C# 在使用代理之前测试它们是否正常工作

Question

我想在使用之前检查我列表中的代理是否正常工作，可以吗？

HTTP/HTTPS 很容易，因为你只需要使用 webclient 而不是 socks？

我认为这对所有人都有效

public static bool SoketConnect(string addresse)
    {
        string[] proxy = addresse.Split(':');
        if (proxy.Count() == 2)
        {
            string host = proxy[0];
            int port = Convert.ToInt32(proxy[1]);

            var is_success = false;
            try
            {
                var connsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                connsock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 200);
                System.Threading.Thread.Sleep(500);
                var hip = IPAddress.Parse(host);
                var ipep = new IPEndPoint(hip, port);
                connsock.Connect(ipep);
                    try
                    {
                        byte[] outStream = System.Text.Encoding.ASCII.GetBytes("ping");
                        byte[] inStream = new byte[100];
                        connsock.Send(outStream);
                        connsock.ReceiveTimeout = 500;
                        connsock.Receive(inStream);
                        string message = System.Text.Encoding.ASCII.GetString(inStream);
                        foreach (var bytes in inStream)
                        {
                            if (bytes != 0)
                            {
                                is_success = true;
                                break;
                            }
                        }
                        connsock.Disconnect(false);
                    }
                    catch(Exception ex)
                    {
                        is_success = false;
                    }
                connsock.Close();
            }
            catch (Exception ex)
            {
                is_success = false;
            }
            return is_success;
        }
        else
            return false;
    }

但我总是遇到异常

"底层连接已关闭：连接已关闭 意外。” System.Net.WebException

tldr;如何检查我的 socks 代理是否正常工作（回到如何使用 socks 代理）

编辑：仍然没有帮助，需要答案 EDIT2：只 ping 代理不是正确的做法

Answer 1

据我所知，您必须使用它们来查看它们是否正常工作。我建议以下之一：

1. ping - Ping 类在：

   using System.Net.NetworkInformation;
   
   private static bool CanPing(string address)
   {
       Ping myping = new Ping();
   
       try
       {
           PingReply reply = myping.Send(address, 2000);
   
           if (reply == null) 
               return false;
   
           return (reply.Status == IPStatus.Success);
       }
       catch (PingException e)
       {
           return false;
       }
   }
   

2. 执行“我的 IP 是什么？”通过代理：

   public static void TestProxies() 
   {
       var lowp = new List<WebProxy> { new WebProxy("1.2.3.4", 8080), new WebProxy("5.6.7.8", 80) };
   
       Parallel.ForEach(lowp, wp => {
   
           var success = false;
           var errorMsg = "";
           var sw = new Stopwatch();
   
           try 
           {
                 sw.Start();
                 var response = new RestClient 
                 {
                   BaseUrl = "https://webapi.theproxisright.com/",
                   Proxy = wp
                 }.Execute(new RestRequest { Resource = "api/ip", Method = Method.GET, Timeout = 10000, RequestFormat = DataFormat.Json });
   
                 if (response.ErrorException != null) 
                    throw response.ErrorException;
   
                 success = (response.Content == wp.Address.Host);
           } 
           catch (Exception ex) 
           {
               errorMsg = ex.Message;
           } 
           finally 
           {
               sw.Stop();
           }
         });
   }