【GO】http請求代理

package test

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"net/url"
	"testing"
)

var proxyConf = "112.195.81.161:8118"

func buildHtppClient(isProxy bool) *http.Client {
	var proxy func(*http.Request) (*url.URL, error) = nil
	if isProxy {
		proxy = func(_ *http.Request) (*url.URL, error) {
			return url.Parse("http://" + proxyConf)
		}
	}
	transport := &http.Transport{Proxy: proxy}
	client := &http.Client{Transport: transport}
	return client
}

func Test_crawler(t *testing.T) {
	url := "http://httpbin.org/get"
	client := buildHtppClient(true)

	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		log.Fatal(err)
	}

	res, err := client.Do(req)
	if err != nil {
		log.Fatal(err)
	}

	defer res.Body.Close()
	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Println(string(body))

}