Go HTTP client, HTTP server

The HTTP client in the Go language, server is very simple. Specific as follows.

HTTP Server

package  mainimport (        "fmt"        "html"        "io/ioutil"        "log"        "net/http")func main() {        http.HandleFunc("/bar", func (w http.ResponseWriter, r *http.Request){                fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path))                if r.Method == "POST" {                        b, err := ioutil.ReadAll(r.Body)                        if err != nil {                                log.Println("Read failed:", err)                        }                        defer r.Body.Close()                        log.Println("b:", string(b))                } else {                        log.Println("ONly support Post")                        w.Write([]byte("Only support post"))                }        })        log.Fatal(http.ListenAndServe(":8080", nil))}

HTTP Client

2. Get method

     package Mainimport ("Io/ioutil" "Log" "Net/http") func main () {URL : = "Http://127.0.0.1:8080/bar" resp, err: = http. Get (URL) if err! = Nil {log. Println ("Get failed:", err) return} Defer resp. Body.close () If Resp. StatusCode! = http. Statusok {log. Println ("StatusCode:", resp. StatusCode)} content, err: = Ioutil. ReadAll (resp. Body) If err! = Nil {log. Println ("Read failed:", err)} log. Println ("Content:", string (content)}  

4. Post mode

   package mainimport (        "bytes"        "io/ioutil"        "log"        "net/http")func main() {        url := "http://127.0.0.1:8080/bar"        contentType := "application/json;charset=utf-8"        b := []byte("Hello, Server")        body := bytes.NewBuffer(b)        resp, err := http.Post(url, contentType, body)        if err != nil {                log.Println("Post failed:", err)                return        }        defer resp.Body.Close()        content, err := ioutil.ReadAll(resp.Body)        if err != nil {                log.Println("Read failed:", err)                return        }        log.Println("content:", string(content))}

Attention:
Response the body after use remember close, namely:

Resp. Body.close ()

For information on how to pass JSON format data, you can refer to the blog Go http pass JSON data

Go HTTP client, HTTP server