Python 语言和 go 语言 http 请求使用代理的差异( Python 可以正常跑， go 不行)

请大佬们帮忙看下，go 怎么才能通过代理成功发起请求

我也试了 php 也不行

python 代码

import requests


def send_request_via_proxy(*args, **kwargs):
    baidu_proxy = 'http://cloudnproxy.baidu.com:443'
    kwargs['proxies'] = {'http': baidu_proxy, 'https': baidu_proxy}
    if 'headers' not in kwargs:
        kwargs['headers'] = {}
    if 'User-Agent' not in kwargs['headers']:
        kwargs['headers'][
            'User-Agent'] = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36 baiduboxapp/13.10.0.10'

    resp = requests.request(*args, **kwargs)
    print(resp.request.headers)
    print(resp.request)
    return resp


if __name__ == '__main__':
    api = 'https://pubstatic.b0.upaiyun.com/?_upnode'
    ip_info = send_request_via_proxy('GET', api).json()
    print(ip_info['remote_addr'])
    print(ip_info['remote_addr_location'])

go 代码

package main

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"net/url"
	"time"
)

func main() {
	URL, _ := url.Parse("http://cloudnproxy.baidu.com:443")
	client := &http.Client{
		Transport: &http.Transport{
			TLSHandshakeTimeout: 30 * time.Second,
			Proxy:               http.ProxyURL(URL),
		},
	}
	req, err := http.NewRequest("GET", "https://pubstatic.b0.upaiyun.com/?_upnode", nil)
	if err != nil {
		log.Fatal(err)
	}
	req.Header.Set("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36(KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36 baiduboxapp/13.10.0.10")
	resp, err := client.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	defer resp.Body.Close()
	bodyText, err := io.ReadAll(resp.Body)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("%s\n", bodyText)
}