golang http client proxy sample code

main.go

package main

import (
	"io"
	"log"
	"net/http"
)

func main() {
	// url := "http://httpbin.org/user-agent"
	url := "https://ip.im/"
	// proxyURL, _ := url.Parse("http://127.0.0.1:7890")
	// proxy := http.ProxyURL(proxyURL)
	// transport := &http.Transport{Proxy: proxy}
	transport := &http.Transport{Proxy: http.ProxyFromEnvironment}
	client := &http.Client{Transport: transport}
	req, _ := http.NewRequest("GET", url, nil)
	req.Header.Set("User-Agent", "curl/8.12.1")
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	log.Println(http.ProxyFromEnvironment(req))
	log.Println(string(body))
}