http 서버 코드

 package main

 import (

     "net/http"

 )

 func helloWorld(w http.ResponseWriter, r *http.Request) {

    if r.URL.Path != "/" {

             http.NotFound(w, r)

             return

     }

     switch r.Header.Get("Accept") {

     case "application/json":

             w.Header().Set("Content-Type", "application/json; charset=utf-8")

             w.Write([]byte(`{"message": "Hello World"}`))

    case "application/xml":

             w.Header().Set("Content-Type", "application/xml; charset=utf-8")

             w.Write([]byte(`<?xml version="1.0" encoding="utf-8"?><Message>Hello World</Message>`)

    default:

             w.Header().Set("Content-Type", "text/plain; charset=utf-8")

             w.Write([]byte("Hello World\n"))

     }

 }

 func main() {

     http.HandleFunc("/", helloWorld)

     http.ListenAndServe(":8000", nil)

 }

curl -si -H 'Accept: application/json' http://localhost:8000

package main

import (

    "net/http"

)

func helloWorld(w http.ResponseWriter, r *http.Request) {

    if r.URL.Path != "/" {

            http.NotFound(w, r)

            return

    }

    switch r.Method {

    case "GET":

            w.Write([]byte("Received a GET request\n"))

    case "POST":

            w.Write([]byte("Received a POST request\n"))

    default:

            w.WriteHeader(http.StatusNotImplemented)

            w.Write([]byte(http.StatusText(http.StatusNotImplemented)) + "\n")

    }

}

func main() {

    http.HandleFunc("/", helloWorld)

    http.ListenAndServe(":8000", nil)

}

curl -si -X GET http://localhost:8000

package main

import (

    "fmt"

    "io/ioutil"

    "log"

    "net/http"

)

func helloWorld(w http.ResponseWriter, r *http.Request) {

    if r.URL.Path != "/" {

            http.NotFound(w, r)

            return

    }

    switch r.Method {

    case "GET":

            for k, v := range r.URL.Query() {

                   fmt.Printf("%s: %s\n", k, v)

            }

            w.Write([]byte("Received a GET request\n"))

   case "POST":

            reqBody, err := ioutil.ReadAll(r.Body)

    if err != nil {

                     log.Fatal(err)

            }

            fmt.Printf("%s\n", reqBody)

            w.Write([]byte("Received a POST request\n"))

   default:

            w.WriteHeader(http.StatusNotImplemented)

            w.Write([]byte(http.StatusText(http.StatusNotImplemented)))

   }

}

func main() {

    http.HandleFunc("/", helloWorld)

    http.ListenAndServe(":8000", nil)

}

curl -si -X POST -d "test" http://localhost:8000/