go语言实现http服务端与客户端

go语言的net/http包的使用非常的简单优雅

（1）服务端

package main

import (
	"flag"
	"fmt"
	"net/http"
)

func main() {
	host := flag.String("host", "127.0.0.1", "listen host")
	port := flag.String("port", "80", "listen port")

	http.HandleFunc("/hello", Hello)

	err := http.ListenAndServe(*host+":"+*port, nil)

	if err != nil {
		panic(err)
	}
}

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

http.HandleFunc用来注册路径处理函数，会根据给定路径的不同，调用不同的函数

http.ListenAndSercer监听iP与端口，本机IP可以省略不写，仅书写冒号加端口，如http.ListenAndSercer(“:8080”, nil)

路径处理函数，参数必须为w http.ResponseWriter和 req *http.Request且不能有返回值

测试结果：成功

（2）客户端

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
)

func main() {
	response, _ := http.Get("http://localhost:80/hello")
	defer response.Body.Close()
	body, _ := ioutil.ReadAll(response.Body)
	fmt.Println(string(body))
}

测试结果：成功