go ?http client, http server

Go语言中的HTTP client， server非常简单。具体如下。

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

1. GET方式

   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))}

2. POST方式

   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))}

注意：
response的Body使用后记得close，即：

resp.Body.Close()

关于如何传递json格式数据，可以参考博文go http 传递json数据