Golang : HTTP Server Example

Simple tutorial on HTTP server examples with Golang. Run the codes below and point your browser to http://localhost:8080 or http://localhost:8080/replyname/yourname for example 2.

Example 1:

 package main

 import (
 "net/http"
 )

 func SayHelloWorld(w http.ResponseWriter, r *http.Request) {
 html := "Hello"
 html = html + " World"

 w.Write([]byte(html))
 }

 func main() {
 mux := http.NewServeMux()
 mux.HandleFunc("/", SayHelloWorld)

 http.ListenAndServe(":8080", mux)
 }

Example 2:

 package main

 import (
  "net/http"
  "strings"
 )

 func SayHelloWorld(w http.ResponseWriter, r *http.Request) {
  w.Write([]byte("Hello, World!"))
 }

 func ReplyName(w http.ResponseWriter, r *http.Request) {
  URISegments := strings.Split(r.URL.Path, "/")
  w.Write([]byte(URISegments[1]))
 }

 func main() {
  // http.Handler
  mux := http.NewServeMux()
  mux.HandleFunc("/", SayHelloWorld)
  mux.HandleFunc("/replyname", ReplyName)

  http.ListenAndServe(":8080", mux)
 }