HTTPConnection.cs
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using System.Timers;
using System.Net;
using System.IO;
using Anculus.Core;
using Galaxium.Core;
using Galaxium.Protocol;
namespace Galaxium.Protocol.Msn
{
internal enum HTTPActions { Open, Poll, None };
internal enum HTTPServerTypes { NS, SB };
public class HTTPConnection : AbstractConnection
{
private HTTPActions _action = HTTPActions.None;
private string _ip = String.Empty;
private HTTPServerTypes _serverType = HTTPServerTypes.NS;
private string _sessionID = String.Empty;
private System.Timers.Timer _pollTimer;
private bool _connected = false;
private bool _sending = false;
internal string IP
{
get { return _ip; }
set { _ip = value; }
}
internal HTTPActions Action
{
get { return _action; }
set { _action = value; }
}
internal HTTPServerTypes Type
{
get { return _serverType; }
set { _serverType = value; }
}
public override bool IsConnected
{
get
{
return _connected;
}
}
public override bool IsSending
{
get { return _sending; }
}
public HTTPConnection (ISession session, IConnectionInfo connectionInfo) : base (session, connectionInfo)
{
_pollTimer = new System.Timers.Timer (2000);
_pollTimer.Elapsed += PollForData;
_pollTimer.AutoReset = true;
}
public override void Connect ()
{
Log.Debug ("Connect to {0}:{1}", _connectionInfo.HostName, _connectionInfo.Port);
_intendedDisconnect = false;
OnEstablished (new ConnectionEventArgs (this));
_connected = true;
OnAfterConnect (new ConnectionEventArgs (this));
}
protected override void Dispose (bool disposing)
{
if (!_disposed)
{
if (disposing)
{
if (IsConnected)
{
Log.Debug("Disconnecting during disposing of abstract connection.");
Disconnect ();
}
}
}
_disposed = true;
}
public override void Reconnect ()
{
Disconnect ();
Connect ();
}
public override void Disconnect ()
{
_intendedDisconnect = true;
if (IsConnected)
{
_connected = false;
if (_pollTimer.Enabled)
_pollTimer.Stop();
OnClosed (new ConnectionEventArgs (this));
}
}
private string GenerateURI ()
{
StringBuilder sb = new StringBuilder();
sb.Append ("http://");
sb.Append (ConnectionInfo.HostName);
sb.Append ("/gateway/gateway.dll?");
switch (Action)
{
case HTTPActions.Open:
sb.Append ("Action=open&");
sb.Append ("Server="+Type.ToString()+"&");
sb.Append ("IP="+IP);
break;
case HTTPActions.Poll:
sb.Append ("Action=poll&");
sb.Append ("SessionID="+_sessionID);
break;
case HTTPActions.None:
sb.Append ("SessionID="+_sessionID);
break;
}
return (sb.ToString());
}
public override void Send (byte[] data)
{
ThrowUtility.ThrowIfNull ("data", data);
lock (_lock)
{
if (_pollTimer.Enabled)
_pollTimer.Stop ();
HttpWebRequest request = (HttpWebRequest) HttpWebRequest.Create (GenerateURI ());
if (Configuration.Proxy.Section.GetBool (Configuration.Proxy.UseProxy.Name, Configuration.Proxy.UseProxy.Default))
{
string host = Configuration.Proxy.Section.GetString (Configuration.Proxy.HttpHost.Name, Configuration.Proxy.HttpHost.Default);
int port = Configuration.Proxy.Section.GetInt (Configuration.Proxy.HttpPort.Name, Configuration.Proxy.HttpPort.Default);
string username = Configuration.Proxy.Section.GetString (Configuration.Proxy.HttpUsername.Name, Configuration.Proxy.HttpUsername.Default);
string password = Configuration.Proxy.Section.GetString (Configuration.Proxy.HttpPassword.Name, Configuration.Proxy.HttpPassword.Default);
request.Proxy = new WebProxy (host, port);
request.Proxy.Credentials = new NetworkCredential (username, password);
}
request.Method = "POST";
request.Accept = "*/*";
request.AllowAutoRedirect = false;
request.AllowWriteStreamBuffering = false;
request.KeepAlive = true;
request.UserAgent = "MSMSGS";
request.ContentType = "application/x-msn-messenger";
request.ContentLength = data.Length;
request.Headers.Add ("Pragma", "no-cache");
Stream stream = request.GetRequestStream ();
stream.Write (data, 0, data.Length);
stream.Close ();
_sending = true;
request.BeginGetResponse(BeginGetResponseComplete, request);
}
}
private void BeginGetResponseComplete (IAsyncResult ar)
{
bool wasSending = false;
byte[] responseData = null;
int responseLength = 0;
lock (_lock)
{
if (ar != null)
{
HttpWebRequest request = (HttpWebRequest)ar.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(ar);
foreach (string str in response.Headers.AllKeys)
{
switch (str)
{
case "Content-Length":
responseLength = Int32.Parse(response.Headers.Get (str));
break;
case "X-MSN-Messenger":
string text = response.Headers.Get(str);
string[] parts = text.Split(';');
foreach (string part in parts)
{
string[] elements = part.Split('=');
switch (elements[0].Trim())
{
case "SessionID":
_sessionID = elements[1];
break;
case "GW-IP":
ConnectionInfo.HostName = elements[1];
break;
case "Session":
break;
case "Action":
break;
}
}
break;
}
}
responseData = new byte[responseLength];
int responseRead = 0;
Stream responseStream = response.GetResponseStream();
while (responseRead < responseLength)
{
byte[] buf = new byte[256];
int read = responseStream.Read (buf, 0, buf.Length);
Array.Copy(buf, 0, responseData, responseRead, read);
responseRead += read;
}
responseStream.Close();
response.Close();
wasSending = _sending;
_sending = false;
}
}
ThreadUtility.SyncDispatch (new VoidDelegate (delegate
{
if (wasSending)
OnSendComplete (new EventArgs ());
OnDataReceived (new ConnectionDataEventArgs (this, responseData, responseLength));
}));
lock (_lock)
{
if ((!_sending) && (!_pollTimer.Enabled))
_pollTimer.Start ();
}
}
private void PollForData (object sender, ElapsedEventArgs args)
{
Action = HTTPActions.Poll;
Send(new byte[0]);
}
}
}