proxy

fasthttp-reverse-proxy

reverse http proxy handler based on fasthttp.

Features

• HTTP reverse proxy based fasthttp

  • it's faster than golang standard httputil.ReverseProxy library.
  • implemented by fasthttp.HostClient
  • support balance distribute based rounddobin
  • HostClient object pool with an overlay of fasthttp connection pool.

• WebSocket reverse proxy.

Get started

HTTP (with balancer option)

var (
	proxyServer = proxy.NewReverseProxy("localhost:8080")

	// use with balancer
	// weights = map[string]proxy.Weight{
	// 	"localhost:8080": 20,
	// 	"localhost:8081": 30,
	// 	"localhost:8082": 50,
	// }
	// proxyServer = proxy.NewReverseProxy("", proxy.WithBalancer(weights))

)

// ProxyHandler ... fasthttp.RequestHandler func
func ProxyHandler(ctx *fasthttp.RequestCtx) {
	// all proxy to localhost
	proxyServer.ServeHTTP(ctx)
}

func main() {
	if err := fasthttp.ListenAndServe(":8081", ProxyHandler); err != nil {
		log.Fatal(err)
	}
}

Websocket

var (
	proxyServer *proxy.WSReverseProxy
	once        sync.Once
)

// ProxyHandler ... fasthttp.RequestHandler func
func ProxyHandler(ctx *fasthttp.RequestCtx) {
	once.Do(func() {
		var err error
		proxyServer, err = proxy.NewWSReverseProxyWith(
			proxy.WithURL_OptionWS("ws://localhost:8080/echo"),
			// [OPTIONAL]: you can override path from `WithURL_OptionWS`
			//             by providing WithDynamicPath_OptionWS.
			proxy.WithDynamicPath_OptionWS(true, proxy.DefaultOverrideHeader),
		)
		if err != nil {
			panic(err)
		}
	})

	switch string(ctx.Path()) {
	case "/echo":
		// [OPTIONAL]: you can override path from `WithURL_OptionWS`
		//             by providing proxy.DefaultOverrideHeader (or any custom) header  
		// ctx.Request.Header.Set(proxy.DefaultOverrideHeader, "/real_echo")
		proxyServer.ServeHTTP(ctx)
	case "/":
		fasthttp.ServeFileUncompressed(ctx, "./index.html")
	default:
		ctx.Error("Unsupported path", fasthttp.StatusNotFound)
	}
}

func main() {
	log.Println("serving on: 8081")
	if err := fasthttp.ListenAndServe(":8081", ProxyHandler); err != nil {
		log.Fatal(err)
	}
}

Usages

• HTTP reverse proxy
• HTTP reverse proxy with object pool
• Websocket reverse proxy

Contrast

• HTTP benchmark
• Websocket benchmark

References

• fasthttp
• standard httputil.ReverseProxy
• fasthttp/websocket
• koding/websocketproxy

Thanks