Complete Caddy module registration preparation

Co-authored-by: fabriziosalmi <1569108+fabriziosalmi@users.noreply.github.com>

CADDY_MODULE_REGISTRATION.md

@@ -0,0 +1,120 @@
+# Caddy Module Registration Checklist
+
+This document outlines the requirements and steps for successfully registering the caddy-waf module in the official Caddy modules directory.
+
+## ✅ Completed Requirements
+
+### 1. Module Structure Compliance
+- [x] **Module Interface Implementation**: Properly implements `caddy.Module` interface
+- [x] **Module ID**: Correctly uses `http.handlers.waf` as module ID
+- [x] **Registration**: Module is registered in `init()` function using `caddy.RegisterModule()`
+- [x] **Interface Guards**: Proper interface guards implemented for compile-time checking
+- [x] **Caddyfile Support**: Implements `caddyfile.Unmarshaler` for Caddyfile parsing
+
+### 2. Required Interfaces
+- [x] **caddy.Module**: Implemented via `CaddyModule()` method
+- [x] **caddy.Provisioner**: Implemented via `Provision()` method
+- [x] **caddy.Validator**: Implemented via `Validate()` method
+- [x] **caddyhttp.MiddlewareHandler**: Implemented via `ServeHTTP()` method
+- [x] **caddyfile.Unmarshaler**: Implemented via `UnmarshalCaddyfile()` method
+
+### 3. Documentation Requirements
+- [x] **Package Documentation**: Added comprehensive package-level documentation
+- [x] **Struct Documentation**: Added detailed documentation for main Middleware struct
+- [x] **README.md**: Comprehensive README with examples and installation instructions
+- [x] **Module Metadata**: Created `MODULE.md` with standardized module information
+- [x] **Usage Examples**: Created `caddyfile.example` with practical configuration examples
+- [x] **API Documentation**: Generated via `go doc` commands
+
+### 4. Code Quality and Standards
+- [x] **Go Module Structure**: Proper `go.mod` with correct module path
+- [x] **Version Consistency**: Updated version constant to match latest release (v0.0.6)
+- [x] **Build Verification**: Module builds successfully with `go build`
+- [x] **Module Verification**: Passes `go mod verify`
+- [x] **No Build Errors**: Clean compilation with no warnings or errors
+
+### 5. Release Management
+- [x] **Git Tags**: Proper semantic versioning tags (v0.0.3, v0.0.4, v0.0.5, v0.0.6)
+- [x] **GitHub Releases**: Automated release workflow creating GitHub releases
+- [x] **Release Notes**: Proper release descriptions and changelogs
+- [x] **Binary Assets**: Cross-platform binaries generated for releases
+
+### 6. Testing and Validation
+- [x] **Test Suite**: Comprehensive test coverage across multiple files
+- [x] **CI/CD Pipeline**: GitHub Actions workflows for testing and building
+- [x] **Module Import**: Can be imported and used with `xcaddy build`
+
+## 🔍 Potential Issues and Solutions
+
+### Issue Analysis: Registration Error ID `2b782e50-057d-4dac-bbd5-4cd1c1188669`
+
+Based on the error ID mentioned in the issue comments, this appears to be a server-side error during the registration process rather than a module compliance issue. Common causes and solutions:
+
+### 1. **Server-Side Registration Issues**
+- **Cause**: Temporary issues with the Caddy module registration service
+- **Solution**: Retry registration after some time
+- **Status**: May resolve automatically
+
+### 2. **Module Path Validation**
+- **Cause**: Registration service may have strict validation rules
+- **Solution**: Ensure `github.com/fabriziosalmi/caddy-waf` is accessible and properly formatted
+- **Status**: ✅ Module path is valid and accessible
+
+### 3. **Go Module Accessibility**
+- **Cause**: Registration service needs to fetch and validate the module
+- **Solution**: Ensure module is publicly accessible and properly tagged
+- **Status**: ✅ Repository is public with proper tags
+
+### 4. **Caddy Version Compatibility**
+- **Cause**: Module might require specific Caddy version
+- **Solution**: Verify compatibility with latest Caddy version
+- **Status**: ✅ Uses Caddy v2.9.1 (latest)
+
+## 🚀 Next Steps for Registration
+
+### 1. **Retry Registration**
+- Visit https://caddyserver.com/account/register-package
+- Use the exact module path: `github.com/fabriziosalmi/caddy-waf`
+- Ensure using the latest tag: `v0.0.6`
+
+### 2. **Contact Caddy Team**
+- If registration continues to fail, contact Caddy maintainers
+- Provide the error ID: `2b782e50-057d-4dac-bbd5-4cd1c1188669`
+- Reference this module's compliance with all requirements
+
+### 3. **Alternative Registration Paths**
+- Consider submitting a PR to the Caddy Community repository
+- Engage with the Caddy community on forums or Discord
+- Document the module in community wikis or resources
+
+## 📋 Final Verification Commands
+
+Run these commands to verify module readiness:
+
+```bash
+# Verify module builds successfully
+go build -v
+
+# Verify module interfaces
+go doc -short
+
+# Test module import
+go list -m github.com/fabriziosalmi/caddy-waf
+
+# Verify with xcaddy (if available)
+xcaddy build --with github.com/fabriziosalmi/caddy-waf
+
+# Check latest version/tag
+git describe --tags --abbrev=0
+```
+
+## 📞 Support Information
+
+- **Repository**: https://github.com/fabriziosalmi/caddy-waf
+- **Issues**: https://github.com/fabriziosalmi/caddy-waf/issues
+- **License**: AGPLv3
+- **Maintainer**: @fabriziosalmi
+
+---
+
+**Conclusion**: The caddy-waf module meets all technical requirements for Caddy module registration. The registration error appears to be a service-side issue that may resolve with retry attempts or by contacting the Caddy team directly.

MODULE.md

@@ -0,0 +1,76 @@
+# Caddy WAF Module Information
+
+**Module Name:** caddy-waf  
+**Module ID:** `http.handlers.waf`  
+**Go Module Path:** `github.com/fabriziosalmi/caddy-waf`  
+**License:** AGPLv3  
+**Latest Version:** v0.0.6  
+
+## Description
+
+A robust, highly customizable, and feature-rich Web Application Firewall (WAF) middleware for the Caddy web server. This middleware provides advanced protection against a comprehensive range of web-based threats, seamlessly integrating with Caddy and offering flexible configuration options to secure your applications effectively.
+
+## Module Type
+
+HTTP Handler Middleware (`http.handlers.waf`)
+
+## Features
+
+- **Regex-Based Filtering:** Deep URL, data & header inspection using powerful regex rules
+- **Blacklisting:** Blocks malicious IPs, domains & optionally TOR exit nodes
+- **Geo-Blocking:** Restricts access by country using GeoIP
+- **Rate Limiting:** Prevents abuse via customizable IP request limits
+- **Anomaly Scoring:** Dynamically blocks requests based on cumulative rule matches
+- **Multi-Phase Inspection:** Analyzes traffic throughout the request lifecycle
+- **Sensitive Data Redaction:** Removes private info from logs
+- **Custom Response Handling:** Tailored responses for blocked requests
+- **Detailed Monitoring:** JSON endpoint for performance tracking & analysis
+- **Dynamic Config Reloads:** Seamless updates without restarts
+
+## Installation
+
+```bash
+xcaddy build --with github.com/fabriziosalmi/caddy-waf
+```
+
+## Basic Usage
+
+```caddyfile
+example.com {
+    waf {
+        rule_file rules.json
+        ip_blacklist_file ip_blacklist.txt
+        dns_blacklist_file dns_blacklist.txt
+        metrics_endpoint /waf_metrics
+    }
+    
+    respond "Protected by Caddy WAF"
+}
+```
+
+## Configuration Options
+
+| Option | Type | Description |
+|--------|------|-------------|
+| `rule_file` | string | Path to WAF rules JSON file |
+| `ip_blacklist_file` | string | Path to IP blacklist file |
+| `dns_blacklist_file` | string | Path to DNS blacklist file |
+| `metrics_endpoint` | string | Endpoint for WAF metrics |
+| `anomaly_threshold` | int | Threshold for anomaly detection |
+| `rate_limit` | block | Rate limiting configuration |
+| `country_block` | block | Country blocking configuration |
+| `custom_response` | block | Custom response configuration |
+| `log_level` | string | Logging level (debug, info, warn, error) |
+| `log_file` | string | Path to log file |
+
+## Documentation
+
+Complete documentation is available in the [docs directory](https://github.com/fabriziosalmi/caddy-waf/tree/main/docs).
+
+## Repository
+
+https://github.com/fabriziosalmi/caddy-waf
+
+## Support
+
+For issues and support, please visit the [GitHub Issues page](https://github.com/fabriziosalmi/caddy-waf/issues).

caddyfile.example

@@ -0,0 +1,75 @@
+# Example Caddyfile showing caddy-waf module usage
+# This is a basic configuration example for the Caddy WAF middleware
+
+{
+    auto_https off
+    admin localhost:2019
+}
+
+# Example 1: Basic WAF setup
+example.com {
+    # Enable WAF protection with basic configuration
+    waf {
+        # Rule file for WAF rules
+        rule_file rules.json
+        
+        # IP blacklist file
+        ip_blacklist_file ip_blacklist.txt
+        
+        # DNS blacklist file  
+        dns_blacklist_file dns_blacklist.txt
+        
+        # Metrics endpoint
+        metrics_endpoint /waf_metrics
+        
+        # Anomaly threshold
+        anomaly_threshold 10
+        
+        # Log settings
+        log_level info
+        log_file waf.log
+    }
+    
+    # Your web application
+    respond "Hello, World! Protected by Caddy WAF"
+}
+
+# Example 2: Advanced WAF configuration with rate limiting
+api.example.com {
+    waf {
+        rule_file rules.json
+        ip_blacklist_file ip_blacklist.txt
+        dns_blacklist_file dns_blacklist.txt
+        metrics_endpoint /waf_metrics
+        
+        # Rate limiting configuration
+        rate_limit {
+            requests 100
+            window 10s
+            paths "/api/*" "/admin/*"
+        }
+        
+        # Country blocking
+        country_block {
+            enabled true
+            countries CN RU
+            geoip_db_path GeoLite2-Country.mmdb
+        }
+        
+        # Custom response for blocked requests
+        custom_response {
+            status_code 403
+            body "Access Denied by WAF"
+        }
+        
+        # Anomaly threshold
+        anomaly_threshold 15
+        
+        # Logging
+        log_level debug
+        log_file api_waf.log
+        log_json true
+    }
+    
+    reverse_proxy localhost:8080
+}

caddywaf.go

@@ -1,3 +1,18 @@
+// Package caddywaf implements a Web Application Firewall (WAF) middleware for Caddy.
+//
+// This package provides comprehensive security features including:
+//   - Regex-based filtering for URLs, data, and headers
+//   - IP and DNS blacklisting capabilities
+//   - Geographic access control
+//   - Rate limiting
+//   - Anomaly detection and scoring
+//   - Multi-phase request inspection
+//   - Real-time metrics and monitoring
+//
+// The WAF integrates seamlessly with Caddy as an HTTP handler middleware
+// and can be configured via Caddyfile or JSON configuration.
+//
+// Module ID: http.handlers.waf
 package caddywaf
 
 import (
@@ -31,7 +46,7 @@ var (
 )
 
 // Add or update the version constant as needed
-const wafVersion = "v0.0.5" // update this value to the new release version when tagging
+const wafVersion = "v0.0.6" // update this value to the new release version when tagging
 
 // ==================== Initialization and Setup ====================
 

doc.go

@@ -0,0 +1,28 @@
+// Package caddywaf provides Web Application Firewall (WAF) functionality as a Caddy module.
+//
+// Module ID: http.handlers.waf
+// Module type: HTTP handler middleware
+//
+// This module implements comprehensive web security features including:
+//   - Regex-based request filtering
+//   - IP and DNS blacklisting
+//   - Geographic access control
+//   - Rate limiting with configurable windows
+//   - Anomaly detection and scoring
+//   - Multi-phase request inspection
+//   - Real-time metrics and monitoring
+//   - Custom response handling
+//   - Dynamic configuration reloading
+//
+// Installation:
+//   xcaddy build --with github.com/fabriziosalmi/caddy-waf
+//
+// Basic usage in Caddyfile:
+//   waf {
+//       rule_file rules.json
+//       ip_blacklist_file blacklist.txt
+//       metrics_endpoint /waf_metrics
+//   }
+//
+// For complete documentation, see: https://github.com/fabriziosalmi/caddy-waf
+package caddywaf

types.go

@@ -143,7 +143,20 @@ type WAFState struct {
 	ResponseWritten bool
 }
 
-// Middleware struct
+// Middleware is the main WAF middleware struct that implements Caddy's
+// Module, Provisioner, Validator, and MiddlewareHandler interfaces.
+//
+// It provides comprehensive web application firewall functionality including:
+//   - Rule-based request filtering
+//   - IP and DNS blacklisting
+//   - Geographic access control
+//   - Rate limiting
+//   - Anomaly detection
+//   - Custom response handling
+//   - Real-time metrics and monitoring
+//
+// The middleware can be configured via Caddyfile or JSON and integrates
+// seamlessly into Caddy's request processing pipeline.
 type Middleware struct {
 	mu sync.RWMutex