Add bind flag for specifying address to bind to

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- New `--bind` option which allows you to specify what address to bind to, defaults to `0.0.0.0`.
 
 ## [v1.1.1] - 2023-12-04
 ### Fixed

README.md

@@ -68,6 +68,8 @@ Usage of simple-proxy:
     	log to standard error as well as files
   -basic-auth string
     	basic auth, format 'username:password', no auth if not provided
+  -bind string
+    	address to bind the proxy server to (default "0.0.0.0")
   -cert string
     	path to cert file
   -key string
@@ -112,7 +114,7 @@ and port.
 On Windows you can use:
 
 ```powershell
-curl.exe 'https://www.random.org/integers/?num=1&min=1&max=5&col=1&base=10&format=plain&rnd=new' --proxy 'http://localhost:8888'
+curl.exe --proxy 'http://localhost:8888' 'https://www.random.org/integers/?num=1&min=1&max=5&col=1&base=10&format=plain&rnd=new'
 ```
 
 ## Contributing

main.go

@@ -32,6 +32,8 @@ func main() {
 	flag.BoolVar(&version, "version", false, "prints current simple-proxy version")
 	var protocol string
 	flag.StringVar(&protocol, "protocol", httpProtocol, "proxy protocol (http or https)")
+	var bind string
+	flag.StringVar(&bind, "bind", "0.0.0.0", "address to bind the proxy server to")
 	var port string
 	flag.StringVar(&port, "port", "8888", "proxy port to listen on")
 	var certPath string
@@ -83,7 +85,7 @@ func main() {
 	}
 
 	server := &http.Server{
-		Addr:    fmt.Sprintf(":%s", port),
+		Addr:    fmt.Sprintf("%s:%s", bind, port),
 		Handler: handler,
 		// Disable HTTP/2.
 		TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)),