Go使用http.NewRequest()创建一个带Cookies的Post请求

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示例代码

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/http/cookiejar"
	"net/url"
	"strings"
	"time"
)

func main() {
	u := url.Values{}

	// 请求参数
	u.Add("message", "text")

	// 设置cookies
	cookies := []*http.Cookie{
		{Name: "AAA", Value: "aaa"},
		{Name: "BBB", Value: "bbb"},
	}

	// 使用cookieJar管理cookies
	cookieURL, _ := url.Parse("https://httpbin.org")
	jar, err := cookiejar.New(nil)
	jar.SetCookies(cookieURL, cookies)

	// 创建一个客户端
	client := &http.Client{
		Timeout: 10 * time.Second,
		Jar:     jar,
	}

	// 创建一个请求
	req, err := http.NewRequest("POST", "https://httpbin.org/post", strings.NewReader(u.Encode()))
	if err != nil {
		fmt.Println(err)
	}

	// 添加 Headers
	req.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36")
	req.Header.Add("content-type", "application/x-www-form-urlencoded")

	// 执行请求
	resp, err := client.Do(req)
	if err != nil {
		fmt.Println(err)
	}

	// 读取响应
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		fmt.Println(err)
	}

	// 延迟关闭
	defer resp.Body.Close()

	// 输出响应
	fmt.Println(string(body))
}

响应示例

可以看到，headers 中带了 cookies

{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {
    "message": "text"
  }, 
  "headers": {
    "Accept-Encoding": "gzip", 
    "Content-Length": "12", 
    "Content-Type": "application/x-www-form-urlencoded", 
    "Cookie": "AAA=aaa; BBB=bbb", 
    "Host": "httpbin.org", 
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36", 
    "X-Amzn-Trace-Id": "Root=1-62f0bb57-70b1532d31ad5d297bfe1f33"
  }, 
  "json": null, 
  "origin": "", 
  "url": "https://httpbin.org/post"
}