我尝试通过http / https代理创建代理到代理的应用程序，但是我从没得到回应

Question

I'm trying write rotating proxy on golang. there are no problems when proxying http: copied the client's request and forwarded it. But when I want to forward https - I can not read the request body, since it is encrypted. I learned that with the help of HTTP CONNECT, it is possible to create the tcp tunnel, but I cannot get the third-party proxy server to work. My scheme of work should be like this: 1) client -> 2) my proxy server -> 3) third-party proxy server -> 4) the site that the client wants but for now I'm stuck between 2 and 3 Can anyone help me?

i get this code as example https://github.com/hkwi/https_tproxy/blob/master/main.go

func handle(con net.Conn) {
    defer con.Close()

    req := &http.Request{
        Method: "CONNECT",
        Host:   con.LocalAddr().String(),
        URL:    &url.URL{},
    }

    conOut, err := net.DialTimeout("tcp", "EXTERNALPROXYIP:8080", 2*time.Second)
    if err != nil {
        log.Printf("proxy error %v", err)
    }
    defer conOut.Close()

    if err := req.WriteProxy(conOut); err != nil {
        log.Printf("proxy error %v", err)
    } else if res, err := http.ReadResponse(bufio.NewReader(conOut), req); err != nil {
        log.Printf("proxy error %v", err)
    } else if res.StatusCode != 200 {
        log.Printf("proxy error %v", err)
    } else {
        sent := make(chan bool)
        go func() {
            _, err := io.Copy(conOut, con)
            if err != nil {
                log.Printf("proxy error %v", err)
            }
            close(sent)
        }()
        _, err := io.Copy(con, res.Body)
        if err != nil {
            log.Printf("proxy error %v", err) ------> ERROR
        }
        _ = <-sent
    }

}

i have issue proxy error invalid byte in chunk length