每个请求的C＃WebClient NTLM身份验证启动

2 回答

• 1

  经过10天尝试我能想到的一切并在此过程中学到很多东西，我已经找到了解决这个问题的方法 .

  诀窍是通过重写 HttpWebRequest 并将属性值设置为true来启用UnsafeAuthenticatedConnectionSharing .

  您可能希望将其与ConnectionGroupName属性组合，以避免未经过身份验证的应用程序可能使用该连接 .

  以下是问题的样本按预期工作 . 它打开一个NTLM身份验证连接并重用它：

  using System;
  using System.Net;
  
  namespace ConsoleApplication1
  {
      class Program
      {
          static void Main(string[] args)
          {
              string URL_status = "http://localhost/status";
  
              CredentialCache myCache = new CredentialCache();
              myCache.Add(new Uri(URL_status), "NTLM", new NetworkCredential("username", "password", "domain"));
  
              MyWebClient WebClient = new MyWebClient();
              WebClient.Credentials = myCache;
  
              for (int i = 1; i <= 5; i++)
              {
                  string Result = WebClient.DownloadString(new Uri(URL_status));
                  Console.WriteLine("Try " + i.ToString() + ": " + Result);
              }
  
              Console.Write("Done");
              Console.ReadKey();
          }
      }
  
      public class MyWebClient : WebClient
      {
          protected override WebRequest GetWebRequest(Uri address)
          {
              WebRequest request = (WebRequest)base.GetWebRequest(address);
  
              if (request is HttpWebRequest) 
              {
                  var myWebRequest = request as HttpWebRequest;
                  myWebRequest.UnsafeAuthenticatedConnectionSharing = true;
                  myWebRequest.KeepAlive = true;
              }
  
              return request;
          }
      }   
  }
  

  在这一点上，我还要感谢@Falco Alexander的所有帮助;虽然他的建议对我不起作用，但他确实指出了我正确的方向寻找并最终找到答案 .

  回复于 2024-04-28T05:23:13+08:00
• 11

  检查你的IIS的设置，例如，虽然这应该是默认的 .

  <windowsAuthentication
     enabled="True"
     authPersistSingleRequest="False"
     UseKernelMode>
  
  </windowsAuthentication> 
  

  参考：https://msdn.microsoft.com/en-us/library/aa347472.aspx

  你检查了你的localhost IIS所在的区域吗？在使用WinInet时，这也是客户端的一个陷阱 . 检查WebClient的默认行为 .

  ---

  编辑：

  在重现错误后，我可以弄清楚它是WebClient缺少的NTLM preauthentication 实现，它使您免于单个401请求：

  var WebClient = new PreAuthWebClient();
  WebClient.Credentials = new NetworkCredential("user", "pass","domain");
  
  //Do your GETs 
  
  Public class PreAuthWebClient: WebClient
  {
      protected override WebRequest GetWebRequest (Uri address)
      {
          WebRequest request = (WebRequest) base.GetWebRequest (address);
          request.PreAuthenticate = true;
          return request;
    }
  }
  

  回复于 2024-04-28T05:23:13+08:00