[C#] Problema con autenticazione pagina HTML

[leonapster]

Con questa funzione effettuo il login su un forum phpbb:

private string GetSource()
        {

                  // Prepare the HttpWebRequest to send data to Amazon.com
                    string url = string.Format("http://sito.it/forum/ucp.php?mode=login");

                    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                    request.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8) Gecko/20051111 Firefox/1.5";
                    request.Method = "POST";
                    request.Accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
                    request.KeepAlive = true;
                    request.ContentType = @"application/x-www-form-urlencoded";

                    // Send the log-in data
                    string postData =
                        "username=aaaaa" +
                        "&password=bbbbbb" +
                         "&autologin=1" +
                         "&redirect=index.php" +
                         "&login=Log In\"";

           
                byte[] postBuffer = System.Text.Encoding.GetEncoding(0).GetBytes(postData);
                request.ContentLength = postBuffer.Length;
                Stream postDataStream = request.GetRequestStream();

                postDataStream.Write(postBuffer, 0, postBuffer.Length);
                postDataStream.Close();

                // Get the response
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();

                // Read the response from the stream
                Encoding enc = System.Text.Encoding.UTF8;
                StreamReader responseStream = new StreamReader(response.GetResponseStream(), enc, true);

                string responseHtml = responseStream.ReadToEnd();
                response.Close();
                responseStream.Close();

                return responseHtml;
              
        } 

Funziona tutto correttamente, ma le successive pagine che richiedo con la seguente funzione non sono loggate.

  private string ottienipagina(string url) 
       {
           HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
           HttpWebResponse response = (HttpWebResponse)request.GetResponse();
           StreamReader responseStream = new StreamReader(response.GetResponseStream());
           String output = responseStream.ReadToEnd();
           responseStream.Close();
           response.Close();

           return output;
       } 

Come faccio quindi a mantenere attiva la sessione del login? So' che phpbb lascia un cookie, magari potrei usare quello. ma come gestire i cookie?


grazie

[leonapster]

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