ReverseProxy in golang with traffic calculation and daily statistics

• Reverse proxy functionality
• Daily traffic statistics tracking with date separation
• Blocked requests counting
• Daemon mode for background operation
• SOCKS proxy support for upstream connections
• Server failover and load balancing
• Custom headers support
• File extension blocking

./proxyGolang -h

Usage of proxyGolang:
  -l string
        listen on ip:port (default "0.0.0.0:8888")
  -r string
        reverse proxy addr (default "http://idea.lanyus.com:80")
  -h string
        custom headers to add to requests
  -b string
        block file extensions (e.g., exe|zip)
  -d bool
        run as daemon in background (default false)
  -socks string
        SOCKS proxy address (e.g., socks5://127.0.0.1:1080)

./proxyGolang -l "0.0.0.0:8081" -r "https://www.baidu.com"

./proxyGolang -d -l "0.0.0.0:8081" -r "https://www.baidu.com"

./proxyGolang -l "0.0.0.0:8081" -r "https://www.baidu.com" -socks "socks5://127.0.0.1:1080"

The reverse proxy now supports routing upstream connections through a SOCKS proxy. This feature allows you to:

• Route backend connections through SOCKS4, SOCKS4a, or SOCKS5 proxies
• Use SOCKS proxy for better network routing or privacy
• Access geo-restricted backend services
• Work with existing SOCKS proxy infrastructure

Standard URL Format:

• socks5://username:password@host:port - SOCKS5 with authentication
• socks5://host:port - SOCKS5 without authentication
• socks4://host:port - SOCKS4 proxy
• socks4a://host:port - SOCKS4a proxy

Custom Format:

• socks5:host:port:username:password - SOCKS5 with authentication
• socks4:host:port:username:password - SOCKS4 with authentication
• socks4a:host:port:username:password - SOCKS4a with authentication

# Standard URL format
./proxyGolang -l "0.0.0.0:8081" -r "https://example.com" -socks "socks5://user:pass@127.0.0.1:1080"

# Custom format (useful for proxy services)
./proxyGolang -l "0.0.0.0:8081" -r "https://example.com" -socks "socks5:as.proxys5.net:6200:59739141-zone-custom-sessid-rT8p2Grd-sessTime-15:kNSTvoc4"

# SOCKS4 with custom format
./proxyGolang -l "0.0.0.0:8081" -r "https://example.com" -socks "socks4:proxy.example.com:1080:username:password"

The proxy now tracks daily traffic statistics with date separation, including:

• Total number of requests processed per day
• Incoming bytes (from clients) per day
• Outgoing bytes (to clients) per day
• Backend bytes (to/from backend servers) per day
• Blocked requests count per day

Statistics are automatically saved to proxy_stats.json every minute with daily separation. Stats are organized by date and persist across server restarts.

#### Current Day Stats
Visit `http://your-proxy-host:port/stats` to get **current day only** traffic statistics in JSON format:

```json
{
  "requests": 150,
  "incoming_bytes": 0,
  "outgoing_bytes": 245680,
  "backend_bytes": 123450,
  "blocked_count": 5,
  "total_bytes": 369130
}

Visit http://your-proxy-host:port/stats/history to get all historical statistics organized by date:

{
  "daily_stats": {
    "2025-09-01": {
      "request_count": 100,
      "incoming_bytes": 0,
      "outgoing_bytes": 150000,
      "backend_bytes": 75000,
      "blocked_count": 3
    },
    "2025-09-02": {
      "request_count": 200,
      "incoming_bytes": 0,
      "outgoing_bytes": 300000,
      "backend_bytes": 150000,
      "blocked_count": 8
    },
    "2025-09-03": {
      "request_count": 150,
      "incoming_bytes": 0,
      "outgoing_bytes": 245680,
      "backend_bytes": 123450,
      "blocked_count": 5
    }
  }
}

Send a POST request to http://your-proxy-host:port/stats/reset to reset current day counters to zero.

curl -X POST http://your-proxy-host:port/stats/reset

When running as a CLI app, you can now use daemon mode to run the proxy in the background without blocking your terminal:

./run.sh

./run_daemon.sh

Start daemon:

./proxyGolang -d -r "https://example.com" -l "0.0.0.0:8083" -b "exe|zip"

Check running processes:

ps aux | grep proxyGolang

Stop daemon:

kill <PID>

Logs are written to proxy.log when running in daemon mode.

• -ip: Specify server IP for DNS resolution
• -h: Add custom headers (format: "Header1: Value1; Header2: Value2")
• -b: Block specific file extensions (format: "exe|zip|pdf")
• -d: Run as daemon in background (doesn't block terminal)

• GET /stats - Current day statistics
• GET /stats/history - All historical statistics by date
• POST /stats/reset - Reset current day statistics