PUT请求发送JSON对象

http.Client并没有提供PUT请求的快捷方式，所以我们构造一个http.Request对象并使用http.Client.Do(req *http.Request)来完成请求。

Go

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"time"
)

type User struct {
	Name  string
	Email string
}

func main() {
	user := User{
		Name:  "John Doe",
		Email: "[e-mail]",
	}

	d, err := json.Marshal(user)
	if err != nil {
		log.Fatalf("json.Marshal() failed with '%s'\n", err)
	}

	client := &http.Client{}
	client.Timeout = time.Second * 15

	uri := "https://httpbin.org/put"
	body := bytes.NewBuffer(d)
	req, err := http.NewRequest(http.MethodPut, uri, body)
	if err != nil {
		log.Fatalf("http.NewRequest() failed with '%s'\n", err)
	}

	req.Header.Set("Content-Type", "application/json; charset=utf-8")
	resp, err := client.Do(req)
	if err != nil {
		log.Fatalf("client.Do() failed with '%s'\n", err)
	}

	defer resp.Body.Close()
	d, err = ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatalf("ioutil.ReadAll() failed with '%s'\n", err)
	}

	fmt.Printf("Response status code: %d, text:\n%s\n", resp.StatusCode, string(d))
}

Output

Response status code: 200, text:
{
  "args": {}, 
  "data": "{\"Name\":\"John Doe\",\"Email\":\"[e-mail]\"}", 
  "files": {}, 
  "form": {}, 
  "headers": {
    "Accept-Encoding": "gzip", 
    "Content-Length": "49", 
    "Content-Type": "application/json; charset=utf-8", 
    "Host": "httpbin.org", 
    "User-Agent": "Go-http-client/2.0", 
    "X-Amzn-Trace-Id": "Root=1-5ebf5b94-36212820e3fd84b4a60224cc"
  }, 
  "json": {
    "Email": "[e-mail]", 
    "Name": "John Doe"
  }, 
  "origin": "199.168.140.214", 
  "url": "https://httpbin.org/put"
}