docs: update example codes

Author: yeqown

examples/fasthttp-reverse-proxy-with-bla/proxy.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"log"
 
 	"github.com/valyala/fasthttp"
@@ -15,7 +16,7 @@ var (
 		"localhost:9092": 50,
 	}
 
-	proxyServer, _ = proxy.NewReverseProxyWith(proxy.WithBalancer(weights))
+	proxyServer, _ = proxy.NewReverseProxyWith(proxy.WithBalancer(weights), proxy.WithDebug())
 )
 
 // ProxyHandler ... fasthttp.RequestHandler func
@@ -25,6 +26,7 @@ func ProxyHandler(ctx *fasthttp.RequestCtx) {
 }
 
 func main() {
+	fmt.Printf("listening on :8081\n")
 	if err := fasthttp.ListenAndServe(":8081", ProxyHandler); err != nil {
 		log.Fatal(err)
 	}

examples/server.go

@@ -14,20 +14,24 @@ var (
 
 func main() {
 	flag.Parse()
+	addr := fmt.Sprintf(":%d", *port)
+
 	http.HandleFunc("/foo", func(w http.ResponseWriter, req *http.Request) {
+		clientIP := req.Header.Get("X-Forwarded-For")
+		fmt.Printf("got request from %s\n", clientIP)
+
 		_ = req.ParseForm()
 		timeout, err := strconv.Atoi(req.FormValue("timeout"))
 		if err == nil && timeout > 0 {
 			fmt.Println("timeout=", timeout)
 			time.Sleep(time.Duration(timeout) * time.Second)
 		}
 
-		ip := req.RemoteAddr
 		w.Header().Add("X-Test", "true")
-		_, _ = fmt.Fprintf(w, "bar: %d, %s", 200, ip)
+		_, _ = fmt.Fprintf(w, "response from %s", addr)
 	})
 
-	addr := fmt.Sprintf(":%d", *port)
+	fmt.Printf("listening on %s\n", addr)
 	if err := http.ListenAndServe(addr, nil); err != nil {
 		panic(err)
 	}