我对 https://qrng.physik.hu-berlin.de/ 的帖子请求失败了，为什么

https://qrng.physik.hu-berlin.de/的页面提供了一个高比特率量子数生成器网络服务，我正在尝试访问该服务。

但是我无法做到这一点。这是我当前的代码：

using System;
using System.Collections.Generic;
using System.Linq;
using S=System.Text;
using System.Security.Cryptography;
using System.IO;
namespace CS_Console_App
{
    class Program
    {
        static void Main()
        {
            System.Net.ServicePointManager.Expect100Continue = false;
            var username = "testuser";
            var password = "testpass";
            System.Diagnostics.Debug.WriteLine(Post("https://qrng.physik.hu-berlin.de/", "username="+username+"&password="+password));
            Get("http://qrng.physik.hu-berlin.de/download/sampledata-1MB.bin");
        }
        public static void Get(string url)
        {
            var my_request = System.Net.WebRequest.Create(url);
            my_request.Credentials = System.Net.CredentialCache.DefaultCredentials;
            var my_response = my_request.GetResponse();
            var my_response_stream = my_response.GetResponseStream();
            var stream_reader = new System.IO.StreamReader(my_response_stream);
            var content = stream_reader.ReadToEnd();
            System.Diagnostics.Debug.WriteLine(content);
            stream_reader.Close();
            my_response_stream.Close();
        }
        public static string Post(string url, string data)
        {

            string vystup = null;
            try
            {
                //Our postvars
                byte[] buffer = System.Text.Encoding.ASCII.GetBytes(data);
                //Initialisation, we use localhost, change if appliable
                System.Net.HttpWebRequest WebReq = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
                //Our method is post, otherwise the buffer (postvars) would be useless
                WebReq.Method = "POST";
                //We use form contentType, for the postvars.
                WebReq.ContentType = "application/x-www-form-urlencoded";
                //The length of the buffer (postvars) is used as contentlength.
                WebReq.ContentLength = buffer.Length;
                //We open a stream for writing the postvars
                Stream PostData = WebReq.GetRequestStream();
                //Now we write, and afterwards, we close. Closing is always important!
                PostData.Write(buffer, 0, buffer.Length);
                PostData.Close();
                //Get the response handle, we have no true response yet!
                System.Net.HttpWebResponse WebResp = (System.Net.HttpWebResponse)WebReq.GetResponse();
                //Let's show some information about the response
                Console.WriteLine(WebResp.StatusCode);
                Console.WriteLine(WebResp.Server);
                //Now, we read the response (the string), and output it.
                Stream Answer = WebResp.GetResponseStream();
                StreamReader _Answer = new StreamReader(Answer);
                vystup = _Answer.ReadToEnd();
                //Congratulations, you just requested your first POST page, you
                //can now start logging into most login forms, with your application
                //Or other examples.
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return vystup.Trim() + "'n";
        }
    }
}

当我尝试对 http://qrng.physik.hu-berlin.de/download/sampledata-1MB.bin 执行获取请求时，我遇到了 403 禁止错误。

调试 abit 后，我意识到即使我提供了有效的用户名和密码，在我的 POST 请求之后发送的响应 html 表明我在 POST 请求后实际上没有登录到系统。

有谁知道为什么会这样，以及我如何解决它来调用服务？

碰

碰。 任何人都可以让它工作还是该网站只是一个骗局？

my_request.Credentials = System.Net.CredentialCache.DefaultCredentials

my_request.Credentials = new NetworkCredential(UserName,Password);