C# HttpWebRequest 通过代理请求

Question

我试图让我的程序通过代理工作，但它不想(System.Net.WebException:操作超时)。没有代理一切都很好

代码如下:

        string proxy = "154.46.33.157";
        int port = 8080;
        ASCIIEncoding encoding = new ASCIIEncoding();
        string postData = "email=" + email + "&pass=" + pass;
        byte[] data = encoding.GetBytes(postData);
        WebProxy myproxy = new WebProxy(proxy, port);
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create("SITE");
        WebHeaderCollection myWebHeaderCollection = request.Headers;
        request.CookieContainer = sCookie;
        request.Method = "POST";
        request.Proxy = myproxy;
        request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        request.ContentLength = data.Length;
        request.Host = "HOST";
        request.UserAgent = "[UA]";
        request.Referer = "reffer";
        request.KeepAlive = false;
        request.Timeout = 20000;

        Stream stream = request.GetRequestStream(); // TIMEOUT HERE
        stream.Write(data, 0, data.Length);
        stream.Close();
        request.GetResponse()
            .Close();

同时这段代码运行良好

        string proxy = "154.46.33.157";
        int port = 8080;
        WebProxy myproxy = new WebProxy(proxy, port);
        WebRequest req = WebRequest.Create("SITE");
        req.Timeout = 5000;
        req.GetResponse();

proxy 是活的，我已经通过 IE 测试过了。我应该怎么做才能修复它？

Answer 1

一些建议:

1. 您是否使用 IP 地址作为代理？
2. 您需要登录该代理吗？proxy.Credentials = new NetworkCredential(User, Password);
3. 尝试减少 header ，从几个开始，如果可行，继续一个一个地添加

更新:对于主机 - 它是一个有效的 URL 吗？您是否输入了有效的端口号？像 www.contoso.com:8080