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

[plain] view plain copy

1. package main
3. import (
4. "flag"
5. "fmt"
6. "net/http"
7. )
9. func main() {
10. host := flag.String("host", "127.0.0.1", "listen host")
11. port := flag.String("port", "80", "listen port")
13. http.HandleFunc("/hello", Hello)
15. err := http.ListenAndServe(*host+":"+*port, nil)
17. if err != nil {
18. panic(err)
19. }
20. }
22. func Hello(w http.ResponseWriter, req *http.Request) {
23. <p> w.Write([]byte("Hello World"))</p>}

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

[plain] view plain copy

1. package main
3. import (
4. "fmt"
5. "io/ioutil"
6. "net/http"
7. )
9. func main() {
10. response, _ := http.Get("http://localhost:80/hello")
11. defer response.Body.Close()
12. body, _ := ioutil.ReadAll(response.Body)
13. fmt.Println(string(body))
14. }

测试结果：成功