代理http代理服务器，实现自动密码输入，让不支持密码输入的http客户端使用

func main() {logs.Info("http代理服务器的代理")proxyHttpProxy(":8080", "1.14.75.115:7777", "user", "pass")}func proxyHttpProxy(lAddr, addr, user, pass string) {// 构造待编码的字符串auth := user + ":" + pass// 对字符串进行base64编码encoded := base64.StdEncoding.EncodeToString([]byte(auth))authStr := fmt.Sprintf("Proxy-Authorization: Basic %s", encoded)listen, err := net.Listen("tcp", lAddr)if err != nil {logs.Err(err)return}for {accept, acceptErr := listen.Accept()if err != nil {logs.Err(acceptErr)continue}dial, err2 := net.Dial("tcp", addr)if err2 != nil {logs.Err(err2)continue}go hand(accept, dial, authStr)}}var regex = regexp.MustCompile(`Proxy-Authorization: Basic\s+(.*)`)var regex2 = regexp.MustCompile(`HTTP\/1\.[0-2]`)func hand(conn, dial net.Conn, authStr string) {defer conn.Close()go func() {defer dial.Close()re := falsebs := make([]byte, 1024)for {var n intn, err2 := conn.Read(bs)bs = bs[:n]if !re {if regex.MatchString(string(bs)) {bs = regex.ReplaceAll(bs, []byte(authStr))} else {if bytes.Contains(bs, []byte("Proxy-Connection: Keep-Alive")) {bs = bytes.ReplaceAll(bs, []byte("Proxy-Connection: Keep-Alive"), []byte("Proxy-Connection: Keep-Alive\n"+authStr))} else if bytes.Contains(bs, []byte("Proxy-Connection: keep-alive")) {bs = bytes.ReplaceAll(bs, []byte("Proxy-Connection: keep-alive"), []byte("Proxy-Connection: Keep-Alive\n"+authStr))} else if regex2.MatchString(string(bs)) {findString := regex2.FindString(string(bs))bs = bytes.ReplaceAll(bs, []byte(findString), []byte(findString+"\n"+authStr))}}re = true}if err2 != nil {break}_, err2 = dial.Write(bs)if err2 != nil {break}}}()io.Copy(conn, dial)}