Pourquoi WebResponse ne se termine-t-il jamais lors de la lecture de twitter firehose stream?

Question

La fonction suivante abattrai premiers messages X de Twitter firehose, mais ressemble à des blocs de WebResponse et ne jamais quitter la fonction:

public void GetStatusesFromStream(string username, string password, int nMessageCount) 
{ 
    WebRequest request = WebRequest.Create("http://stream.twitter.com/1/statuses/sample.json"); 
    request.Credentials = new NetworkCredential(username, password); 

    using (WebResponse response = request.GetResponse()) 
    { 
     using (var stream = response.GetResponseStream()) 
     { 
      using (var reader = new StreamReader(stream)) 
      { 
       while (!reader.EndOfStream) 
       { 
        Console.WriteLine(reader.ReadLine()); 

        if (nMessageCount-- < 0) 
         break; 
       } 
       Console.WriteLine("Start iDispose"); 
      } 
      Console.WriteLine("Never gets here!!!"); 
     } 
    } 

    Console.WriteLine("Done - press a key to exit"); 
    Console.ReadLine(); 
} 

Mais les travaux suivants bien:

public void GetStatusesFromStreamOK(string username, string password, int nMessageCount) 
    { 
    byte[] encbuff = System.Text.Encoding.UTF8.GetBytes(username + ":" + password); 
    //request.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(encbuff)); 

    string requestString = "GET /1/statuses/sample.json HTTP/1.1\r\n"; 
    requestString += "Authorization: " + "Basic " + Convert.ToBase64String(encbuff) + "\r\n"; 
    requestString += "Host: stream.twitter.com\r\n"; 
    requestString += "Connection: keep-alive\r\n"; 
    requestString += "\r\n"; 

    using (TcpClient client = new TcpClient()) 
    { 
     client.Connect("stream.twitter.com", 80); 

     using (NetworkStream stream = client.GetStream()) 
     { 
      // Send the request. 
      StreamWriter writer = new StreamWriter(stream); 
      writer.Write(requestString); 
      writer.Flush(); 

      // Process the response. 
      StreamReader rdr = new StreamReader(stream); 

      while (!rdr.EndOfStream) 
      { 
       Console.WriteLine(rdr.ReadLine()); 
       if (nMessageCount-- < 0) 
        break; 
      } 

     } 
    } 

    Console.WriteLine("Done - press a key to exit"); 
    Console.ReadLine(); 

} 

Qu'est-ce que je fais faux?

Answer 1

Cast your WebRequest comme un HttpWebRequest, puis avant l'appel de rupture request.Abort()

Answer 2

On dirait qu'il a quelque chose à voir avec le processus d'élimination ou "en utilisant" ...

Le code suivant fonctionne très bien (pas des déclarations "en utilisant"):

public static void GetStatusesFromStream(string username, string password, int nMessageCount) 
    { 
     WebRequest request = WebRequest.Create("http://stream.twitter.com/1/statuses/sample.json"); 
     request.Credentials = new NetworkCredential(username, password); 

     WebResponse response = request.GetResponse(); 
     { 
      var stream = response.GetResponseStream(); 
      { 
       var reader = new StreamReader(stream); 
       { 
        while (!reader.EndOfStream) 
        { 
         Console.WriteLine(reader.ReadLine()); 

         if (nMessageCount-- < 0) 
          break; 
        } 
       } 
       Console.WriteLine("Never gets here!!!"); 
      } 
     } 

     Console.WriteLine("Done - press a key to exit"); 
     Console.ReadLine(); 
    }