Windows XP Socket erreur

Question

J'ai une application client socket qui donne « une demande d'envoyer ou de recevoir des données n'a pas été autorisée car le socket est pas connecté .. »

public void Connect() 
    { 
     if (mPort == 0) throw new Exception("No ip set to client."); 
     mSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
     mSocket.BeginConnect(mHost, mPort, new AsyncCallback(OnConnected), mSocket); 
     mReceiveBuffer = new byte[MAX_RECEIVE_BUFFER]; 
    } 


private void OnConnected(IAsyncResult ar) 
    { 
     try 
     { 
      mSocket.EndConnect(ar); 
      BeginReceive(); 
     } 
     catch 
     { 
      Disconnect(); 
     } 
    } 

     private void BeginReceive() 
    { 
     mSocket.BeginReceive(inBuffer, 0, 300, SocketFlags.None, new AsyncCallback(onDataRecieve), mSocket); 
    } 

L'erreur jette sur mSocket.BeginReceive. Cela ne se produit que sur Windows XP. Est-ce que quelqu'un sait pourquoi cela se produit?

Answer 1

Vous ne vérifiez pas le résultat. La tentative de connexion échoue et votre OnConnect se déclenche après un délai d'expiration.

Voici un exemple complet. Fonctionne bien pour moi et devrait bien fonctionner pour vous. Vous remarquerez que je vérifie que je me suis connecté et que je garde le fil qui fait tout le travail en vie.

public class Program 
{ 
    static void Main(string[] args) 
    { 
     AsyncSocketTest test = new AsyncSocketTest(); 

     test.SocketTest(); 
    } 
} 

public class AsyncSocketTest 
{ 
    private Socket socket; 
    private byte[] buffer; 
    private volatile bool keepRunning; 

    public void SocketTest() 
    { 
     Console.Out.WriteLine("Starting connect..."); 
     Console.Out.Flush(); 

     buffer = new byte[65536]; 

     keepRunning = true; 

     // connect to antiduh.com's web server 
     socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
     socket.BeginConnect(IPAddress.Parse("129.21.49.41"), 80, new AsyncCallback(OnConnect), null); 

     // Keep the main thread alive while all of the async requests run. 
     while (keepRunning) { Thread.Sleep(500); } 

     Console.Out.WriteLine("Quitting."); 
     Console.Out.Flush(); 
    } 

    private void OnConnect(IAsyncResult result) 
    { 
     try 
     { 
      if (result.IsCompleted == false) 
      { 
       Console.Out.WriteLine("OnConnect got incomplete result: " + result); 
      } 
      else 
      { 
       socket.EndConnect(result); 

       if (result.IsCompleted == false) 
       { 
        Console.Out.WriteLine("OnConnect got incomplete result: " + result); 
       } 
       else 
       { 

        Console.Out.WriteLine("Sending..."); 
        byte[] requestBytes; 
        string requestString = 
         "GET/HTTP/1.1\n" + 
         "Host: antiduh.com\n" + 
         "\n"; 

        requestBytes = Encoding.ASCII.GetBytes(requestString); 
        socket.Send(requestBytes); 

        Console.Out.WriteLine("Starting receive..."); 
        socket.BeginReceive(
         buffer, 
         0, 
         buffer.Length, 
         SocketFlags.None, 
         new AsyncCallback(OnReceive), 
         null 
        ); 
       } 
      } 
     } 
     catch (Exception e) 
     { 
      Console.Out.WriteLine("Caught exception in OnConnect: " + e); 
     } 
     finally 
     { 
      Console.Out.Flush(); 
     } 
    } 

    private void OnReceive(IAsyncResult result) 
    { 
     int received = socket.EndReceive(result); 
     string responseStr; 

     Console.Out.WriteLine("Received data: Length: {0}. Data: \r\n\r\n", received); 
     Console.Out.Flush(); 

     responseStr = Encoding.ASCII.GetString(buffer, 0, received); 

     Console.Out.WriteLine(responseStr); 
     Console.Out.Flush(); 

     socket.Close(); 
     keepRunning = false; 
    } 
} 

Sortie:

Starting connect... 
Sending... 
Starting receive... 
Received data: Length: 1137. Data: 


HTTP/1.1 200 OK 
Date: Tue, 02 Jul 2013 12:58:19 GMT 
Server: Apache/2.2.24 (FreeBSD) PHP/5.4.16 SVN/1.8.0 mod_ssl/2.2.24 OpenSSL/1.0.1e DAV/2 
Last-Modified: Tue, 11 Jul 2006 05:03:19 GMT 
ETag: "352-418473fcd33c0" 
Accept-Ranges: bytes 
Content-Length: 850 
Content-Type: text/html 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<title>welcome to antiduh</title> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> 
<style type="text/css"> 
<!-- 
body { 
    background-color: #6666CC; 
} 
--> 
</style></head> 

<body> 
<img src="index.gif" alt="index of steak" width="912" height="528" border="0" align="middle" usemap="#Map"> 
<map name="Map"> 
    <area shape="rect" coords="234,97,392,132" href="about.htm" alt="about"> 
    <area shape="rect" coords="691,150,846,186" href="projects.htm" alt="projects"> 
    <area shape="rect" coords="740,363,884,399" href="links.htm" alt="links"> 
    <area shape="rect" coords="423,478,562,511" href="misc.htm" alt="misc"> 
    <area shape="rect" coords="37,292,175,324" href="resume.htm" alt="resume"> 
</map> 
</body> 
</html> 

Quitting.