关于go语言接入爬虫代理的代码demo

 package main

        import (
            "net/url"
            "net/http"
            "bytes"
            "fmt"
            "io/ioutil"
            "math/rand"
            "time"
            "strconv"
        )

        // 代理服务器(产品官网 www.16yun.cn)
        const ProxyServer = "t.16yun.cn:31111"

        type ProxyAuth struct {
            Username string
            Password string
        }

        func (p ProxyAuth) ProxyClient() http.Client {
           if p.Username != nil and p.Password != nil{
               proxyURL, _ := url.Parse("http://" + p.Username + ":" + p.Password + "@" + ProxyServer)
           }else{
               proxyURL, _ := url.Parse("http://" + ProxyServer)
           }
           return http.Client{Transport: &http.Transport{Proxy:http.ProxyURL(proxyURL)}}
        }

        func main()  {
            targetURI := "http://httpbin.org/ip"

            // 初始化 proxy http client
            client := ProxyAuth{License: "username", SecretKey: "password"}.ProxyClient()

            request, _ := http.NewRequest("GET", targetURI, bytes.NewBuffer([] byte(``)))

            // 设置Proxy-Tunnel
            // rand.Seed(time.Now().UnixNano())
            // tunnel := rand.Intn(10000)
            // request.Header.Set("Proxy-Tunnel", strconv.Itoa(tunnel) )

            response, err := client.Do(request)

            if err != nil {
                panic("failed to connect: " + err.Error())
            } else {
                bodyByte, err := ioutil.ReadAll(response.Body)
                if err != nil {
                    fmt.Println("读取 Body 时出错", err)
                    return
                }
                response.Body.Close()

                body := string(bodyByte)

                fmt.Println("Response Status:", response.Status)
                fmt.Println("Response Header:", response.Header)
                fmt.Println("Response Body:/n", body)
            }
        }