From f40b538d9d35b68fb6bdb22a9b17b6cb7f2a6683 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B6rn=20Friedrich=20Dreyer?= Date: Thu, 8 Jun 2023 17:29:34 +0200 Subject: [PATCH] use otelhttp tracing middleware MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Jörn Friedrich Dreyer --- go.mod | 3 +- go.sum | 6 +- services/proxy/pkg/command/server.go | 7 + .../instrumentation/net/http/otelhttp/LICENSE | 201 ++++++++ .../net/http/otelhttp/client.go | 61 +++ .../net/http/otelhttp/common.go | 46 ++ .../net/http/otelhttp/config.go | 208 ++++++++ .../instrumentation/net/http/otelhttp/doc.go | 18 + .../net/http/otelhttp/handler.go | 269 ++++++++++ .../http/otelhttp/internal/semconvutil/gen.go | 21 + .../otelhttp/internal/semconvutil/httpconv.go | 460 ++++++++++++++++++ .../otelhttp/internal/semconvutil/netconv.go | 368 ++++++++++++++ .../net/http/otelhttp/labeler.go | 65 +++ .../net/http/otelhttp/transport.go | 193 ++++++++ .../net/http/otelhttp/version.go | 28 ++ .../instrumentation/net/http/otelhttp/wrap.go | 99 ++++ vendor/modules.txt | 6 +- 17 files changed, 2055 insertions(+), 4 deletions(-) create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/gen.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/httpconv.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/netconv.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/version.go create mode 100644 vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go diff --git a/go.mod b/go.mod index 7ec2524a42..49920bd617 100644 --- a/go.mod +++ b/go.mod @@ -72,7 +72,7 @@ require ( github.com/shamaton/msgpack/v2 v2.1.1 github.com/sirupsen/logrus v1.9.0 github.com/spf13/cobra v1.7.0 - github.com/stretchr/testify v1.8.3 + github.com/stretchr/testify v1.8.4 github.com/test-go/testify v1.1.4 github.com/thejerf/suture/v4 v4.0.2 github.com/tus/tusd v1.10.1 @@ -80,6 +80,7 @@ require ( github.com/xhit/go-simple-mail/v2 v2.13.0 go-micro.dev/v4 v4.9.0 go.etcd.io/bbolt v1.3.7 + go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.1-0.20230608065455-5cc3715df180 go.opentelemetry.io/contrib/zpages v0.42.0 go.opentelemetry.io/otel v1.16.0 go.opentelemetry.io/otel/exporters/jaeger v1.15.1 diff --git a/go.sum b/go.sum index f7e567be78..05f0f170b3 100644 --- a/go.sum +++ b/go.sum @@ -1576,8 +1576,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/ github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals= github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU= github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4= -github.com/stretchr/testify v1.8.3 h1:RP3t2pwF7cMEbC1dqtB6poj3niw/9gnV4Cjg5oW5gtY= -github.com/stretchr/testify v1.8.3/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo= +github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk= +github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo= github.com/stvp/go-udp-testing v0.0.0-20201019212854-469649b16807/go.mod h1:7jxmlfBCDBXRzr0eAQJ48XC1hBu1np4CS5+cHEYfwpc= github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw= github.com/tchap/go-patricia/v2 v2.3.1 h1:6rQp39lgIYZ+MHmdEq4xzuk1t7OdC35z/xm0BGhTkes= @@ -1675,6 +1675,8 @@ go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0= go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo= go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.36.4 h1:PRXhsszxTt5bbPriTjmaweWUsAnJYeWBhUMLRetUgBU= go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.36.4/go.mod h1:05eWWy6ZWzmpeImD3UowLTB3VjDMU1yxQ+ENuVWDM3c= +go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.1-0.20230608065455-5cc3715df180 h1:vx3BgH4QDw5zqcu8MPC43KPznuLJt7Ly6so2cUUwhu8= +go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.1-0.20230608065455-5cc3715df180/go.mod h1:/Q7SZ3KqNy3qTGotS1MKC8lO5z0CFSeacGbjfgMa4sk= go.opentelemetry.io/contrib/zpages v0.42.0 h1:hFscXKQ9PTjyIVmAr6zIV8cMoiEeR9lPIwPVqHi8+5Q= go.opentelemetry.io/contrib/zpages v0.42.0/go.mod h1:qRJBEfB0iwRKrYImq5qfwTolmY8HXvZBRucvhuTVQZw= go.opentelemetry.io/otel v1.16.0 h1:Z7GVAX/UkAXPKsy94IU+i6thsQS4nb7LviLpnaNeW8s= diff --git a/services/proxy/pkg/command/server.go b/services/proxy/pkg/command/server.go index 5c89ffa516..2bd5aff62b 100644 --- a/services/proxy/pkg/command/server.go +++ b/services/proxy/pkg/command/server.go @@ -40,6 +40,7 @@ import ( "github.com/owncloud/ocis/v2/services/proxy/pkg/userroles" "github.com/urfave/cli/v2" microstore "go-micro.dev/v4/store" + "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" ) // Server is the entrypoint for the server command. @@ -377,6 +378,12 @@ func loadMiddlewares(ctx context.Context, logger log.Logger, cfg *config.Config, return alice.New( // first make sure we log all requests and redirect to https if necessary + otelhttp.NewMiddleware("proxy", + otelhttp.WithTracerProvider(tracing.TraceProvider), + otelhttp.WithSpanNameFormatter(func(name string, r *http.Request) string { + return fmt.Sprintf("%s %s", r.Method, r.URL.Path) + }), + ), middleware.Tracer(), pkgmiddleware.TraceContext, chimiddleware.RealIP, diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE new file mode 100644 index 0000000000..261eeb9e9f --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go new file mode 100644 index 0000000000..92b8cf73c9 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go @@ -0,0 +1,61 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "context" + "io" + "net/http" + "net/url" + "strings" +) + +// DefaultClient is the default Client and is used by Get, Head, Post and PostForm. +// Please be careful of intitialization order - for example, if you change +// the global propagator, the DefaultClient might still be using the old one. +var DefaultClient = &http.Client{Transport: NewTransport(http.DefaultTransport)} + +// Get is a convenient replacement for http.Get that adds a span around the request. +func Get(ctx context.Context, targetURL string) (resp *http.Response, err error) { + req, err := http.NewRequestWithContext(ctx, "GET", targetURL, nil) + if err != nil { + return nil, err + } + return DefaultClient.Do(req) +} + +// Head is a convenient replacement for http.Head that adds a span around the request. +func Head(ctx context.Context, targetURL string) (resp *http.Response, err error) { + req, err := http.NewRequestWithContext(ctx, "HEAD", targetURL, nil) + if err != nil { + return nil, err + } + return DefaultClient.Do(req) +} + +// Post is a convenient replacement for http.Post that adds a span around the request. +func Post(ctx context.Context, targetURL, contentType string, body io.Reader) (resp *http.Response, err error) { + req, err := http.NewRequestWithContext(ctx, "POST", targetURL, body) + if err != nil { + return nil, err + } + req.Header.Set("Content-Type", contentType) + return DefaultClient.Do(req) +} + +// PostForm is a convenient replacement for http.PostForm that adds a span around the request. +func PostForm(ctx context.Context, targetURL string, data url.Values) (resp *http.Response, err error) { + return Post(ctx, targetURL, "application/x-www-form-urlencoded", strings.NewReader(data.Encode())) +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go new file mode 100644 index 0000000000..303e5505e4 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go @@ -0,0 +1,46 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "net/http" + + "go.opentelemetry.io/otel/attribute" + "go.opentelemetry.io/otel/trace" +) + +// Attribute keys that can be added to a span. +const ( + ReadBytesKey = attribute.Key("http.read_bytes") // if anything was read from the request body, the total number of bytes read + ReadErrorKey = attribute.Key("http.read_error") // If an error occurred while reading a request, the string of the error (io.EOF is not recorded) + WroteBytesKey = attribute.Key("http.wrote_bytes") // if anything was written to the response writer, the total number of bytes written + WriteErrorKey = attribute.Key("http.write_error") // if an error occurred while writing a reply, the string of the error (io.EOF is not recorded) +) + +// Server HTTP metrics. +const ( + RequestCount = "http.server.request_count" // Incoming request count total + RequestContentLength = "http.server.request_content_length" // Incoming request bytes total + ResponseContentLength = "http.server.response_content_length" // Incoming response bytes total + ServerLatency = "http.server.duration" // Incoming end to end duration, microseconds +) + +// Filter is a predicate used to determine whether a given http.request should +// be traced. A Filter must return true if the request should be traced. +type Filter func(*http.Request) bool + +func newTracer(tp trace.TracerProvider) trace.Tracer { + return tp.Tracer(instrumentationName, trace.WithInstrumentationVersion(Version())) +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go new file mode 100644 index 0000000000..e4fa1b8d9d --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go @@ -0,0 +1,208 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "context" + "net/http" + "net/http/httptrace" + + "go.opentelemetry.io/otel" + "go.opentelemetry.io/otel/metric" + "go.opentelemetry.io/otel/propagation" + "go.opentelemetry.io/otel/trace" +) + +const ( + instrumentationName = "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" +) + +// config represents the configuration options available for the http.Handler +// and http.Transport types. +type config struct { + ServerName string + Tracer trace.Tracer + Meter metric.Meter + Propagators propagation.TextMapPropagator + SpanStartOptions []trace.SpanStartOption + PublicEndpoint bool + PublicEndpointFn func(*http.Request) bool + ReadEvent bool + WriteEvent bool + Filters []Filter + SpanNameFormatter func(string, *http.Request) string + ClientTrace func(context.Context) *httptrace.ClientTrace + + TracerProvider trace.TracerProvider + MeterProvider metric.MeterProvider +} + +// Option interface used for setting optional config properties. +type Option interface { + apply(*config) +} + +type optionFunc func(*config) + +func (o optionFunc) apply(c *config) { + o(c) +} + +// newConfig creates a new config struct and applies opts to it. +func newConfig(opts ...Option) *config { + c := &config{ + Propagators: otel.GetTextMapPropagator(), + MeterProvider: otel.GetMeterProvider(), + } + for _, opt := range opts { + opt.apply(c) + } + + // Tracer is only initialized if manually specified. Otherwise, can be passed with the tracing context. + if c.TracerProvider != nil { + c.Tracer = newTracer(c.TracerProvider) + } + + c.Meter = c.MeterProvider.Meter( + instrumentationName, + metric.WithInstrumentationVersion(Version()), + ) + + return c +} + +// WithTracerProvider specifies a tracer provider to use for creating a tracer. +// If none is specified, the global provider is used. +func WithTracerProvider(provider trace.TracerProvider) Option { + return optionFunc(func(cfg *config) { + if provider != nil { + cfg.TracerProvider = provider + } + }) +} + +// WithMeterProvider specifies a meter provider to use for creating a meter. +// If none is specified, the global provider is used. +func WithMeterProvider(provider metric.MeterProvider) Option { + return optionFunc(func(cfg *config) { + if provider != nil { + cfg.MeterProvider = provider + } + }) +} + +// WithPublicEndpoint configures the Handler to link the span with an incoming +// span context. If this option is not provided, then the association is a child +// association instead of a link. +func WithPublicEndpoint() Option { + return optionFunc(func(c *config) { + c.PublicEndpoint = true + }) +} + +// WithPublicEndpointFn runs with every request, and allows conditionnally +// configuring the Handler to link the span with an incoming span context. If +// this option is not provided or returns false, then the association is a +// child association instead of a link. +// Note: WithPublicEndpoint takes precedence over WithPublicEndpointFn. +func WithPublicEndpointFn(fn func(*http.Request) bool) Option { + return optionFunc(func(c *config) { + c.PublicEndpointFn = fn + }) +} + +// WithPropagators configures specific propagators. If this +// option isn't specified, then the global TextMapPropagator is used. +func WithPropagators(ps propagation.TextMapPropagator) Option { + return optionFunc(func(c *config) { + if ps != nil { + c.Propagators = ps + } + }) +} + +// WithSpanOptions configures an additional set of +// trace.SpanOptions, which are applied to each new span. +func WithSpanOptions(opts ...trace.SpanStartOption) Option { + return optionFunc(func(c *config) { + c.SpanStartOptions = append(c.SpanStartOptions, opts...) + }) +} + +// WithFilter adds a filter to the list of filters used by the handler. +// If any filter indicates to exclude a request then the request will not be +// traced. All filters must allow a request to be traced for a Span to be created. +// If no filters are provided then all requests are traced. +// Filters will be invoked for each processed request, it is advised to make them +// simple and fast. +func WithFilter(f Filter) Option { + return optionFunc(func(c *config) { + c.Filters = append(c.Filters, f) + }) +} + +type event int + +// Different types of events that can be recorded, see WithMessageEvents. +const ( + ReadEvents event = iota + WriteEvents +) + +// WithMessageEvents configures the Handler to record the specified events +// (span.AddEvent) on spans. By default only summary attributes are added at the +// end of the request. +// +// Valid events are: +// - ReadEvents: Record the number of bytes read after every http.Request.Body.Read +// using the ReadBytesKey +// - WriteEvents: Record the number of bytes written after every http.ResponeWriter.Write +// using the WriteBytesKey +func WithMessageEvents(events ...event) Option { + return optionFunc(func(c *config) { + for _, e := range events { + switch e { + case ReadEvents: + c.ReadEvent = true + case WriteEvents: + c.WriteEvent = true + } + } + }) +} + +// WithSpanNameFormatter takes a function that will be called on every +// request and the returned string will become the Span Name. +func WithSpanNameFormatter(f func(operation string, r *http.Request) string) Option { + return optionFunc(func(c *config) { + c.SpanNameFormatter = f + }) +} + +// WithClientTrace takes a function that returns client trace instance that will be +// applied to the requests sent through the otelhttp Transport. +func WithClientTrace(f func(context.Context) *httptrace.ClientTrace) Option { + return optionFunc(func(c *config) { + c.ClientTrace = f + }) +} + +// WithServerName returns an Option that sets the name of the (virtual) server +// handling requests. +func WithServerName(server string) Option { + return optionFunc(func(c *config) { + c.ServerName = server + }) +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go new file mode 100644 index 0000000000..38c7f01c71 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go @@ -0,0 +1,18 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package otelhttp provides an http.Handler and functions that are intended +// to be used to add tracing by wrapping existing handlers (with Handler) and +// routes WithRouteTag. +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go new file mode 100644 index 0000000000..f103aa627d --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go @@ -0,0 +1,269 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "io" + "net/http" + "time" + + "github.com/felixge/httpsnoop" + + "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil" + "go.opentelemetry.io/otel" + "go.opentelemetry.io/otel/attribute" + "go.opentelemetry.io/otel/metric" + "go.opentelemetry.io/otel/propagation" + semconv "go.opentelemetry.io/otel/semconv/v1.17.0" + "go.opentelemetry.io/otel/trace" +) + +// middleware is an http middleware which wraps the next handler in a span. +type middleware struct { + operation string + server string + + tracer trace.Tracer + meter metric.Meter + propagators propagation.TextMapPropagator + spanStartOptions []trace.SpanStartOption + readEvent bool + writeEvent bool + filters []Filter + spanNameFormatter func(string, *http.Request) string + counters map[string]metric.Int64Counter + valueRecorders map[string]metric.Float64Histogram + publicEndpoint bool + publicEndpointFn func(*http.Request) bool +} + +func defaultHandlerFormatter(operation string, _ *http.Request) string { + return operation +} + +// NewHandler wraps the passed handler in a span named after the operation and +// enriches it with metrics. +func NewHandler(handler http.Handler, operation string, opts ...Option) http.Handler { + return NewMiddleware(operation, opts...)(handler) +} + +// NewMiddleware returns a tracing and metrics instrumentation middleware. +// The handler returned by the middleware wraps a handler +// in a span named after the operation and enriches it with metrics. +func NewMiddleware(operation string, opts ...Option) func(http.Handler) http.Handler { + h := middleware{ + operation: operation, + } + + defaultOpts := []Option{ + WithSpanOptions(trace.WithSpanKind(trace.SpanKindServer)), + WithSpanNameFormatter(defaultHandlerFormatter), + } + + c := newConfig(append(defaultOpts, opts...)...) + h.configure(c) + h.createMeasures() + + return func(next http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + h.serveHTTP(w, r, next) + }) + } +} + +func (h *middleware) configure(c *config) { + h.tracer = c.Tracer + h.meter = c.Meter + h.propagators = c.Propagators + h.spanStartOptions = c.SpanStartOptions + h.readEvent = c.ReadEvent + h.writeEvent = c.WriteEvent + h.filters = c.Filters + h.spanNameFormatter = c.SpanNameFormatter + h.publicEndpoint = c.PublicEndpoint + h.publicEndpointFn = c.PublicEndpointFn + h.server = c.ServerName +} + +func handleErr(err error) { + if err != nil { + otel.Handle(err) + } +} + +func (h *middleware) createMeasures() { + h.counters = make(map[string]metric.Int64Counter) + h.valueRecorders = make(map[string]metric.Float64Histogram) + + requestBytesCounter, err := h.meter.Int64Counter(RequestContentLength) + handleErr(err) + + responseBytesCounter, err := h.meter.Int64Counter(ResponseContentLength) + handleErr(err) + + serverLatencyMeasure, err := h.meter.Float64Histogram(ServerLatency) + handleErr(err) + + h.counters[RequestContentLength] = requestBytesCounter + h.counters[ResponseContentLength] = responseBytesCounter + h.valueRecorders[ServerLatency] = serverLatencyMeasure +} + +// serveHTTP sets up tracing and calls the given next http.Handler with the span +// context injected into the request context. +func (h *middleware) serveHTTP(w http.ResponseWriter, r *http.Request, next http.Handler) { + requestStartTime := time.Now() + for _, f := range h.filters { + if !f(r) { + // Simply pass through to the handler if a filter rejects the request + next.ServeHTTP(w, r) + return + } + } + + ctx := h.propagators.Extract(r.Context(), propagation.HeaderCarrier(r.Header)) + opts := []trace.SpanStartOption{ + trace.WithAttributes(semconvutil.HTTPServerRequest(h.server, r)...), + } + if h.server != "" { + hostAttr := semconv.NetHostName(h.server) + opts = append(opts, trace.WithAttributes(hostAttr)) + } + opts = append(opts, h.spanStartOptions...) + if h.publicEndpoint || (h.publicEndpointFn != nil && h.publicEndpointFn(r.WithContext(ctx))) { + opts = append(opts, trace.WithNewRoot()) + // Linking incoming span context if any for public endpoint. + if s := trace.SpanContextFromContext(ctx); s.IsValid() && s.IsRemote() { + opts = append(opts, trace.WithLinks(trace.Link{SpanContext: s})) + } + } + + tracer := h.tracer + + if tracer == nil { + if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() { + tracer = newTracer(span.TracerProvider()) + } else { + tracer = newTracer(otel.GetTracerProvider()) + } + } + + ctx, span := tracer.Start(ctx, h.spanNameFormatter(h.operation, r), opts...) + defer span.End() + + readRecordFunc := func(int64) {} + if h.readEvent { + readRecordFunc = func(n int64) { + span.AddEvent("read", trace.WithAttributes(ReadBytesKey.Int64(n))) + } + } + + var bw bodyWrapper + // if request body is nil or NoBody, we don't want to mutate the body as it + // will affect the identity of it in an unforeseeable way because we assert + // ReadCloser fulfills a certain interface and it is indeed nil or NoBody. + if r.Body != nil && r.Body != http.NoBody { + bw.ReadCloser = r.Body + bw.record = readRecordFunc + r.Body = &bw + } + + writeRecordFunc := func(int64) {} + if h.writeEvent { + writeRecordFunc = func(n int64) { + span.AddEvent("write", trace.WithAttributes(WroteBytesKey.Int64(n))) + } + } + + rww := &respWriterWrapper{ + ResponseWriter: w, + record: writeRecordFunc, + ctx: ctx, + props: h.propagators, + statusCode: http.StatusOK, // default status code in case the Handler doesn't write anything + } + + // Wrap w to use our ResponseWriter methods while also exposing + // other interfaces that w may implement (http.CloseNotifier, + // http.Flusher, http.Hijacker, http.Pusher, io.ReaderFrom). + + w = httpsnoop.Wrap(w, httpsnoop.Hooks{ + Header: func(httpsnoop.HeaderFunc) httpsnoop.HeaderFunc { + return rww.Header + }, + Write: func(httpsnoop.WriteFunc) httpsnoop.WriteFunc { + return rww.Write + }, + WriteHeader: func(httpsnoop.WriteHeaderFunc) httpsnoop.WriteHeaderFunc { + return rww.WriteHeader + }, + }) + + labeler := &Labeler{} + ctx = injectLabeler(ctx, labeler) + + next.ServeHTTP(w, r.WithContext(ctx)) + + setAfterServeAttributes(span, bw.read, rww.written, rww.statusCode, bw.err, rww.err) + + // Add metrics + attributes := append(labeler.Get(), semconvutil.HTTPServerRequest(h.server, r)...) + if rww.statusCode > 0 { + attributes = append(attributes, semconv.HTTPStatusCode(rww.statusCode)) + } + o := metric.WithAttributes(attributes...) + h.counters[RequestContentLength].Add(ctx, bw.read, o) + h.counters[ResponseContentLength].Add(ctx, rww.written, o) + + // Use floating point division here for higher precision (instead of Millisecond method). + elapsedTime := float64(time.Since(requestStartTime)) / float64(time.Millisecond) + + h.valueRecorders[ServerLatency].Record(ctx, elapsedTime, o) +} + +func setAfterServeAttributes(span trace.Span, read, wrote int64, statusCode int, rerr, werr error) { + attributes := []attribute.KeyValue{} + + // TODO: Consider adding an event after each read and write, possibly as an + // option (defaulting to off), so as to not create needlessly verbose spans. + if read > 0 { + attributes = append(attributes, ReadBytesKey.Int64(read)) + } + if rerr != nil && rerr != io.EOF { + attributes = append(attributes, ReadErrorKey.String(rerr.Error())) + } + if wrote > 0 { + attributes = append(attributes, WroteBytesKey.Int64(wrote)) + } + if statusCode > 0 { + attributes = append(attributes, semconv.HTTPStatusCode(statusCode)) + } + span.SetStatus(semconvutil.HTTPServerStatus(statusCode)) + + if werr != nil && werr != io.EOF { + attributes = append(attributes, WriteErrorKey.String(werr.Error())) + } + span.SetAttributes(attributes...) +} + +// WithRouteTag annotates a span with the provided route name using the +// RouteKey Tag. +func WithRouteTag(route string, h http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + span := trace.SpanFromContext(r.Context()) + span.SetAttributes(semconv.HTTPRoute(route)) + h.ServeHTTP(w, r) + }) +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/gen.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/gen.go new file mode 100644 index 0000000000..edf4ce3d31 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/gen.go @@ -0,0 +1,21 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil" + +// Generate semconvutil package: +//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/httpconv_test.go.tmpl "--data={}" --out=httpconv_test.go +//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/httpconv.go.tmpl "--data={}" --out=httpconv.go +//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/netconv_test.go.tmpl "--data={}" --out=netconv_test.go +//go:generate gotmpl --body=../../../../../../internal/shared/semconvutil/netconv.go.tmpl "--data={}" --out=netconv.go diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/httpconv.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/httpconv.go new file mode 100644 index 0000000000..9bab232e3d --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/httpconv.go @@ -0,0 +1,460 @@ +// Code created by gotmpl. DO NOT MODIFY. +// source: internal/shared/semconvutil/httpconv.go.tmpl + +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil" + +import ( + "fmt" + "net/http" + "strings" + + "go.opentelemetry.io/otel/attribute" + "go.opentelemetry.io/otel/codes" + semconv "go.opentelemetry.io/otel/semconv/v1.17.0" +) + +// HTTPClientResponse returns trace attributes for an HTTP response received by a +// client from a server. It will return the following attributes if the related +// values are defined in resp: "http.status.code", +// "http.response_content_length". +// +// This does not add all OpenTelemetry required attributes for an HTTP event, +// it assumes ClientRequest was used to create the span with a complete set of +// attributes. If a complete set of attributes can be generated using the +// request contained in resp. For example: +// +// append(HTTPClientResponse(resp), ClientRequest(resp.Request)...) +func HTTPClientResponse(resp *http.Response) []attribute.KeyValue { + return hc.ClientResponse(resp) +} + +// HTTPClientRequest returns trace attributes for an HTTP request made by a client. +// The following attributes are always returned: "http.url", "http.flavor", +// "http.method", "net.peer.name". The following attributes are returned if the +// related values are defined in req: "net.peer.port", "http.user_agent", +// "http.request_content_length", "enduser.id". +func HTTPClientRequest(req *http.Request) []attribute.KeyValue { + return hc.ClientRequest(req) +} + +// HTTPClientStatus returns a span status code and message for an HTTP status code +// value received by a client. +func HTTPClientStatus(code int) (codes.Code, string) { + return hc.ClientStatus(code) +} + +// HTTPServerRequest returns trace attributes for an HTTP request received by a +// server. +// +// The server must be the primary server name if it is known. For example this +// would be the ServerName directive +// (https://httpd.apache.org/docs/2.4/mod/core.html#servername) for an Apache +// server, and the server_name directive +// (http://nginx.org/en/docs/http/ngx_http_core_module.html#server_name) for an +// nginx server. More generically, the primary server name would be the host +// header value that matches the default virtual host of an HTTP server. It +// should include the host identifier and if a port is used to route to the +// server that port identifier should be included as an appropriate port +// suffix. +// +// If the primary server name is not known, server should be an empty string. +// The req Host will be used to determine the server instead. +// +// The following attributes are always returned: "http.method", "http.scheme", +// "http.flavor", "http.target", "net.host.name". The following attributes are +// returned if they related values are defined in req: "net.host.port", +// "net.sock.peer.addr", "net.sock.peer.port", "http.user_agent", "enduser.id", +// "http.client_ip". +func HTTPServerRequest(server string, req *http.Request) []attribute.KeyValue { + return hc.ServerRequest(server, req) +} + +// HTTPServerStatus returns a span status code and message for an HTTP status code +// value returned by a server. Status codes in the 400-499 range are not +// returned as errors. +func HTTPServerStatus(code int) (codes.Code, string) { + return hc.ServerStatus(code) +} + +// HTTPRequestHeader returns the contents of h as attributes. +// +// Instrumentation should require an explicit configuration of which headers to +// captured and then prune what they pass here. Including all headers can be a +// security risk - explicit configuration helps avoid leaking sensitive +// information. +// +// The User-Agent header is already captured in the http.user_agent attribute +// from ClientRequest and ServerRequest. Instrumentation may provide an option +// to capture that header here even though it is not recommended. Otherwise, +// instrumentation should filter that out of what is passed. +func HTTPRequestHeader(h http.Header) []attribute.KeyValue { + return hc.RequestHeader(h) +} + +// HTTPResponseHeader returns the contents of h as attributes. +// +// Instrumentation should require an explicit configuration of which headers to +// captured and then prune what they pass here. Including all headers can be a +// security risk - explicit configuration helps avoid leaking sensitive +// information. +// +// The User-Agent header is already captured in the http.user_agent attribute +// from ClientRequest and ServerRequest. Instrumentation may provide an option +// to capture that header here even though it is not recommended. Otherwise, +// instrumentation should filter that out of what is passed. +func HTTPResponseHeader(h http.Header) []attribute.KeyValue { + return hc.ResponseHeader(h) +} + +// httpConv are the HTTP semantic convention attributes defined for a version +// of the OpenTelemetry specification. +type httpConv struct { + NetConv *netConv + + EnduserIDKey attribute.Key + HTTPClientIPKey attribute.Key + HTTPFlavorKey attribute.Key + HTTPMethodKey attribute.Key + HTTPRequestContentLengthKey attribute.Key + HTTPResponseContentLengthKey attribute.Key + HTTPRouteKey attribute.Key + HTTPSchemeHTTP attribute.KeyValue + HTTPSchemeHTTPS attribute.KeyValue + HTTPStatusCodeKey attribute.Key + HTTPTargetKey attribute.Key + HTTPURLKey attribute.Key + HTTPUserAgentKey attribute.Key +} + +var hc = &httpConv{ + NetConv: nc, + + EnduserIDKey: semconv.EnduserIDKey, + HTTPClientIPKey: semconv.HTTPClientIPKey, + HTTPFlavorKey: semconv.HTTPFlavorKey, + HTTPMethodKey: semconv.HTTPMethodKey, + HTTPRequestContentLengthKey: semconv.HTTPRequestContentLengthKey, + HTTPResponseContentLengthKey: semconv.HTTPResponseContentLengthKey, + HTTPRouteKey: semconv.HTTPRouteKey, + HTTPSchemeHTTP: semconv.HTTPSchemeHTTP, + HTTPSchemeHTTPS: semconv.HTTPSchemeHTTPS, + HTTPStatusCodeKey: semconv.HTTPStatusCodeKey, + HTTPTargetKey: semconv.HTTPTargetKey, + HTTPURLKey: semconv.HTTPURLKey, + HTTPUserAgentKey: semconv.HTTPUserAgentKey, +} + +// ClientResponse returns attributes for an HTTP response received by a client +// from a server. The following attributes are returned if the related values +// are defined in resp: "http.status.code", "http.response_content_length". +// +// This does not add all OpenTelemetry required attributes for an HTTP event, +// it assumes ClientRequest was used to create the span with a complete set of +// attributes. If a complete set of attributes can be generated using the +// request contained in resp. For example: +// +// append(ClientResponse(resp), ClientRequest(resp.Request)...) +func (c *httpConv) ClientResponse(resp *http.Response) []attribute.KeyValue { + var n int + if resp.StatusCode > 0 { + n++ + } + if resp.ContentLength > 0 { + n++ + } + + attrs := make([]attribute.KeyValue, 0, n) + if resp.StatusCode > 0 { + attrs = append(attrs, c.HTTPStatusCodeKey.Int(resp.StatusCode)) + } + if resp.ContentLength > 0 { + attrs = append(attrs, c.HTTPResponseContentLengthKey.Int(int(resp.ContentLength))) + } + return attrs +} + +// ClientRequest returns attributes for an HTTP request made by a client. The +// following attributes are always returned: "http.url", "http.flavor", +// "http.method", "net.peer.name". The following attributes are returned if the +// related values are defined in req: "net.peer.port", "http.user_agent", +// "http.request_content_length", "enduser.id". +func (c *httpConv) ClientRequest(req *http.Request) []attribute.KeyValue { + n := 3 // URL, peer name, proto, and method. + var h string + if req.URL != nil { + h = req.URL.Host + } + peer, p := firstHostPort(h, req.Header.Get("Host")) + port := requiredHTTPPort(req.URL != nil && req.URL.Scheme == "https", p) + if port > 0 { + n++ + } + useragent := req.UserAgent() + if useragent != "" { + n++ + } + if req.ContentLength > 0 { + n++ + } + userID, _, hasUserID := req.BasicAuth() + if hasUserID { + n++ + } + attrs := make([]attribute.KeyValue, 0, n) + + attrs = append(attrs, c.method(req.Method)) + attrs = append(attrs, c.proto(req.Proto)) + + var u string + if req.URL != nil { + // Remove any username/password info that may be in the URL. + userinfo := req.URL.User + req.URL.User = nil + u = req.URL.String() + // Restore any username/password info that was removed. + req.URL.User = userinfo + } + attrs = append(attrs, c.HTTPURLKey.String(u)) + + attrs = append(attrs, c.NetConv.PeerName(peer)) + if port > 0 { + attrs = append(attrs, c.NetConv.PeerPort(port)) + } + + if useragent != "" { + attrs = append(attrs, c.HTTPUserAgentKey.String(useragent)) + } + + if l := req.ContentLength; l > 0 { + attrs = append(attrs, c.HTTPRequestContentLengthKey.Int64(l)) + } + + if hasUserID { + attrs = append(attrs, c.EnduserIDKey.String(userID)) + } + + return attrs +} + +// ServerRequest returns attributes for an HTTP request received by a server. +// +// The server must be the primary server name if it is known. For example this +// would be the ServerName directive +// (https://httpd.apache.org/docs/2.4/mod/core.html#servername) for an Apache +// server, and the server_name directive +// (http://nginx.org/en/docs/http/ngx_http_core_module.html#server_name) for an +// nginx server. More generically, the primary server name would be the host +// header value that matches the default virtual host of an HTTP server. It +// should include the host identifier and if a port is used to route to the +// server that port identifier should be included as an appropriate port +// suffix. +// +// If the primary server name is not known, server should be an empty string. +// The req Host will be used to determine the server instead. +// +// The following attributes are always returned: "http.method", "http.scheme", +// "http.flavor", "http.target", "net.host.name". The following attributes are +// returned if they related values are defined in req: "net.host.port", +// "net.sock.peer.addr", "net.sock.peer.port", "http.user_agent", "enduser.id", +// "http.client_ip". +func (c *httpConv) ServerRequest(server string, req *http.Request) []attribute.KeyValue { + // TODO: This currently does not add the specification required + // `http.target` attribute. It has too high of a cardinality to safely be + // added. An alternate should be added, or this comment removed, when it is + // addressed by the specification. If it is ultimately decided to continue + // not including the attribute, the HTTPTargetKey field of the httpConv + // should be removed as well. + + n := 4 // Method, scheme, proto, and host name. + var host string + var p int + if server == "" { + host, p = splitHostPort(req.Host) + } else { + // Prioritize the primary server name. + host, p = splitHostPort(server) + if p < 0 { + _, p = splitHostPort(req.Host) + } + } + hostPort := requiredHTTPPort(req.TLS != nil, p) + if hostPort > 0 { + n++ + } + peer, peerPort := splitHostPort(req.RemoteAddr) + if peer != "" { + n++ + if peerPort > 0 { + n++ + } + } + useragent := req.UserAgent() + if useragent != "" { + n++ + } + userID, _, hasUserID := req.BasicAuth() + if hasUserID { + n++ + } + clientIP := serverClientIP(req.Header.Get("X-Forwarded-For")) + if clientIP != "" { + n++ + } + attrs := make([]attribute.KeyValue, 0, n) + + attrs = append(attrs, c.method(req.Method)) + attrs = append(attrs, c.scheme(req.TLS != nil)) + attrs = append(attrs, c.proto(req.Proto)) + attrs = append(attrs, c.NetConv.HostName(host)) + + if hostPort > 0 { + attrs = append(attrs, c.NetConv.HostPort(hostPort)) + } + + if peer != "" { + // The Go HTTP server sets RemoteAddr to "IP:port", this will not be a + // file-path that would be interpreted with a sock family. + attrs = append(attrs, c.NetConv.SockPeerAddr(peer)) + if peerPort > 0 { + attrs = append(attrs, c.NetConv.SockPeerPort(peerPort)) + } + } + + if useragent != "" { + attrs = append(attrs, c.HTTPUserAgentKey.String(useragent)) + } + + if hasUserID { + attrs = append(attrs, c.EnduserIDKey.String(userID)) + } + + if clientIP != "" { + attrs = append(attrs, c.HTTPClientIPKey.String(clientIP)) + } + + return attrs +} + +func (c *httpConv) method(method string) attribute.KeyValue { + if method == "" { + return c.HTTPMethodKey.String(http.MethodGet) + } + return c.HTTPMethodKey.String(method) +} + +func (c *httpConv) scheme(https bool) attribute.KeyValue { // nolint:revive + if https { + return c.HTTPSchemeHTTPS + } + return c.HTTPSchemeHTTP +} + +func (c *httpConv) proto(proto string) attribute.KeyValue { + switch proto { + case "HTTP/1.0": + return c.HTTPFlavorKey.String("1.0") + case "HTTP/1.1": + return c.HTTPFlavorKey.String("1.1") + case "HTTP/2": + return c.HTTPFlavorKey.String("2.0") + case "HTTP/3": + return c.HTTPFlavorKey.String("3.0") + default: + return c.HTTPFlavorKey.String(proto) + } +} + +func serverClientIP(xForwardedFor string) string { + if idx := strings.Index(xForwardedFor, ","); idx >= 0 { + xForwardedFor = xForwardedFor[:idx] + } + return xForwardedFor +} + +func requiredHTTPPort(https bool, port int) int { // nolint:revive + if https { + if port > 0 && port != 443 { + return port + } + } else { + if port > 0 && port != 80 { + return port + } + } + return -1 +} + +// Return the request host and port from the first non-empty source. +func firstHostPort(source ...string) (host string, port int) { + for _, hostport := range source { + host, port = splitHostPort(hostport) + if host != "" || port > 0 { + break + } + } + return +} + +// RequestHeader returns the contents of h as OpenTelemetry attributes. +func (c *httpConv) RequestHeader(h http.Header) []attribute.KeyValue { + return c.header("http.request.header", h) +} + +// ResponseHeader returns the contents of h as OpenTelemetry attributes. +func (c *httpConv) ResponseHeader(h http.Header) []attribute.KeyValue { + return c.header("http.response.header", h) +} + +func (c *httpConv) header(prefix string, h http.Header) []attribute.KeyValue { + key := func(k string) attribute.Key { + k = strings.ToLower(k) + k = strings.ReplaceAll(k, "-", "_") + k = fmt.Sprintf("%s.%s", prefix, k) + return attribute.Key(k) + } + + attrs := make([]attribute.KeyValue, 0, len(h)) + for k, v := range h { + attrs = append(attrs, key(k).StringSlice(v)) + } + return attrs +} + +// ClientStatus returns a span status code and message for an HTTP status code +// value received by a client. +func (c *httpConv) ClientStatus(code int) (codes.Code, string) { + if code < 100 || code >= 600 { + return codes.Error, fmt.Sprintf("Invalid HTTP status code %d", code) + } + if code >= 400 { + return codes.Error, "" + } + return codes.Unset, "" +} + +// ServerStatus returns a span status code and message for an HTTP status code +// value returned by a server. Status codes in the 400-499 range are not +// returned as errors. +func (c *httpConv) ServerStatus(code int) (codes.Code, string) { + if code < 100 || code >= 600 { + return codes.Error, fmt.Sprintf("Invalid HTTP status code %d", code) + } + if code >= 500 { + return codes.Error, "" + } + return codes.Unset, "" +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/netconv.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/netconv.go new file mode 100644 index 0000000000..bde8893437 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil/netconv.go @@ -0,0 +1,368 @@ +// Code created by gotmpl. DO NOT MODIFY. +// source: internal/shared/semconvutil/netconv.go.tmpl + +// Copyright The OpenTelemetry Authors +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package semconvutil // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil" + +import ( + "net" + "strconv" + "strings" + + "go.opentelemetry.io/otel/attribute" + semconv "go.opentelemetry.io/otel/semconv/v1.17.0" +) + +// NetTransport returns a trace attribute describing the transport protocol of the +// passed network. See the net.Dial for information about acceptable network +// values. +func NetTransport(network string) attribute.KeyValue { + return nc.Transport(network) +} + +// NetClient returns trace attributes for a client network connection to address. +// See net.Dial for information about acceptable address values, address should +// be the same as the one used to create conn. If conn is nil, only network +// peer attributes will be returned that describe address. Otherwise, the +// socket level information about conn will also be included. +func NetClient(address string, conn net.Conn) []attribute.KeyValue { + return nc.Client(address, conn) +} + +// NetServer returns trace attributes for a network listener listening at address. +// See net.Listen for information about acceptable address values, address +// should be the same as the one used to create ln. If ln is nil, only network +// host attributes will be returned that describe address. Otherwise, the +// socket level information about ln will also be included. +func NetServer(address string, ln net.Listener) []attribute.KeyValue { + return nc.Server(address, ln) +} + +// netConv are the network semantic convention attributes defined for a version +// of the OpenTelemetry specification. +type netConv struct { + NetHostNameKey attribute.Key + NetHostPortKey attribute.Key + NetPeerNameKey attribute.Key + NetPeerPortKey attribute.Key + NetSockFamilyKey attribute.Key + NetSockPeerAddrKey attribute.Key + NetSockPeerPortKey attribute.Key + NetSockHostAddrKey attribute.Key + NetSockHostPortKey attribute.Key + NetTransportOther attribute.KeyValue + NetTransportTCP attribute.KeyValue + NetTransportUDP attribute.KeyValue + NetTransportInProc attribute.KeyValue +} + +var nc = &netConv{ + NetHostNameKey: semconv.NetHostNameKey, + NetHostPortKey: semconv.NetHostPortKey, + NetPeerNameKey: semconv.NetPeerNameKey, + NetPeerPortKey: semconv.NetPeerPortKey, + NetSockFamilyKey: semconv.NetSockFamilyKey, + NetSockPeerAddrKey: semconv.NetSockPeerAddrKey, + NetSockPeerPortKey: semconv.NetSockPeerPortKey, + NetSockHostAddrKey: semconv.NetSockHostAddrKey, + NetSockHostPortKey: semconv.NetSockHostPortKey, + NetTransportOther: semconv.NetTransportOther, + NetTransportTCP: semconv.NetTransportTCP, + NetTransportUDP: semconv.NetTransportUDP, + NetTransportInProc: semconv.NetTransportInProc, +} + +func (c *netConv) Transport(network string) attribute.KeyValue { + switch network { + case "tcp", "tcp4", "tcp6": + return c.NetTransportTCP + case "udp", "udp4", "udp6": + return c.NetTransportUDP + case "unix", "unixgram", "unixpacket": + return c.NetTransportInProc + default: + // "ip:*", "ip4:*", and "ip6:*" all are considered other. + return c.NetTransportOther + } +} + +// Host returns attributes for a network host address. +func (c *netConv) Host(address string) []attribute.KeyValue { + h, p := splitHostPort(address) + var n int + if h != "" { + n++ + if p > 0 { + n++ + } + } + + if n == 0 { + return nil + } + + attrs := make([]attribute.KeyValue, 0, n) + attrs = append(attrs, c.HostName(h)) + if p > 0 { + attrs = append(attrs, c.HostPort(int(p))) + } + return attrs +} + +// Server returns attributes for a network listener listening at address. See +// net.Listen for information about acceptable address values, address should +// be the same as the one used to create ln. If ln is nil, only network host +// attributes will be returned that describe address. Otherwise, the socket +// level information about ln will also be included. +func (c *netConv) Server(address string, ln net.Listener) []attribute.KeyValue { + if ln == nil { + return c.Host(address) + } + + lAddr := ln.Addr() + if lAddr == nil { + return c.Host(address) + } + + hostName, hostPort := splitHostPort(address) + sockHostAddr, sockHostPort := splitHostPort(lAddr.String()) + network := lAddr.Network() + sockFamily := family(network, sockHostAddr) + + n := nonZeroStr(hostName, network, sockHostAddr, sockFamily) + n += positiveInt(hostPort, sockHostPort) + attr := make([]attribute.KeyValue, 0, n) + if hostName != "" { + attr = append(attr, c.HostName(hostName)) + if hostPort > 0 { + // Only if net.host.name is set should net.host.port be. + attr = append(attr, c.HostPort(hostPort)) + } + } + if network != "" { + attr = append(attr, c.Transport(network)) + } + if sockFamily != "" { + attr = append(attr, c.NetSockFamilyKey.String(sockFamily)) + } + if sockHostAddr != "" { + attr = append(attr, c.NetSockHostAddrKey.String(sockHostAddr)) + if sockHostPort > 0 { + // Only if net.sock.host.addr is set should net.sock.host.port be. + attr = append(attr, c.NetSockHostPortKey.Int(sockHostPort)) + } + } + return attr +} + +func (c *netConv) HostName(name string) attribute.KeyValue { + return c.NetHostNameKey.String(name) +} + +func (c *netConv) HostPort(port int) attribute.KeyValue { + return c.NetHostPortKey.Int(port) +} + +// Client returns attributes for a client network connection to address. See +// net.Dial for information about acceptable address values, address should be +// the same as the one used to create conn. If conn is nil, only network peer +// attributes will be returned that describe address. Otherwise, the socket +// level information about conn will also be included. +func (c *netConv) Client(address string, conn net.Conn) []attribute.KeyValue { + if conn == nil { + return c.Peer(address) + } + + lAddr, rAddr := conn.LocalAddr(), conn.RemoteAddr() + + var network string + switch { + case lAddr != nil: + network = lAddr.Network() + case rAddr != nil: + network = rAddr.Network() + default: + return c.Peer(address) + } + + peerName, peerPort := splitHostPort(address) + var ( + sockFamily string + sockPeerAddr string + sockPeerPort int + sockHostAddr string + sockHostPort int + ) + + if lAddr != nil { + sockHostAddr, sockHostPort = splitHostPort(lAddr.String()) + } + + if rAddr != nil { + sockPeerAddr, sockPeerPort = splitHostPort(rAddr.String()) + } + + switch { + case sockHostAddr != "": + sockFamily = family(network, sockHostAddr) + case sockPeerAddr != "": + sockFamily = family(network, sockPeerAddr) + } + + n := nonZeroStr(peerName, network, sockPeerAddr, sockHostAddr, sockFamily) + n += positiveInt(peerPort, sockPeerPort, sockHostPort) + attr := make([]attribute.KeyValue, 0, n) + if peerName != "" { + attr = append(attr, c.PeerName(peerName)) + if peerPort > 0 { + // Only if net.peer.name is set should net.peer.port be. + attr = append(attr, c.PeerPort(peerPort)) + } + } + if network != "" { + attr = append(attr, c.Transport(network)) + } + if sockFamily != "" { + attr = append(attr, c.NetSockFamilyKey.String(sockFamily)) + } + if sockPeerAddr != "" { + attr = append(attr, c.NetSockPeerAddrKey.String(sockPeerAddr)) + if sockPeerPort > 0 { + // Only if net.sock.peer.addr is set should net.sock.peer.port be. + attr = append(attr, c.NetSockPeerPortKey.Int(sockPeerPort)) + } + } + if sockHostAddr != "" { + attr = append(attr, c.NetSockHostAddrKey.String(sockHostAddr)) + if sockHostPort > 0 { + // Only if net.sock.host.addr is set should net.sock.host.port be. + attr = append(attr, c.NetSockHostPortKey.Int(sockHostPort)) + } + } + return attr +} + +func family(network, address string) string { + switch network { + case "unix", "unixgram", "unixpacket": + return "unix" + default: + if ip := net.ParseIP(address); ip != nil { + if ip.To4() == nil { + return "inet6" + } + return "inet" + } + } + return "" +} + +func nonZeroStr(strs ...string) int { + var n int + for _, str := range strs { + if str != "" { + n++ + } + } + return n +} + +func positiveInt(ints ...int) int { + var n int + for _, i := range ints { + if i > 0 { + n++ + } + } + return n +} + +// Peer returns attributes for a network peer address. +func (c *netConv) Peer(address string) []attribute.KeyValue { + h, p := splitHostPort(address) + var n int + if h != "" { + n++ + if p > 0 { + n++ + } + } + + if n == 0 { + return nil + } + + attrs := make([]attribute.KeyValue, 0, n) + attrs = append(attrs, c.PeerName(h)) + if p > 0 { + attrs = append(attrs, c.PeerPort(int(p))) + } + return attrs +} + +func (c *netConv) PeerName(name string) attribute.KeyValue { + return c.NetPeerNameKey.String(name) +} + +func (c *netConv) PeerPort(port int) attribute.KeyValue { + return c.NetPeerPortKey.Int(port) +} + +func (c *netConv) SockPeerAddr(addr string) attribute.KeyValue { + return c.NetSockPeerAddrKey.String(addr) +} + +func (c *netConv) SockPeerPort(port int) attribute.KeyValue { + return c.NetSockPeerPortKey.Int(port) +} + +// splitHostPort splits a network address hostport of the form "host", +// "host%zone", "[host]", "[host%zone], "host:port", "host%zone:port", +// "[host]:port", "[host%zone]:port", or ":port" into host or host%zone and +// port. +// +// An empty host is returned if it is not provided or unparsable. A negative +// port is returned if it is not provided or unparsable. +func splitHostPort(hostport string) (host string, port int) { + port = -1 + + if strings.HasPrefix(hostport, "[") { + addrEnd := strings.LastIndex(hostport, "]") + if addrEnd < 0 { + // Invalid hostport. + return + } + if i := strings.LastIndex(hostport[addrEnd:], ":"); i < 0 { + host = hostport[1:addrEnd] + return + } + } else { + if i := strings.LastIndex(hostport, ":"); i < 0 { + host = hostport + return + } + } + + host, pStr, err := net.SplitHostPort(hostport) + if err != nil { + return + } + + p, err := strconv.ParseUint(pStr, 10, 16) + if err != nil { + return + } + return host, int(p) +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go new file mode 100644 index 0000000000..26a51a1805 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go @@ -0,0 +1,65 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "context" + "sync" + + "go.opentelemetry.io/otel/attribute" +) + +// Labeler is used to allow instrumented HTTP handlers to add custom attributes to +// the metrics recorded by the net/http instrumentation. +type Labeler struct { + mu sync.Mutex + attributes []attribute.KeyValue +} + +// Add attributes to a Labeler. +func (l *Labeler) Add(ls ...attribute.KeyValue) { + l.mu.Lock() + defer l.mu.Unlock() + l.attributes = append(l.attributes, ls...) +} + +// Get returns a copy of the attributes added to the Labeler. +func (l *Labeler) Get() []attribute.KeyValue { + l.mu.Lock() + defer l.mu.Unlock() + ret := make([]attribute.KeyValue, len(l.attributes)) + copy(ret, l.attributes) + return ret +} + +type labelerContextKeyType int + +const lablelerContextKey labelerContextKeyType = 0 + +func injectLabeler(ctx context.Context, l *Labeler) context.Context { + return context.WithValue(ctx, lablelerContextKey, l) +} + +// LabelerFromContext retrieves a Labeler instance from the provided context if +// one is available. If no Labeler was found in the provided context a new, empty +// Labeler is returned and the second return value is false. In this case it is +// safe to use the Labeler but any attributes added to it will not be used. +func LabelerFromContext(ctx context.Context) (*Labeler, bool) { + l, ok := ctx.Value(lablelerContextKey).(*Labeler) + if !ok { + l = &Labeler{} + } + return l, ok +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go new file mode 100644 index 0000000000..24c8cb264c --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go @@ -0,0 +1,193 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "context" + "io" + "net/http" + "net/http/httptrace" + + "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil" + "go.opentelemetry.io/otel" + "go.opentelemetry.io/otel/codes" + "go.opentelemetry.io/otel/propagation" + "go.opentelemetry.io/otel/trace" +) + +// Transport implements the http.RoundTripper interface and wraps +// outbound HTTP(S) requests with a span. +type Transport struct { + rt http.RoundTripper + + tracer trace.Tracer + propagators propagation.TextMapPropagator + spanStartOptions []trace.SpanStartOption + filters []Filter + spanNameFormatter func(string, *http.Request) string + clientTrace func(context.Context) *httptrace.ClientTrace +} + +var _ http.RoundTripper = &Transport{} + +// NewTransport wraps the provided http.RoundTripper with one that +// starts a span and injects the span context into the outbound request headers. +// +// If the provided http.RoundTripper is nil, http.DefaultTransport will be used +// as the base http.RoundTripper. +func NewTransport(base http.RoundTripper, opts ...Option) *Transport { + if base == nil { + base = http.DefaultTransport + } + + t := Transport{ + rt: base, + } + + defaultOpts := []Option{ + WithSpanOptions(trace.WithSpanKind(trace.SpanKindClient)), + WithSpanNameFormatter(defaultTransportFormatter), + } + + c := newConfig(append(defaultOpts, opts...)...) + t.applyConfig(c) + + return &t +} + +func (t *Transport) applyConfig(c *config) { + t.tracer = c.Tracer + t.propagators = c.Propagators + t.spanStartOptions = c.SpanStartOptions + t.filters = c.Filters + t.spanNameFormatter = c.SpanNameFormatter + t.clientTrace = c.ClientTrace +} + +func defaultTransportFormatter(_ string, r *http.Request) string { + return "HTTP " + r.Method +} + +// RoundTrip creates a Span and propagates its context via the provided request's headers +// before handing the request to the configured base RoundTripper. The created span will +// end when the response body is closed or when a read from the body returns io.EOF. +func (t *Transport) RoundTrip(r *http.Request) (*http.Response, error) { + for _, f := range t.filters { + if !f(r) { + // Simply pass through to the base RoundTripper if a filter rejects the request + return t.rt.RoundTrip(r) + } + } + + tracer := t.tracer + + if tracer == nil { + if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() { + tracer = newTracer(span.TracerProvider()) + } else { + tracer = newTracer(otel.GetTracerProvider()) + } + } + + opts := append([]trace.SpanStartOption{}, t.spanStartOptions...) // start with the configured options + + ctx, span := tracer.Start(r.Context(), t.spanNameFormatter("", r), opts...) + + if t.clientTrace != nil { + ctx = httptrace.WithClientTrace(ctx, t.clientTrace(ctx)) + } + + r = r.WithContext(ctx) + span.SetAttributes(semconvutil.HTTPClientRequest(r)...) + t.propagators.Inject(ctx, propagation.HeaderCarrier(r.Header)) + + res, err := t.rt.RoundTrip(r) + if err != nil { + span.RecordError(err) + span.SetStatus(codes.Error, err.Error()) + span.End() + return res, err + } + + span.SetAttributes(semconvutil.HTTPClientResponse(res)...) + span.SetStatus(semconvutil.HTTPClientStatus(res.StatusCode)) + res.Body = newWrappedBody(span, res.Body) + + return res, err +} + +// newWrappedBody returns a new and appropriately scoped *wrappedBody as an +// io.ReadCloser. If the passed body implements io.Writer, the returned value +// will implement io.ReadWriteCloser. +func newWrappedBody(span trace.Span, body io.ReadCloser) io.ReadCloser { + // The successful protocol switch responses will have a body that + // implement an io.ReadWriteCloser. Ensure this interface type continues + // to be satisfied if that is the case. + if _, ok := body.(io.ReadWriteCloser); ok { + return &wrappedBody{span: span, body: body} + } + + // Remove the implementation of the io.ReadWriteCloser and only implement + // the io.ReadCloser. + return struct{ io.ReadCloser }{&wrappedBody{span: span, body: body}} +} + +// wrappedBody is the response body type returned by the transport +// instrumentation to complete a span. Errors encountered when using the +// response body are recorded in span tracking the response. +// +// The span tracking the response is ended when this body is closed. +// +// If the response body implements the io.Writer interface (i.e. for +// successful protocol switches), the wrapped body also will. +type wrappedBody struct { + span trace.Span + body io.ReadCloser +} + +var _ io.ReadWriteCloser = &wrappedBody{} + +func (wb *wrappedBody) Write(p []byte) (int, error) { + // This will not panic given the guard in newWrappedBody. + n, err := wb.body.(io.Writer).Write(p) + if err != nil { + wb.span.RecordError(err) + wb.span.SetStatus(codes.Error, err.Error()) + } + return n, err +} + +func (wb *wrappedBody) Read(b []byte) (int, error) { + n, err := wb.body.Read(b) + + switch err { + case nil: + // nothing to do here but fall through to the return + case io.EOF: + wb.span.End() + default: + wb.span.RecordError(err) + wb.span.SetStatus(codes.Error, err.Error()) + } + return n, err +} + +func (wb *wrappedBody) Close() error { + wb.span.End() + if wb.body != nil { + return wb.body.Close() + } + return nil +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/version.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/version.go new file mode 100644 index 0000000000..bbcbb74160 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/version.go @@ -0,0 +1,28 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +// Version is the current release version of the otelhttp instrumentation. +func Version() string { + return "0.42.0" + // This string is updated by the pre_release.sh script during release +} + +// SemVersion is the semantic version to be supplied to tracer/meter creation. +// +// Deprecated: Use [Version] instead. +func SemVersion() string { + return Version() +} diff --git a/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go new file mode 100644 index 0000000000..11a35ed167 --- /dev/null +++ b/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go @@ -0,0 +1,99 @@ +// Copyright The OpenTelemetry Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp" + +import ( + "context" + "io" + "net/http" + + "go.opentelemetry.io/otel/propagation" +) + +var _ io.ReadCloser = &bodyWrapper{} + +// bodyWrapper wraps a http.Request.Body (an io.ReadCloser) to track the number +// of bytes read and the last error. +type bodyWrapper struct { + io.ReadCloser + record func(n int64) // must not be nil + + read int64 + err error +} + +func (w *bodyWrapper) Read(b []byte) (int, error) { + n, err := w.ReadCloser.Read(b) + n1 := int64(n) + w.read += n1 + w.err = err + w.record(n1) + return n, err +} + +func (w *bodyWrapper) Close() error { + return w.ReadCloser.Close() +} + +var _ http.ResponseWriter = &respWriterWrapper{} + +// respWriterWrapper wraps a http.ResponseWriter in order to track the number of +// bytes written, the last error, and to catch the first written statusCode. +// TODO: The wrapped http.ResponseWriter doesn't implement any of the optional +// types (http.Hijacker, http.Pusher, http.CloseNotifier, http.Flusher, etc) +// that may be useful when using it in real life situations. +type respWriterWrapper struct { + http.ResponseWriter + record func(n int64) // must not be nil + + // used to inject the header + ctx context.Context + + props propagation.TextMapPropagator + + written int64 + statusCode int + err error + wroteHeader bool +} + +func (w *respWriterWrapper) Header() http.Header { + return w.ResponseWriter.Header() +} + +func (w *respWriterWrapper) Write(p []byte) (int, error) { + if !w.wroteHeader { + w.WriteHeader(http.StatusOK) + } + n, err := w.ResponseWriter.Write(p) + n1 := int64(n) + w.record(n1) + w.written += n1 + w.err = err + return n, err +} + +// WriteHeader persists initial statusCode for span attribution. +// All calls to WriteHeader will be propagated to the underlying ResponseWriter +// and will persist the statusCode from the first call. +// Blocking consecutive calls to WriteHeader alters expected behavior and will +// remove warning logs from net/http where developers will notice incorrect handler implementations. +func (w *respWriterWrapper) WriteHeader(statusCode int) { + if !w.wroteHeader { + w.wroteHeader = true + w.statusCode = statusCode + } + w.ResponseWriter.WriteHeader(statusCode) +} diff --git a/vendor/modules.txt b/vendor/modules.txt index 19438ac007..706faf34c8 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -1618,7 +1618,7 @@ github.com/spf13/pflag # github.com/stretchr/objx v0.5.0 ## explicit; go 1.12 github.com/stretchr/objx -# github.com/stretchr/testify v1.8.3 +# github.com/stretchr/testify v1.8.4 ## explicit; go 1.20 github.com/stretchr/testify/assert github.com/stretchr/testify/mock @@ -1795,6 +1795,10 @@ go.opencensus.io/trace/tracestate ## explicit; go 1.18 go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/internal +# go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.1-0.20230608065455-5cc3715df180 +## explicit; go 1.19 +go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp +go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/internal/semconvutil # go.opentelemetry.io/contrib/zpages v0.42.0 ## explicit; go 1.19 go.opentelemetry.io/contrib/zpages