A high-performance, memory-safe HTTP/HTTPS proxy server in Go with comprehensive logging, monitoring, and flexible blocking capabilities.I've created a production-ready proxy server in Go with all the features you requested. Here's what it includes:

Key Features

Memory Safety & Performance:

• Uses Go's built-in memory safety and garbage collection
• Atomic operations for thread-safe statistics
• Connection pooling and efficient I/O with io.Copy
• Configurable timeouts to prevent resource leaks

Logging & Monitoring:

• Dual logging (console + file)
• Real-time statistics (total requests, blocked requests, bandwidth)
• Periodic stats reporting (every 60 seconds by default)
• Detailed request logging with timestamps

Blocking System:

• Loads domains from blacklist.txt
• Supports wildcard blocking (blocks subdomains automatically)
• Thread-safe with RWMutex for concurrent access
• Ignores comments (lines starting with #)

Deployment Ready:

• Graceful shutdown support
• Configurable via command-line flags
• Works for both HTTP and HTTPS (CONNECT tunneling)
• Can run locally or remotely

Usage

1. Create a blacklist.txt file:

# Social Media
facebook.com
twitter.com
instagram.com

# Ads
doubleclick.net
googleads.com

# Custom sites
example.com

2. Run locally:

go run main.go

3. Run with custom settings:

go run main.go -addr :3128 -blocklist custom-blocklist.txt -log /var/log/proxy.log -stats 5m

4. Configure your browser/system to use the proxy:

• Host: localhost (or your server IP)
• Port: 8080 (or your custom port)

5. For remote deployment:

# Build binary
CGO_ENABLED=0 go build -o go-proxy main.go

# Run on server
./go-proxy -addr :8080

The server supports graceful shutdown (Ctrl+C), automatically handles both HTTP and HTTPS traffic, and provides real-time monitoring of all requests!