directly.
+
+It accepts the following parameters:
+
+* `content` - A `str` or `bytes`.
+* `status_code` - An `int` HTTP status code.
+* `headers` - A `dict` of strings.
+* `media_type` - A `str` giving the media type. E.g. `"text/html"`.
+
+FastAPI (actually Starlette) will automatically include a Content-Length header. It will also include a Content-Type header, based on the media_type and appending a charset for text types.
+
+```Python hl_lines="1  18"
+{!../../../docs_src/response_directly/tutorial002.py!}
+```
+
+### `HTMLResponse`
+
+Takes some text or bytes and returns an HTML response, as you read above.
+
+### `PlainTextResponse`
+
+Takes some text or bytes and returns an plain text response.
+
+```Python hl_lines="2  7  9"
+{!../../../docs_src/custom_response/tutorial005.py!}
+```
+
+### `JSONResponse`
+
+Takes some data and returns an `application/json` encoded response.
+
+This is the default response used in **FastAPI**, as you read above.
+
+### `ORJSONResponse`
+
+A fast alternative JSON response using <a href="https://github.com/ijl/orjson" class="external-link" target="_blank">`orjson`</a>, as you read above.
+
+### `UJSONResponse`
+
+An alternative JSON response using <a href="https://github.com/ultrajson/ultrajson" class="external-link" target="_blank">`ujson`</a>.
+
+!!! warning
+    `ujson` is less careful than Python's built-in implementation in how it handles some edge-cases.
+
+```Python hl_lines="2 7"
+{!../../../docs_src/custom_response/tutorial001.py!}
+```
+
+!!! tip
+    It's possible that `ORJSONResponse` might be a faster alternative.
+
+### `RedirectResponse`
+
+Returns an HTTP redirect. Uses a 307 status code (Temporary Redirect) by default.
+
+```Python hl_lines="2  9"
+{!../../../docs_src/custom_response/tutorial006.py!}
+```
+
+### `StreamingResponse`
+
+Takes an async generator or a normal generator/iterator and streams the response body.
+
+```Python hl_lines="2  14"
+{!../../../docs_src/custom_response/tutorial007.py!}
+```
+
+#### Using `StreamingResponse` with file-like objects
+
+If you have a file-like object (e.g. the object returned by `open()`), you can return it in a `StreamingResponse`.
+
+This includes many libraries to interact with cloud storage, video processing, and others.
+
+```Python hl_lines="2  10 11"
+{!../../../docs_src/custom_response/tutorial008.py!}
+```
+
+!!! tip
+    Notice that here as we are using standard `open()` that doesn't support `async` and `await`, we declare the path operation with normal `def`.
+
+### `FileResponse`
+
+Asynchronously streams a file as the response.
+
+Takes a different set of arguments to instantiate than the other response types:
+
+* `path` - The filepath to the file to stream.
+* `headers` - Any custom headers to include, as a dictionary.
+* `media_type` - A string giving the media type. If unset, the filename or path will be used to infer a media type.
+* `filename` - If set, this will be included in the response `Content-Disposition`.
+
+File responses will include appropriate `Content-Length`, `Last-Modified` and `ETag` headers.
+
+```Python hl_lines="2  10"
+{!../../../docs_src/custom_response/tutorial009.py!}
+```
+
+## Additional documentation
+
+You can also declare the media type and many other details in OpenAPI using `responses`: [Additional Responses in OpenAPI](additional-responses.md){.internal-link target=_blank}.

docs/en/docs/advanced/events.md

@@ -1,3 +1,4 @@
+# Events: startup - shutdown
 
 You can define event handlers (functions) that need to be executed before the application starts up, or when the application is shutting down.
 
@@ -8,7 +9,7 @@ These functions can be declared with `async def` or normal `def`.
 To add a function that should be run before the application starts, declare it with the event `"startup"`:
 
 ```Python hl_lines="8"
-{!./src/events/tutorial001.py!}
+{!../../../docs_src/events/tutorial001.py!}
 ```
 
 In this case, the `startup` event handler function will initialize the items "database" (just a `dict`) with some values.
@@ -22,7 +23,7 @@ And your application won't start receiving requests until all the `startup` even
 To add a function that should be run when the application is shutting down, declare it with the event `"shutdown"`:
 
 ```Python hl_lines="6"
-{!./src/events/tutorial002.py!}
+{!../../../docs_src/events/tutorial002.py!}
 ```
 
 Here, the `shutdown` event handler function will write a text line `"Application shutdown"` to a file `log.txt`.
@@ -32,12 +33,12 @@ Here, the `shutdown` event handler function will write a text line `"Application
 
 !!! tip
     Notice that in this case we are using a standard Python `open()` function that interacts with a file.
-    
+
     So, it involves I/O (input/output), that requires "waiting" for things to be written to disk.
-    
+
     But `open()` doesn't use `async` and `await`.
-    
+
     So, we declare the event handler function with standard `def` instead of `async def`.
 
 !!! info
-    You can read more about these event handlers in <a href="https://www.starlette.io/events/" target="_blank">Starlette's  Events' docs</a>.
+    You can read more about these event handlers in <a href="https://www.starlette.io/events/" class="external-link" target="_blank">Starlette's  Events' docs</a>.

docs/en/docs/advanced/extending-openapi.md

@@ -1,3 +1,5 @@
+# Extending OpenAPI
+
 !!! warning
     This is a rather advanced feature. You probably can skip it.
 
@@ -5,7 +7,6 @@
 
     If you already know that you need to modify the generated OpenAPI schema, continue reading.
 
-
 There are some cases where you might need to modify the generated OpenAPI schema.
 
 In this section you will see how.
@@ -37,14 +38,14 @@ And that function `get_openapi()` receives as parameters:
 
 Using the information above, you can use the same utility function to generate the OpenAPI schema and override each part that you need.
 
-For example, let's add <a href="https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo" target="_blank">ReDoc's OpenAPI extension to include a custom logo</a>.
+For example, let's add <a href="https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo" class="external-link" target="_blank">ReDoc's OpenAPI extension to include a custom logo</a>.
 
 ### Normal **FastAPI**
 
 First, write all your **FastAPI** application as normally:
 
 ```Python hl_lines="1 4 7 8 9"
-{!./src/extending_openapi/tutorial001.py!}
+{!../../../docs_src/extending_openapi/tutorial001.py!}
 ```
 
 ### Generate the OpenAPI schema
@@ -52,7 +53,7 @@ First, write all your **FastAPI** application as normally:
 Then, use the same utility function to generate the OpenAPI schema, inside a `custom_openapi()` function:
 
 ```Python hl_lines="2 15 16 17 18 19 20"
-{!./src/extending_openapi/tutorial001.py!}
+{!../../../docs_src/extending_openapi/tutorial001.py!}
 ```
 
 ### Modify the OpenAPI schema
@@ -60,7 +61,7 @@ Then, use the same utility function to generate the OpenAPI schema, inside a `cu
 Now you can add the ReDoc extension, adding a custom `x-logo` to the `info` "object" in the OpenAPI schema:
 
 ```Python hl_lines="21 22 23"
-{!./src/extending_openapi/tutorial001.py!}
+{!../../../docs_src/extending_openapi/tutorial001.py!}
 ```
 
 ### Cache the OpenAPI schema
@@ -72,7 +73,7 @@ That way, your application won't have to generate the schema every time a user o
 It will be generated only once, and then the same cached schema will be used for the next requests.
 
 ```Python hl_lines="13 14 24 25"
-{!./src/extending_openapi/tutorial001.py!}
+{!../../../docs_src/extending_openapi/tutorial001.py!}
 ```
 
 ### Override the method
@@ -80,12 +81,12 @@ It will be generated only once, and then the same cached schema will be used for
 Now you can replace the `.openapi()` method with your new function.
 
 ```Python hl_lines="28"
-{!./src/extending_openapi/tutorial001.py!}
+{!../../../docs_src/extending_openapi/tutorial001.py!}
 ```
 
 ### Check it
 
-Once you go to <a href="http://127.0.0.1:8000/redoc" target="_blank">http://127.0.0.1:8000/redoc</a> you will see that you are using your custom logo (in this example, **FastAPI**'s logo):
+Once you go to <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a> you will see that you are using your custom logo (in this example, **FastAPI**'s logo):
 
 <img src="/img/tutorial/extending-openapi/image01.png">
 
@@ -132,12 +133,12 @@ You can probably right-click each link and select an option similar to `Save lin
 
 **Swagger UI** uses the files:
 
-* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@3/swagger-ui-bundle.js">`swagger-ui-bundle.js`</a>
-* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@3/swagger-ui.css" target="_blank">`swagger-ui.css`</a>
+* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@3/swagger-ui-bundle.js" class="external-link" target="_blank">`swagger-ui-bundle.js`</a>
+* <a href="https://cdn.jsdelivr.net/npm/swagger-ui-dist@3/swagger-ui.css" class="external-link" target="_blank">`swagger-ui.css`</a>
 
 And **ReDoc** uses the file:
 
-* <a href="https://cdn.jsdelivr.net/npm/redoc@next/bundles/redoc.standalone.js" target="_blank">`redoc.standalone.js`</a>
+* <a href="https://cdn.jsdelivr.net/npm/redoc@next/bundles/redoc.standalone.js" class="external-link" target="_blank">`redoc.standalone.js`</a>
 
 After that, your file structure could look like:
 
@@ -156,22 +157,29 @@ After that, your file structure could look like:
 
 Now you need to install `aiofiles`:
 
-```bash
-pip install aiofiles
+
+<div class="termy">
+
+```console
+$ pip install aiofiles
+
+---> 100%
 ```
 
+</div>
+
 ### Serve the static files
 
-* Import `StaticFiles` from Starlette.
-* "Mount" it the same way you would <a href="https://fastapi.tiangolo.com/tutorial/sub-applications-proxy/" target="_blank">mount a Sub-Application</a>.
+* Import `StaticFiles`.
+* "Mount" a `StaticFiles()` instance in a specific path.
 
 ```Python hl_lines="7 11"
-{!./src/extending_openapi/tutorial002.py!}
+{!../../../docs_src/extending_openapi/tutorial002.py!}
 ```
 
 ### Test the static files
 
-Start your application and go to <a href="http://127.0.0.1:8000/static/redoc.standalone.js" target="_blank">http://127.0.0.1:8000/static/redoc.standalone.js</a>.
+Start your application and go to <a href="http://127.0.0.1:8000/static/redoc.standalone.js" class="external-link" target="_blank">http://127.0.0.1:8000/static/redoc.standalone.js</a>.
 
 You should see a very long JavaScript file for **ReDoc**.
 
@@ -200,7 +208,7 @@ The first step is to disable the automatic docs, as those use the CDN by default
 To disable them, set their URLs to `None` when creating your `FastAPI` app:
 
 ```Python hl_lines="9"
-{!./src/extending_openapi/tutorial002.py!}
+{!../../../docs_src/extending_openapi/tutorial002.py!}
 ```
 
 ### Include the custom docs
@@ -218,7 +226,7 @@ You can re-use FastAPI's internal functions to create the HTML pages for the doc
 And similarly for ReDoc...
 
 ```Python hl_lines="2 3 4 5 6   14 15 16 17 18 19 20 21 22    25 26 27   30 31 32 33 34 35 36"
-{!./src/extending_openapi/tutorial002.py!}
+{!../../../docs_src/extending_openapi/tutorial002.py!}
 ```
 
 !!! tip
@@ -230,14 +238,14 @@ And similarly for ReDoc...
 
 ### Create a *path operation* to test it
 
-Now, to be able to test that everything works, create a path operation:
+Now, to be able to test that everything works, create a *path operation*:
 
 ```Python hl_lines="39 40 41"
-{!./src/extending_openapi/tutorial002.py!}
+{!../../../docs_src/extending_openapi/tutorial002.py!}
 ```
 
 ### Test it
 
-Now, you should be able to disconnect your WiFi, go to your docs at <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>, and reload the page.
+Now, you should be able to disconnect your WiFi, go to your docs at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>, and reload the page.
 
 And even without Internet, you would be able to see the docs for your API and interact with it.

docs/en/docs/advanced/graphql.md

@@ -1,16 +1,17 @@
+# GraphQL
 
 **FastAPI** has optional support for GraphQL (provided by Starlette directly), using the `graphene` library.
 
-You can combine normal FastAPI path operations with GraphQL on the same application.
+You can combine normal FastAPI *path operations* with GraphQL on the same application.
 
 ## Import and use `graphene`
 
-GraphQL is implemented with Graphene, you can check <a href="https://docs.graphene-python.org/en/latest/quickstart/" target="_blank">Graphene's docs</a> for more details.
+GraphQL is implemented with Graphene, you can check <a href="https://docs.graphene-python.org/en/latest/quickstart/" class="external-link" target="_blank">Graphene's docs</a> for more details.
 
 Import `graphene` and define your GraphQL data:
 
 ```Python hl_lines="1 6 7 8 9 10"
-{!./src/graphql/tutorial001.py!}
+{!../../../docs_src/graphql/tutorial001.py!}
 ```
 
 ## Add Starlette's `GraphQLApp`
@@ -18,7 +19,7 @@ Import `graphene` and define your GraphQL data:
 Then import and add Starlette's `GraphQLApp`:
 
 ```Python hl_lines="3 14"
-{!./src/graphql/tutorial001.py!}
+{!../../../docs_src/graphql/tutorial001.py!}
 ```
 
 !!! info
@@ -26,13 +27,12 @@ Then import and add Starlette's `GraphQLApp`:
 
 ## Check it
 
-Run it with Uvicorn and open your browser at <a href="http://127.0.0.1:8000" target="_blank">http://127.0.0.1:8000</a>.
+Run it with Uvicorn and open your browser at <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.
 
 You will see GraphiQL web user interface:
 
 <img src="/img/tutorial/graphql/image01.png">
 
-
 ## More details
 
 For more details, including:
@@ -41,4 +41,4 @@ For more details, including:
 * Adding background tasks
 * Using normal or async functions
 
-check the official <a href="https://www.starlette.io/graphql/" target="_blank">Starlette GraphQL docs</a>.
+check the official <a href="https://www.starlette.io/graphql/" class="external-link" target="_blank">Starlette GraphQL docs</a>.

docs/en/docs/advanced/index.md

@@ -0,0 +1,18 @@
+# Advanced User Guide - Intro
+
+## Additional Features
+
+The main [Tutorial - User Guide](../tutorial/){.internal-link target=_blank} should be enough to give you a tour through all the main features of **FastAPI**.
+
+In the next sections you will see other options, configurations, and additional features.
+
+!!! tip
+    The next sections are **not necessarily "advanced"**.
+
+    And it's possible that for your use case, the solution is in one of them.
+
+## Read the Tutorial first
+
+You could still use most of the features in **FastAPI** with the knowledge from the main [Tutorial - User Guide](../tutorial/){.internal-link target=_blank}.
+
+And the next sections assume you already read it, and assume that you know those main ideas.

docs/en/docs/advanced/middleware.md

@@ -0,0 +1,99 @@
+# Advanced Middleware
+
+In the main tutorial you read how to add [Custom Middleware](../tutorial/middleware.md){.internal-link target=_blank} to your application.
+
+And then you also read how to handle [CORS with the `CORSMiddleware`](../tutorial/cors.md){.internal-link target=_blank}.
+
+In this section we'll see how to use other middlewares.
+
+## Adding ASGI middlewares
+
+As **FastAPI** is based on Starlette and implements the <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr> specification, you can use any ASGI middleware.
+
+A middleware doesn't have to be made for FastAPI or Starlette to work, as long as it follows the ASGI spec.
+
+In general, ASGI middlewares are classes that expect to receive an ASGI app as the first argument.
+
+So, in the documentation for third-party ASGI middlewares they will probably tell you to do something like:
+
+```Python
+from unicorn import UnicornMiddleware
+
+app = SomeASGIApp()
+
+new_app = UnicornMiddleware(app, some_config="rainbow")
+```
+
+But FastAPI (actually Starlette) provides a simpler way to do it that makes sure that the internal middlewares to handle server errors and custom exception handlers work properly.
+
+For that, you use `app.add_middleware()` (as in the example for CORS).
+
+```Python
+from fastapi import FastAPI
+from unicorn import UnicornMiddleware
+
+app = FastAPI()
+
+app.add_middleware(UnicornMiddleware, some_config="rainbow")
+```
+
+`app.add_middleware()` receives a middleware class as the first argument and any additional arguments to be passed to the middleware.
+
+## Integrated middlewares
+
+**FastAPI** includes several middlewares for common use cases, we'll see next how to use them.
+
+!!! note "Technical Details"
+    For the next examples, you could also use `from starlette.middleware.something import SomethingMiddleware`.
+
+    **FastAPI** provides several middlewares in `fastapi.middleware` just as a convenience for you, the developer. But most of the available middlewares come directly from Starlette.
+
+## `HTTPSRedirectMiddleware`
+
+Enforces that all incoming requests must either be `https` or `wss`.
+
+Any incoming requests to `http` or `ws` will be redirected to the secure scheme instead.
+
+```Python hl_lines="2  6"
+{!../../../docs_src/advanced_middleware/tutorial001.py!}
+```
+
+## `TrustedHostMiddleware`
+
+Enforces that all incoming requests have a correctly set `Host` header, in order to guard against HTTP Host Header attacks.
+
+```Python hl_lines="2  6 7 8"
+{!../../../docs_src/advanced_middleware/tutorial002.py!}
+```
+
+The following arguments are supported:
+
+* `allowed_hosts` - A list of domain names that should be allowed as hostnames. Wildcard domains such as `*.example.com` are supported for matching subdomains to allow any hostname either use `allowed_hosts=["*"]` or omit the middleware.
+
+If an incoming request does not validate correctly then a `400` response will be sent.
+
+## `GZipMiddleware`
+
+Handles GZip responses for any request that includes `"gzip"` in the `Accept-Encoding` header.
+
+The middleware will handle both standard and streaming responses.
+
+```Python hl_lines="2  6"
+{!../../../docs_src/advanced_middleware/tutorial003.py!}
+```
+
+The following arguments are supported:
+
+* `minimum_size` - Do not GZip responses that are smaller than this minimum size in bytes. Defaults to `500`.
+
+## Other middlewares
+
+There are many other ASGI middlewares.
+
+For example:
+
+* <a href="https://docs.sentry.io/platforms/python/asgi/" class="external-link" target="_blank">Sentry</a>
+* <a href="https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py" class="external-link" target="_blank">Uvicorn's `ProxyHeadersMiddleware`</a>
+* <a href="https://github.com/florimondmanca/msgpack-asgi" class="external-link" target="_blank">MessagePack</a>
+
+To see other available middlewares check <a href="https://www.starlette.io/middleware/" class="external-link" target="_blank">Starlette's Middleware docs</a> and the <a href="https://github.com/florimondmanca/awesome-asgi" class="external-link" target="_blank">ASGI Awesome List</a>.

docs/en/docs/advanced/nosql-databases.md

@@ -1,6 +1,8 @@
+# NoSQL (Distributed / Big Data) Databases
+
 **FastAPI** can also be integrated with any <abbr title="Distributed database (Big Data), also 'Not Only SQL'">NoSQL</abbr>.
 
-Here we'll see an example using **<a href="https://www.couchbase.com/" target="_blank">Couchbase</a>**, a <abbr title="Document here refers to a JSON object (a dict), with keys and values, and those values can also be other JSON objects, arrays (lists), numbers, strings, booleans, etc.">document</abbr> based NoSQL database.
+Here we'll see an example using **<a href="https://www.couchbase.com/" class="external-link" target="_blank">Couchbase</a>**, a <abbr title="Document here refers to a JSON object (a dict), with keys and values, and those values can also be other JSON objects, arrays (lists), numbers, strings, booleans, etc.">document</abbr> based NoSQL database.
 
 You can adapt it to any other NoSQL database like:
 
@@ -11,14 +13,14 @@ You can adapt it to any other NoSQL database like:
 * **ElasticSearch**, etc.
 
 !!! tip
-    There is an official project generator with **FastAPI** and **Couchbase**, all based on **Docker**, including a frontend and more tools: <a href="https://github.com/tiangolo/full-stack-fastapi-couchbase" target="_blank">https://github.com/tiangolo/full-stack-fastapi-couchbase</a>
+    There is an official project generator with **FastAPI** and **Couchbase**, all based on **Docker**, including a frontend and more tools: <a href="https://github.com/tiangolo/full-stack-fastapi-couchbase" class="external-link" target="_blank">https://github.com/tiangolo/full-stack-fastapi-couchbase</a>
 
 ## Import Couchbase components
 
 For now, don't pay attention to the rest, only the imports:
 
 ```Python hl_lines="6 7 8"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
 ## Define a constant to use as a "document type"
@@ -28,7 +30,7 @@ We will use it later as a fixed field `type` in our documents.
 This is not required by Couchbase, but is a good practice that will help you afterwards.
 
 ```Python hl_lines="10"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
 ## Add a function to get a `Bucket`
@@ -53,7 +55,7 @@ This utility function will:
 * Return it.
 
 ```Python hl_lines="13 14 15 16 17 18 19 20 21 22"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
 ## Create Pydantic models
@@ -65,10 +67,10 @@ As **Couchbase** "documents" are actually just "JSON objects", we can model them
 First, let's create a `User` model:
 
 ```Python hl_lines="25 26 27 28 29"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
-We will use this model in our path operation function, so, we don't include in it the `hashed_password`.
+We will use this model in our *path operation function*, so, we don't include in it the `hashed_password`.
 
 ### `UserInDB` model
 
@@ -79,14 +81,13 @@ This will have the data that is actually stored in the database.
 We don't create it as a subclass of Pydantic's `BaseModel` but as a subclass of our own `User`, because it will have all the attributes in `User` plus a couple more:
 
 ```Python hl_lines="32 33 34"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
 !!! note
     Notice that we have a `hashed_password` and a `type` field that will be stored in the database.
-    
-    But it is not part of the general `User` model (the one we will return in the path operation).
 
+    But it is not part of the general `User` model (the one we will return in the *path operation*).
 
 ## Get the user
 
@@ -97,21 +98,21 @@ Now create a function that will:
 * Get the document with that ID.
 * Put the contents of the document in a `UserInDB` model.
 
-By creating a function that is only dedicated to getting your user from a `username` (or any other parameter) independent of your path operation function, you can more easily re-use it in multiple parts and also add <abbr title="Automated test, written in code, that checks if another piece of code is working correctly.">unit tests</abbr> for it:
+By creating a function that is only dedicated to getting your user from a `username` (or any other parameter) independent of your *path operation function*, you can more easily re-use it in multiple parts and also add <abbr title="Automated test, written in code, that checks if another piece of code is working correctly.">unit tests</abbr> for it:
 
 ```Python hl_lines="37 38 39 40 41 42 43"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
 ### f-strings
-    
-If you are not familiar with the `f"userprofile::{username}"`, it is a Python "<a href="https://docs.python.org/3/glossary.html#term-f-string" target="_blank">f-string</a>".
+
+If you are not familiar with the `f"userprofile::{username}"`, it is a Python "<a href="https://docs.python.org/3/glossary.html#term-f-string" class="external-link" target="_blank">f-string</a>".
 
 Any variable that is put inside of `{}` in an f-string will be expanded / injected in the string.
 
 ### `dict` unpacking
 
-If you are not familiar with the `UserInDB(**result.value)`, <a href="https://docs.python.org/3/glossary.html#term-argument" target="_blank">it is using `dict` "unpacking"</a>.
+If you are not familiar with the `UserInDB(**result.value)`, <a href="https://docs.python.org/3/glossary.html#term-argument" class="external-link" target="_blank">it is using `dict` "unpacking"</a>.
 
 It will take the `dict` at `result.value`, and take each of its keys and values and pass them as key-values to `UserInDB` as keyword arguments.
 
@@ -135,17 +136,17 @@ UserInDB(username="johndoe", hashed_password="some_hash")
 ### Create the `FastAPI` app
 
 ```Python hl_lines="47"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
-### Create the path operation function
+### Create the *path operation function*
 
-As our code is calling Couchbase and we are not using the <a href="https://docs.couchbase.com/python-sdk/2.5/async-programming.html#asyncio-python-3-5" target="_blank">experimental Python <code>await</code> support</a>, we should declare our function with normal `def` instead of `async def`.
+As our code is calling Couchbase and we are not using the <a href="https://docs.couchbase.com/python-sdk/2.5/async-programming.html#asyncio-python-3-5" class="external-link" target="_blank">experimental Python <code>await</code> support</a>, we should declare our function with normal `def` instead of `async def`.
 
 Also, Couchbase recommends not using a single `Bucket` object in multiple "<abbr title="A sequence of code being executed by the program, while at the same time, or at intervals, there can be others being executed too.">thread</abbr>s", so, we can get just get the bucket directly and pass it to our utility functions:
 
 ```Python hl_lines="50 51 52 53 54"
-{!./src/nosql_databases/tutorial001.py!}
+{!../../../docs_src/nosql_databases/tutorial001.py!}
 ```
 
 ## Recap

docs/en/docs/advanced/openapi-callbacks.md

@@ -1,3 +1,5 @@
+# OpenAPI Callbacks
+
 You could create an API with a *path operation* that could trigger a request to an *external API* created by someone else (probably the same developer that would be *using* your API).
 
 The process that happens when your API app calls the *external API* is named a "callback". Because the software that the external developer wrote sends a request to your API and then your API *calls back*, sending a request to an *external API* (that was probably created by the same developer).
@@ -30,11 +32,11 @@ It will have a *path operation* that will receive an `Invoice` body, and a query
 This part is pretty normal, most of the code is probably already familiar to you:
 
 ```Python hl_lines="8 9 10 11 12  34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53"
-{!./src/openapi_callbacks/tutorial001.py!}
+{!../../../docs_src/openapi_callbacks/tutorial001.py!}
 ```
 
 !!! tip
-    The `callback_url` query parameter uses a Pydantic <a href="https://pydantic-docs.helpmanual.io/usage/types/#urls" target="_blank">URL</a> type.
+    The `callback_url` query parameter uses a Pydantic <a href="https://pydantic-docs.helpmanual.io/usage/types/#urls" class="external-link" target="_blank">URL</a> type.
 
 The only new thing is the `callbacks=messages_callback_router.routes` as an argument to the *path operation decorator*. We'll see what that is next.
 
@@ -62,7 +64,7 @@ This example doesn't implement the callback itself (that could be just a line of
 !!! tip
     The actual callback is just an HTTP request.
 
-    When implementing the callback yourself, you could use something like <a href="https://www.encode.io/httpx/" target="_blank">HTTPX</a> or <a href="https://requests.readthedocs.io/" target="_blank">Requests</a>.
+    When implementing the callback yourself, you could use something like <a href="https://www.encode.io/httpx/" class="external-link" target="_blank">HTTPX</a> or <a href="https://requests.readthedocs.io/" class="external-link" target="_blank">Requests</a>.
 
 ## Write the callback documentation code
 
@@ -91,7 +93,7 @@ Because of that, you need to declare what will be the `default_response_class`,
     But as we are never calling `app.include_router(some_router)`, we need to set the `default_response_class` during creation of the `APIRouter`.
 
 ```Python hl_lines="3 24"
-{!./src/openapi_callbacks/tutorial001.py!}
+{!../../../docs_src/openapi_callbacks/tutorial001.py!}
 ```
 
 ### Create the callback *path operation*
@@ -104,17 +106,17 @@ It should look just like a normal FastAPI *path operation*:
 * And it could also have a declaration of the response it should return, e.g. `response_model=InvoiceEventReceived`.
 
 ```Python hl_lines="15 16 17  20 21  27 28 29 30 31"
-{!./src/openapi_callbacks/tutorial001.py!}
+{!../../../docs_src/openapi_callbacks/tutorial001.py!}
 ```
 
 There are 2 main differences from a normal *path operation*:
 
 * It doesn't need to have any actual code, because your app will never call this code. It's only used to document the *external API*. So, the function could just have `pass`.
-* The *path* can contain an <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#key-expression" target="_blank">OpenAPI 3 expression</a> (see more below) where it can use variables with parameters and parts of the original request sent to *your API*.
+* The *path* can contain an <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#key-expression" class="external-link" target="_blank">OpenAPI 3 expression</a> (see more below) where it can use variables with parameters and parts of the original request sent to *your API*.
 
 ### The callback path expression
 
-The callback *path* can have an <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#key-expression" target="_blank">OpenAPI 3 expression</a> that can contain parts of the original request sent to *your API*.
+The callback *path* can have an <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#key-expression" class="external-link" target="_blank">OpenAPI 3 expression</a> that can contain parts of the original request sent to *your API*.
 
 In this case, it's the `str`:
 
@@ -171,7 +173,7 @@ At this point you have the *callback path operation(s)* needed (the one(s) that
 Now use the parameter `callbacks` in *your API's path operation decorator* to pass the attribute `.routes` (that's actually just a `list` of routes/*path operations*) from that callback router:
 
 ```Python hl_lines="34"
-{!./src/openapi_callbacks/tutorial001.py!}
+{!../../../docs_src/openapi_callbacks/tutorial001.py!}
 ```
 
 !!! tip
@@ -179,7 +181,7 @@ Now use the parameter `callbacks` in *your API's path operation decorator* to pa
 
 ### Check the docs
 
-Now you can start your app with Uvicorn and go to <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>.
+Now you can start your app with Uvicorn and go to <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.
 
 You will see your docs including a "Callback" section for your *path operation* that shows how the *external API* should look like:
 

docs/en/docs/advanced/path-operation-advanced-configuration.md

@@ -1,14 +1,16 @@
+# Path Operation Advanced Configuration
+
 ## OpenAPI operationId
 
-!!! danger
+!!! warning
     If you are not an "expert" in OpenAPI, you probably don't need this.
 
-You can set the OpenAPI `operationId` to be used in your path operation with the parameter `operation_id`.
+You can set the OpenAPI `operationId` to be used in your *path operation* with the parameter `operation_id`.
 
 You would have to make sure that it is unique for each operation.
 
 ```Python hl_lines="6"
-{!./src/path_operation_advanced_configuration/tutorial001.py!}
+{!../../../docs_src/path_operation_advanced_configuration/tutorial001.py!}
 ```
 
 ### Using the *path operation function* name as the operationId
@@ -18,7 +20,7 @@ If you want to use your APIs' function names as `operationId`s, you can iterate
 You should do it after adding all your *path operations*.
 
 ```Python hl_lines="2 12 13 14 15 16 17 18 19 20 21 24"
-{!./src/path_operation_advanced_configuration/tutorial002.py!}
+{!../../../docs_src/path_operation_advanced_configuration/tutorial002.py!}
 ```
 
 !!! tip
@@ -31,10 +33,10 @@ You should do it after adding all your *path operations*.
 
 ## Exclude from OpenAPI
 
-To exclude a path operation from the generated OpenAPI schema (and thus, from the automatic documentation systems), use the parameter `include_in_schema` and set it to `False`;
+To exclude a *path operation* from the generated OpenAPI schema (and thus, from the automatic documentation systems), use the parameter `include_in_schema` and set it to `False`;
 
 ```Python hl_lines="6"
-{!./src/path_operation_advanced_configuration/tutorial003.py!}
+{!../../../docs_src/path_operation_advanced_configuration/tutorial003.py!}
 ```
 
 ## Advanced description from docstring
@@ -46,5 +48,5 @@ Adding an `\f` (an escaped "form feed" character) causes **FastAPI** to truncate
 It won't show up in the documentation, but other tools (such as Sphinx) will be able to use the rest.
 
 ```Python hl_lines="19 20 21 22 23 24 25 26 27 28 29"
-{!./src/path_operation_advanced_configuration/tutorial004.py!}
+{!../../../docs_src/path_operation_advanced_configuration/tutorial004.py!}
 ```

docs/en/docs/advanced/response-change-status-code.md

@@ -1,4 +1,6 @@
-You probably read before that you can set a <a href="https://fastapi.tiangolo.com/tutorial/response-status-code/" target="_blank">default Response Status Code</a>.
+# Response - Change Status Code
+
+You probably read before that you can set a default [Response Status Code](../tutorial/response-status-code.md){.internal-link target=_blank}.
 
 But in some cases you need to return a different status code than the default.
 
@@ -18,8 +20,8 @@ You can declare a parameter of type `Response` in your *path operation function*
 
 And then you can set the `status_code` in that *temporal* response object.
 
-```Python hl_lines="2 11 14"
-{!./src/response_change_status_code/tutorial001.py!}
+```Python hl_lines="1  9  12"
+{!../../../docs_src/response_change_status_code/tutorial001.py!}
 ```
 
 And then you can return any object you need, as you normally would (a `dict`, a database model, etc).

docs/en/docs/advanced/response-cookies.md

@@ -1,11 +1,13 @@
+# Response Cookies
+
 ## Use a `Response` parameter
 
-You can declare a parameter of type `Response` in your *path operation function*, the same way you can declare a `Request` parameter.
+You can declare a parameter of type `Response` in your *path operation function*.
 
-And then you can set headers in that *temporal* response object.
+And then you can set cookies in that *temporal* response object.
 
-```Python hl_lines="2 8 9"
-{!./src/response_cookies/tutorial002.py!}
+```Python hl_lines="1  8 9"
+{!../../../docs_src/response_cookies/tutorial002.py!}
 ```
 
 And then you can return any object you need, as you normally would (a `dict`, a database model, etc).
@@ -20,16 +22,16 @@ You can also declare the `Response` parameter in dependencies, and set cookies (
 
 You can also create cookies when returning a `Response` directly in your code.
 
-To do that, you can create a response as described in <a href="https://fastapi.tiangolo.com/tutorial/response-directly/" target="_blank">Return a Response directly</a>.
+To do that, you can create a response as described in [Return a Response Directly](response-directly.md){.internal-link target=_blank}.
 
 Then set Cookies in it, and then return it:
 
 ```Python hl_lines="10 11 12"
-{!./src/response_cookies/tutorial001.py!}
+{!../../../docs_src/response_cookies/tutorial001.py!}
 ```
 
 !!! tip
-    Have in mind that if you return a response directly instead of using the `Response` parameter, FastAPI will return it directly. 
+    Have in mind that if you return a response directly instead of using the `Response` parameter, FastAPI will return it directly.
 
     So, you will have to make sure your data is of the correct type. E.g. it is compatible with JSON, if you are returning a `JSONResponse`.
 
@@ -37,4 +39,11 @@ Then set Cookies in it, and then return it:
 
 ### More info
 
-To see all the available parameters and options, check the <a href="https://www.starlette.io/responses/#set-cookie" target="_blank">documentation in Starlette</a>.
+!!! note "Technical Details"
+    You could also use `from starlette.responses import Response` or `from starlette.responses import JSONResponse`.
+
+    **FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.
+
+    And as the `Response` can be used frequently to set headers and cookies, **FastAPI** also provides it at `fastapi.Response`.
+
+To see all the available parameters and options, check the <a href="https://www.starlette.io/responses/#set-cookie" class="external-link" target="_blank">documentation in Starlette</a>.

docs/en/docs/advanced/response-directly.md

@@ -1,21 +1,23 @@
+# Return a Response Directly
+
 When you create a **FastAPI** *path operation* you can normally return any data from it: a `dict`, a `list`, a Pydantic model, a database model, etc.
 
-By default, **FastAPI** would automatically convert that return value to JSON using the <a href="https://fastapi.tiangolo.com/tutorial/encoder/" target="_blank">`jsonable_encoder`</a>.
+By default, **FastAPI** would automatically convert that return value to JSON using the `jsonable_encoder` explained in [JSON Compatible Encoder](../tutorial/encoder.md){.internal-link target=_blank}.
 
-Then, behind the scenes, it would put that JSON-compatible data (e.g. a `dict`) inside of a Starlette `JSONResponse` that would be used to send the response to the client.
+Then, behind the scenes, it would put that JSON-compatible data (e.g. a `dict`) inside of a `JSONResponse` that would be used to send the response to the client.
 
 But you can return a `JSONResponse` directly from your *path operations*.
 
 It might be useful, for example, to return custom headers or cookies.
 
-## Starlette `Response`
+## Return a `Response`
 
-In fact, you can return any <a href="https://www.starlette.io/responses/" target="_blank">Starlette `Response`</a> or any sub-class of it.
+In fact, you can return any `Response` or any sub-class of it.
 
 !!! tip
     `JSONResponse` itself is a sub-class of `Response`.
 
-And when you return a Starlette `Response`, **FastAPI** will pass it directly.
+And when you return a `Response`, **FastAPI** will pass it directly.
 
 It won't do any data conversion with Pydantic models, it won't convert the contents to any type, etc.
 
@@ -30,11 +32,13 @@ For example, you cannot put a Pydantic model in a `JSONResponse` without first c
 For those cases, you can use the `jsonable_encoder` to convert your data before passing it to a response:
 
 ```Python hl_lines="4 6 20 21"
-{!./src/response_directly/tutorial001.py!}
+{!../../../docs_src/response_directly/tutorial001.py!}
 ```
 
-!!! note
-    Notice that you import it directly from `starlette.responses`, not from `fastapi`.
+!!! note "Technical Details"
+    You could also use `from starlette.responses import JSONResponse`.
+
+    **FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.
 
 ## Returning a custom `Response`
 
@@ -42,22 +46,18 @@ The example above shows all the parts you need, but it's not very useful yet, as
 
 Now, let's see how you could use that to return a custom response.
 
-Let's say you want to return a response that is not available in the default <a href="https://www.starlette.io/responses/" target="_blank">Starlette `Response`s</a>.
+Let's say that you want to return an <a href="https://en.wikipedia.org/wiki/XML" class="external-link" target="_blank">XML</a> response.
 
-Let's say that you want to return <a href="https://en.wikipedia.org/wiki/XML" target="_blank">XML</a>.
+You could put your XML content in a string, put it in a `Response`, and return it:
 
-You could put your XML content in a string, put it in a Starlette Response, and return it:
-
-```Python hl_lines="2 20"
-{!./src/response_directly/tutorial002.py!}
+```Python hl_lines="1  18"
+{!../../../docs_src/response_directly/tutorial002.py!}
 ```
 
 ## Notes
 
 When you return a `Response` directly its data is not validated, converted (serialized), nor documented automatically.
 
-But you can still <a href="https://fastapi.tiangolo.com/tutorial/additional-responses/" target="_blank">document it</a>.
+But you can still document it as described in [Additional Responses in OpenAPI](additional-responses.md){.internal-link target=_blank}.
 
-In the next sections you will see how to use/declare these custom `Response`s while still having automatic data conversion, documentation, etc.
-
-You will also see how to use them to set response Headers and Cookies.
+You can see in later sections how to use/declare these custom `Response`s while still having automatic data conversion, documentation, etc.

docs/en/docs/advanced/response-headers.md

@@ -0,0 +1,42 @@
+# Response Headers
+
+## Use a `Response` parameter
+
+You can declare a parameter of type `Response` in your *path operation function* (as you can do for cookies).
+
+And then you can set headers in that *temporal* response object.
+
+```Python hl_lines="1  7 8"
+{!../../../docs_src/response_headers/tutorial002.py!}
+```
+
+And then you can return any object you need, as you normally would (a `dict`, a database model, etc).
+
+And if you declared a `response_model`, it will still be used to filter and convert the object you returned.
+
+**FastAPI** will use that *temporal* response to extract the headers (also cookies and status code), and will put them in the final response that contains the value you returned, filtered by any `response_model`.
+
+You can also declare the `Response` parameter in dependencies, and set headers (and cookies) in them.
+
+## Return a `Response` directly
+
+You can also add headers when you return a `Response` directly.
+
+Create a response as described in [Return a Response Directly](response-directly.md){.internal-link target=_blank} and pass the headers as an additional parameter:
+
+```Python hl_lines="10 11 12"
+{!../../../docs_src/response_headers/tutorial001.py!}
+```
+
+!!! note "Technical Details"
+    You could also use `from starlette.responses import Response` or `from starlette.responses import JSONResponse`.
+
+    **FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.
+
+    And as the `Response` can be used frequently to set headers and cookies, **FastAPI** also provides it at `fastapi.Response`.
+
+## Custom Headers
+
+Have in mind that custom proprietary headers can be added <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">using the 'X-' prefix</a>.
+
+But if you have custom headers that you want a client in a browser to be able to see, you need to add them to your CORS configurations (read more in [CORS (Cross-Origin Resource Sharing)](../tutorial/cors.md){.internal-link target=_blank}), using the parameter `expose_headers` documented in <a href="https://www.starlette.io/middleware/#corsmiddleware" class="external-link" target="_blank">Starlette's CORS docs</a>.

docs/en/docs/advanced/security/http-basic-auth.md

@@ -0,0 +1,107 @@
+# HTTP Basic Auth
+
+For the simplest cases, you can use HTTP Basic Auth.
+
+In HTTP Basic Auth, the application expects a header that contains a username and a password.
+
+If it doesn't receive it, it returns an HTTP 401 "Unauthorized" error.
+
+And returns a header `WWW-Authenticate` with a value of `Basic`, and an optional `realm` parameter.
+
+That tells the browser to show the integrated prompt for a username and password.
+
+Then, when you type that username and password, the browser sends them in the header automatically.
+
+## Simple HTTP Basic Auth
+
+* Import `HTTPBasic` and `HTTPBasicCredentials`.
+* Create a "`security` scheme" using `HTTPBasic`.
+* Use that `security` with a dependency in your *path operation*.
+* It returns an object of type `HTTPBasicCredentials`:
+    * It contains the `username` and `password` sent.
+
+```Python hl_lines="2 6 10"
+{!../../../docs_src/security/tutorial006.py!}
+```
+
+When you try to open the URL for the first time (or click the "Execute" button in the docs) the browser will ask you for your username and password:
+
+<img src="/img/tutorial/security/image12.png">
+
+## Check the username
+
+Here's a more complete example.
+
+Use a dependency to check if the username and password are correct.
+
+For this, use the Python standard module <a href="https://docs.python.org/3/library/secrets.html" class="external-link" target="_blank">`secrets`</a> to check the username and password:
+
+```Python hl_lines="1  11 12 13"
+{!../../../docs_src/security/tutorial007.py!}
+```
+
+This will ensure that `credentials.username` is `"stanleyjobson"`, and that `credentials.password` is `"swordfish"`. This would be similar to:
+
+```Python
+if not (credentials.username == "stanleyjobson") or not (credentials.password == "swordfish"):
+    # Return some error
+    ...
+```
+
+But by using the `secrets.compare_digest()` it will be secure against a type of attacks called "timing attacks".
+
+### Timing Attacks
+
+But what's a "timing attack"?
+
+Let's imagine an attacker is trying to guess the username and password.
+
+And that attacker sends a request with a username `johndoe` and a password `love123`.
+
+Then the Python code in your application would be equivalent to something like:
+
+```Python
+if "johndoe" == "stanleyjobson" and "love123" == "swordfish":
+    ...
+```
+
+But right at the moment Python compares the first `j` in `johndoe` to the first `s` in `stanleyjobson`, it will return `False`, because it already knows that those two strings are not the same, thinking that "there's no need to waste more computation comparing the rest of the letters". And your application will say "incorrect user or password".
+
+But then the attacker tries with username `stanleyjobsox` and password `love123`.
+
+And your application code does something like:
+
+```Python
+if "stanleyjobsox" == "stanleyjobson" and "love123" == "swordfish":
+    ...
+```
+
+Python will have to compare the whole `stanleyjobso` in both `stanleyjobsox` and `stanleyjobson` before realizing that both strings are not the same. So it will take some extra microseconds to reply back "incorrect user or password".
+
+#### The time to answer helps the attacker
+
+At that point, by noticing that the server took some microseconds longer to send the "incorrect user or password" response, the attacker will know that she/he got _something_ right, some of the initial letters were right.
+
+And then she/he can try again knowing that it's probably something more similar to `stanleyjobsox` than to `johndoe`.
+
+#### A "professional" attack
+
+Of course, the attacker would not try all this by hand, she/he would write a program to do it, possibly with thousands or millions of tests per second. And would get just one extra correct letter at a time.
+
+But doing that, in some minutes or hours the attacker would have guessed the correct username and password, with the "help" of our application, just using the time taken to answer.
+
+#### Fix it with `secrets.compare_digest()`
+
+But in our code we are actually using `secrets.compare_digest()`.
+
+In short, it will take the same time to compare `stanleyjobsox` to `stanleyjobson` than it takes to compare `johndoe` to `stanleyjobson`. And the same for the password.
+
+That way, using `secrets.compare_digest()` in your application code, it will be safe against this whole range of security attacks.
+
+### Return the error
+
+After detecting that the credentials are incorrect, return an `HTTPException` with a status code 401 (the same returned when no credentials are provided) and add the header `WWW-Authenticate` to make the browser show the login prompt again:
+
+```Python hl_lines="15 16 17 18 19"
+{!../../../docs_src/security/tutorial007.py!}
+```

docs/en/docs/advanced/security/index.md

@@ -0,0 +1,16 @@
+# Advanced Security - Intro
+
+## Additional Features
+
+There are some extra features to handle security apart from the ones covered in the [Tutorial - User Guide: Security](../../tutorial/security/){.internal-link target=_blank}.
+
+!!! tip
+    The next sections are **not necessarily "advanced"**.
+
+    And it's possible that for your use case, the solution is in one of them.
+
+## Read the Tutorial first
+
+The next sections assume you already read the main [Tutorial - User Guide: Security](../../tutorial/security/){.internal-link target=_blank}.
+
+They are all based on the same concepts, but allow some extra functionalities.

docs/en/docs/advanced/security/oauth2-scopes.md

@@ -1,3 +1,5 @@
+# OAuth2 scopes
+
 You can use OAuth2 scopes directly with **FastAPI**, they are integrated to work seamlessly.
 
 This would allow you to have a more fine-grained permission system, following the OAuth2 standard, integrated into your OpenAPI application (and the API docs).
@@ -29,16 +31,33 @@ The content of each of these strings can have any format, but should not contain
 
 These scopes represent "permissions".
 
-In OpenAPI (e.g. the API docs), you can define "security schemes", the same as you saw in the previous sections.
+In OpenAPI (e.g. the API docs), you can define "security schemes".
 
 When one of these security schemes uses OAuth2, you can also declare and use scopes.
 
+Each "scope" is just a string (without spaces).
+
+They are normally used to declare specific security permissions, for example:
+
+* `users:read` or `users:write` are common examples.
+* `instagram_basic` is used by Facebook / Instagram.
+* `https://www.googleapis.com/auth/drive` is used by Google.
+
+!!! info
+    In OAuth2 a "scope" is just a string that declares a specific permission required.
+
+    It doesn't matter if it has other characters like `:` or if it is a URL.
+    
+    Those details are implementation specific.
+
+    For OAuth2 they are just strings.
+
 ## Global view
 
-First, let's quickly see the parts that change from the previous section about OAuth2 and JWT. Now using OAuth2 scopes:
+First, let's quickly see the parts that change from the examples in the main **Tutorial - User Guide** for [OAuth2 with Password (and hashing), Bearer with JWT tokens](../../tutorial/security/oauth2-jwt.md){.internal-link target=_blank}. Now using OAuth2 scopes:
 
-```Python hl_lines="2 5 9 13 48 66 107 109 110 111 112 113 114 115 116 117 123 124 125 126 130 131 132 133 134 135 136 141 155"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="2  5  9  13  47  65  106  108 109 110 111 112 113 114 115 116  122 123 124 125  129 130 131 132 133 134 135  140  154"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 Now let's review those changes step by step.
@@ -49,8 +68,8 @@ The first change is that now we are declaring the OAuth2 security scheme with tw
 
 The `scopes` parameter receives a `dict` with each scope as a key and the description as the value:
 
-```Python hl_lines="64 65 66 67"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="63 64 65 66"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 Because we are now declaring those scopes, they will show up in the API docs when you log-in/authorize.
@@ -74,8 +93,8 @@ And we return the scopes as part of the JWT token.
 
     But in your application, for security, you should make sure you only add the scopes that the user is actually able to have, or the ones you have predefined.
 
-```Python hl_lines="156"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="155"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 ## Declare scopes in *path operations* and dependencies
@@ -99,8 +118,8 @@ In this case, it requires the scope `me` (it could require more than one scope).
     
     We are doing it here to demonstrate how **FastAPI** handles scopes declared at different levels.
 
-```Python hl_lines="5 141 168"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="5  140  167"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 !!! info "Technical Details"
@@ -108,7 +127,7 @@ In this case, it requires the scope `me` (it could require more than one scope).
 
     But by using `Security` instead of `Depends`, **FastAPI** will know that it can declare security scopes, use them internally, and document the API with OpenAPI.
 
-    But when you import `Query`, `Path`, `Depends`, `Security` and others from `fastapi`, <a href="https://fastapi.tiangolo.com/tutorial/path-params-numeric-validations/#recap" target="_blank">those are actually functions that return classes of the same name</a>.
+    But when you import `Query`, `Path`, `Depends`, `Security` and others from `fastapi`, those are actually functions that return special classes.
 
 ## Use `SecurityScopes`
 
@@ -124,8 +143,8 @@ We also declare a special parameter of type `SecurityScopes`, imported from `fas
 
 This `SecurityScopes` class is similar to `Request` (`Request` was used to get the request object directly).
 
-```Python hl_lines="9 107"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="9  106"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 ## Use the `scopes`
@@ -140,8 +159,8 @@ We create an `HTTPException` that we can re-use (`raise`) later at several point
 
 In this exception, we include the scopes required (if any) as a string separated by spaces (using `scope_str`). We put that string containing the scopes in in the `WWW-Authenticate` header (this is part of the spec).
 
-```Python hl_lines="107 109 110 111 112 113 114 115 116 117"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="106  108 109 110 111 112 113 114 115 116"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 ## Verify the `username` and data shape
@@ -158,8 +177,8 @@ Instead of, for example, a `dict`, or something else, as it could break the appl
 
 We also verify that we have a user with that username, and if not, we raise that same exception we created before.
 
-```Python hl_lines="48 118 119 120 121 122 123 124 125 126 127 128 129"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="47  117 118 119 120 121 122 123 124 125 126 127 128"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 ## Verify the `scopes`
@@ -168,8 +187,8 @@ We now verify that all the scopes required, by this dependency and all the depen
 
 For this, we use `security_scopes.scopes`, that contains a `list` with all these scopes as `str`.
 
-```Python hl_lines="130 131 132 133 134 135 136"
-{!./src/security/tutorial005.py!}
+```Python hl_lines="129 130 131 132 133 134 135"
+{!../../../docs_src/security/tutorial005.py!}
 ```
 
 ## Dependency tree and scopes
@@ -200,7 +219,7 @@ Here's how the hierarchy of dependencies and scopes looks like:
 !!! tip
     The important and "magic" thing here is that `get_current_user` will have a different list of `scopes` to check for each *path operation*.
 
-    All depending on the `scopes` declared in each *path operation* and each dependency in the dependency tree for that specific path operation.
+    All depending on the `scopes` declared in each *path operation* and each dependency in the dependency tree for that specific *path operation*.
 
 ## More details about `SecurityScopes`
 
@@ -210,7 +229,7 @@ It will always have the security scopes declared in the current `Security` depen
 
 Because the `SecurityScopes` will have all the scopes declared by dependants, you can use it to verify that a token has the required scopes in a central dependency function, and then declare different scope requirements in different *path operations*.
 
-They will be checked independently for each path operation.
+They will be checked independently for each *path operation*.
 
 ## Check it
 
@@ -247,4 +266,4 @@ The most secure is the code flow, but is more complex to implement as it require
 
 ## `Security` in decorator `dependencies`
 
-The same way you can define a `list` of <a href="https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-in-path-operation-decorators/" target="_blank">`Depends` in the decorator's `dependencies` parameter</a>, you could also use `Security` with `scopes` there.
+The same way you can define a `list` of `Depends` in the decorator's `dependencies` parameter (as explained in [Dependencies in path operation decorators](../../tutorial/dependencies/dependencies-in-path-operation-decorators.md){.internal-link target=_blank}), you could also use `Security` with `scopes` there.

docs/en/docs/advanced/settings.md

@@ -0,0 +1,382 @@
+# Settings and Environment Variables
+
+In many cases your application could need some external settings or configurations, for example secret keys, database credentials, credentials for email services, etc.
+
+Most of these settings are variable (can change), like database URLs. And many could be sensitive, like secrets.
+
+For this reason it's common to provide them in environment variables that are read by the application.
+
+## Environment Variables
+
+!!! tip
+    If you already know what "environment variables" are and how to use them, feel free to skip to the next section below.
+
+An <a href="https://en.wikipedia.org/wiki/Environment_variable" class="external-link" target="_blank">environment variable</a> (also known as "env var") is a variable that lives outside of the Python code, in the operating system, and could be read by your Python code (or by other programs as well).
+
+You can create and use environment variables in the shell, without needing Python:
+
+=== "Linux, macOS, Windows Bash"
+
+    <div class="termy">
+
+    ```console
+    // You could create an env var MY_NAME with
+    $ export MY_NAME="Wade Wilson"
+
+    // Then you could use it with other programs, like
+    $ echo "Hello $MY_NAME"
+
+    Hello Wade Wilson
+    ```
+
+    </div>
+
+=== "Windows PowerShell"
+
+    <div class="termy">
+
+    ```console
+    // Create an env var MY_NAME
+    $ $Env:MY_NAME = "Wade Wilson"
+
+    // Use it with other programs, like
+    $ echo "Hello $Env:MY_NAME"
+
+    Hello Wade Wilson
+    ```
+
+    </div>
+
+### Read env vars in Python
+
+You could also create environment variables outside of Python, in the terminal (or with any other method), and then read them in Python.
+
+For example you could have a file `main.py` with:
+
+```Python hl_lines="3"
+import os
+
+name = os.getenv("MY_NAME", "World")
+print(f"Hello {name} from Python")
+```
+
+!!! tip
+    The second argument to <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is the default value to return.
+
+    If not provided, it's `None` by default, here we provide `"World"` as the default value to use.
+
+Then you could call that Python program:
+
+<div class="termy">
+
+```console
+// Here we don't set the env var yet
+$ python main.py
+
+// As we didn't set the env var, we get the default value
+
+Hello World from Python
+
+// But if we create an environment variable first
+$ export MY_NAME="Wade Wilson"
+
+// And then call the program again
+$ python main.py
+
+// Now it can read the environment variable
+
+Hello Wade Wilson from Python
+```
+
+</div>
+
+As environment variables can be set outside of the code, but can be read by the code, and don't have to be stored (committed to `git`) with the rest of the files, it's common to use them for configurations or settings.
+
+You can also create an environment variable only for a specific program invocation, that is only available to that program, and only for its duration.
+
+To do that, create it right before the program itself, on the same line:
+
+<div class="termy">
+
+```console
+// Create an env var MY_NAME in line for this program call
+$ MY_NAME="Wade Wilson" python main.py
+
+// Now it can read the environment variable
+
+Hello Wade Wilson from Python
+
+// The env var no longer exists afterwards
+$ python main.py
+
+Hello World from Python
+```
+
+</div>
+
+!!! tip
+    You can read more about it at <a href="https://12factor.net/config" class="external-link" target="_blank">The Twelve-Factor App: Config</a>.
+
+### Types and validation
+
+These environment variables can only handle text strings, as they are external to Python and have to be compatible with other programs and the rest of the system (and even with different operating systems, as Linux, Windows, macOS).
+
+That means that any value read in Python from an environment variable will be a `str`, and any conversion to a different type or validation has to be done in code.
+
+## Pydantic `Settings`
+
+Fortunately, Pydantic provides a great utility to handle these settings coming from environment variables with <a href="https://pydantic-docs.helpmanual.io/usage/settings/" class="external-link" target="_blank">Pydantic: Settings management</a>.
+
+### Create the `Settings` object
+
+Import `BaseSettings` from Pydantic and create a sub-class, very much like with a Pydantic model.
+
+The same way as with Pydantic models, you declare class attributes with type annotations, and possibly default values.
+
+You can use all the same validation features and tools you use for Pydantic models, like different data types and additional validations with `Field()`.
+
+```Python hl_lines="2  5 6 7 8  11"
+{!../../../docs_src/settings/tutorial001.py!}
+```
+
+!!! tip
+    If you want something quick to copy and paste, don't use this example, use the last one below.
+
+Then, when you create an instance of that `Settings` class (in this case, in the `settings` object), Pydantic will read the environment variables in a case-insensitive way, so, an upper-case variable `APP_NAME` will still be read for the attribute `app_name`.
+
+Next it will convert and validate the data. So, when you use that `settings` object, you will have data of the types you declared (e.g. `items_per_user` will be an `int`).
+
+### Use the `settings`
+
+Then you can use the new `settings` object in your application:
+
+```Python hl_lines="18 19 20"
+{!../../../docs_src/settings/tutorial001.py!}
+```
+
+### Run the server
+
+Next, you would run the server passing the configurations as environment variables, for example you could set an `ADMIN_EMAIL` and `APP_NAME` with:
+
+<div class="termy">
+
+```console
+$ ADMIN_EMAIL="deadpool@example.com" APP_NAME="ChimichangApp" uvicorn main:app
+
+<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+```
+
+</div>
+
+!!! tip
+    To set multiple env vars for a single command just separate them with a space, and put them all before the command.
+
+And then the `admin_email` setting would be set to `"deadpool@example.com"`.
+
+The `app_name` would be `"ChimichangApp"`.
+
+And the `items_per_user` would keep its default value of `50`.
+
+## Settings in another module
+
+You could put those settings in another module file as you saw in [Bigger Applications - Multiple Files](../tutorial/bigger-applications.md){.internal-link target=_blank}.
+
+For example, you could have a file `config.py` with:
+
+```Python
+{!../../../docs_src/settings/app01/config.py!}
+```
+
+And then use it in a file `main.py`:
+
+```Python hl_lines="3  11 12 13"
+{!../../../docs_src/settings/app01/main.py!}
+```
+
+!!! tip
+    You would also need a file `__init__.py` as you saw on [Bigger Applications - Multiple Files](../tutorial/bigger-applications.md){.internal-link target=_blank}.
+
+## Settings in a dependency
+
+In some occasions it might be useful to provide the settings from a dependency, instead of having a global object with `settings` that is used everywhere.
+
+This could be especially useful during testing, as it's very easy to override a dependency with your own custom settings.
+
+### The config file
+
+Coming from the previous example, your `config.py` file could look like:
+
+```Python hl_lines="10"
+{!../../../docs_src/settings/app02/config.py!}
+```
+
+Notice that now we don't create a default instance `settings = Settings()`.
+
+### The main app file
+
+Now we create a dependency that returns a new `config.Settings()`.
+
+```Python hl_lines="5  11 12"
+{!../../../docs_src/settings/app02/main.py!}
+```
+
+!!! tip
+    We'll discuss the `@lru_cache()` in a bit.
+
+    For now you can assume `get_settings()` is a normal function.
+
+And then we can require it from the *path operation function* as a dependency and use it anywhere we need it.
+
+```Python hl_lines="16  18 19 20"
+{!../../../docs_src/settings/app02/main.py!}
+```
+
+### Settings and testing
+
+Then it would be very easy to provide a different settings object during testing by creating a dependency override for `get_settings`:
+
+```Python hl_lines="8 9  12  21"
+{!../../../docs_src/settings/app02/test_main.py!}
+```
+
+In the dependency override we set a new value for the `admin_email` when creating the new `Settings` object, and then we return that new object.
+
+Then we can test that it is used.
+
+## Reading a `.env` file
+
+If you have many settings that possibly change a lot, maybe in different environments, it might be useful to put them on a file and then read them from it as if they were environment variables.
+
+This practice is common enough that it has a name, these environment variables are commonly placed in a file `.env`, and the file is called a "dotenv".
+
+!!! tip
+    A file starting with a dot (`.`) is a hidden file in Unix-like systems, like Linux and macOS.
+
+    But a dotenv file doesn't really have to have that exact filename.
+
+Pydantic has support for reading from these types of files using an external library. You can read more at <a href="https://pydantic-docs.helpmanual.io/usage/settings/#dotenv-env-support" class="external-link" target="_blank">Pydantic Settings: Dotenv (.env) support</a>.
+
+!!! tip
+    For this to work, you need to `pip install python-dotenv`.
+
+### The `.env` file
+
+You could have a `.env` file with:
+
+```bash
+ADMIN_EMAIL="deadpool@example.com"
+APP_NAME="ChimichangApp"
+```
+
+### Read settings from `.env`
+
+And then update your `config.py` with:
+
+```Python hl_lines="9 10"
+{!../../../docs_src/settings/app03/config.py!}
+```
+
+Here we create a class `Config` inside of your Pydantic `Settings` class, and set the `env_file` to the filename with the dotenv file we want to use.
+
+!!! tip
+    The `Config` class is used just for Pydantic configuration. You can read more at <a href="https://pydantic-docs.helpmanual.io/usage/model_config/" class="external-link" target="_blank">Pydantic Model Config</a>
+
+### Creating the `Settings` only once with `lru_cache`
+
+Reading a file from disk is normally a costly (slow) operation, so you probably want to do it only once and then re-use the same settings object, instead of reading it for each request.
+
+But every time we do:
+
+```Python
+config.Settings()
+```
+
+a new `Settings` object would be created, and at creation it would read the `.env` file again.
+
+If the dependency function was just like:
+
+```Python
+def get_settings():
+    return config.Settings()
+```
+
+we would create that object for each request, and we would be reading the `.env` file for each request. ⚠️
+
+But as we are using the `@lru_cache()` decorator on top, the `Settings` object will be created only once, the first time it's called. ✔️
+
+```Python hl_lines="1  10"
+{!../../../docs_src/settings/app03/main.py!}
+```
+
+Then for any subsequent calls of `get_settings()` in the dependencies for the next requests, instead of executing the internal code of `get_settings()` and creating a new `Settings` object, it will return the same object that was returned on the first call, again and again.
+
+#### `lru_cache` Technical Details
+
+`@lru_cache()` modifies the function it decorates to return the same value that was returned the first time, instead of computing it again, executing the code of the function every time.
+
+So, the function below it will be executed once for each combination of arguments. And then the values returned by each of those combinations of arguments will be used again and again whenever the function is called with exactly the same combination of arguments.
+
+For example, if you have a function:
+
+```Python
+@lru_cache()
+def say_hi(name: str, salutation: str = "Ms."):
+    return f"Hello {salutation} {name}"
+```
+
+your program could execute like this:
+
+```mermaid
+sequenceDiagram
+
+participant code as Code
+participant function as say_hi()
+participant execute as Execute function
+
+    rect rgba(0, 255, 0, .1)
+        code ->> function: say_hi(name="Camila")
+        function ->> execute: execute function code
+        execute ->> code: return the result
+    end
+
+    rect rgba(0, 255, 255, .1)
+        code ->> function: say_hi(name="Camila")
+        function ->> code: return stored result
+    end
+
+    rect rgba(0, 255, 0, .1)
+        code ->> function: say_hi(name="Rick")
+        function ->> execute: execute function code
+        execute ->> code: return the result
+    end
+
+    rect rgba(0, 255, 0, .1)
+        code ->> function: say_hi(name="Rick", salutation="Mr.")
+        function ->> execute: execute function code
+        execute ->> code: return the result
+    end
+
+    rect rgba(0, 255, 255, .1)
+        code ->> function: say_hi(name="Rick")
+        function ->> code: return stored result
+    end
+
+    rect rgba(0, 255, 255, .1)
+        code ->> function: say_hi(name="Camila")
+        function ->> code: return stored result
+    end
+```
+
+In the case of our dependency `get_settings()`, the function doesn't even take any arguments, so it always returns the same value.
+
+That way, it behaves almost as if it was just a global variable. But as it uses a dependency function, then we can override it easily for testing.
+
+`@lru_cache()` is part of `functools` which is part of Python's standard library, you can read more about it in the <a href="https://docs.python.org/3/library/functools.html#functools.lru_cache" class="external-link" target="_blank">Python docs for `@lru_cache()`</a>.
+
+## Recap
+
+You can use Pydantic Settings to handle the settings or configurations for your application, with all the power of Pydantic models.
+
+* By using a dependency you can simplify testing.
+* You can use `.env` files with it.
+* Using `@lru_cache()` lets you avoid reading the dotenv file again and again for each request, while allowing you to override it during testing.

docs/en/docs/advanced/sql-databases-peewee.md

@@ -1,11 +1,13 @@
+# SQL (Relational) Databases with Peewee
+
 !!! warning
-    If you are just starting, the <a href="https://fastapi.tiangolo.com/tutorial/sql-databases/" target="_blank">SQLAlchemy tutorial</a> should be enough.
+    If you are just starting, the tutorial [SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank} that uses SQLAlchemy should be enough.
 
     Feel free to skip this.
 
-If you are starting a project from scratch, you are probably better off with <a href="https://fastapi.tiangolo.com/tutorial/sql-databases/" target="_blank">SQLAlchemy ORM</a>, or any other async ORM.
+If you are starting a project from scratch, you are probably better off with SQLAlchemy ORM ([SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank}), or any other async ORM.
 
-If you already have a code base that uses <a href="http://docs.peewee-orm.com/en/latest/" target="_blank">Peewee ORM</a>, you can check here how to use it with **FastAPI**.
+If you already have a code base that uses <a href="http://docs.peewee-orm.com/en/latest/" class="external-link" target="_blank">Peewee ORM</a>, you can check here how to use it with **FastAPI**.
 
 !!! warning "Python 3.7+ required"
     You will need Python 3.7 or above to safely use Peewee with FastAPI.
@@ -23,11 +25,11 @@ But if you need to change some of the defaults, support more than one predefined
 Nevertheless, it's possible to do it, and here you'll see exactly what code you have to add to be able to use Peewee with FastAPI.
 
 !!! note "Technical Details"
-    You can read more about Peewee's stand about async in Python <a href="http://docs.peewee-orm.com/en/latest/peewee/database.html#async-with-gevent" target="_blank">in the docs</a>, <a href="https://github.com/coleifer/peewee/issues/263#issuecomment-517347032" target="_blank">an issue</a>, <a href="https://github.com/coleifer/peewee/pull/2072#issuecomment-563215132" target="_blank">a PR</a>.
+    You can read more about Peewee's stand about async in Python <a href="http://docs.peewee-orm.com/en/latest/peewee/database.html#async-with-gevent" class="external-link" target="_blank">in the docs</a>, <a href="https://github.com/coleifer/peewee/issues/263#issuecomment-517347032" class="external-link" target="_blank">an issue</a>, <a href="https://github.com/coleifer/peewee/pull/2072#issuecomment-563215132" class="external-link" target="_blank">a PR</a>.
 
 ## The same app
 
-We are going to create the same application as in the <a href="https://fastapi.tiangolo.com/tutorial/sql-databases/" target="_blank">SQLAlchemy tutorial</a>.
+We are going to create the same application as in the SQLAlchemy tutorial ([SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank}).
 
 Most of the code is actually the same.
 
@@ -59,8 +61,8 @@ Let's refer to the file `sql_app/database.py`.
 
 Let's first check all the normal Peewee code, create a Peewee database:
 
-```Python hl_lines="3  5  24"
-{!./src/sql_databases_peewee/sql_app/database.py!}
+```Python hl_lines="3  5  22"
+{!../../../docs_src/sql_databases_peewee/sql_app/database.py!}
 ```
 
 !!! tip
@@ -84,11 +86,11 @@ connect_args={"check_same_thread": False}
 
 !!! info "Technical Details"
 
-    Exactly the same technical details as in the <a href="https://fastapi.tiangolo.com/tutorial/sql-databases/#note" target="_blank">SQLAlchemy tutorial</a> apply.
+    Exactly the same technical details as in [SQL (Relational) Databases](../tutorial/sql-databases.md#note){.internal-link target=_blank} apply.
 
 ### Make Peewee async-compatible `PeeweeConnectionState`
 
-The main issue with Peewee and FastAPI is that Peewee relies heavily on <a href="https://docs.python.org/3/library/threading.html#thread-local-data" target="_blank">Python's `threading.local`</a>, and it doesn't have a direct way to override it or let you handle connections/sessions directly (as is done in the SQLAlchemy tutorial).
+The main issue with Peewee and FastAPI is that Peewee relies heavily on <a href="https://docs.python.org/3/library/threading.html#thread-local-data" class="external-link" target="_blank">Python's `threading.local`</a>, and it doesn't have a direct way to override it or let you handle connections/sessions directly (as is done in the SQLAlchemy tutorial).
 
 And `threading.local` is not compatible with the new async features of modern Python.
 
@@ -103,7 +105,7 @@ And `threading.local` is not compatible with the new async features of modern Py
 
 But Python 3.7 and above provide a more advanced alternative to `threading.local`, that can also be used in the places where `threading.local` would be used, but is compatible with the new async features.
 
-We are going to use that. It's called <a href="https://docs.python.org/3/library/contextvars.html" target="_blank">`contextvars`</a>.
+We are going to use that. It's called <a href="https://docs.python.org/3/library/contextvars.html" class="external-link" target="_blank">`contextvars`</a>.
 
 We are going to override the internal parts of Peewee that use `threading.local` and replace them with `contextvars`, with the corresponding updates.
 
@@ -111,8 +113,8 @@ This might seem a bit complex (and it actually is), you don't really need to com
 
 We will create a `PeeweeConnectionState`:
 
-```Python hl_lines="8 9 10 11 12 13 14 15 16 17 18 19 20 21"
-{!./src/sql_databases_peewee/sql_app/database.py!}
+```Python hl_lines="10 11 12 13 14 15 16 17 18 19"
+{!../../../docs_src/sql_databases_peewee/sql_app/database.py!}
 ```
 
 This class inherits from a special internal class used by Peewee.
@@ -132,8 +134,8 @@ So, we need to do some extra tricks to make it work as if it was just using `thr
 
 Now, overwrite the `._state` internal attribute in the Peewee database `db` object using the new `PeeweeConnectionState`:
 
-```Python hl_lines="26"
-{!./src/sql_databases_peewee/sql_app/database.py!}
+```Python hl_lines="24"
+{!../../../docs_src/sql_databases_peewee/sql_app/database.py!}
 ```
 
 !!! tip
@@ -160,7 +162,7 @@ This is the same you would do if you followed the Peewee tutorial and updated th
 Import `db` from `database` (the file `database.py` from above) and use it here.
 
 ```Python hl_lines="3  6 7 8 9 10 11 12  15 16 17 18 19 20 21"
-{!./src/sql_databases_peewee/sql_app/models.py!}
+{!../../../docs_src/sql_databases_peewee/sql_app/models.py!}
 ```
 
 !!! tip
@@ -188,7 +190,7 @@ Now let's check the file `sql_app/schemas.py`.
 Create all the same Pydantic models as in the SQLAlchemy tutorial:
 
 ```Python hl_lines="16 17 18  21 22  25 26 27 28 29 30  34 35  38 39  42 43 44 45 46 47 48"
-{!./src/sql_databases_peewee/sql_app/schemas.py!}
+{!../../../docs_src/sql_databases_peewee/sql_app/schemas.py!}
 ```
 
 !!! tip
@@ -206,14 +208,14 @@ It provides a special custom object of class `ModelSelect`.
 
 It's possible to create a `list` of its items with `list(some_user.items)`.
 
-But the object itself is not a `list`. And it's also not an actual Python <a href="https://docs.python.org/3/glossary.html#term-generator" target="_blank">generator</a>. Because of this, Pydantic doesn't know by default how to convert it to a `list` of Pydantic *models* / schemas.
+But the object itself is not a `list`. And it's also not an actual Python <a href="https://docs.python.org/3/glossary.html#term-generator" class="external-link" target="_blank">generator</a>. Because of this, Pydantic doesn't know by default how to convert it to a `list` of Pydantic *models* / schemas.
 
 But recent versions of Pydantic allow providing a custom class that inherits from `pydantic.utils.GetterDict`, to provide the functionality used when using the `orm_mode = True` to retrieve the values for ORM model attributes.
 
 We are going to create a custom `PeeweeGetterDict` class and use it in all the same Pydantic *models* / schemas that use `orm_mode`:
 
 ```Python hl_lines="3 8 9 10 11 12 13  31  49"
-{!./src/sql_databases_peewee/sql_app/schemas.py!}
+{!../../../docs_src/sql_databases_peewee/sql_app/schemas.py!}
 ```
 
 Here we are checking if the attribute that is being accessed (e.g. `.items` in `some_user.items`) is an instance of `peewee.ModelSelect`.
@@ -234,7 +236,7 @@ Now let's see the file `sql_app/crud.py`.
 Create all the same CRUD utils as in the SQLAlchemy tutorial, all the code is very similar:
 
 ```Python hl_lines="1  4 5  8 9  12 13  16 17 18 19 20  23 24  27 28 29 30"
-{!./src/sql_databases_peewee/sql_app/crud.py!}
+{!../../../docs_src/sql_databases_peewee/sql_app/crud.py!}
 ```
 
 There are some differences with the code for the SQLAlchemy tutorial.
@@ -247,7 +249,7 @@ Aso, when returning several objects, like in `get_users`, we directly call `list
 list(models.User.select())
 ```
 
-This is for the same reason that we had to create a custom `PeeweeGetterDict`. But by returning something that is already a `list` instead of the `peewee.ModelSelect` the `response_model` in the path operation with `List[models.User]` (that we'll see later) will work correctly.
+This is for the same reason that we had to create a custom `PeeweeGetterDict`. But by returning something that is already a `list` instead of the `peewee.ModelSelect` the `response_model` in the *path operation* with `List[models.User]` (that we'll see later) will work correctly.
 
 ## Main **FastAPI** app
 
@@ -257,36 +259,69 @@ And now in the file `sql_app/main.py` let's integrate and use all the other part
 
 In a very simplistic way create the database tables:
 
-```Python hl_lines="8 9 10"
-{!./src/sql_databases_peewee/sql_app/main.py!}
+```Python hl_lines="9 10 11"
+{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
 ```
 
 ### Create a dependency
 
 Create a dependency that will connect the database right at the beginning of a request and disconnect it at the end:
 
-```Python hl_lines="15 16 17 18 19 20 21 22"
-{!./src/sql_databases_peewee/sql_app/main.py!}
+```Python hl_lines="23 24 25 26 27 28 29"
+{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
 ```
 
 Here we have an empty `yield` because we are actually not using the database object directly.
 
 It is connecting to the database and storing the connection data in an internal variable that is independent for each request (using the `contextvars` tricks from above).
 
+Because the database connection is potentially I/O blocking, this dependency is created with a normal `def` function.
+
 And then, in each *path operation function* that needs to access the database we add it as a dependency.
 
 But we are not using the value given by this dependency (it actually doesn't give any value, as it has an empty `yield`). So, we don't add it to the *path operation function* but to the *path operation decorator* in the `dependencies` parameter:
 
-```Python hl_lines="25  33  40  52  58  65"
-{!./src/sql_databases_peewee/sql_app/main.py!}
+```Python hl_lines="32  40  47  59  65  72"
+{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
+```
+
+### Context variable sub-dependency
+
+For all the `contextvars` parts to work, we need to make sure we have an independent value in the `ContextVar` for each request that uses the database, and that value will be used as the database state (connection, transactions, etc) for the whole request.
+
+For that, we need to create another `async` dependency `reset_db_state()` that is used as a sub-dependency in `get_db()`. It will set the value for the context variable (with just a default `dict`) that will be used as the database state for the whole request. And then the dependency `get_db()` will store in it the database state (connection, transactions, etc).
+
+```Python hl_lines="18 19 20"
+{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
+```
+
+For the **next request**, as we will reset that context variable again in the `async` dependency `reset_db_state()` and then create a new connection in the `get_db()` dependency, that new request will have its own database state (connection, transactions, etc).
+
+!!! tip
+    As FastAPI is an async framework, one request could start being processed, and before finishing, another request could be received and start processing as well, and it all could be processed in the same thread.
+
+    But context variables are aware of these async features, so, a Peewee database state set in the `async` dependency `reset_db_state()` will keep its own data throughout the entire request.
+
+    And at the same time, the other concurrent request will have its own database state that will be independent for the whole request.
+
+#### Peewee Proxy
+
+If you are using a <a href="http://docs.peewee-orm.com/en/latest/peewee/database.html#dynamically-defining-a-database" class="external-link" target="_blank">Peewee Proxy</a>, the actual database is at `db.obj`.
+
+So, you would reset it with:
+
+```Python hl_lines="3 4"
+async def reset_db_state():
+    database.db.obj._state._state.set(db_state_default.copy())
+    database.db.obj._state.reset()
 ```
 
 ### Create your **FastAPI** *path operations*
 
 Now, finally, here's the standard **FastAPI** *path operations* code.
 
-```Python hl_lines="25 26 27 28 29 30  33 34 35 36  39 40 41 42 43 44 45 46  49 50 51 52 53 54 55  58 59 60 61  64 65 66 67 68 69 70"
-{!./src/sql_databases_peewee/sql_app/main.py!}
+```Python hl_lines="32 33 34 35 36 37  40 41 42 43  46 47 48 49 50 51 52 53  56 57 58 59 60 61 62  65 66 67 68  71 72 73 74 75 76 77 78 79"
+{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
 ```
 
 ### About `def` vs `async def`
@@ -313,9 +348,9 @@ def read_users(skip: int = 0, limit: int = 100):
 
 ## Testing Peewee with async
 
-This example includes an extra *path operation* that simulates a long processing request with `time.sleep(15)`.
+This example includes an extra *path operation* that simulates a long processing request with `time.sleep(sleep_time)`.
 
-It will have the database connection open at the beginning and will just wait 15 seconds before replying back.
+It will have the database connection open at the beginning and will just wait some seconds before replying back. And each new request will wait one second less.
 
 This will easily let you test that your app with Peewee and FastAPI is behaving correctly with all the stuff about threads.
 
@@ -325,15 +360,30 @@ If you want to check how Peewee would break your app if used without modificatio
 # db._state = PeeweeConnectionState()
 ```
 
-Then run your app with Uvicorn:
+And in the file `sql_app/main.py` file, comment the body of the `async` dependency `reset_db_state()` and replace it with a `pass`:
 
-```bash
-uvicorn sql_app.main:app --reload
+```Python
+async def reset_db_state():
+#     database.db._state._state.set(db_state_default.copy())
+#     database.db._state.reset()
+    pass
 ```
 
-Open your browser at <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>  and create a couple of users.
+Then run your app with Uvicorn:
 
-Then open 10 tabs at <a href="http://127.0.0.1:8000/docs#/default/read_slow_users_slowusers__get" target="_blank">http://127.0.0.1:8000/docs#/default/read_slow_users_slowusers__get</a> at the same time.
+<div class="termy">
+
+```console
+$ uvicorn sql_app.main:app --reload
+
+<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+```
+
+</div>
+
+Open your browser at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>  and create a couple of users.
+
+Then open 10 tabs at <a href="http://127.0.0.1:8000/docs#/default/read_slow_users_slowusers__get" class="external-link" target="_blank">http://127.0.0.1:8000/docs#/default/read_slow_users_slowusers__get</a> at the same time.
 
 Go to the *path operation* "Get `/slowusers/`" in all of the tabs. Use the "Try it out" button and execute the request in each tab, one right after the other.
 
@@ -341,15 +391,19 @@ The tabs will wait for a bit and then some of them will show `Internal Server Er
 
 ### What happens
 
-The first tab will make your app create a connection to the database and wait for 15 seconds before replying back and closing the connection.
+The first tab will make your app create a connection to the database and wait for some seconds before replying back and closing the database connection.
 
-Then one of the other tabs will try to open a database connection, but as one of those requests for the other tabs will probably be handled in the same thread as the first one, it will have the same database connection that is already open, and Peewee will throw an error and you will see it in the terminal, and the response will have an `Internal Server Error`.
+Then, for the request in the next tab, your app will wait for one second less, and so on.
+
+This means that it will end up finishing some of the last tabs' requests earlier than some of the previous ones.
+
+Then one the last requests that wait less seconds will try to open a database connection, but as one of those previous requests for the other tabs will probably be handled in the same thread as the first one, it will have the same database connection that is already open, and Peewee will throw an error and you will see it in the terminal, and the response will have an `Internal Server Error`.
 
 This will probably happen for more than one of those tabs.
 
 If you had multiple clients talking to your app exactly at the same time, this is what could happen.
 
-And as your app starts to handle more and more clients at the same time, the waiting time in a single requests needs to be shorter and shorter to trigger the error.
+And as your app starts to handle more and more clients at the same time, the waiting time in a single request needs to be shorter and shorter to trigger the error.
 
 ### Fix Peewee with FastAPI
 
@@ -359,6 +413,14 @@ Now go back to the file `sql_app/database.py`, and uncomment the line:
 db._state = PeeweeConnectionState()
 ```
 
+And in the file `sql_app/main.py` file, uncomment the body of the `async` dependency `reset_db_state()`:
+
+```Python
+async def reset_db_state():
+    database.db._state._state.set(db_state_default.copy())
+    database.db._state.reset()
+```
+
 Terminate your running app and start it again.
 
 Repeat the same process with the 10 tabs. This time all of them will wait and you will get all the results without errors.
@@ -367,7 +429,7 @@ Repeat the same process with the 10 tabs. This time all of them will wait and yo
 
 ## Review all the files
 
- Remember you should have a directory named `my_super_project` that contains a sub-directory called `sql_app`.
+ Remember you should have a directory named `my_super_project` (or however you want) that contains a sub-directory called `sql_app`.
 
 `sql_app` should have the following files:
 
@@ -375,34 +437,93 @@ Repeat the same process with the 10 tabs. This time all of them will wait and yo
 
 * `sql_app/database.py`:
 
-```Python hl_lines=""
-{!./src/sql_databases_peewee/sql_app/database.py!}
+```Python
+{!../../../docs_src/sql_databases_peewee/sql_app/database.py!}
 ```
 
 * `sql_app/models.py`:
 
-```Python hl_lines=""
-{!./src/sql_databases_peewee/sql_app/models.py!}
+```Python
+{!../../../docs_src/sql_databases_peewee/sql_app/models.py!}
 ```
 
 * `sql_app/schemas.py`:
 
-```Python hl_lines=""
-{!./src/sql_databases_peewee/sql_app/schemas.py!}
+```Python
+{!../../../docs_src/sql_databases_peewee/sql_app/schemas.py!}
 ```
 
 * `sql_app/crud.py`:
 
-```Python hl_lines=""
-{!./src/sql_databases_peewee/sql_app/crud.py!}
+```Python
+{!../../../docs_src/sql_databases_peewee/sql_app/crud.py!}
 ```
 
 * `sql_app/main.py`:
 
-```Python hl_lines=""
-{!./src/sql_databases_peewee/sql_app/main.py!}
+```Python
+{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
 ```
 
 ## Technical Details
 
-If you want to go deeper into the technical details related to Peewee with FastAPI, you can <a href="https://github.com/coleifer/peewee/pull/2072" target="_blank">read more about it here</a>.
+!!! warning
+    These are very technical details that you probably don't need.
+
+### The problem
+
+Peewee uses <a href="https://docs.python.org/3/library/threading.html#thread-local-data" class="external-link" target="_blank">`threading.local`</a> by default to store it's database "state" data (connection, transactions, etc).
+
+`threading.local` creates a value exclusive to the current thread, but an async framework would run all the code (e.g. for each request) in the same thread, and possibly not in order.
+
+On top of that, an async framework could run some sync code in a threadpool (using `asyncio.run_in_executor`), but belonging to the same request.
+
+This means that, with Peewee's current implementation, multiple tasks could be using the same `threading.local` variable and end up sharing the same connection and data (that they shouldn't), and at the same time, if they execute sync I/O-blocking code in a threadpool (as with normal `def` functions in FastAPI, in *path operations*  and dependencies), that code won't have access to the database state variables, even while it's part of the same request and it should be able to get access to the same database state.
+
+### Context variables
+
+Python 3.7 has <a href="https://docs.python.org/3/library/contextvars.html" class="external-link" target="_blank">`contextvars`</a> that can create a local variable very similar to `threading.local`, but also supporting these async features.
+
+There are several things to have in mind.
+
+The `ContextVar` has to be created at the top of the module, like:
+
+```Python
+some_var = ContextVar("some_var", default="default value")
+```
+
+To set a value used in the current "context" (e.g. for the current request) use:
+
+```Python
+some_var.set("new value")
+```
+
+To get a value anywhere inside of the context (e.g. in any part handling the current request) use:
+
+```Python
+some_var.get()
+```
+
+### Set context variables in the `async` dependency `reset_db_state()`
+
+If some part of the async code sets the value with `some_var.set("updated in function")` (e.g. like the `async` dependency), the rest of the code in it and the code that goes after (including code inside of `async` functions called with `await`) will see that new value.
+
+So, in our case, if we set the Peewee state variable (with a default `dict`) in the `async` dependency, all the rest of the internal code in our app will see this value and will be able to reuse it for the whole request.
+
+And the context variable would be set again for the next request, even if they are concurrent.
+
+### Set database state in the dependency `get_db()`
+
+As `get_db()` is a normal `def` function, **FastAPI** will make it run in a threadpool, with a *copy* of the "context", holding the same value for the context variable (the `dict` with the reset database state). Then it can add database state to that `dict`, like the connection, etc.
+
+But if the value of the context variable (the default `dict`) was set in that normal `def` function, it would create a new value that would stay only in that thread of the threadpool, and the rest of the code (like the *path operation functions*) wouldn't have access to it. In `get_db()` we can only set values in the `dict`, but not the entire `dict` itself.
+
+So, we need to have the `async` dependency `reset_db_state()` to set the `dict` in the context variable. That way, all the code has access to the same `dict` for the database state for a single request.
+
+### Connect and disconnect in the dependency `get_db()`
+
+Then the next question would be, why not just connect and disconnect the database in the `async` dependency itself, instead of in `get_db()`?
+
+The `async` dependency has to be `async` for the context variable to be preserved for the rest of the request, but creating and closing the database connection is potentially blocking, so it could degrade performance if it was there.
+
+So we also need the normal `def` dependency `get_db()`.

docs/en/docs/advanced/sub-applications-proxy.md

@@ -1,3 +1,5 @@
+# Sub Applications - Behind a Proxy, Mounts
+
 There are at least two situations where you could need to create your **FastAPI** application using some specific paths.
 
 But then you need to set them up to be served with a path prefix.
@@ -33,7 +35,6 @@ For these cases, you can declare an `openapi_prefix` parameter in your `FastAPI`
 
 See the section below, about "mounting", for an example.
 
-
 ## Mounting a **FastAPI** application
 
 "Mounting" means adding a complete "independent" application in a specific path, that then takes care of handling all the sub-paths.
@@ -42,22 +43,22 @@ You could want to do this if you have several "independent" applications that yo
 
 ### Top-level application
 
-First, create the main, top-level, **FastAPI** application, and its path operations:
+First, create the main, top-level, **FastAPI** application, and its *path operations*:
 
 ```Python hl_lines="3 6 7 8"
-{!./src/sub_applications/tutorial001.py!}
+{!../../../docs_src/sub_applications/tutorial001.py!}
 ```
 
 ### Sub-application
 
-Then, create your sub-application, and its path operations.
+Then, create your sub-application, and its *path operations*.
 
 This sub-application is just another standard FastAPI application, but this is the one that will be "mounted".
 
 When creating the sub-application, use the parameter `openapi_prefix`. In this case, with a prefix of `/subapi`:
 
 ```Python hl_lines="11 14 15 16"
-{!./src/sub_applications/tutorial001.py!}
+{!../../../docs_src/sub_applications/tutorial001.py!}
 ```
 
 ### Mount the sub-application
@@ -67,29 +68,33 @@ In your top-level application, `app`, mount the sub-application, `subapi`.
 Here you need to make sure you use the same path that you used for the `openapi_prefix`, in this case, `/subapi`:
 
 ```Python hl_lines="11 19"
-{!./src/sub_applications/tutorial001.py!}
+{!../../../docs_src/sub_applications/tutorial001.py!}
 ```
 
 ## Check the automatic API docs
 
 Now, run `uvicorn`, if your file is at `main.py`, it would be:
 
-```bash
-uvicorn main:app --reload
+<div class="termy">
+
+```console
+$ uvicorn main:app --reload
+
+<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
 ```
 
-And open the docs at <a href="http://127.0.0.1:8000/docs" target="_blank">http://127.0.0.1:8000/docs</a>.
+</div>
+
+And open the docs at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.
 
 You will see the automatic API docs for the main app, including only its own paths:
 
 <img src="/img/tutorial/sub-applications/image01.png">
 
-
-And then, open the docs for the sub-application, at <a href="http://127.0.0.1:8000/subapi/docs" target="_blank">http://127.0.0.1:8000/subapi/docs</a>.
+And then, open the docs for the sub-application, at <a href="http://127.0.0.1:8000/subapi/docs" class="external-link" target="_blank">http://127.0.0.1:8000/subapi/docs</a>.
 
 You will see the automatic API docs for the sub-application, including only its own sub-paths, with their correct prefix:
 
 <img src="/img/tutorial/sub-applications/image02.png">
 
-
-If you try interacting with any of the two user interfaces, they will work, because the browser will be able to talk to the correct path (or sub-path).
+If you try interacting with any of the two user interfaces, they will work, because the browser will be able to talk to the correct path (or sub-path).

docs/en/docs/advanced/templates.md

@@ -1,43 +1,62 @@
+# Templates
+
 You can use any template engine you want with **FastAPI**.
 
 A common election is Jinja2, the same one used by Flask and other tools.
 
-Starlette has utilities to configure it easily that you can use directly in your **FastAPI** application.
+There are utilities to configure it easily that you can use directly in your **FastAPI** application (provided by Starlette).
 
 ## Install dependencies
 
 Install `jinja2`:
 
-```bash
-pip install jinja2
+<div class="termy">
+
+```console
+$ pip install jinja2
+
+---> 100%
 ```
 
+</div>
+
 If you need to also serve static files (as in this example), install `aiofiles`:
 
-```bash
-pip install aiofiles
+<div class="termy">
+
+```console
+$ pip install aiofiles
+
+---> 100%
 ```
 
+</div>
+
 ## Using `Jinja2Templates`
 
-* Import `Jinja2Templates` form Starlette.
+* Import `Jinja2Templates`.
 * Create a `templates` object that you can re-use later.
 * Declare a `Request` parameter in the *path operation* that will return a template.
 * Use the `templates` you created to render and return a `TemplateResponse`, passing the `request` as one of the key-value pairs in the Jinja2 "context".
 
-```Python hl_lines="4 11 15 16"
-{!./src/templates/tutorial001.py!}
+```Python hl_lines="3  10  14 15"
+{!../../../docs_src/templates/tutorial001.py!}
 ```
 
 !!! note
     Notice that you have to pass the `request` as part of the key-value pairs in the context for Jinja2. So, you also have to declare it in your *path operation*.
 
+!!! note "Technical Details"
+    You could also use `from starlette.templating import Jinja2Templates`.
+
+    **FastAPI** provides the same `starlette.templating` as `fastapi.templating` just as a convenience for you, the developer. But most of the available responses come directly from Starlette. The same with `Request` and `StaticFiles`.
+
 ## Writing templates
 
 Then you can write a template at `templates/item.html` with:
 
 ```jinja hl_lines="7"
-{!./src/templates/templates/item.html!}
+{!../../../docs_src/templates/templates/item.html!}
 ```
 
 It will show the `id` taken from the "context" `dict` you passed:
@@ -51,17 +70,17 @@ It will show the `id` taken from the "context" `dict` you passed:
 And you can also use `url_for()` inside of the template, and use it, for example, with the `StaticFiles` you mounted.
 
 ```jinja hl_lines="4"
-{!./src/templates/templates/item.html!}
+{!../../../docs_src/templates/templates/item.html!}
 ```
 
 In this example, it would link to a CSS file at `static/styles.css` with:
 
 ```CSS hl_lines="4"
-{!./src/templates/static/styles.css!}
+{!../../../docs_src/templates/static/styles.css!}
 ```
 
 And because you are using `StaticFiles`, that CSS file would be served automatically by your **FastAPI** application at the URL `/static/styles.css`.
 
 ## More details
 
-For more details, including how to test templates, check <a href="https://www.starlette.io/templates/" target="_blank">Starlette's docs on templates</a>.
+For more details, including how to test templates, check <a href="https://www.starlette.io/templates/" class="external-link" target="_blank">Starlette's docs on templates</a>.

docs/en/docs/advanced/testing-database.md

@@ -0,0 +1,95 @@
+# Testing a Database
+
+You can use the same dependency overrides from [Testing Dependencies with Overrides](testing-dependencies.md){.internal-link target=_blank} to alter a database for testing.
+
+You could want to set up a different database for testing, rollback the data after the tests, pre-fill it with some testing data, etc.
+
+The main idea is exactly the same you saw in that previous chapter.
+
+## Add tests for the SQL app
+
+Let's update the example from [SQL (Relational) Databases](../tutorial/sql-databases.md){.internal-link target=_blank} to use a testing database.
+
+All the app code is the same, you can go back to that chapter check how it was.
+
+The only changes here are in the new testing file.
+
+Your normal dependency `get_db()` would return a database session.
+
+In the test, you could use a dependency override to return your *custom* database session instead of the one that would be used normally.
+
+In this example we'll create a temporary database only for the tests.
+
+## File structure
+
+We create a new file at `sql_app/tests/test_sql_app.py`.
+
+So the new file structure looks like:
+
+``` hl_lines="9 10 11"
+.
+└── sql_app
+    ├── __init__.py
+    ├── crud.py
+    ├── database.py
+    ├── main.py
+    ├── models.py
+    ├── schemas.py
+    └── tests
+        ├── __init__.py
+        └── test_sql_app.py
+```
+
+## Create the new database session
+
+First, we create a new database session with the new database.
+
+For the tests we'll use a file `test.db` instead of `sql_app.db`.
+
+But the rest of the session code is more or less the same, we just copy it.
+
+```Python hl_lines="8  9  10 11 12 13"
+{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
+```
+
+!!! tip
+    You could reduce duplication in that code by putting it in a function and using it from both `database.py` and `tests/test_sql_app.py`.
+
+    For simplicity and to focus on the specific testing code, we are just copying it.
+
+## Create the database
+
+Because now we are going to use a new database in a new file, we need to make sure we create the database with:
+
+```Python
+Base.metadata.create_all(bind=engine)
+```
+
+That is normally called in `main.py`, but the line in `main.py` uses the database file `sql_app.db`, and we need to make sure we create `test.db` for the tests.
+
+So we add that line here, with the new file.
+
+```Python hl_lines="16"
+{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
+```
+
+## Dependency override
+
+Now we create the dependency override and add it to the overrides for our app.
+
+```Python hl_lines="19 20 21 22 23 24  27"
+{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
+```
+
+!!! tip
+    The code for `override_get_db()` is almost exactly the same as for `get_db()`, but in `override_get_db()` we use the `TestingSessionLocal` for the testing database instead.
+
+## Test the app
+
+Then we can just test the app as normally.
+
+```Python hl_lines="32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47"
+{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
+```
+
+And all the modifications we made in the database during the tests will be in the `test.db` database instead of the main `sql_app.db`.

docs/en/docs/advanced/testing-dependencies.md

@@ -1,3 +1,5 @@
+# Testing Dependencies with Overrides
+
 ## Overriding dependencies during testing
 
 There are some scenarios where you might want to override a dependency during testing.
@@ -18,18 +20,6 @@ You probably want to test the external provider once, but not necessarily call i
 
 In this case, you can override the dependency that calls that provider, and use a custom dependency that returns a mock user, only for your tests.
 
-### Use case: testing database
-
-Other example could be that you are using a specific database only for testing.
-
-Your normal dependency would return a database session.
-
-But then, after each test, you could want to rollback all the operations or remove data.
-
-Or you could want to alter the data before the tests run, etc.
-
-In this case, you could use a dependency override to return your *custom* database session instead of the one that would be used normally.
-
 ### Use the `app.dependency_overrides` attribute
 
 For these cases, your **FastAPI** application has an attribute `app.dependency_overrides`, it is a simple `dict`.
@@ -39,7 +29,7 @@ To override a dependency for testing, you put as a key the original dependency (
 And then **FastAPI** will call that override instead of the original dependency.
 
 ```Python hl_lines="24 25 28"
-{!./src/dependency_testing/tutorial001.py!}
+{!../../../docs_src/dependency_testing/tutorial001.py!}
 ```
 
 !!! tip

docs/en/docs/advanced/testing-events.md

@@ -0,0 +1,7 @@
+# Testing Events: startup - shutdown
+
+When you need your event handlers (`startup` and `shutdown`) to run in your tests, you can use the `TestClient` with a `with` statement:
+
+```Python hl_lines="9 10 11 12 20 21 22 23 24"
+{!../../../docs_src/app_testing/tutorial003.py!}
+```

docs/en/docs/advanced/testing-websockets.md

@@ -0,0 +1,9 @@
+# Testing WebSockets
+
+You can use the same `TestClient` to test WebSockets.
+
+For this, you use the `TestClient` in a `with` statement, connecting to the WebSocket:
+
+```Python hl_lines="27 28 29 30 31"
+{!../../../docs_src/app_testing/tutorial002.py!}
+```

docs/en/docs/advanced/using-request-directly.md

@@ -1,3 +1,5 @@
+# Using the Request Directly
+
 Up to now, you have been declaring the parts of the request that you need with their types.
 
 Taking data from:
@@ -13,9 +15,9 @@ But there are situations where you might need to access the `Request` object dir
 
 ## Details about the `Request` object
 
-As **FastAPI** is actually **Starlette** underneath, with a layer of several tools on top, you can use Starlette's <a href="https://www.starlette.io/requests/" target="_blank">`Request`</a> object directly when you need to.
+As **FastAPI** is actually **Starlette** underneath, with a layer of several tools on top, you can use Starlette's <a href="https://www.starlette.io/requests/" class="external-link" target="_blank">`Request`</a> object directly when you need to.
 
-It would also mean that if you get data from the `Request` object directly (for example, read the body) it won't be validated, converted or annotated (with OpenAPI, for the automatic documentation) by FastAPI.
+It would also mean that if you get data from the `Request` object directly (for example, read the body) it won't be validated, converted or documented (with OpenAPI, for the automatic API user interface) by FastAPI.
 
 Although any other parameter declared normally (for example, the body with a Pydantic model) would still be validated, converted, annotated, etc.
 
@@ -27,24 +29,14 @@ Let's imagine you want to get the client's IP address/host inside of your *path
 
 For that you need to access the request directly.
 
-### Import the `Request`
-
-First, import the `Request` class from Starlette:
-
-```Python hl_lines="2"
-{!./src/using_request_directly/tutorial001.py!}
+```Python hl_lines="1  7 8"
+{!../../../docs_src/using_request_directly/tutorial001.py!}
 ```
 
-### Declare the `Request` parameter
-
-Then declare a *path operation function* parameter with the type being the `Request` class:
-
-```Python hl_lines="8"
-{!./src/using_request_directly/tutorial001.py!}
-```
+By declaring a *path operation function* parameter with the type being the `Request` **FastAPI** will know to pass the `Request` in that parameter.
 
 !!! tip
-    Note that in this case, we are declaring a path parameter besides the request parameter.
+    Note that in this case, we are declaring a path parameter beside the request parameter.
 
     So, the path parameter will be extracted, validated, converted to the specified type and annotated with OpenAPI.
 
@@ -52,4 +44,9 @@ Then declare a *path operation function* parameter with the type being the `Requ
 
 ## `Request` documentation
 
-You can read more details about the <a href="https://www.starlette.io/requests/" target="_blank">`Request` object in the official Starlette documentation site</a>.
+You can read more details about the <a href="https://www.starlette.io/requests/" class="external-link" target="_blank">`Request` object in the official Starlette documentation site</a>.
+
+!!! note "Technical Details"
+    You could also use `from starlette.requests import Request`.
+
+    **FastAPI** provides it directly just as a convenience for you, the developer. But it comes directly from Starlette.

docs/en/docs/advanced/websockets.md

@@ -1,5 +1,6 @@
+# WebSockets
 
-You can use <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API" target="_blank">WebSockets</a> with **FastAPI**.
+You can use <a href="https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API" class="external-link" target="_blank">WebSockets</a> with **FastAPI**.
 
 ## WebSockets client
 
@@ -23,27 +24,29 @@ In production you would have one of the options above.
 
 But it's the simplest way to focus on the server-side of WebSockets and have a working example:
 
-```Python hl_lines="2 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 42 43 44"
-{!./src/websockets/tutorial001.py!}
+```Python hl_lines="2  6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38  41 42 43"
+{!../../../docs_src/websockets/tutorial001.py!}
 ```
 
 ## Create a `websocket`
 
 In your **FastAPI** application, create a `websocket`:
 
-```Python hl_lines="3 47 48"
-{!./src/websockets/tutorial001.py!}
+```Python hl_lines="1 46 47"
+{!../../../docs_src/websockets/tutorial001.py!}
 ```
 
-!!! tip
-    In this example we are importing `WebSocket` from `starlette.websockets` to use it in the type declaration in the WebSocket route function.
+!!! note "Technical Details"
+    You could also use `from starlette.websockets import WebSocket`.
+
+    **FastAPI** provides the same `WebSocket` directly just as a convenience for you, the developer. But it comes directly from Starlette.
 
 ## Await for messages and send messages
 
 In your WebSocket route you can `await` for messages and send messages.
 
-```Python hl_lines="49 50 51 52 53"
-{!./src/websockets/tutorial001.py!}
+```Python hl_lines="48 49 50 51 52"
+{!../../../docs_src/websockets/tutorial001.py!}
 ```
 
 You can receive and send binary, text, and JSON data.
@@ -61,35 +64,39 @@ In WebSocket endpoints you can import from `fastapi` and use:
 
 They work the same way as for other FastAPI endpoints/*path operations*:
 
-```Python hl_lines="55 56 57 58 59 60 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78"
-{!./src/websockets/tutorial002.py!}
+```Python hl_lines="53 54 55 56 57 58  61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76"
+{!../../../docs_src/websockets/tutorial002.py!}
 ```
 
 !!! info
     In a WebSocket it doesn't really make sense to raise an `HTTPException`. So it's better to close the WebSocket connection directly.
 
-    You can use a closing code from the <a href="https://tools.ietf.org/html/rfc6455#section-7.4.1" target="_blank">valid codes defined in the specification</a>.
+    You can use a closing code from the <a href="https://tools.ietf.org/html/rfc6455#section-7.4.1" class="external-link" target="_blank">valid codes defined in the specification</a>.
 
-    In the future, there will be a `WebSocketException` that you will be able to `raise` from anywhere, and add exception handlers for it. It depends on the <a href="https://github.com/encode/starlette/pull/527" target="_blank">PR #527</a> in Starlette.
+    In the future, there will be a `WebSocketException` that you will be able to `raise` from anywhere, and add exception handlers for it. It depends on the <a href="https://github.com/encode/starlette/pull/527" class="external-link" target="_blank">PR #527</a> in Starlette.
 
 ## More info
 
 To learn more about the options, check Starlette's documentation for:
 
-* <a href="https://www.starlette.io/applications/" target="_blank">Applications (`websocket_route`)</a>.
-* <a href="https://www.starlette.io/websockets/" target="_blank">The `WebSocket` class</a>.
-* <a href="https://www.starlette.io/endpoints/#websocketendpoint" target="_blank">Class-based WebSocket handling</a>.
-
+* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank">The `WebSocket` class</a>.
+* <a href="https://www.starlette.io/endpoints/#websocketendpoint" class="external-link" target="_blank">Class-based WebSocket handling</a>.
 
 ## Test it
 
 If your file is named `main.py`, run your application with:
 
-```bash
-uvicorn main:app --reload
+<div class="termy">
+
+```console
+$ uvicorn main:app --reload
+
+<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
 ```
 
-Open your browser at <a href="http://127.0.0.1:8000" target="_blank">http://127.0.0.1:8000</a>.
+</div>
+
+Open your browser at <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.
 
 You will see a simple page like:
 

docs/en/docs/advanced/wsgi.md

@@ -0,0 +1,37 @@
+# Including WSGI - Flask, Django, others
+
+You can mount WSGI applications as you saw with [Sub Applications - Behind a Proxy, Mounts](./sub-applications-proxy.md){.internal-link target=_blank}.
+
+For that, you can use the `WSGIMiddleware` and use it to wrap your WSGI application, for example, Flask, Django, etc.
+
+## Using `WSGIMiddleware`
+
+You need to import `WSGIMiddleware`.
+
+Then wrap the WSGI (e.g. Flask) app with the middleware.
+
+And then mount that under a path.
+
+```Python hl_lines="2 3  22"
+{!../../../docs_src/wsgi/tutorial001.py!}
+```
+
+## Check it
+
+Now, every request under the path `/v1/` will be handled by the Flask application.
+
+And the rest will be handled by **FastAPI**.
+
+If you run it with Uvicorn and go to <a href="http://localhost:8000/v1/" class="external-link" target="_blank">http://localhost:8000/v1/</a> you will see the response from Flask:
+
+```txt
+Hello, World from Flask!
+```
+
+And if you go to <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a> you will see the response from FastAPI:
+
+```JSON
+{
+    "message": "Hello World"
+}
+```

docs/en/docs/alternatives.md

@@ -1,3 +1,5 @@
+# Alternatives, Inspiration and Comparisons
+
 What inspired **FastAPI**, how it compares to other alternatives and what it learned from them.
 
 ## Intro
@@ -12,7 +14,7 @@ But at some point, there was no other option than creating something that provid
 
 ## Previous tools
 
-### <a href="https://www.djangoproject.com/" target="_blank">Django</a>
+### <a href="https://www.djangoproject.com/" class="external-link" target="_blank">Django</a>
 
 It's the most popular Python framework and is widely trusted. It is used to build systems like Instagram.
 
@@ -20,7 +22,7 @@ It's relatively tightly coupled with relational databases (like MySQL or Postgre
 
 It was created to generate the HTML in the backend, not to create APIs used by a modern frontend (like React, Vue.js and Angular) or by other systems (like <abbr title="Internet of Things">IoT</abbr> devices) communicating with it.
 
-### <a href="https://www.django-rest-framework.org/" target="_blank">Django REST Framework</a>
+### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>
 
 Django REST framework was created to be a flexible toolkit for building Web APIs using Django underneath, to improve its API capabilities.
 
@@ -35,7 +37,7 @@ It was one of the first examples of **automatic API documentation**, and this wa
 !!! check "Inspired **FastAPI** to"
     Have an automatic API documentation web user interface.
 
-### <a href="http://flask.pocoo.org/" target="_blank">Flask</a>
+### <a href="http://flask.pocoo.org/" class="external-link" target="_blank">Flask</a>
 
 Flask is a "microframework", it doesn't include database integrations nor many of the things that come by default in Django.
 
@@ -55,7 +57,7 @@ Given the simplicity of Flask, it seemed like a good match for building APIs. Th
     Have a simple and easy to use routing system.
 
 
-### <a href="http://docs.python-requests.org" target="_blank">Requests</a>
+### <a href="http://docs.python-requests.org" class="external-link" target="_blank">Requests</a>
 
 **FastAPI** is not actually an alternative to **Requests**. Their scope is very different.
 
@@ -79,7 +81,7 @@ The way you use it is very simple. For example, to do a `GET` request, you would
 response = requests.get("http://example.com/some/url")
 ```
 
-The FastAPI counterpart API path operation could look like:
+The FastAPI counterpart API *path operation* could look like:
 
 ```Python hl_lines="1"
 @app.get("/some/url")
@@ -95,7 +97,7 @@ See the similarities in `requests.get(...)` and `@app.get(...)`.
     * Have sensible defaults, but powerful customizations.
 
 
-### <a href="https://swagger.io/" target="_blank">Swagger</a> / <a href="https://github.com/OAI/OpenAPI-Specification/" target="_blank">OpenAPI</a>
+### <a href="https://swagger.io/" class="external-link" target="_blank">Swagger</a> / <a href="https://github.com/OAI/OpenAPI-Specification/" class="external-link" target="_blank">OpenAPI</a>
 
 The main feature I wanted from Django REST Framework was the automatic API documentation.
 
@@ -112,8 +114,8 @@ That's why when talking about version 2.0 it's common to say "Swagger", and for
 
     And integrate standards-based user interface tools:
 
-    * <a href="https://github.com/swagger-api/swagger-ui" target="_blank">Swagger UI</a>
-    * <a href="https://github.com/Rebilly/ReDoc" target="_blank">ReDoc</a>
+    * <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>
+    * <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a>
 
     These two were chosen for being fairly popular and stable, but doing a quick search, you could find dozens of additional alternative user interfaces for OpenAPI (that you can use with **FastAPI**).
 
@@ -121,7 +123,7 @@ That's why when talking about version 2.0 it's common to say "Swagger", and for
 
 There are several Flask REST frameworks, but after investing the time and work into investigating them, I found that many are discontinued or abandoned, with several standing issues that made them unfit.
 
-### <a href="https://marshmallow.readthedocs.io/en/3.0/" target="_blank">Marshmallow</a>
+### <a href="https://marshmallow.readthedocs.io/en/3.0/" class="external-link" target="_blank">Marshmallow</a>
 
 One of the main features needed by API systems is data "<abbr title="also called marshalling, conversion">serialization</abbr>" which is taking data from the code (Python) and converting it into something that can be sent through the network. For example, converting an object containing data from a database into a JSON object. Converting `datetime` objects into strings, etc.
 
@@ -136,7 +138,7 @@ But it was created before there existed Python type hints. So, to define every <
 !!! check "Inspired **FastAPI** to"
     Use code to define "schemas" that provide data types and validation, automatically.
 
-### <a href="https://webargs.readthedocs.io/en/latest/" target="_blank">Webargs</a>
+### <a href="https://webargs.readthedocs.io/en/latest/" class="external-link" target="_blank">Webargs</a>
 
 Another big feature required by APIs is <abbr title="reading and converting to Python data">parsing</abbr> data from incoming requests.
 
@@ -152,7 +154,7 @@ It's a great tool and I have used it a lot too, before having **FastAPI**.
 !!! check "Inspired **FastAPI** to"
     Have automatic validation of incoming request data.
 
-### <a href="https://apispec.readthedocs.io/en/stable/" target="_blank">APISpec</a>
+### <a href="https://apispec.readthedocs.io/en/stable/" class="external-link" target="_blank">APISpec</a>
 
 Marshmallow and Webargs provide validation, parsing and serialization as plug-ins.
 
@@ -177,7 +179,7 @@ The editor can't help much with that. And if we modify parameters or Marshmallow
 !!! check "Inspired **FastAPI** to"
     Support the open standard for APIs, OpenAPI.
 
-### <a href="https://flask-apispec.readthedocs.io/en/latest/" target="_blank">Flask-apispec</a>
+### <a href="https://flask-apispec.readthedocs.io/en/latest/" class="external-link" target="_blank">Flask-apispec</a>
 
 It's a Flask plug-in, that ties together Webargs, Marshmallow and APISpec.
 
@@ -191,11 +193,11 @@ This combination of Flask, Flask-apispec with Marshmallow and Webargs was my fav
 
 Using it led to the creation of several Flask full-stack generators. These are the main stack I (and several external teams) have been using up to now:
 
-* <a href="https://github.com/tiangolo/full-stack" target="_blank">https://github.com/tiangolo/full-stack</a>
-* <a href="https://github.com/tiangolo/full-stack-flask-couchbase" target="_blank">https://github.com/tiangolo/full-stack-flask-couchbase</a>
-* <a href="https://github.com/tiangolo/full-stack-flask-couchdb" target="_blank">https://github.com/tiangolo/full-stack-flask-couchdb</a>
+* <a href="https://github.com/tiangolo/full-stack" class="external-link" target="_blank">https://github.com/tiangolo/full-stack</a>
+* <a href="https://github.com/tiangolo/full-stack-flask-couchbase" class="external-link" target="_blank">https://github.com/tiangolo/full-stack-flask-couchbase</a>
+* <a href="https://github.com/tiangolo/full-stack-flask-couchdb" class="external-link" target="_blank">https://github.com/tiangolo/full-stack-flask-couchdb</a>
 
-And these same full-stack generators were the base of the <a href="/project-generation/" target="_blank">**FastAPI** project generator</a>.
+And these same full-stack generators were the base of the [**FastAPI** Project Generators](project-generation.md){.internal-link target=_blank}.
 
 !!! info
     Flask-apispec was created by the same Marshmallow developers.
@@ -203,7 +205,7 @@ And these same full-stack generators were the base of the <a href="/project-gene
 !!! check "Inspired **FastAPI** to"
     Generate the OpenAPI schema automatically, from the same code that defines serialization and validation.
 
-### <a href="https://nestjs.com/" target="_blank">NestJS</a> (and <a href="https://angular.io/" target="_blank">Angular</a>)
+### <a href="https://nestjs.com/" class="external-link" target="_blank">NestJS</a> (and <a href="https://angular.io/" class="external-link" target="_blank">Angular</a>)
 
 This isn't even Python, NestJS is a JavaScript (TypeScript) NodeJS framework inspired by Angular.
 
@@ -222,21 +224,21 @@ It can't handle nested models very well. So, if the JSON body in the request is
 
     Have a powerful dependency injection system. Find a way to minimize code repetition.
 
-### <a href="https://sanic.readthedocs.io/en/latest/" target="_blank">Sanic</a>
+### <a href="https://sanic.readthedocs.io/en/latest/" class="external-link" target="_blank">Sanic</a>
 
 It was one of the first extremely fast Python frameworks based on `asyncio`. It was made to be very similar to Flask.
 
 !!! note "Technical Details"
-    It used <a href="https://github.com/MagicStack/uvloop" target="_blank">`uvloop`</a> instead of the default Python `asyncio` loop. That's what made it so fast.
+    It used <a href="https://github.com/MagicStack/uvloop" class="external-link" target="_blank">`uvloop`</a> instead of the default Python `asyncio` loop. That's what made it so fast.
 
-    It <a href="https://github.com/huge-success/sanic/issues/761" target="_blank">still doesn't implement the ASGI spec for Python asynchronous web development</a>, but it clearly inspired Uvicorn and Starlette, that are currently faster than Sanic in open benchmarks.
+    It clearly inspired Uvicorn and Starlette, that are currently faster than Sanic in open benchmarks.
 
 !!! check "Inspired **FastAPI** to"
     Find a way to have a crazy performance.
     
     That's why **FastAPI** is based on Starlette, as it is the fastest framework available (tested by third-party benchmarks).
 
-### <a href="https://falconframework.org/" target="_blank">Falcon</a>
+### <a href="https://falconframework.org/" class="external-link" target="_blank">Falcon</a>
 
 Falcon is another high performance Python framework, it is designed to be minimal, and work as the foundation of other frameworks like Hug.
 
@@ -253,7 +255,7 @@ So, data validation, serialization, and documentation, have to be done in code,
 
     Although in FastAPI it's optional, and is used mainly to set headers, cookies, and alternative status codes.
 
-### <a href="https://moltenframework.com/" target="_blank">Molten</a>
+### <a href="https://moltenframework.com/" class="external-link" target="_blank">Molten</a>
 
 I discovered Molten in the first stages of building **FastAPI**. And it has quite similar ideas:
 
@@ -274,7 +276,7 @@ Routes are declared in a single place, using functions declared in other places
 
     This actually inspired updating parts of Pydantic, to support the same validation declaration style (all this functionality is now already available in Pydantic).
 
-### <a href="http://www.hug.rest/" target="_blank">Hug</a>
+### <a href="http://www.hug.rest/" class="external-link" target="_blank">Hug</a>
 
 Hug was one of the first frameworks to implement the declaration of API parameter types using Python type hints. This was a great idea that inspired other tools to do the same.
 
@@ -289,7 +291,7 @@ It has an interesting, uncommon feature: using the same framework, it's possible
 As it is based on the previous standard for synchronous Python web frameworks (WSGI), it can't handle Websockets and other things, although it still has high performance too.
 
 !!! info
-    Hug was created by Timothy Crosley, the same creator of <a href="https://github.com/timothycrosley/isort" target="_blank">`isort`</a>, a great tool to automatically sort imports in Python files.
+    Hug was created by Timothy Crosley, the same creator of <a href="https://github.com/timothycrosley/isort" class="external-link" target="_blank">`isort`</a>, a great tool to automatically sort imports in Python files.
 
 !!! check "Ideas inspired in **FastAPI**"
     Hug inspired parts of APIStar, and was one of the tools I found most promising, alongside APIStar.
@@ -298,7 +300,7 @@ As it is based on the previous standard for synchronous Python web frameworks (W
 
     Hug inspired **FastAPI** to declare a `response` parameter in functions to set headers and cookies.
 
-### <a href="https://github.com/encode/apistar" target="_blank">APIStar</a> (<= 0.5)
+### <a href="https://github.com/encode/apistar" class="external-link" target="_blank">APIStar</a> (<= 0.5)
 
 Right before deciding to build **FastAPI** I found **APIStar** server. It had almost everything I was looking for and had a great design.
 
@@ -342,7 +344,7 @@ Now APIStar is a set of tools to validate OpenAPI specifications, not a web fram
 
 ## Used by **FastAPI**
 
-### <a href="https://pydantic-docs.helpmanual.io/" target="_blank">Pydantic</a>
+### <a href="https://pydantic-docs.helpmanual.io/" class="external-link" target="_blank">Pydantic</a>
 
 Pydantic is a library to define data validation, serialization and documentation (using JSON Schema) based on Python type hints.
 
@@ -355,7 +357,7 @@ It is comparable to Marshmallow. Although it's faster than Marshmallow in benchm
 
     **FastAPI** then takes that JSON Schema data and puts it in OpenAPI, apart from all the other things it does.
 
-### <a href="https://www.starlette.io/" target="_blank">Starlette</a>
+### <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a>
 
 Starlette is a lightweight <abbr title="The new standard for building asynchronous Python web">ASGI</abbr> framework/toolkit, which is ideal for building high-performance asyncio services.
 
@@ -395,7 +397,7 @@ That's one of the main things that **FastAPI** adds on top, all based on Python
     
     So, anything that you can do with Starlette, you can do it directly with **FastAPI**, as it is basically Starlette on steroids.
 
-### <a href="https://www.uvicorn.org/" target="_blank">Uvicorn</a>
+### <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a>
 
 Uvicorn is a lightning-fast ASGI server, built on uvloop and httptools.
 
@@ -408,8 +410,8 @@ It is the recommended server for Starlette and **FastAPI**.
 
     You can combine it with Gunicorn, to have an asynchronous multi-process server.
 
-    Check more details in the <a href="/deployment/" target="_blank">Deployment</a> section.
+    Check more details in the [Deployment](deployment.md){.internal-link target=_blank} section.
 
 ## Benchmarks and speed
 
-To understand, compare, and see the difference between Uvicorn, Starlette and FastAPI, check the section about [Benchmarks](/benchmarks/).
+To understand, compare, and see the difference between Uvicorn, Starlette and FastAPI, check the section about [Benchmarks](benchmarks.md){.internal-link target=_blank}.

docs/en/docs/async.md

@@ -1,5 +1,6 @@
-Details about the `async def` syntax for path operation functions and some background about asynchronous code, concurrency, and parallelism.
+# Concurrency and async / await
 
+Details about the `async def` syntax for *path operation functions* and some background about asynchronous code, concurrency, and parallelism.
 
 ## In a hurry?
 
@@ -7,12 +8,11 @@ Details about the `async def` syntax for path operation functions and some backg
 
 If you are using third party libraries that tell you to call them with `await`, like:
 
-
 ```Python
 results = await some_library()
 ```
 
-Then, declare your path operation functions with `async def` like:
+Then, declare your *path operation functions* with `async def` like:
 
 ```Python hl_lines="2"
 @app.get('/')
@@ -26,7 +26,7 @@ async def read_results():
 
 ---
 
-If you are using a third party library that communicates with something (a database, an API, the file system, etc) and doesn't have support for using `await`, (this is currently the case for most database libraries), then declare your path operation functions as normally, with just `def`, like:
+If you are using a third party library that communicates with something (a database, an API, the file system, etc) and doesn't have support for using `await`, (this is currently the case for most database libraries), then declare your *path operation functions* as normally, with just `def`, like:
 
 ```Python hl_lines="2"
 @app.get('/')
@@ -45,33 +45,31 @@ If you just don't know, use normal `def`.
 
 ---
 
-**Note**: you can mix `def` and `async def` in your path operation functions as much as you need and define each one using the best option for you. FastAPI will do the right thing with them.
+**Note**: you can mix `def` and `async def` in your *path operation functions* as much as you need and define each one using the best option for you. FastAPI will do the right thing with them.
 
 Anyway, in any of the cases above, FastAPI will still work asynchronously and be extremely fast.
 
 But by following the steps above, it will be able to do some performance optimizations.
 
-
 ## Technical Details
 
 Modern versions of Python have support for **"asynchronous code"** using something called **"coroutines"**, with **`async` and `await`** syntax.
 
-Let's see that phrase by parts in the sections below, below:
+Let's see that phrase by parts in the sections below:
 
 * **Asynchronous Code**
 * **`async` and `await`**
 * **Coroutines**
 
-
 ## Asynchronous Code
 
-Asynchronous code just means that the language has a way to tell the computer / program that at some point in the code, he will have to wait for *something else* to finish somewhere else. Let's say that *something else* is called "slow-file". 
+Asynchronous code just means that the language 💬 has a way to tell the computer / program 🤖 that at some point in the code, it 🤖 will have to wait for *something else* to finish somewhere else. Let's say that *something else* is called "slow-file" 📝.
 
-So, during that time, the computer can go and do some other work, while "slow-file" finishes. 
+So, during that time, the computer can go and do some other work, while "slow-file" 📝 finishes.
 
-Then the computer / program will come back every time it has a chance because it's waiting again, or whenever he finished all the work he had at that point. And it will see if any of the tasks he was waiting for has already finished doing whatever it had to do.
+Then the computer / program 🤖 will come back every time it has a chance because it's waiting again, or whenever it 🤖 finished all the work it had at that point. And it 🤖 will see if any of the tasks it was waiting for have already finished, doing whatever it had to do.
 
-And then it takes the first task to finish (let's say, our "slow-file") and continues whatever it had to do with it.
+Next, it 🤖 takes the first task to finish (let's say, our "slow-file" 📝) and continues whatever it had to do with it.
 
 That "wait for something else" normally refers to <abbr title="Input and Output">I/O</abbr> operations that are relatively "slow" (compared to the speed of the processor and the RAM memory), like waiting for:
 
@@ -84,7 +82,7 @@ That "wait for something else" normally refers to <abbr title="Input and Output"
 * a database query to return the results
 * etc.
 
-As the execution time is consumed mostly by waiting for <abbr title="Input and Output">I/O</abbr> operations, so they call them "I/O bound".
+As the execution time is consumed mostly by waiting for <abbr title="Input and Output">I/O</abbr> operations, they call them "I/O bound" operations.
 
 It's called "asynchronous" because the computer / program doesn't have to be "synchronized" with the slow task, waiting for the exact moment that the task finishes, while doing nothing, to be able to take the task result and continue the work.
 
@@ -92,123 +90,121 @@ Instead of that, by being an "asynchronous" system, once finished, the task can
 
 For "synchronous" (contrary to "asynchronous") they commonly also use the term "sequential", because the computer / program follows all the steps in sequence before switching to a different task, even if those steps involve waiting.
 
-
 ### Concurrency and Burgers
 
 This idea of **asynchronous** code described above is also sometimes called **"concurrency"**. It is different from **"parallelism"**.
 
-**Concurrency** and **parallelism** both relate to "different things happening more or less at the same time". 
+**Concurrency** and **parallelism** both relate to "different things happening more or less at the same time".
 
 But the details between *concurrency* and *parallelism* are quite different.
 
 To see the difference, imagine the following story about burgers:
 
-
 ### Concurrent Burgers
 
-You go with your crush to get fast food, you stand in line while the cashier takes the orders from the people in front of you.
+You go with your crush 😍 to get fast food 🍔, you stand in line while the cashier 💁 takes the orders from the people in front of you.
 
-Then it's your turn, you place your order of 2 very fancy burgers for your crush and you.
+Then it's your turn, you place your order of 2 very fancy burgers 🍔 for your crush 😍 and you.
 
-You pay.
+You pay 💸.
 
-The cashier says something to the guy in the kitchen so he knows he has to prepare your burgers (even though he is currently preparing the ones for the previous clients).
+The cashier 💁 says something to the guy in the kitchen 👨‍🍳 so he knows he has to prepare your burgers 🍔 (even though he is currently preparing the ones for the previous clients).
 
-The cashier gives you the number of your turn.
+The cashier 💁 gives you the number of your turn.
 
-While you are waiting, you go with your crush and pick a table, you sit and talk with your crush for a long time (as your burgers are very fancy and take some time to prepare).
+While you are waiting, you go with your crush 😍 and pick a table, you sit and talk with your crush 😍 for a long time (as your burgers are very fancy and take some time to prepare ✨🍔✨).
 
-As you are seating on the table with your crush, while you wait for the burgers, you can spend that time admiring how awesome, cute and smart your crush is.
+As you are sitting on the table with your crush 😍, while you wait for the burgers 🍔, you can spend that time admiring how awesome, cute and smart your crush is ✨😍✨.
 
-While waiting and talking to your crush, from time to time, you check the number displayed on the counter to see if it's your turn already.
+While waiting and talking to your crush 😍, from time to time, you check the number displayed on the counter to see if it's your turn already.
 
-Then at some point, it finally is your turn. You go to the counter, get your burgers and come back to the table.
+Then at some point, it finally is your turn. You go to the counter, get your burgers 🍔 and come back to the table.
 
-You and your crush eat the burgers and have a nice time.
+You and your crush 😍 eat the burgers 🍔 and have a nice time ✨.
 
 ---
 
-Imagine you are the computer / program in that story.
+Imagine you are the computer / program 🤖 in that story.
 
-While you are at the line, you are just idle, waiting for your turn, not doing anything very "productive". But the line is fast because the cashier is only taking the orders, so that's fine.
+While you are at the line, you are just idle 😴, waiting for your turn, not doing anything very "productive". But the line is fast because the cashier 💁 is only taking the orders (not preparing them), so that's fine.
 
-Then, when it's your turn, you do actual "productive" work, you process the menu, decide what you want, get your crush's choice, pay, check that you give the correct bill or card, check that you are charged correctly, check that the order has the correct items, etc.
+Then, when it's your turn, you do actual "productive" work 🤓, you process the menu, decide what you want, get your crush's 😍 choice, pay 💸, check that you give the correct bill or card, check that you are charged correctly, check that the order has the correct items, etc.
 
-But then, even though you still don't have your burgers, your work with the cashier is "on pause", because you have to wait for your burgers to be ready.
+But then, even though you still don't have your burgers 🍔, your work with the cashier 💁 is "on pause" ⏸, because you have to wait 🕙 for your burgers to be ready.
 
-But as you go away from the counter and seat on the table with a number for your turn, you can switch your attention to your crush, and "work" on that. Then you are again doing something very "productive", as is flirting with your crush.
+But as you go away from the counter and sit on the table with a number for your turn, you can switch 🔀 your attention to your crush 😍, and "work" ⏯ 🤓 on that. Then you are again doing something very "productive" 🤓, as is flirting with your crush 😍.
 
-Then the cashier says "I'm finished with doing the burgers" by putting your number on the counter display, but you don't jump like crazy immediately when the displayed number changes to your turn number. You know no one will steal your burgers because you have the number of your turn, and they have theirs. 
+Then the cashier 💁 says "I'm finished with doing the burgers" 🍔 by putting your number on the counter's display, but you don't jump like crazy immediately when the displayed number changes to your turn number. You know no one will steal your burgers 🍔 because you have the number of your turn, and they have theirs.
 
-So you wait for your crush to finish the story (finish the current work / task being processed), smile gently and say that you are going for the burgers.
-
-Then you go to the counter, to the initial task that is now finished, pick the burgers, say thanks and take them to the table. That finishes that step / task of interaction with the counter. That in turn, creates a new task, of "eating burgers", but the previous one of "getting burgers" is finished.
+So you wait for your crush 😍 to finish the story (finish the current work ⏯ / task being processed 🤓), smile gently and say that you are going for the burgers ⏸.
 
+Then you go to the counter 🔀, to the initial task that is now finished ⏯, pick the burgers 🍔, say thanks and take them to the table. That finishes that step / task of interaction with the counter ⏹. That in turn, creates a new task, of "eating burgers" 🔀 ⏯, but the previous one of "getting burgers" is finished ⏹.
 
 ### Parallel Burgers
 
-You go with your crush to get parallel fast food.
+Now let's imagine these aren't "Concurrent Burgers", but "Parallel Burgers".
 
-You stand in line while several (let's say 8) cashiers take the orders from the people in front of you.
+You go with your crush 😍 to get parallel fast food 🍔.
 
-Everyone before you is waiting for their burgers to be ready before leaving the counter because each of the 8 cashiers goes himself and preparers the burger right away before getting the next order.
+You stand in line while several (let's say 8) cashiers that at the same time are cooks 👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳 take the orders from the people in front of you.
 
-Then it's finally your turn, you place your order of 2 very fancy burgers for your crush and you.
+Everyone before you is waiting 🕙 for their burgers 🍔 to be ready before leaving the counter because each of the 8 cashiers goes himself and prepares the burger right away before getting the next order.
 
-You pay.
+Then it's finally your turn, you place your order of 2 very fancy burgers 🍔 for your crush 😍 and you.
 
-The cashier goes to the kitchen.
+You pay 💸.
 
-You wait, standing in front of the counter, so that no one else takes your burgers before you, as there are no numbers for turns.
+The cashier goes to the kitchen 👨‍🍳.
 
-As you and your crush are busy not letting anyone get in front of you and take your burgers whenever they arrive, you cannot pay attention to your crush.
+You wait, standing in front of the counter 🕙, so that no one else takes your burgers 🍔 before you do, as there are no numbers for turns.
 
-This is "synchronous" work, you are "synchronized" with the cashier/cook. You have to wait and be there at the exact moment that the cashier/cook finishes the burgers and gives them to you, or otherwise, someone else might take them.
+As you and your crush 😍 are busy not letting anyone get in front of you and take your burgers whenever they arrive 🕙, you cannot pay attention to your crush 😞.
 
-Then your cashier/cook finally comes back with your burgers, after a long time waiting there in front of the counter.
+This is "synchronous" work, you are "synchronized" with the cashier/cook 👨‍🍳. You have to wait 🕙 and be there at the exact moment that the cashier/cook 👨‍🍳 finishes the burgers 🍔 and gives them to you, or otherwise, someone else might take them.
 
-You take your burgers and go to the table with your crush.
+Then your cashier/cook 👨‍🍳 finally comes back with your burgers 🍔, after a long time waiting 🕙 there in front of the counter.
 
-You just eat them, and you are done.
+You take your burgers 🍔 and go to the table with your crush 😍.
 
-There was not much talk or flirting as most of the time was spent waiting in front of the counter.
+You just eat them, and you are done 🍔 ⏹.
+
+There was not much talk or flirting as most of the time was spent waiting 🕙 in front of the counter 😞.
 
 ---
 
-In this scenario of the parallel burgers, you are a computer / program with two processors (you and your crush), both waiting and dedicating their attention to be "waiting on the counter" for a long time.
+In this scenario of the parallel burgers, you are a computer / program 🤖 with two processors (you and your crush 😍), both waiting 🕙 and dedicating their attention ⏯ to be "waiting on the counter" 🕙 for a long time.
 
-The fast food store has 8 processors (cashiers/cooks). While the concurrent burgers store might have had only 2 (one cashier and one cook).
+The fast food store has 8 processors (cashiers/cooks) 👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳. While the concurrent burgers store might have had only 2 (one cashier and one cook) 💁 👨‍🍳.
 
-But still, the final experience is not the best.
+But still, the final experience is not the best 😞.
 
 ---
 
-This would be the parallel equivalent story for burgers.
+This would be the parallel equivalent story for burgers 🍔.
 
 For a more "real life" example of this, imagine a bank.
 
-Up to recently, most of the banks had multiple cashiers and a big line.
+Up to recently, most of the banks had multiple cashiers 👨‍💼👨‍💼👨‍💼👨‍💼 and a big line 🕙🕙🕙🕙🕙🕙🕙🕙.
 
-All of the cashiers doing all the work with one client after the other.
+All of the cashiers doing all the work with one client after the other 👨‍💼⏯.
 
-And you have to wait in the line for a long time or you lose your turn.
-
-You probably wouldn't want to take your crush with you to do errands at the bank.
+And you have to wait 🕙 in the line for a long time or you lose your turn.
 
+You probably wouldn't want to take your crush 😍 with you to do errands at the bank 🏦.
 
 ### Burger Conclusion
 
-In this scenario of "fast food burgers with your crush", as there is a lot of waiting, it makes a lot more sense to have a concurrent system.
+In this scenario of "fast food burgers with your crush", as there is a lot of waiting 🕙, it makes a lot more sense to have a concurrent system ⏸🔀⏯.
 
 This is the case for most of the web applications.
 
-Many, many users, but your server is waiting for their not-so-good connection to send their requests.
+Many, many users, but your server is waiting 🕙 for their not-so-good connection to send their requests.
 
-And then waiting again for the responses to come back.
+And then waiting 🕙 again for the responses to come back.
 
-This "waiting" is measured in microseconds, but still, summing it all, it's a lot of waiting in the end.
+This "waiting" 🕙 is measured in microseconds, but still, summing it all, it's a lot of waiting in the end.
 
-That's why it makes a lot of sense to use asynchronous code for web APIs.
+That's why it makes a lot of sense to use asynchronous ⏸🔀⏯ code for web APIs.
 
 Most of the existing popular Python frameworks (including Flask and Django) were created before the new asynchronous features in Python existed. So, the ways they can be deployed support parallel execution and an older form of asynchronous execution that is not as powerful as the new capabilities.
 
@@ -216,10 +212,9 @@ Even though the main specification for asynchronous web Python (ASGI) was develo
 
 That kind of asynchronicity is what made NodeJS popular (even though NodeJS is not parallel) and that's the strength of Go as a programing language.
 
-And that's the same level of performance</a> you get with **FastAPI**.
-
-And as you can have parallelism and asynchronicity at the same time, you get higher performance than most of the tested NodeJS frameworks and on par with Go, which is a compiled language closer to C <a href="https://www.techempower.com/benchmarks/#section=data-r17&hw=ph&test=query&l=zijmkf-1" target="_blank">(all thanks to Starlette)</a>.
+And that's the same level of performance you get with **FastAPI**.
 
+And as you can have parallelism and asynchronicity at the same time, you get higher performance than most of the tested NodeJS frameworks and on par with Go, which is a compiled language closer to C <a href="https://www.techempower.com/benchmarks/#section=data-r17&hw=ph&test=query&l=zijmkf-1" class="external-link" target="_blank">(all thanks to Starlette)</a>.
 
 ### Is concurrency better than parallelism?
 
@@ -235,15 +230,15 @@ So, to balance that out, imagine the following short story:
 
 ---
 
-There's no waiting anywhere, just a lot of work to be done, on multiple places of the house.
+There's no waiting 🕙 anywhere, just a lot of work to be done, on multiple places of the house.
 
-You could have turns as in the burgers example, first the living room, then the kitchen, but as you are not waiting for anything, just cleaning and cleaning, the turns wouldn't affect anything.
+You could have turns as in the burgers example, first the living room, then the kitchen, but as you are not waiting 🕙 for anything, just cleaning and cleaning, the turns wouldn't affect anything.
 
 It would take the same amount of time to finish with or without turns (concurrency) and you would have done the same amount of work.
 
-But in this case, if you could bring the 8 ex-cashier/cooks/now-cleaners, and each one of them (plus you) could take a zone of the house to clean it, you could do all the work in **parallel**, with the extra help, and finish much sooner.
+But in this case, if you could bring the 8 ex-cashier/cooks/now-cleaners 👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳👨‍🍳, and each one of them (plus you) could take a zone of the house to clean it, you could do all the work in **parallel**, with the extra help, and finish much sooner.
 
-In this scenario, each one of the cleaners (including you) would be a processor, doing their part of the job. 
+In this scenario, each one of the cleaners (including you) would be a processor, doing their part of the job.
 
 And as most of the execution time is taken by actual work (instead of waiting), and the work in a computer is done by a <abbr title="Central Processing Unit">CPU</abbr>, they call these problems "CPU bound".
 
@@ -253,12 +248,11 @@ Common examples of CPU bound operations are things that require complex math pro
 
 For example:
 
-* **Audio** or **image processing**
-* **Computer vision**: an image is composed of millions of pixels, each pixel has 3 values / colors, processing that normally requires computing something on those pixels, all at the same time)
+* **Audio** or **image processing**.
+* **Computer vision**: an image is composed of millions of pixels, each pixel has 3 values / colors, processing that normally requires computing something on those pixels, all at the same time.
 * **Machine Learning**: it normally requires lots of "matrix" and "vector" multiplications. Think of a huge spreadsheet with numbers and multiplying all of them together at the same time.
 * **Deep Learning**: this is a sub-field of Machine Learning, so, the same applies. It's just that there is not a single spreadsheet of numbers to multiply, but a huge set of them, and in many cases, you use a special processor to build and / or use those models.
 
-
 ### Concurrency + Parallelism: Web + Machine Learning
 
 With **FastAPI** you can take the advantage of concurrency that is very common for web development (the same main attractive of NodeJS).
@@ -267,12 +261,11 @@ But you can also exploit the benefits of parallelism and multiprocessing (having
 
 That, plus the simple fact that Python is the main language for **Data Science**, Machine Learning and especially Deep Learning, make FastAPI a very good match for Data Science / Machine Learning web APIs and applications (among many others).
 
-To see how to achieve this parallelism in production see the section about [Deployment](deployment.md).
-
+To see how to achieve this parallelism in production see the section about [Deployment](deployment.md){.internal-link target=_blank}.
 
 ## `async` and `await`
 
-Modern versions of python have a very intuitive way to define asynchronous code. This makes it look just like normal "sequential" code and do the "awaiting" for you at the right moments.
+Modern versions of Python have a very intuitive way to define asynchronous code. This makes it look just like normal "sequential" code and do the "awaiting" for you at the right moments.
 
 When there is an operation that will require waiting before giving the results and has support for these new Python features, you can code it like:
 
@@ -280,7 +273,7 @@ When there is an operation that will require waiting before giving the results a
 burgers = await get_burgers(2)
 ```
 
-The key here is the `await`. It tells Python that it has to wait for `get_burgers(2)` to finish doing its thing before storing the results in `burgers`. With that, Python will know that it can go and do something else in the meanwhile (like receiving another request).
+The key here is the `await`. It tells Python that it has to wait ⏸ for `get_burgers(2)` to finish doing its thing 🕙 before storing the results in `burgers`. With that, Python will know that it can go and do something else 🔀 ⏯ in the meanwhile (like receiving another request).
 
 For `await` to work, it has to be inside a function that supports this asynchronicity. To do that, you just declare it with `async def`:
 
@@ -299,7 +292,7 @@ def get_sequential_burgers(number: int):
     return burgers
 ```
 
-With `async def`, Python knows that, inside that function, it has to be aware of `await` expressions, and that it can "pause" the execution of that function and go do something else before coming back.
+With `async def`, Python knows that, inside that function, it has to be aware of `await` expressions, and that it can "pause" ⏸ the execution of that function and go do something else 🔀 before coming back.
 
 When you want to call an `async def` function, you have to "await" it. So, this won't work:
 
@@ -310,7 +303,7 @@ burgers = get_burgers(2)
 
 ---
 
-So, if you are using a library that tells you that you can call it with `await`, you need to create the path operation functions that uses it with `async def`, like in:
+So, if you are using a library that tells you that you can call it with `await`, you need to create the *path operation functions* that uses it with `async def`, like in:
 
 ```Python hl_lines="2 3"
 @app.get('/burgers')
@@ -327,10 +320,9 @@ But at the same time, functions defined with `async def` have to be "awaited". S
 
 So, about the egg and the chicken, how do you call the first `async` function?
 
-If you are working with **FastAPI** you don't have to worry about that, because that "first" function will be your path operation function, and FastAPI will know how to do the right thing.
-
-But if you want to use `async` / `await` without FastAPI, <a href="https://docs.python.org/3/library/asyncio-task.html#coroutine" target="_blank">check the official Python docs</a>.
+If you are working with **FastAPI** you don't have to worry about that, because that "first" function will be your *path operation function*, and FastAPI will know how to do the right thing.
 
+But if you want to use `async` / `await` without FastAPI, <a href="https://docs.python.org/3/library/asyncio-task.html#coroutine" class="external-link" target="_blank">check the official Python docs</a>.
 
 ### Other forms of asynchronous code
 
@@ -342,14 +334,13 @@ This same syntax (or almost identical) was also included recently in modern vers
 
 But before that, handling asynchronous code was quite more complex and difficult.
 
-In previous versions of Python, you could have used threads or <a href="http://www.gevent.org/" target="_blank">Gevent</a>. But the code is way more complex to understand, debug, and think about.
-
-In previous versions of NodeJS / Browser JavaScript, you would have used "callbacks". Which lead to <a href="http://callbackhell.com/" target="_blank">callback hell</a>.
+In previous versions of Python, you could have used threads or <a href="http://www.gevent.org/" class="external-link" target="_blank">Gevent</a>. But the code is way more complex to understand, debug, and think about.
 
+In previous versions of NodeJS / Browser JavaScript, you would have used "callbacks". Which leads to <a href="http://callbackhell.com/" class="external-link" target="_blank">callback hell</a>.
 
 ## Coroutines
 
-**Coroutine** is just the very fancy term for the thing returned by an `async def` function. Python knows that it is something like a function that it can start and that it will end at some point, but that it might be paused internally too, whenever there is an `await` inside of it.
+**Coroutine** is just the very fancy term for the thing returned by an `async def` function. Python knows that it is something like a function that it can start and that it will end at some point, but that it might be paused ⏸ internally too, whenever there is an `await` inside of it.
 
 But all this functionality of using asynchronous code with `async` and `await` is many times summarized as using "coroutines". It is comparable to the main key feature of Go, the "Goroutines".
 
@@ -359,27 +350,26 @@ Let's see the same phrase from above:
 
 > Modern versions of Python have support for **"asynchronous code"** using something called **"coroutines"**, with **`async` and `await`** syntax.
 
-That should make more sense now.
+That should make more sense now. ✨
 
 All that is what powers FastAPI (through Starlette) and what makes it have such an impressive performance.
 
-
 ## Very Technical Details
 
 !!! warning
     You can probably skip this.
-    
+
     These are very technical details of how **FastAPI** works underneath.
-    
+
     If you have quite some technical knowledge (co-routines, threads, blocking, etc) and are curious about how FastAPI handles `async def` vs normal `def`, go ahead.
 
 ### Path operation functions
 
 When you declare a *path operation function* with normal `def` instead of `async def`, it is run in an external threadpool that is then awaited, instead of being called directly (as it would block the server).
 
-If you are coming from another async framework that does not work in the way described above and you are used to define trivial compute-only *path operation functions* with plain `def` for a tiny performance gain (about 100 nanoseconds), please note that in **FastAPI** the effect would be quite opposite. In these cases, it's better to use `async def` unless your *path operation functions* use code that performs blocking <abbr title="Input/Output: disk reading or writing, network communications.">IO</abbr>.
+If you are coming from another async framework that does not work in the way described above and you are used to define trivial compute-only *path operation functions* with plain `def` for a tiny performance gain (about 100 nanoseconds), please note that in **FastAPI** the effect would be quite opposite. In these cases, it's better to use `async def` unless your *path operation functions* use code that performs blocking <abbr title="Input/Output: disk reading or writing, network communications.">I/O</abbr>.
 
-Still, in both situations, chances are that **FastAPI** will <a href="https://fastapi.tiangolo.com/#performance" target="_blank">still be faster</a> than (or at least comparable to) your previous framework.
+Still, in both situations, chances are that **FastAPI** will [still be faster](/#performance){.internal-link target=_blank} than (or at least comparable to) your previous framework.
 
 ### Dependencies
 
@@ -387,7 +377,7 @@ The same applies for dependencies. If a dependency is a standard `def` function
 
 ### Sub-dependencies
 
-You can have multiple dependencies and sub-dependencies requiring each other (as parameters of the function definitions), some of them might be created with `async def` and some with normal `def`. It would still work, and the ones created with normal `def` would be called on an external thread instead of being "awaited".
+You can have multiple dependencies and sub-dependencies requiring each other (as parameters of the function definitions), some of them might be created with `async def` and some with normal `def`. It would still work, and the ones created with normal `def` would be called on an external thread (from the threadpool) instead of being "awaited".
 
 ### Other utility functions
 
@@ -395,7 +385,7 @@ Any other utility function that you call directly can be created with normal `de
 
 This is in contrast to the functions that FastAPI calls for you: *path operation functions* and dependencies.
 
-If your utility function is a normal function with `def`, it will be called directly (as you write it in your code), not in a threadpool, if the function is created with `async def` then you should await for that function when you call it in your code.
+If your utility function is a normal function with `def`, it will be called directly (as you write it in your code), not in a threadpool, if the function is created with `async def` then you should `await` for that function when you call it in your code.
 
 ---
 

docs/en/docs/benchmarks.md

@@ -1,4 +1,6 @@
-Independent TechEmpower benchmarks show **FastAPI** applications running under Uvicorn as <a href="https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7" target="_blank">one of the fastest Python frameworks available</a>, only below Starlette and Uvicorn themselves (used internally by FastAPI). (*)
+# Benchmarks
+
+Independent TechEmpower benchmarks show **FastAPI** applications running under Uvicorn as <a href="https://www.techempower.com/benchmarks/#section=test&runid=7464e520-0dc2-473d-bd34-dbdfd7e85911&hw=ph&test=query&l=zijzen-7" class="external-link" target="_blank">one of the fastest Python frameworks available</a>, only below Starlette and Uvicorn themselves (used internally by FastAPI). (*)
 
 But when checking benchmarks and comparisons you should have the following in mind.
 

docs/en/docs/contributing.md

@@ -0,0 +1,511 @@
+# Development - Contributing
+
+First, you might want to see the basic ways to [help FastAPI and get help](help-fastapi.md){.internal-link target=_blank}.
+
+## Developing
+
+If you already cloned the repository and you know that you need to deep dive in the code, here are some guidelines to set up your environment.
+
+### Virtual environment with `venv`
+
+You can create a virtual environment in a directory using Python's `venv` module:
+
+<div class="termy">
+
+```console
+$ python -m venv env
+```
+
+</div>
+
+That will create a directory `./env/` with the Python binaries and then you will be able to install packages for that isolated environment.
+
+### Activate the environment
+
+Activate the new environment with:
+
+=== "Linux, macOS"
+
+    <div class="termy">
+
+    ```console
+    $ source ./env/bin/activate
+    ```
+
+    </div>
+
+=== "Windows PowerShell"
+
+    <div class="termy">
+
+    ```console
+    $ .\env\Scripts\Activate.ps1
+    ```
+
+    </div>
+
+=== "Windows Bash"
+
+    Or if you use Bash for Windows (e.g. <a href="https://gitforwindows.org/" class="external-link" target="_blank">Git Bash</a>):
+
+    <div class="termy">
+
+    ```console
+    $ source ./env/Scripts/activate
+    ```
+
+    </div>
+
+To check it worked, use:
+
+=== "Linux, macOS, Windows Bash"
+
+    <div class="termy">
+
+    ```console
+    $ which pip
+
+    some/directory/fastapi/env/bin/pip
+    ```
+
+    </div>
+
+=== "Windows PowerShell"
+
+    <div class="termy">
+
+    ```console
+    $ Get-Command pip
+
+    some/directory/fastapi/env/bin/pip
+    ```
+
+    </div>
+
+If it shows the `pip` binary at `env/bin/pip` then it worked. 🎉
+
+
+
+!!! tip
+    Every time you install a new package with `pip` under that environment, activate the environment again.
+
+    This makes sure that if you use a terminal program installed by that package (like `flit`), you use the one from your local environment and not any other that could be installed globally.
+
+### Flit
+
+**FastAPI** uses <a href="https://flit.readthedocs.io/en/latest/index.html" class="external-link" target="_blank">Flit</a> to build, package and publish the project.
+
+After activating the environment as described above, install `flit`:
+
+<div class="termy">
+
+```console
+$ pip install flit
+
+---> 100%
+```
+
+</div>
+
+Now re-activate the environment to make sure you are using the `flit` you just installed (and not a global one).
+
+And now use `flit` to install the development dependencies:
+
+=== "Linux, macOS"
+
+    <div class="termy">
+
+    ```console
+    $ flit install --deps develop --symlink
+
+    ---> 100%
+    ```
+
+    </div>
+
+=== "Windows"
+
+    If you are on Windows, use `--pth-file` instead of `--symlink`:
+
+    <div class="termy">
+
+    ```console
+    $ flit install --deps develop --pth-file
+
+    ---> 100%
+    ```
+
+    </div>
+
+It will install all the dependencies and your local FastAPI in your local environment.
+
+#### Using your local FastAPI
+
+If you create a Python file that imports and uses FastAPI, and run it with the Python from your local environment, it will use your local FastAPI source code.
+
+And if you update that local FastAPI source code, as it is installed with `--symlink` (or `--pth-file` on Windows), when you run that Python file again, it will use the fresh version of FastAPI you just edited.
+
+That way, you don't have to "install" your local version to be able to test every change.
+
+### Format
+
+There is a script that you can run that will format and clean all your code:
+
+<div class="termy">
+
+```console
+$ bash scripts/format.sh
+```
+
+</div>
+
+It will also auto-sort all your imports.
+
+For it to sort them correctly, you need to have FastAPI installed locally in your environment, with the command in the section above using `--symlink` (or `--pth-file` on Windows).
+
+### Format imports
+
+There is another script that formats all the imports and makes sure you don't have unused imports:
+
+<div class="termy">
+
+```console
+$ bash scripts/format-imports.sh
+```
+
+</div>
+
+As it runs one command after the other and modifies and reverts many files, it takes a bit longer to run, so it might be easier to use `scripts/format.sh` frequently and `scripts/format-imports.sh` only before committing.
+
+## Docs
+
+First, make sure you set up your environment as described above, that will install all the requirements.
+
+The documentation uses <a href="https://www.mkdocs.org/" class="external-link" target="_blank">MkDocs</a>.
+
+And there are extra tools/scripts in place to handle translations in `./scripts/docs.py`.
+
+!!! tip
+    You don't need to see the code in `./scripts/docs.py`, you just use it in the command line.
+
+All the documentation is in Markdown format in the directory `./docs/en/`.
+
+Many of the tutorials have blocks of code.
+
+In most of the cases, these blocks of code are actual complete applications that can be run as is.
+
+In fact, those blocks of code are not written inside the Markdown, they are Python files in the `./docs_src/` directory.
+
+And those Python files are included/injected in the documentation when generating the site.
+
+### Docs for tests
+
+Most of the tests actually run against the example source files in the documentation.
+
+This helps making sure that:
+
+* The documentation is up to date.
+* The documentation examples can be run as is.
+* Most of the features are covered by the documentation, ensured by test coverage.
+
+During local development, there is a script that builds the site and checks for any changes, live-reloading:
+
+<div class="termy">
+
+```console
+$ python ./scripts/docs.py live
+
+<span style="color: green;">[INFO]</span> Serving on http://127.0.0.1:8008
+<span style="color: green;">[INFO]</span> Start watching changes
+<span style="color: green;">[INFO]</span> Start detecting changes
+```
+
+</div>
+
+It will serve the documentation on `http://127.0.0.1:8008`.
+
+That way, you can edit the documentation/source files and see the changes live.
+
+#### Typer CLI (optional)
+
+The instructions here show you how to use the script at `./scripts/docs.py` with the `python` program directly.
+
+But you can also use <a href="https://typer.tiangolo.com/typer-cli/" class="external-link" target="_blank">Typer CLI</a>, and you will get autocompletion in your terminal for the commands after installing completion.
+
+If you install Typer CLI, you can install completion with:
+
+<div class="termy">
+
+```console
+$ typer --install-completion
+
+zsh completion installed in /home/user/.bashrc.
+Completion will take effect once you restart the terminal.
+```
+
+</div>
+
+### Apps and docs at the same time
+
+If you run the examples with, e.g.:
+
+<div class="termy">
+
+```console
+$ uvicorn tutorial001:app --reload
+
+<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
+```
+
+</div>
+
+as Uvicorn by default will use the port `8000`, the documentation on port `8008` won't clash.
+
+### Translations
+
+Help with translations is VERY MUCH appreciated! And it can't be done without the help from the community. 🌎 🚀
+
+Here are the steps to help with translations.
+
+#### Tips and guidelines
+
+* Check the currently <a href="https://github.com/tiangolo/fastapi/pulls" class="external-link" target="_blank">existing pull requests</a> for your language and add reviews requesting changes or approving them.
+
+!!! tip
+    You can <a href="https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/commenting-on-a-pull-request" class="external-link" target="_blank">add comments with change suggestions</a> to existing pull requests.
+
+    Check the docs about <a href="https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-request-reviews" class="external-link" target="_blank">adding a pull request review</a> to approve it or request changes.
+
+* Check in the <a href="https://github.com/tiangolo/fastapi/issues" class="external-link" target="_blank">issues</a> to see if there's one coordinating translations for your language.
+
+* Add a single pull request per page translated. That will make it much easier for others to review it.
+
+For the languages I don't speak, I'll wait for several others to review the translation before merging.
+
+* You can also check if there are translations for your language and add a review to them, that will help me know that the translation is correct and I can merge it.
+
+* Use the same Python examples and only translate the text in the docs. You don't have to change anything for this to work.
+
+* Use the same images, file names, and links. You don't have to change anything for it to work.
+
+* To check the 2-letter code for the language you want to translate you can use the table <a href="https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes" class="external-link" target="_blank">List of ISO 639-1 codes</a>.
+
+#### Existing language
+
+Let's say you want to translate a page for a language that already has translations for some pages, like Spanish.
+
+In the case of Spanish, the 2-letter code is `es`. So, the directory for Spanish translations is located at `docs/es/`.
+
+!!! tip
+    The main ("official") language is English, located at `docs/en/`.
+
+Now run the live server for the docs in Spanish:
+
+<div class="termy">
+
+```console
+// Use the command "live" and pass the language code as a CLI argument
+$ python ./scripts/docs.py live es
+
+<span style="color: green;">[INFO]</span> Serving on http://127.0.0.1:8008
+<span style="color: green;">[INFO]</span> Start watching changes
+<span style="color: green;">[INFO]</span> Start detecting changes
+```
+
+</div>
+
+Now you can go to <a href="http://127.0.0.1:8008" class="external-link" target="_blank">http://127.0.0.1:8008</a> and see your changes live.
+
+If you look at the FastAPI docs website, you will see that every language has all the pages. But some pages are not translated and have a notification about the missing translation.
+
+But when you run it locally like this, you will only see the pages that are already translated.
+
+Now let's say that you want to add a translation for the section [Features](features.md){.internal-link target=_blank}.
+
+* Copy the file at:
+
+```
+docs/en/docs/features.md
+```
+
+* Paste it in exactly the same location but for the language you want to translate, e.g.:
+
+```
+docs/es/docs/features.md
+```
+
+!!! tip
+    Notice that the only change in the path and file name is the language code, from `en` to `es`.
+
+* Now open the MkDocs config file for English at:
+
+```
+docs/en/docs/mkdocs.yml
+```
+
+* Find the place where that `docs/features.md` is located in the config file. Somewhere like:
+
+```YAML hl_lines="8"
+site_name: FastAPI
+# More stuff
+nav:
+- FastAPI: index.md
+- Languages:
+  - en: /
+  - es: /es/
+- features.md
+```
+
+* Open the MkDocs config file for the language you are editing, e.g.:
+
+```
+docs/es/docs/mkdocs.yml
+```
+
+* Add it there at the exact same location it was for English, e.g.:
+
+```YAML hl_lines="8"
+site_name: FastAPI
+# More stuff
+nav:
+- FastAPI: index.md
+- Languages:
+  - en: /
+  - es: /es/
+- features.md
+```
+
+Make sure that if there are other entries, the new entry with your translation is exactly in the same order as in the English version.
+
+If you go to your browser you will see that now the docs show your new section. 🎉
+
+Now you can translate it all and see how it looks as you save the file.
+
+#### New Language
+
+Let's say that you want to add translations for a language that is not yet translated, not even some pages.
+
+Let's say you want to add translations for Creole, and it's not yet there in the docs.
+
+Checking the link from above, the code for "Creole" is `ht`.
+
+The next step is to run the script to generate a new translation directory:
+
+<div class="termy">
+
+```console
+// Use the command new-lang, pass the language code as a CLI argument
+$ python ./scripts/docs.py new-lang ht
+
+Successfully initialized: docs/ht
+Updating ht
+Updating en
+```
+
+</div>
+
+Now you can check in your code editor the newly created directory `docs/ht/`.
+
+!!! tip
+    Create a first pull request with just this, to set up the configuration for the new language, before adding translations.
+
+    That way others can help with other pages while you work on the first one. 🚀
+
+Start by translating the main page, `docs/ht/index.md`.
+
+Then you can continue with the previous instructions, for an "Existing Language".
+
+##### New Language not supported
+
+If when running the live server script you get an error about the language not being supported, something like:
+
+```
+ raise TemplateNotFound(template)
+jinja2.exceptions.TemplateNotFound: partials/language/xx.html
+```
+
+That means that the theme doesn't support that language (in this case, with a fake 2-letter code of `xx`).
+
+But don't worry, you can set the theme language to English and then translate the content of the docs.
+
+If you need to do that, edit the `mkdocs.yml` for your new language, it will have something like:
+
+```YAML hl_lines="5"
+site_name: FastAPI
+# More stuff
+theme:
+  # More stuff
+  language: xx
+```
+
+Change that language from `xx` (from your language code) to `en`.
+
+Then you can start the live server again.
+
+#### Preview the result
+
+When you use the script at `./scripts/docs.py` with the `live` command it only shows the files and translations available for the current language.
+
+But once you are done, you can test it all as it would look online.
+
+To do that, first build all the docs:
+
+<div class="termy">
+
+```console
+// Use the command "build-all", this will take a bit
+$ python ./scripts/docs.py build-all
+
+Updating es
+Updating en
+Building docs for: en
+Building docs for: es
+Successfully built docs for: es
+Copying en index.md to README.md
+```
+
+</div>
+
+That generates all the docs at `./docs_build/` for each language. This includes adding any files with missing translations, with a note saying that "this file doesn't have a translation yet". But you don't have to do anything with that directory.
+
+Then it builds all those independent MkDocs sites for each language, combines them, and generates the final output at `./site/`.
+
+Then you can serve that with the command `serve`:
+
+<div class="termy">
+
+```console
+// Use the command "serve" after running "build-all"
+$ python ./scripts/docs.py serve
+
+Warning: this is a very simple server. For development, use mkdocs serve instead.
+This is here only to preview a site with translations already built.
+Make sure you run the build-all command first.
+Serving at: http://127.0.0.1:8008
+```
+
+</div>
+
+## Tests
+
+There is a script that you can run locally to test all the code and generate coverage reports in HTML:
+
+<div class="termy">
+
+```console
+$ bash scripts/test-cov-html.sh
+```
+
+</div>
+
+This command generates a directory `./htmlcov/`, if you open the file `./htmlcov/index.html` in your browser, you can explore interactively the regions of code that are covered by the tests, and notice if there is any region missing.
+
+### Tests in your editor
+
+If you want to use the integrated tests in your editor add `./docs_src` to your `PYTHONPATH` variable.
+
+For example, in VS Code you can create a file `.env` with:
+
+```env
+PYTHONPATH=./docs_src
+```

docs/en/docs/css/custom.css

@@ -0,0 +1,13 @@
+a.external-link::after {
+    /* \00A0 is a non-breaking space
+        to make the mark be on the same line as the link
+    */
+    content: "\00A0[↪]";
+}
+
+a.internal-link::after {
+    /* \00A0 is a non-breaking space
+        to make the mark be on the same line as the link
+    */
+    content: "\00A0↪";
+}

docs/en/docs/css/termynal.css

@@ -0,0 +1,108 @@
+/**
+ * termynal.js
+ *
+ * @author Ines Montani <ines@ines.io>
+ * @version 0.0.1
+ * @license MIT
+ */
+
+:root {
+    --color-bg: #252a33;
+    --color-text: #eee;
+    --color-text-subtle: #a2a2a2;
+}
+
+[data-termynal] {
+    width: 750px;
+    max-width: 100%;
+    background: var(--color-bg);
+    color: var(--color-text);
+    font-size: 18px;
+    /* font-family: 'Fira Mono', Consolas, Menlo, Monaco, 'Courier New', Courier, monospace; */
+    font-family: 'Roboto Mono', 'Fira Mono', Consolas, Menlo, Monaco, 'Courier New', Courier, monospace;
+    border-radius: 4px;
+    padding: 75px 45px 35px;
+    position: relative;
+    -webkit-box-sizing: border-box;
+            box-sizing: border-box;
+}
+
+[data-termynal]:before {
+    content: '';
+    position: absolute;
+    top: 15px;
+    left: 15px;
+    display: inline-block;
+    width: 15px;
+    height: 15px;
+    border-radius: 50%;
+    /* A little hack to display the window buttons in one pseudo element. */
+    background: #d9515d;
+    -webkit-box-shadow: 25px 0 0 #f4c025, 50px 0 0 #3ec930;
+            box-shadow: 25px 0 0 #f4c025, 50px 0 0 #3ec930;
+}
+
+[data-termynal]:after {
+    content: 'bash';
+    position: absolute;
+    color: var(--color-text-subtle);
+    top: 5px;
+    left: 0;
+    width: 100%;
+    text-align: center;
+}
+
+a[data-terminal-control] {
+    text-align: right;
+    display: block;
+    color: #aebbff;
+}
+
+[data-ty] {
+    display: block;
+    line-height: 2;
+}
+
+[data-ty]:before {
+    /* Set up defaults and ensure empty lines are displayed. */
+    content: '';
+    display: inline-block;
+    vertical-align: middle;
+}
+
+[data-ty="input"]:before,
+[data-ty-prompt]:before {
+    margin-right: 0.75em;
+    color: var(--color-text-subtle);
+}
+
+[data-ty="input"]:before {
+    content: '$';
+}
+
+[data-ty][data-ty-prompt]:before {
+    content: attr(data-ty-prompt);
+}
+
+[data-ty-cursor]:after {
+    content: attr(data-ty-cursor);
+    font-family: monospace;
+    margin-left: 0.5em;
+    -webkit-animation: blink 1s infinite;
+            animation: blink 1s infinite;
+}
+
+
+/* Cursor animation */
+
+@-webkit-keyframes blink {
+    50% {
+        opacity: 0;
+    }
+}
+
+@keyframes blink {
+    50% {
+        opacity: 0;
+    }
+}

docs/en/docs/deployment.md

@@ -1,4 +1,100 @@
-You can use <a href="https://www.docker.com/" target="_blank">**Docker**</a> for deployment. It has several advantages like security, replicability, development simplicity, etc.
+# Deployment
+
+Deploying a **FastAPI** application is relatively easy.
+
+There are several ways to do it depending on your specific use case and the tools that you use.
+
+You will see more about some of the ways to do it in the next sections.
+
+## FastAPI versions
+
+**FastAPI** is already being used in production in many applications and systems. And the test coverage is kept at 100%. But its development is still moving quickly.
+
+New features are added frequently, bugs are fixed regularly, and the code is still continuously improving.
+
+That's why the current versions are still `0.x.x`, this reflects that each version could potentially have breaking changes. This follows the <a href="https://semver.org/" class="external-link" target="_blank">Semantic Versioning</a> conventions.
+
+You can create production applications with **FastAPI** right now (and you have probably been doing it for some time), you just have to make sure that you use a version that works correctly with the rest of your code.
+
+### Pin your `fastapi` version
+
+The first thing you should do is to "pin" the version of **FastAPI** you are using to the specific latest version that you know works correctly for your application.
+
+For example, let's say you are using version `0.45.0` in your app.
+
+If you use a `requirements.txt` file you could specify the version with:
+
+```txt
+fastapi==0.45.0
+```
+
+that would mean that you would use exactly the version `0.45.0`.
+
+Or you could also pin it with:
+
+```txt
+fastapi>=0.45.0,<0.46.0
+```
+
+that would mean that you would use the versions `0.45.0` or above, but less than `0.46.0`, for example, a version `0.45.2` would still be accepted.
+
+If you use any other tool to manage your installations, like Poetry, Pipenv, or others, they all have a way that you can use to define specific versions for your packages.
+
+### Available versions
+
+You can see the available versions (e.g. to check what is the current latest) in the [Release Notes](release-notes.md){.internal-link target=_blank}.
+
+### About versions
+
+Following the Semantic Versioning conventions, any version below `1.0.0` could potentially add breaking changes.
+
+FastAPI also follows the convention that any "PATCH" version change is for bug fixes and non-breaking changes.
+
+!!! tip
+    The "PATCH" is the last number, for example, in `0.2.3`, the PATCH version is `3`.
+
+So, you should be able to pin to a version like:
+
+```txt
+fastapi>=0.45.0,<0.46.0
+```
+
+Breaking changes and new features are added in "MINOR" versions.
+
+!!! tip
+    The "MINOR" is the number in the middle, for example, in `0.2.3`, the MINOR version is `2`.
+
+### Upgrading the FastAPI versions
+
+You should add tests for your app.
+
+With **FastAPI** it's very easy (thanks to Starlette), check the docs: [Testing](tutorial/testing.md){.internal-link target=_blank}
+
+After you have tests, then you can upgrade the **FastAPI** version to a more recent one, and make sure that all your code is working correctly by running your tests.
+
+If everything is working, or after you make the necessary changes, and all your tests are passing, then you can pin your `fastapi` to that new recent version.
+
+### About Starlette
+
+You shouldn't pin the version of `starlette`.
+
+Different versions of **FastAPI** will use a specific newer version of Starlette.
+
+So, you can just let **FastAPI** use the correct Starlette version.
+
+### About Pydantic
+
+Pydantic includes the tests for **FastAPI** with its own tests, so new versions of Pydantic (above `1.0.0`) are always compatible with FastAPI.
+
+You can pin Pydantic to any version above `1.0.0` that works for you and below `2.0.0`.
+
+For example:
+
+```txt
+pydantic>=1.2.0,<2.0.0
+```
+
+## Docker
 
 In this section you'll see instructions and links to guides to know how to:
 
@@ -7,24 +103,18 @@ In this section you'll see instructions and links to guides to know how to:
 * Set up a Docker Swarm mode cluster with automatic HTTPS, even on a simple $5 USD/month server. In about **20 min**.
 * Generate and deploy a full **FastAPI** application, using your Docker Swarm cluster, with HTTPS, etc. In about **10 min**.
 
----
-
-You can also easily use **FastAPI** in a standard server directly too (without Docker).
-
-
-## Docker
+You can use <a href="https://www.docker.com/" class="external-link" target="_blank">**Docker**</a> for deployment. It has several advantages like security, replicability, development simplicity, etc.
 
 If you are using Docker, you can use the official Docker image:
 
-### <a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker" target="_blank">tiangolo/uvicorn-gunicorn-fastapi</a>
+### <a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker" class="external-link" target="_blank">tiangolo/uvicorn-gunicorn-fastapi</a>
 
 This image has an "auto-tuning" mechanism included, so that you can just add your code and get very high performance automatically. And without making sacrifices.
 
 But you can still change and update all the configurations with environment variables or configuration files.
 
 !!! tip
-    To see all the configurations and options, go to the Docker image page: <a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker" target="_blank">tiangolo/uvicorn-gunicorn-fastapi</a>.
-
+    To see all the configurations and options, go to the Docker image page: <a href="https://github.com/tiangolo/uvicorn-gunicorn-fastapi-docker" class="external-link" target="_blank">tiangolo/uvicorn-gunicorn-fastapi</a>.
 
 ### Create a `Dockerfile`
 
@@ -39,8 +129,7 @@ COPY ./app /app
 
 #### Bigger Applications
 
-If you followed the section about creating <a href="https://fastapi.tiangolo.com/tutorial/bigger-applications/" target="_blank">Bigger Applications with Multiple Files
-</a>, your `Dockerfile` might instead look like:
+If you followed the section about creating [Bigger Applications with Multiple Files](tutorial/bigger-applications.md){.internal-link target=_blank}, your `Dockerfile` might instead look like:
 
 ```Dockerfile
 FROM tiangolo/uvicorn-gunicorn-fastapi:python3.7
@@ -101,24 +190,33 @@ def read_item(item_id: int, q: str = None):
 * Go to the project directory (in where your `Dockerfile` is, containing your `app` directory).
 * Build your FastAPI image:
 
-```bash
-docker build -t myimage .
+<div class="termy">
+
+```console
+$ docker build -t myimage .
+
+---> 100%
 ```
 
+</div>
+
 ### Start the Docker container
 
 * Run a container based on your image:
 
-```bash
-docker run -d --name mycontainer -p 80:80 myimage
+<div class="termy">
+
+```console
+$ docker run -d --name mycontainer -p 80:80 myimage
 ```
 
+</div>
+
 Now you have an optimized FastAPI server in a Docker container. Auto-tuned for your current server (and number of CPU cores).
 
-
 ### Check it
 
-You should be able to check it in your Docker container's URL, for example: <a href="http://192.168.99.100/items/5?q=somequery" target="_blank">http://192.168.99.100/items/5?q=somequery</a> or <a href="http://127.0.0.1/items/5?q=somequery" target="_blank">http://127.0.0.1/items/5?q=somequery</a> (or equivalent, using your Docker host).
+You should be able to check it in your Docker container's URL, for example: <a href="http://192.168.99.100/items/5?q=somequery" class="external-link" target="_blank">http://192.168.99.100/items/5?q=somequery</a> or <a href="http://127.0.0.1/items/5?q=somequery" class="external-link" target="_blank">http://127.0.0.1/items/5?q=somequery</a> (or equivalent, using your Docker host).
 
 You will see something like:
 
@@ -126,25 +224,22 @@ You will see something like:
 {"item_id": 5, "q": "somequery"}
 ```
 
-
 ### Interactive API docs
 
-Now you can go to <a href="http://192.168.99.100/docs" target="_blank">http://192.168.99.100/docs</a> or <a href="http://127.0.0.1/docs" target="_blank">http://127.0.0.1/docs</a> (or equivalent, using your Docker host).
+Now you can go to <a href="http://192.168.99.100/docs" class="external-link" target="_blank">http://192.168.99.100/docs</a> or <a href="http://127.0.0.1/docs" class="external-link" target="_blank">http://127.0.0.1/docs</a> (or equivalent, using your Docker host).
 
-You will see the automatic interactive API documentation (provided by <a href="https://github.com/swagger-api/swagger-ui" target="_blank">Swagger UI</a>):
+You will see the automatic interactive API documentation (provided by <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):
 
 ![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)
 
-
 ### Alternative API docs
 
-And you can also go to <a href="http://192.168.99.100/redoc" target="_blank">http://192.168.99.100/redoc</a> or <a href="http://127.0.0.1/redoc" target="_blank">http://127.0.0.1/redoc</a> (or equivalent, using your Docker host).
+And you can also go to <a href="http://192.168.99.100/redoc" class="external-link" target="_blank">http://192.168.99.100/redoc</a> or <a href="http://127.0.0.1/redoc" class="external-link" target="_blank">http://127.0.0.1/redoc</a> (or equivalent, using your Docker host).
 
-You will see the alternative automatic documentation (provided by <a href="https://github.com/Rebilly/ReDoc" target="_blank">ReDoc</a>):
+You will see the alternative automatic documentation (provided by <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank">ReDoc</a>):
 
 ![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)
 
-
 ## HTTPS
 
 ### About HTTPS
@@ -156,7 +251,7 @@ But it is way more complex than that.
 !!! tip
     If you are in a hurry or don't care, continue with the next section for step by step instructions to set everything up.
 
-To learn the basics of HTTPS, from a consumer perspective, check <a href="https://howhttps.works/" target="_blank">https://howhttps.works/</a>.
+To learn the basics of HTTPS, from a consumer perspective, check <a href="https://howhttps.works/" class="external-link" target="_blank">https://howhttps.works/</a>.
 
 Now, from a developer's perspective, here are several things to have in mind while thinking about HTTPS:
 
@@ -174,15 +269,13 @@ Now, from a developer's perspective, here are several things to have in mind whi
 * By default, that would mean that you can only have one HTTPS certificate per IP address.
     * No matter how big your server is or how small each application you have on it might be.
     * There is a solution to this, however.
-* There's an extension to the TLS protocol (the one handling the encryption at the TCP level, before HTTP) called <a href="https://en.wikipedia.org/wiki/Server_Name_Indication" target="_blank"><abbr title="Server Name Indication">SNI</abbr></a>.
+* There's an extension to the TLS protocol (the one handling the encryption at the TCP level, before HTTP) called <a href="https://en.wikipedia.org/wiki/Server_Name_Indication" class="external-link" target="_blank"><abbr title="Server Name Indication">SNI</abbr></a>.
     * This SNI extension allows one single server (with a single IP address) to have several HTTPS certificates and serve multiple HTTPS domains/applications.
     * For this to work, a single component (program) running on the server, listening on the public IP address, must have all the HTTPS certificates in the server.
 * After obtaining a secure connection, the communication protocol is still HTTP.
     * The contents are encrypted, even though they are being sent with the HTTP protocol.
 
-
-It is a common practice to have one program/HTTP server running on the server (the machine, host, etc.) and managing all the HTTPS parts : sending the decrypted HTTP requests to the actual HTTP application running in the same server (the **FastAPI** application, in this case), take the HTTP response from the application, encrypt it using the appropriate certificate and sending it back to the client using HTTPS. This server is often called a <a href="https://en.wikipedia.org/wiki/TLS_termination_proxy" target="_blank">TLS Termination Proxy</a>.
-
+It is a common practice to have one program/HTTP server running on the server (the machine, host, etc.) and managing all the HTTPS parts : sending the decrypted HTTP requests to the actual HTTP application running in the same server (the **FastAPI** application, in this case), take the HTTP response from the application, encrypt it using the appropriate certificate and sending it back to the client using HTTPS. This server is often called a <a href="https://en.wikipedia.org/wiki/TLS_termination_proxy" class="external-link" target="_blank">TLS Termination Proxy</a>.
 
 ### Let's Encrypt
 
@@ -190,7 +283,7 @@ Before Let's Encrypt, these HTTPS certificates were sold by trusted third-partie
 
 The process to acquire one of these certificates used to be cumbersome, require quite some paperwork and the certificates were quite expensive.
 
-But then <a href="https://letsencrypt.org/" target="_blank">Let's Encrypt</a> was created.
+But then <a href="https://letsencrypt.org/" class="external-link" target="_blank">Let's Encrypt</a> was created.
 
 It is a project from the Linux Foundation. It provides HTTPS certificates for free. In an automated way. These certificates use all the standard cryptographic security, and are short lived (about 3 months), so the security is actually better because of their reduced lifespan.
 
@@ -198,10 +291,9 @@ The domains are securely verified and the certificates are generated automatical
 
 The idea is to automate the acquisition and renewal of these certificates, so that you can have secure HTTPS, for free, forever.
 
-
 ### Traefik
 
-<a href="https://traefik.io/" target="_blank">Traefik</a> is a high performance reverse proxy / load balancer. It can do the "TLS Termination Proxy" job (apart from other features).
+<a href="https://traefik.io/" class="external-link" target="_blank">Traefik</a> is a high performance reverse proxy / load balancer. It can do the "TLS Termination Proxy" job (apart from other features).
 
 It has integration with Let's Encrypt. So, it can handle all the HTTPS parts, including certificate acquisition and renewal.
 
@@ -211,7 +303,6 @@ It also has integrations with Docker. So, you can declare your domains in each a
 
 With this information and tools, continue with the next section to combine everything.
 
-
 ## Docker Swarm mode cluster with Traefik and HTTPS
 
 You can have a Docker Swarm mode cluster set up in minutes (about 20 min) with a main Traefik handling HTTPS (including certificate acquisition and renewal).
@@ -220,12 +311,11 @@ By using Docker Swarm mode, you can start with a "cluster" of a single machine (
 
 To set up a Docker Swarm Mode cluster with Traefik and HTTPS handling, follow this guide:
 
-### <a href="https://medium.com/@tiangolo/docker-swarm-mode-and-traefik-for-a-https-cluster-20328dba6232" target="_blank">Docker Swarm Mode and Traefik for an HTTPS cluster</a>.
-
+### <a href="https://medium.com/@tiangolo/docker-swarm-mode-and-traefik-for-a-https-cluster-20328dba6232" class="external-link" target="_blank">Docker Swarm Mode and Traefik for an HTTPS cluster</a>
 
 ### Deploy a FastAPI application
 
-The easiest way to set everything up, would be using the <a href="/project-generation/" target="_blank">FastAPI project generator</a>.
+The easiest way to set everything up, would be using the [**FastAPI** Project Generators](project-generation.md){.internal-link target=_blank}.
 
 It is designed to be integrated with this Docker Swarm cluster with Traefik and HTTPS described above.
 
@@ -233,42 +323,71 @@ You can generate a project in about 2 min.
 
 The generated project has instructions to deploy it, doing it takes another 2 min.
 
-
 ## Alternatively, deploy **FastAPI** without Docker
 
 You can deploy **FastAPI** directly without Docker too.
 
 You just need to install an ASGI compatible server like:
 
-* <a href="https://www.uvicorn.org/" target="_blank">Uvicorn</a>, a lightning-fast ASGI server, built on uvloop and httptools.
+=== "Uvicorn"
 
-```bash
-pip install uvicorn
-```
+    * <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a>, a lightning-fast ASGI server, built on uvloop and httptools.
 
-* <a href="https://gitlab.com/pgjones/hypercorn" target="_blank">Hypercorn</a>, an ASGI server also compatible with HTTP/2.
+    <div class="termy">
 
-```bash
-pip install hypercorn
-```
+    ```console
+    $ pip install uvicorn
 
-...or any other ASGI server.
+    ---> 100%
+    ```
+
+    </div>
+
+=== "Hypercorn"
+
+    * <a href="https://gitlab.com/pgjones/hypercorn" class="external-link" target="_blank">Hypercorn</a>, an ASGI server also compatible with HTTP/2.
+
+    <div class="termy">
+
+    ```console
+    $ pip install hypercorn
+
+    ---> 100%
+    ```
+
+    </div>
+
+    ...or any other ASGI server.
 
 And run your application the same way you have done in the tutorials, but without the `--reload` option, e.g.:
 
-```bash
-uvicorn main:app --host 0.0.0.0 --port 80
-```
+=== "Uvicorn"
 
-or with Hypercorn:
+    <div class="termy">
 
-```bash
-hypercorn main:app --bind 0.0.0.0:80
-```
+    ```console
+    $ uvicorn main:app --host 0.0.0.0 --port 80
+
+    <span style="color: green;">INFO</span>:     Uvicorn running on http://0.0.0.0:80 (Press CTRL+C to quit)
+    ```
+
+    </div>
+
+=== "Hypercorn"
+
+    <div class="termy">
+
+    ```console
+    $ hypercorn main:app --bind 0.0.0.0:80
+
+    Running on 0.0.0.0:8080 over http (CTRL + C to quit)
+    ```
+
+    </div>
 
 You might want to set up some tooling to make sure it is restarted automatically if it stops.
 
-You might also want to install <a href="https://gunicorn.org/" target="_blank">Gunicorn</a> and <a href="https://www.uvicorn.org/#running-with-gunicorn" target="_blank">use it as a manager for Uvicorn</a>, or use Hypercorn with multiple workers.
+You might also want to install <a href="https://gunicorn.org/" class="external-link" target="_blank">Gunicorn</a> and <a href="https://www.uvicorn.org/#running-with-gunicorn" class="external-link" target="_blank">use it as a manager for Uvicorn</a>, or use Hypercorn with multiple workers.
 
 Making sure to fine-tune the number of workers, etc.
 

docs/en/docs/external-links.md

@@ -0,0 +1,123 @@
+# External Links and Articles
+
+**FastAPI** has a great community constantly growing.
+
+There are many posts, articles, tools, and projects, related to **FastAPI**.
+
+Here's an incomplete list of some of them.
+
+!!! tip
+    If you have an article, project, tool, or anything related to **FastAPI** that is not yet listed here, create a <a href="https://github.com/tiangolo/fastapi/edit/master/docs/external-links.md" class="external-link" target="_blank">Pull Request adding it</a>.
+
+## Articles
+
+### English
+
+* <a href="https://medium.com/@williamhayes/fastapi-starlette-debug-vs-prod-5f7561db3a59" class="external-link" target="_blank">FastAPI/Starlette debug vs prod</a> by <a href="https://medium.com/@williamhayes" class="external-link" target="_blank">William Hayes</a>.
+
+* <a href="https://medium.com/data-rebels/fastapi-google-as-an-external-authentication-provider-3a527672cf33" class="external-link" target="_blank">FastAPI — Google as an external authentication provider</a> by <a href="https://medium.com/@nils_29588" class="external-link" target="_blank">Nils de Bruin</a>.
+
+* <a href="https://medium.com/data-rebels/fastapi-how-to-add-basic-and-cookie-authentication-a45c85ef47d3" class="external-link" target="_blank">FastAPI — How to add basic and cookie authentication</a> by <a href="https://medium.com/@nils_29588" class="external-link" target="_blank">Nils de Bruin</a>.
+
+* <a href="https://dev.to/errietta/introduction-to-the-fastapi-python-framework-2n10" class="external-link" target="_blank">Introduction to the fastapi python framework</a> by <a href="https://dev.to/errietta" class="external-link" target="_blank">Errieta Kostala</a>.
+
+* <a href="http://nickc1.github.io/api,/scikit-learn/2019/01/10/scikit-fastapi.html" class="external-link" target="_blank">FastAPI and Scikit-Learn: Easily Deploy Models</a> by <a href="http://nickc1.github.io/" class="external-link" target="_blank">Nick Cortale</a>.
+
+* <a href="https://medium.com/data-rebels/fastapi-authentication-revisited-enabling-api-key-authentication-122dc5975680" class="external-link" target="_blank">FastAPI authentication revisited: Enabling API key authentication</a> by <a href="https://medium.com/@nils_29588" class="external-link" target="_blank">Nils de Bruin</a>.
+
+* <a href="https://blog.bartab.fr/fastapi-logging-on-the-fly/" class="external-link" target="_blank">FastAPI, a simple use case on logging</a> by <a href="https://blog.bartab.fr/" class="external-link" target="_blank">@euri10</a>.
+
+* <a href="https://medium.com/@nico.axtmann95/deploying-a-scikit-learn-model-with-onnx-und-fastapi-1af398268915" class="external-link" target="_blank">Deploying a scikit-learn model with ONNX and FastAPI</a> by <a href="https://www.linkedin.com/in/nico-axtmann" class="external-link" target="_blank">Nico Axtmann</a>.
+
+* <a href="https://geekflare.com/python-asynchronous-web-frameworks/" class="external-link" target="_blank">Top 5 Asynchronous Web Frameworks for Python</a> by <a href="https://geekflare.com/author/ankush/" class="external-link" target="_blank">Ankush Thakur</a> on <a href="https://geekflare.com" class="external-link" target="_blank">GeekFlare</a>.
+
+* <a href="https://medium.com/@gntrm/jwt-authentication-with-fastapi-and-aws-cognito-1333f7f2729e" class="external-link" target="_blank">JWT Authentication with FastAPI and AWS Cognito</a> by <a href="https://twitter.com/gntrm" class="external-link" target="_blank">Johannes Gontrum</a>.
+
+* <a href="https://towardsdatascience.com/how-to-deploy-a-machine-learning-model-dc51200fe8cf" class="external-link" target="_blank">How to Deploy a Machine Learning Model</a> by <a href="https://www.linkedin.com/in/mgrootendorst/" class="external-link" target="_blank">Maarten Grootendorst</a> on <a href="https://towardsdatascience.com/" class="external-link" target="_blank">Towards Data Science</a>.
+
+* [Uber: Ludwig v0.2 Adds New Features and Other Improvements to its Deep Learning Toolbox [including a FastAPI server]](https://eng.uber.com/ludwig-v0-2/){.external-link target=_blank} on <a href="https://eng.uber.com" class="external-link" target="_blank">Uber Engineering</a>.
+
+* <a href="https://gitlab.com/euri10/fastapi_cheatsheet" class="external-link" target="_blank">A FastAPI and Swagger UI visual cheatsheet</a> by <a href="https://gitlab.com/euri10" class="external-link" target="_blank">@euri10</a>
+
+* <a href="https://medium.com/@mike.p.moritz/using-docker-compose-to-deploy-a-lightweight-python-rest-api-with-a-job-queue-37e6072a209b" class="external-link" target="_blank">Using Docker Compose to deploy a lightweight Python REST API with a job queue</a> by <a href="https://medium.com/@mike.p.moritz" class="external-link" target="_blank">Mike Moritz</a>.
+
+* <a href="https://robwagner.dev/tortoise-fastapi-setup/" class="external-link" target="_blank">Setting up Tortoise ORM with FastAPI</a> by <a href="https://robwagner.dev/" class="external-link" target="_blank">Rob Wagner</a>.
+
+* <a href="https://dev.to/dbanty/why-i-m-leaving-flask-3ki6" class="external-link" target="_blank">Why I'm Leaving Flask</a> by <a href="https://dev.to/dbanty" class="external-link" target="_blank">Dylan Anthony</a>.
+
+* <a href="https://medium.com/python-data/how-to-deploy-tensorflow-2-0-models-as-an-api-service-with-fastapi-docker-128b177e81f3" class="external-link" target="_blank">How To Deploy Tensorflow 2.0 Models As An API Service With FastAPI & Docker</a> by <a href="https://medium.com/@bbrenyah" class="external-link" target="_blank">Bernard Brenyah</a>.
+
+* <a href="https://testdriven.io/blog/fastapi-crud/" class="external-link" target="_blank">TestDriven.io: Developing and Testing an Asynchronous API with FastAPI and Pytest</a> by <a href="https://testdriven.io/authors/herman/" class="external-link" target="_blank">Michael Herman</a>.
+
+* <a href="https://towardsdatascience.com/deploying-iris-classifications-with-fastapi-and-docker-7c9b83fdec3a" class="external-link" target="_blank">Towards Data Science: Deploying Iris Classifications with FastAPI and Docker</a> by <a href="https://towardsdatascience.com/@mandygu" class="external-link" target="_blank">Mandy Gu</a>.
+
+* <a href="https://medium.com/analytics-vidhya/deploy-machine-learning-models-with-keras-fastapi-redis-and-docker-4940df614ece" class="external-link" target="_blank">Deploy Machine Learning Models with Keras, FastAPI, Redis and Docker</a> by <a href="https://medium.com/@shane.soh" class="external-link" target="_blank">Shane Soh</a>.
+
+* <a href="https://medium.com/@arthur393/another-boilerplate-to-fastapi-azure-pipeline-ci-pytest-3c8d9a4be0bb" class="external-link" target="_blank">Another Boilerplate to FastAPI: Azure Pipeline CI + Pytest</a> by <a href="https://twitter.com/arthurheinrique" class="external-link" target="_blank">Arthur Henrique</a>.
+
+* <a href="https://iwpnd.pw/articles/2020-01/deploy-fastapi-to-aws-lambda" class="external-link" target="_blank">How to continuously deploy a FastAPI to AWS Lambda with AWS SAM</a> by <a href="https://iwpnd.pw" class="external-link" target="_blank">Benjamin Ramser</a>.
+
+* <a href="https://www.tutlinks.com/create-and-deploy-fastapi-app-to-heroku/" class="external-link" target="_blank">Create and Deploy FastAPI app to Heroku without using Docker</a> by <a href="https://www.linkedin.com/in/navule/" class="external-link" target="_blank">Navule Pavan Kumar Rao</a>.
+
+* <a href="https://iwpnd.pw/articles/2020-03/apache-kafka-fastapi-geostream" class="external-link" target="_blank">Apache Kafka producer and consumer with FastAPI and aiokafka</a> by <a href="https://iwpnd.pw" class="external-link" target="_blank">Benjamin Ramser</a>.
+
+### Japanese
+
+* <a href="https://qiita.com/mtitg/items/47770e9a562dd150631d" class="external-link" target="_blank">FastAPI｜DB接続してCRUDするPython製APIサーバーを構築</a> by <a href="https://qiita.com/mtitg" class="external-link" target="_blank">@mtitg</a>.
+
+* <a href="https://qiita.com/ryoryomaru/items/59958ed385b3571d50de" class="external-link" target="_blank">python製の最新APIフレームワーク FastAPI を触ってみた</a> by <a href="https://qiita.com/ryoryomaru" class="external-link" target="_blank">@ryoryomaru</a>.
+
+* <a href="https://qiita.com/angel_katayoku/items/0e1f5dbbe62efc612a78" class="external-link" target="_blank">FastAPIでCORSを回避</a> by <a href="https://qiita.com/angel_katayoku" class="external-link" target="_blank">@angel_katayoku</a>.
+
+* <a href="https://qiita.com/angel_katayoku/items/4fbc1a4e2b33fa2237d2" class="external-link" target="_blank">FastAPIをMySQLと接続してDockerで管理してみる</a> by <a href="https://qiita.com/angel_katayoku" class="external-link" target="_blank">@angel_katayoku</a>.
+
+* <a href="https://qiita.com/angel_katayoku/items/8a458a8952f50b73f420" class="external-link" target="_blank">FastAPIでPOSTされたJSONのレスポンスbodyを受け取る</a> by <a href="https://qiita.com/angel_katayoku" class="external-link" target="_blank">@angel_katayoku</a>.
+
+* <a href="https://qiita.com/hikarut/items/b178af2e2440c67c6ac4" class="external-link" target="_blank">フロントエンド開発者向けのDockerによるPython開発環境構築</a> by <a href="https://qiita.com/hikarut" class="external-link" target="_blank">Hikaru Takahashi</a>.
+
+* <a href="https://rightcode.co.jp/blog/information-technology/fastapi-tutorial-todo-apps-environment" class="external-link" target="_blank">【第1回】FastAPIチュートリアル: ToDoアプリを作ってみよう【環境構築編】</a> by <a href="https://rightcode.co.jp/author/jun" class="external-link" target="_blank">ライトコードメディア編集部</a>
+
+* <a href="https://rightcode.co.jp/blog/information-technology/fastapi-tutorial-todo-apps-model-building" class="external-link" target="_blank">【第2回】FastAPIチュートリアル: ToDoアプリを作ってみよう【モデル構築編】</a> by <a href="https://rightcode.co.jp/author/jun" class="external-link" target="_blank">ライトコードメディア編集部</a>
+
+* <a href="https://rightcode.co.jp/blog/information-technology/fastapi-tutorial-todo-apps-authentication-user-registration" class="external-link" target="_blank">【第3回】FastAPIチュートリアル: toDoアプリを作ってみよう【認証・ユーザ登録編】</a> by <a href="https://rightcode.co.jp/author/jun" class="external-link" target="_blank">ライトコードメディア編集部</a>
+
+* <a href="https://rightcode.co.jp/blog/information-technology/fastapi-tutorial-todo-apps-admin-page-improvement" class="external-link" target="_blank">【第4回】FastAPIチュートリアル: toDoアプリを作ってみよう【管理者ページ改良編】</a> by <a href="https://rightcode.co.jp/author/jun" class="external-link" target="_blank">ライトコードメディア編集部</a>
+
+* <a href="https://qiita.com/bee2/items/0ad260ab9835a2087dae" class="external-link" target="_blank">PythonのWeb frameworkのパフォーマンス比較 (Django, Flask, responder, FastAPI, japronto)</a> by <a href="https://qiita.com/bee2" class="external-link" target="_blank">@bee2</a>.
+
+* <a href="https://qiita.com/bee2/items/75d9c0d7ba20e7a4a0e9" class="external-link" target="_blank">[FastAPI] Python製のASGI Web フレームワーク FastAPIに入門する</a> by <a href="https://qiita.com/bee2" class="external-link" target="_blank">@bee2</a>.
+
+### Chinese
+
+* <a href="https://cloud.tencent.com/developer/article/1431448" class="external-link" target="_blank">使用FastAPI框架快速构建高性能的api服务</a> by <a href="https://cloud.tencent.com/developer/user/5471722" class="external-link" target="_blank">逍遥散人</a>.
+
+* <a href="https://wxq0309.github.io/" class="external-link" target="_blank">FastAPI框架中文文档</a> by <a href="https://wxq0309.github.io/" class="external-link" target="_blank">何大仙</a>.
+
+### Vietnamese
+
+* <a href="https://fullstackstation.com/fastapi-trien-khai-bang-docker/" class="external-link" target="_blank">FASTAPI: TRIỂN KHAI BẰNG DOCKER</a> by <a href="https://fullstackstation.com/author/figonking/" class="external-link" target="_blank">Nguyễn Nhân</a>.
+
+### Russian
+
+* <a href="https://habr.com/ru/post/454440/" class="external-link" target="_blank">Мелкая питонячая радость #2: Starlette - Солидная примочка – FastAPI</a> by <a href="https://habr.com/ru/users/57uff3r/" class="external-link" target="_blank">Andrey Korchak</a>.
+
+* <a href="https://habr.com/ru/post/478620/" class="external-link" target="_blank">Почему Вы должны попробовать FastAPI?</a> by <a href="https://github.com/prostomarkeloff" class="external-link" target="_blank">prostomarkeloff</a>.
+
+### German
+
+* <a href="https://blog.codecentric.de/2019/08/inbetriebnahme-eines-scikit-learn-modells-mit-onnx-und-fastapi/" class="external-link" target="_blank">Inbetriebnahme eines scikit-learn-Modells mit ONNX und FastAPI</a> by <a href="https://twitter.com/_nicoax" class="external-link" target="_blank">Nico Axtmann</a>.
+
+## Podcasts
+
+* <a href="https://pythonbytes.fm/episodes/show/123/time-to-right-the-py-wrongs?time_in_sec=855" class="external-link" target="_blank">FastAPI on PythonBytes</a> by <a href="https://pythonbytes.fm/" class="external-link" target="_blank">Python Bytes FM</a>.
+
+## Talks
+
+* <a href="https://www.youtube.com/watch?v=3DLwPcrE5mA" class="external-link" target="_blank">PyCon UK 2019: FastAPI from the ground up</a> by <a href="https://twitter.com/chriswithers13" class="external-link" target="_blank">Chris Withers</a>.
+
+## Projects
+
+Latest GitHub projects with the topic `fastapi`:
+
+<div class="github-topic-projects">
+</div>

docs/en/docs/features.md

@@ -1,3 +1,4 @@
+# Features
 
 ## FastAPI features
 
@@ -5,8 +6,8 @@
 
 ### Based on open standards
 
-* <a href="https://github.com/OAI/OpenAPI-Specification" target="_blank"><strong>OpenAPI</strong></a> for API creation, including declarations of <abbr title="also known as: endpoints, routes">path</abbr> <abbr title="also known as HTTP methods, as POST, GET, PUT, DELETE">operations</abbr>, parameters, body requests, security, etc.
-* Automatic data model documentation with <a href="http://json-schema.org/" target="_blank"><strong>JSON Schema</strong></a> (as OpenAPI itself is based on JSON Schema).
+* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> for API creation, including declarations of <abbr title="also known as: endpoints, routes">path</abbr> <abbr title="also known as HTTP methods, as POST, GET, PUT, DELETE">operations</abbr>, parameters, body requests, security, etc.
+* Automatic data model documentation with <a href="http://json-schema.org/" class="external-link" target="_blank"><strong>JSON Schema</strong></a> (as OpenAPI itself is based on JSON Schema).
 * Designed around these standards, after a meticulous study. Instead of an afterthought layer on top.
 * This also allows using automatic **client code generation** in many languages.
 
@@ -14,20 +15,19 @@
 
 Interactive API documentation and exploration web user interfaces. As the framework is based on OpenAPI, there are multiple options, 2 included by default.
 
-* <a href="https://github.com/swagger-api/swagger-ui" target="_blank"><strong>Swagger UI</strong></a>, with interactive exploration, call and test your API directly from the browser.
+* <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank"><strong>Swagger UI</strong></a>, with interactive exploration, call and test your API directly from the browser.
 
-![Swagger UI interaction](img/index/index-03-swagger-02.png)
+![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)
 
-* Alternative API documentation with <a href="https://github.com/Rebilly/ReDoc" target="_blank"><strong>ReDoc</strong></a>.
-
-![ReDoc](img/index/index-06-redoc-02.png)
+* Alternative API documentation with <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>.
 
+![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)
 
 ### Just Modern Python
 
 It's all based on standard **Python 3.6 type** declarations (thanks to Pydantic). No new syntax to learn. Just standard modern Python.
 
-If you need a 2 minute refresher of how to use Python types (even if you don't use FastAPI), check the tutorial section: [Python types](python-types.md).
+If you need a 2 minute refresher of how to use Python types (even if you don't use FastAPI), check the short tutorial: [Python Types](python-types.md){.internal-link target=_blank}.
 
 You write standard Python with types:
 
@@ -66,14 +66,14 @@ my_second_user: User = User(**second_user_data)
 
 !!! info
     `**second_user_data` means:
-    
+
     Pass the keys and values of the `second_user_data` dict directly as key-value arguments, equivalent to: `User(id=4, name="Mary", joined="2018-11-30")`
 
 ### Editor support
 
-All the framework was designed to be easy and intuitive to use, all the decisions where tested on multiple editors even before starting development, to ensure the best development experience.
+All the framework was designed to be easy and intuitive to use, all the decisions were tested on multiple editors even before starting development, to ensure the best development experience.
 
-In the last Python developer survey it was clear <a href="https://www.jetbrains.com/research/python-developers-survey-2017/#tools-and-features" target="_blank">that the most used feature is "autocompletion"</a>. 
+In the last Python developer survey it was clear <a href="https://www.jetbrains.com/research/python-developers-survey-2017/#tools-and-features" class="external-link" target="_blank">that the most used feature is "autocompletion"</a>.
 
 The whole **FastAPI** framework is based to satisfy that. Autocompletion works everywhere.
 
@@ -81,13 +81,13 @@ You will rarely need to come back to the docs.
 
 Here's how your editor might help you:
 
-* in <a href="https://code.visualstudio.com/" target="_blank">Visual Studio Code</a>:
+* in <a href="https://code.visualstudio.com/" class="external-link" target="_blank">Visual Studio Code</a>:
 
-![editor support](img/vscode-completion.png)
+![editor support](https://fastapi.tiangolo.com/img/vscode-completion.png)
 
-* in <a href="https://www.jetbrains.com/pycharm/" target="_blank">PyCharm</a>:
+* in <a href="https://www.jetbrains.com/pycharm/" class="external-link" target="_blank">PyCharm</a>:
 
-![editor support](img/pycharm-completion.png)
+![editor support](https://fastapi.tiangolo.com/img/pycharm-completion.png)
 
 You will get completion in code you might even consider impossible before. As for example, the `price` key inside a JSON body (that could have been nested) that comes from a request.
 
@@ -122,13 +122,13 @@ Security and authentication integrated. Without any compromise with databases or
 All the security schemes defined in OpenAPI, including:
 
 * HTTP Basic.
-* **OAuth2** (also with **JWT tokens**). Check the [tutorial on OAuth2 with JWT](tutorial/security/oauth2-jwt.md).
+* **OAuth2** (also with **JWT tokens**). Check the tutorial on [OAuth2 with JWT](tutorial/security/oauth2-jwt.md){.internal-link target=_blank}.
 * API keys in:
     * Headers.
     * Query parameters.
     * Cookies, etc.
 
-Plus all the security features from Starlette (including **session cookies**). 
+Plus all the security features from Starlette (including **session cookies**).
 
 All built as reusable tools and components that are easy to integrate with your systems, data stores, relational and NoSQL databases, etc.
 
@@ -137,19 +137,17 @@ All built as reusable tools and components that are easy to integrate with your
 FastAPI includes an extremely easy to use, but extremely powerful <abbr title='also known as "components", "resources", "services", "providers"'><strong>Dependency Injection</strong></abbr> system.
 
 * Even dependencies can have dependencies, creating a hierarchy or **"graph" of dependencies**.
-* All **automatically handled** by the framework. 
+* All **automatically handled** by the framework.
 * All the dependencies can require data from requests and **augment the path operation** constraints and automatic documentation.
-* **Automatic validation** even for path operation parameters defined in dependencies.
+* **Automatic validation** even for *path operation* parameters defined in dependencies.
 * Support for complex user authentication systems, **database connections**, etc.
 * **No compromise** with databases, frontends, etc. But easy integration with all of them.
 
-
 ### Unlimited "plug-ins"
 
-Or in other way, no need for them, import and use the code you need. 
-
-Any integration is designed to be so simple to use (with dependencies) that you can create a "plug-in" for your application in 2 lines of code using the same structure and syntax used for your path operations.
+Or in other way, no need for them, import and use the code you need.
 
+Any integration is designed to be so simple to use (with dependencies) that you can create a "plug-in" for your application in 2 lines of code using the same structure and syntax used for your *path operations*.
 
 ### Tested
 
@@ -159,13 +157,13 @@ Any integration is designed to be so simple to use (with dependencies) that you
 
 ## Starlette features
 
-**FastAPI** is fully compatible with (and based on) <a href="https://www.starlette.io/" target="_blank"><strong>Starlette</strong></a>. So, any additional Starlette code you have, will also work.
+**FastAPI** is fully compatible with (and based on) <a href="https://www.starlette.io/" class="external-link" target="_blank"><strong>Starlette</strong></a>. So, any additional Starlette code you have, will also work.
 
 `FastAPI` is actually a sub-class of `Starlette`. So, if you already know or use Starlette, most of the functionality will work the same way.
 
 With **FastAPI** you get all of **Starlette**'s features (as FastAPI is just Starlette on steroids):
 
-* Seriously impressive performance. It is <a href="https://github.com/encode/starlette#performance" target="_blank">one of the fastest Python frameworks available, on par with **NodeJS** and **Go**</a>.
+* Seriously impressive performance. It is <a href="https://github.com/encode/starlette#performance" class="external-link" target="_blank">one of the fastest Python frameworks available, on par with **NodeJS** and **Go**</a>.
 * **WebSocket** support.
 * **GraphQL** support.
 * In-process background tasks.
@@ -178,7 +176,7 @@ With **FastAPI** you get all of **Starlette**'s features (as FastAPI is just Sta
 
 ## Pydantic features
 
-**FastAPI** is fully compatible with (and based on) <a href="https://pydantic-docs.helpmanual.io" target="_blank"><strong>Pydantic</strong></a>. So, any additional Pydantic code you have, will also work.
+**FastAPI** is fully compatible with (and based on) <a href="https://pydantic-docs.helpmanual.io" class="external-link" target="_blank"><strong>Pydantic</strong></a>. So, any additional Pydantic code you have, will also work.
 
 Including external libraries also based on Pydantic, as <abbr title="Object-Relational Mapper">ORM</abbr>s, <abbr title="Object-Document Mapper">ODM</abbr>s for databases.
 
@@ -188,13 +186,13 @@ The same applies the other way around, in many cases you can just pass the objec
 
 With **FastAPI** you get all of **Pydantic**'s features (as FastAPI is based on Pydantic for all the data handling):
 
-* **No brainfuck**: 
+* **No brainfuck**:
     * No new schema definition micro-language to learn.
     * If you know Python types you know how to use Pydantic.
 * Plays nicely with your **<abbr title="Integrated Development Environment, similar to a code editor">IDE</abbr>/<abbr title="A program that checks for code errors">linter</abbr>/brain**:
     * Because pydantic data structures are just instances of classes you define; auto-completion, linting, mypy and your intuition should all work properly with your validated data.
 * **Fast**:
-    * in <a href="https://pydantic-docs.helpmanual.io/#benchmarks-tag" target="_blank">benchmarks</a> Pydantic is faster than all other tested libraries.
+    * in <a href="https://pydantic-docs.helpmanual.io/#benchmarks-tag" class="external-link" target="_blank">benchmarks</a> Pydantic is faster than all other tested libraries.
 * Validate **complex structures**:
     * Use of hierarchical Pydantic models, Python `typing`’s `List` and `Dict`, etc.
     * And validators allow complex data schemas to be clearly and easily defined, checked and documented as JSON Schema.

docs/en/docs/help-fastapi.md

@@ -1,4 +1,6 @@
-Are you liking **FastAPI**?
+# Help FastAPI - Get Help
+
+Do you like **FastAPI**?
 
 Would you like to help FastAPI, other users, and the author?
 
@@ -8,17 +10,15 @@ There are very simple ways to help (several involve just one or two clicks).
 
 And there are several ways to get help too.
 
-
 ## Star **FastAPI** in GitHub
 
-You can "star" FastAPI in GitHub (clicking the star button at the top right): <a href="https://github.com/tiangolo/fastapi" target="_blank">https://github.com/tiangolo/fastapi</a>.
+You can "star" FastAPI in GitHub (clicking the star button at the top right): <a href="https://github.com/tiangolo/fastapi" class="external-link" target="_blank">https://github.com/tiangolo/fastapi</a>.
 
 By adding a star, other users will be able to find it more easily and see that it has been already useful for others.
 
-
 ## Watch the GitHub repository for releases
 
-You can "watch" FastAPI in GitHub (clicking the "watch" button at the top right): <a href="https://github.com/tiangolo/fastapi" target="_blank">https://github.com/tiangolo/fastapi</a>.
+You can "watch" FastAPI in GitHub (clicking the "watch" button at the top right): <a href="https://github.com/tiangolo/fastapi" class="external-link" target="_blank">https://github.com/tiangolo/fastapi</a>.
 
 There you can select "Releases only".
 
@@ -30,33 +30,32 @@ Doing it, you will receive notifications (in your email) whenever there's a new
     <img src="https://badges.gitter.im/tiangolo/fastapi.svg" alt="Join the chat at https://gitter.im/tiangolo/fastapi">
 </a>
 
-Join the chat on Gitter: <a href="https://gitter.im/tiangolo/fastapi" target="_blank">https://gitter.im/tiangolo/fastapi</a>.
+Join the chat on Gitter: <a href="https://gitter.im/tiangolo/fastapi" class="external-link" target="_blank">https://gitter.im/tiangolo/fastapi</a>.
 
 There you can ask quick questions, help others, share ideas, etc.
 
 ## Connect with the author
 
-You can connect with <a href="https://tiangolo.com" target="_blank">me (Sebastián Ramírez / `tiangolo`)</a>, the author.
+You can connect with <a href="https://tiangolo.com" class="external-link" target="_blank">me (Sebastián Ramírez / `tiangolo`)</a>, the author.
 
 You can:
 
-* <a href="https://github.com/tiangolo" target="_blank">Follow me on **GitHub**</a>.
+* <a href="https://github.com/tiangolo" class="external-link" target="_blank">Follow me on **GitHub**</a>.
     * See other Open Source projects I have created that could help you.
     * Follow me to see when I create a new Open Source project.
-* <a href="https://twitter.com/tiangolo" target="_blank">Follow me on **Twitter**</a>.
+* <a href="https://twitter.com/tiangolo" class="external-link" target="_blank">Follow me on **Twitter**</a>.
     * Tell me how you use FastAPI (I love to hear that).
     * Ask questions.
-* <a href="https://www.linkedin.com/in/tiangolo/" target="_blank">Connect with me on **Linkedin**</a>.
+* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">Connect with me on **Linkedin**</a>.
     * Talk to me.
     * Endorse me or recommend me :)
-* <a href="https://medium.com/@tiangolo" target="_blank">Read what I write (or follow me) on **Medium**</a>.
+* <a href="https://medium.com/@tiangolo" class="external-link" target="_blank">Read what I write (or follow me) on **Medium**</a>.
     * Read other ideas, articles and tools I have created.
     * Follow me to see when I publish something new.
 
-
 ## Tweet about **FastAPI**
 
-<a href="https://twitter.com/compose/tweet?text=I'm loving FastAPI because... https://github.com/tiangolo/fastapi cc @tiangolo" target="_blank">Tweet about **FastAPI**</a> and let me and others know why you like it.
+<a href="https://twitter.com/compose/tweet?text=I'm loving FastAPI because... https://github.com/tiangolo/fastapi cc @tiangolo" class="external-link" target="_blank">Tweet about **FastAPI**</a> and let me and others know why you like it.
 
 ## Let me know how are you using **FastAPI**
 
@@ -64,22 +63,21 @@ I love to hear about how **FastAPI** is being used, what have you liked in it, i
 
 You can let me know:
 
-* <a href="https://twitter.com/compose/tweet?text=Hey @tiangolo, I'm using FastAPI at..." target="_blank">On **Twitter**</a>.
-* <a href="https://www.linkedin.com/in/tiangolo/" target="_blank">On **Linkedin**</a>.
-* <a href="https://medium.com/@tiangolo" target="_blank">On **Medium**</a>.
+* <a href="https://twitter.com/compose/tweet?text=Hey @tiangolo, I'm using FastAPI at..." class="external-link" target="_blank">On **Twitter**</a>.
+* <a href="https://www.linkedin.com/in/tiangolo/" class="external-link" target="_blank">On **Linkedin**</a>.
+* <a href="https://medium.com/@tiangolo" class="external-link" target="_blank">On **Medium**</a>.
 
 ## Vote for FastAPI
 
-* <a href="https://github.com/vinta/awesome-python/pull/1209" target="_blank">Vote to include **FastAPI** in `awesome-python`</a>.
-* <a href="https://www.slant.co/options/34241/~fastapi-review" target="_blank">Vote for **FastAPI** in Slant</a>.
+* <a href="https://www.slant.co/options/34241/~fastapi-review" class="external-link" target="_blank">Vote for **FastAPI** in Slant</a>.
 
 ## Help others with issues in GitHub
 
-You can see <a href="https://github.com/tiangolo/fastapi/issues" target="_blank">existing issues</a> and try and help others.
+You can see <a href="https://github.com/tiangolo/fastapi/issues" class="external-link" target="_blank">existing issues</a> and try and help others.
 
 ## Watch the GitHub repository
 
-You can "watch" FastAPI in GitHub (clicking the "watch" button at the top right): <a href="https://github.com/tiangolo/fastapi" target="_blank">https://github.com/tiangolo/fastapi</a>.
+You can "watch" FastAPI in GitHub (clicking the "watch" button at the top right): <a href="https://github.com/tiangolo/fastapi" class="external-link" target="_blank">https://github.com/tiangolo/fastapi</a>.
 
 If you select "Watching" instead of "Releases only", you will receive notifications when someone creates a new issue.
 
@@ -87,7 +85,7 @@ Then you can try and help them solving those issues.
 
 ## Create issues
 
-You can <a href="https://github.com/tiangolo/fastapi/issues/new/choose" target="_blank">create a new issue</a> in the GitHub repository, for example to:
+You can <a href="https://github.com/tiangolo/fastapi/issues/new/choose" class="external-link" target="_blank">create a new issue</a> in the GitHub repository, for example to:
 
 * Report a bug/issue.
 * Suggest a new feature.
@@ -95,13 +93,19 @@ You can <a href="https://github.com/tiangolo/fastapi/issues/new/choose" target="
 
 ## Create a Pull Request
 
-You can <a href="https://github.com/tiangolo/fastapi" target="_blank">create a Pull Request</a>, for example:
+You can <a href="https://github.com/tiangolo/fastapi" class="external-link" target="_blank">create a Pull Request</a>, for example:
 
 * To fix a typo you found on the documentation.
 * To propose new documentation sections.
 * To fix an existing issue/bug.
 * To add a new feature.
 
+## Sponsor the author
+
+You can also financially support the author (me) through <a href="https://github.com/sponsors/tiangolo" class="external-link" target="_blank">GitHub sponsors</a>.
+
+There you could buy me a coffee ☕️ to say thanks 😄.
+
 ---
 
 Thanks!

docs/en/docs/history-design-future.md

@@ -1,10 +1,11 @@
-Some time ago, <a href="https://github.com/tiangolo/fastapi/issues/3#issuecomment-454956920" target="_blank">a **FastAPI** user asked</a>:
+# History, Design and Future
+
+Some time ago, <a href="https://github.com/tiangolo/fastapi/issues/3#issuecomment-454956920" class="external-link" target="_blank">a **FastAPI** user asked</a>:
 
 > What’s the history of this project? It seems to have come from nowhere to awesome in a few weeks [...]
 
 Here's a little bit of that history.
 
-
 ## Alternatives
 
 I have been creating APIs with complex requirements for several years (Machine Learning, distributed systems, asynchronous jobs, NoSQL databases, etc), leading several teams of developers.
@@ -13,7 +14,7 @@ As part of that, I needed to investigate, test and use many alternatives.
 
 The history of **FastAPI** is in great part the history of its predecessors.
 
-As said in the section <a href="https://fastapi.tiangolo.com/alternatives/" target="_blank">Alternatives</a>:
+As said in the section [Alternatives](alternatives.md){.internal-link target=_blank}:
 
 <blockquote markdown="1">
 
@@ -27,7 +28,6 @@ But at some point, there was no other option than creating something that provid
 
 </blockquote>
 
-
 ## Investigation
 
 By using all the previous alternatives I had the chance to learn from all of them, take ideas, and combine them in the best way I could find for myself and the teams of developers I have worked with.
@@ -38,14 +38,13 @@ Also, the best approach was to use already existing standards.
 
 So, before even starting to code **FastAPI**, I spent several months studying the specs for OpenAPI, JSON Schema, OAuth2, etc. Understanding their relationship, overlap, and differences.
 
-
 ## Design
 
 Then I spent some time designing the developer "API" I wanted to have as a user (as a developer using FastAPI).
 
 I tested several ideas in the most popular Python editors: PyCharm, VS Code, Jedi based editors.
 
-By the last <a href="https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools" target="_blank">Python Developer Survey</a>, that covers about 80% of the users.
+By the last <a href="https://www.jetbrains.com/research/python-developers-survey-2018/#development-tools" class="external-link" target="_blank">Python Developer Survey</a>, that covers about 80% of the users.
 
 It means that **FastAPI** was specifically tested with the editors used by 80% of the Python developers. And as most of the other editors tend to work similarly, all its benefits should work for virtually all editors.
 
@@ -53,21 +52,18 @@ That way I could find the best ways to reduce code duplication as much as possib
 
 All in a way that provided the best development experience for all the developers.
 
-
 ## Requirements
 
-After testing several alternatives, I decided that I was going to use <a href="https://pydantic-docs.helpmanual.io/" target="_blank">**Pydantic**</a> for its advantages.
+After testing several alternatives, I decided that I was going to use <a href="https://pydantic-docs.helpmanual.io/" class="external-link" target="_blank">**Pydantic**</a> for its advantages.
 
 Then I contributed to it, to make it fully compliant with JSON Schema, to support different ways to define constraint declarations, and to improve editor support (type checks, autocompletion) based on the tests in several editors.
 
-During the development, I also contributed to <a href="https://www.starlette.io/" target="_blank">**Starlette**</a>, the other key requirement.
-
+During the development, I also contributed to <a href="https://www.starlette.io/" class="external-link" target="_blank">**Starlette**</a>, the other key requirement.
 
 ## Development
 
 By the time I started creating **FastAPI** itself, most of the pieces were already in place, the design was defined, the requirements and tools were ready, and the knowledge about the standards and specifications was clear and fresh.
 
-
 ## Future
 
 By this point, it's already clear that **FastAPI** with its ideas is being useful for many people.
@@ -80,4 +76,4 @@ But still, there are many improvements and features to come.
 
 **FastAPI** has a great future ahead.
 
-And <a href="https://fastapi.tiangolo.com/help-fastapi/" target="_blank">your help</a> is greatly appreciated.
+And [your help](help-fastapi.md){.internal-link target=_blank} is greatly appreciated.