private void Verify(WebSocketContext Context, Action <EngineIOException> Callback)
{
EngineIOException Return = null;
bool AllowWebSocket = false;
try
{
if ((Return = Verify(Context.QueryString, Context.Headers, EngineIOTransportType.websocket)) == null)
{
string SID = EngineIOHttpManager.GetSID(Context.QueryString);
bool Contains = _Clients.ContainsKey(SID);
if (!string.IsNullOrEmpty(SID))
{
if (Contains && _Clients.TryGetValue(SID, out EngineIOSocket Socket))
{
if (Socket.Transport is EngineIOPolling && Option.AllowUpgrade && Option.WebSocket && !(Socket.Upgrading || Socket.Upgraded))
{
if (!(Socket.Upgrading || Socket.Upgraded))
{
Socket.UpgradeTransport(new EngineIOWebSocket(Context));
AllowWebSocket = true;
}
else
{
Return = Exceptions.BAD_REQUEST;
}
}
else
{
Return = Exceptions.BAD_REQUEST;
}
}
else
{
Return = Exceptions.UNKNOWN_SID;
}
}
else
{
if (Option.AllowWebSocket != null)
{
AllowWebSocket = true;
Option.AllowWebSocket(Context, Callback);
}
}
}
}
catch (Exception Exception)
{
EngineIOLogger.Error(this, Return = new EngineIOException("Unknown exception", Exception));
}
finally
{
if (!AllowWebSocket)
{
Callback(Return);
}
}
}
private void Verify(HttpListenerRequest Request, Action <EngineIOException> Callback)
{
EngineIOException Return = null;
bool AllowHttpRequest = false;
try
{
if ((Return = Verify(Request.QueryString, Request.Headers, EngineIOTransportType.polling)) == null)
{
string SID = EngineIOHttpManager.GetSID(Request.QueryString);
bool Contains = _Clients.ContainsKey(SID);
if (string.IsNullOrEmpty(SID) || Contains)
{
if (Contains && !(_Clients[SID].Transport is EngineIOPolling))
{
Return = Exceptions.BAD_REQUEST;
}
else if (EngineIOHttpManager.ParseMethod(Request.HttpMethod) == EngineIOHttpMethod.GET)
{
if (Option.AllowHttpRequest != null)
{
AllowHttpRequest = true;
Option.AllowHttpRequest(Request, Callback);
}
}
else if (string.IsNullOrEmpty(SID))
{
Return = Exceptions.BAD_HANDSHAKE_METHOD;
}
}
else
{
Return = Exceptions.UNKNOWN_SID;
}
}
}
catch (Exception Exception)
{
EngineIOLogger.Error(this, Return = new EngineIOException("Unknown exception", Exception));
}
finally
{
if (!AllowHttpRequest)
{
Callback(Return);
}
}
}
private void OnHttpRequest(object sender, HttpRequestEventArgs e)
{
Verify(e.Request, (Exception) =>
{
if (Exception == null)
{
string SID = EngineIOHttpManager.GetSID(e.Request.QueryString);
if (_Clients.TryGetValue(SID, out EngineIOSocket Client))
{
Client.Transport.OnRequest(e.Request, e.Response);
}
else
{
Handshake(EngineIOHttpManager.GetTransport(e.Request.QueryString), e.Request, e.Response);
}
}
else
{
EngineIOHttpManager.SendErrorMessage(e.Request, e.Response, Exception);
}
});
}