// Sending a Payload from server to client expecting an answer, server initiated the request
public NewPayLoad SendPayLoad(Guid sessionID, NewPayLoad pL)
{
GingerSocketInfo c = (from x in Clients where x.SessionID == sessionID select x).SingleOrDefault();
if (c == null)
{
throw new InvalidOperationException("SendPayLoad, SessionId not found: " + sessionID);
}
pL.PaylodType = NewPayLoad.ePaylodType.RequestPayload;
return(c.SendRequest(pL));
}
// Internal socket communication is handled here
private void SocketRequestHandler(GingerSocketInfo gingerSocketInfo)
{
NewPayLoad Req = gingerSocketInfo.DataAsPayload;
if (Req.Name == "GetSession")
{
gingerSocketInfo.Response = new NewPayLoad("SessionID", SessionID);
gingerSocketInfo.Response.PaylodType = NewPayLoad.ePaylodType.SocketResponse;
return;
}
throw new Exception("SocketRequestHandler - Unknown Request: " + Req.Name);
}
public void Connect(string IP, int port)
{
try
{
//Local host
IPAddress ipAddress = IPAddress.Parse(IP);
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
Socket socket = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
// Connect to Ginger Server async
socket.BeginConnect(remoteEP, new AsyncCallback(ConnectCallback), socket);
mConnectDone.WaitOne();
//start waiting for incoming data async - non blocking
// Create the state object.
mGingerSocketInfo = new GingerSocketInfo();
mGingerSocketInfo.Socket = socket;
mGingerSocketInfo.MessageHandler = MessageHandler;
mGingerSocketInfo.Receive();
// Now Ginger client is ready for incoming data
mConnected = true;
// if there is code here it will run - no wait
//TODO: handshake: version, security, encryption
NewPayLoad HandShake1 = new NewPayLoad("GetSession", "v1");
HandShake1.PaylodType = NewPayLoad.ePaylodType.SocketRequest;
NewPayLoad RC = SendSocketPayLoad(HandShake1);
if (RC.Name == "SessionID")
{
mGingerSocketInfo.SessionID = RC.GetGuid();
}
else
{
throw new Exception("Error in connecting to GingerSocketServer invalid Session");
}
}
catch (Exception e)
{
Console.WriteLine("Error: " + e.Message);
throw e;
}
}
// New incoming Ginger Client
public void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
allDone.Set();
// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket socket = listener.EndAccept(ar);
// Create the state object - one per Ginger client
GingerSocketInfo gingerSocketInfo = new GingerSocketInfo();
gingerSocketInfo.Socket = socket;
gingerSocketInfo.SessionID = Guid.NewGuid(); // Create new session id
gingerSocketInfo.MessageHandler = MessageHandler;
gingerSocketInfo.Receive();
Clients.Add(gingerSocketInfo);
}
// Internal socket communication is handled here
private void SocketRequestHandler(GingerSocketInfo gingerSocketInfo)
{
NewPayLoad Req = gingerSocketInfo.DataAsPayload;
if (Req.Name == "GetSession")
{
gingerSocketInfo.Response = new NewPayLoad("SessionID", SessionID);
gingerSocketInfo.Response.PaylodType = NewPayLoad.ePaylodType.SocketResponse;
return;
}
if (Req.Name == "NodeClosing")
{
gingerSocketInfo.Response = new NewPayLoad("OK", "Bye");
gingerSocketInfo.Response.PaylodType = NewPayLoad.ePaylodType.SocketResponse;
// TODO: close...
return;
}
throw new InvalidOperationException("SocketRequestHandler - Unknown Request: " + Req.Name);
}
private void MessageHandler(GingerSocketInfo obj)
{
//TODO: handle request from server
throw new NotImplementedException();
}
// Each time new data arrive we get callback
private void ReceiveCallback(IAsyncResult ar)
{
Console.WriteLine("ReceiveCallback");
while (mProcessingStatus == eProcessingStatus.SendingRequest)
{
Thread.Sleep(1);
}
try
{
// Retrieve the state object and the socket
// from the asynchronous state object.
GingerSocketInfo gingerSocketInfo = (GingerSocketInfo)ar.AsyncState;
Socket socket = gingerSocketInfo.Socket;
// Read data from the socket
int bytesRead = socket.EndReceive(ar);
BytesIn += bytesRead;
if (bytesRead > 0)
{
if (gingerSocketInfo.BufferPOS == 0) // do only once per Payload
{
//TODO: There might be more data, so store the data received so far - need to veruf completion, create TC !!
byte[] rcvLenBytesBB = gingerSocketInfo.buffer; // TODO: !!!!!!!!!!!!!temp do work direct - avoid creating a new byte array
PayloadLen = ((rcvLenBytesBB[0]) << 24) + (rcvLenBytesBB[1] << 16) + (rcvLenBytesBB[2] << 8) + rcvLenBytesBB[3];
if (PayloadLen > gingerSocketInfo.buffer.Length)
{
Array.Resize(ref gingerSocketInfo.buffer, PayloadLen + 4); // Make sure we will have enough space // Add 1024 !!!
// TODO: check if buffer is more than x size release it back....
}
}
gingerSocketInfo.BufferPOS += bytesRead;
if (gingerSocketInfo.BufferPOS == PayloadLen + 4)
{
NewPayLoad Resp = new NewPayLoad(gingerSocketInfo.buffer, true);
// We got the full packet, convert to Payload and process
if (Resp.PaylodType == NewPayLoad.ePaylodType.ResponsePayload || Resp.PaylodType == NewPayLoad.ePaylodType.SocketResponse)
{
mProcessingStatus = eProcessingStatus.ResponseStarted;
// Create new Payload from the buffer, ignoring the extra space at the end
Response = new NewPayLoad(gingerSocketInfo.buffer, true);
mProcessingStatus = eProcessingStatus.ResponseCompleted;
// we are done with pair of Req/Resp - good job - mission completed
// signal receive is complete so ready for processing
mRequestProcessingDone.Set(); // !!!
}
else // this is new request, we need to process and respond
{
IncomingRequetsesCounter++;
mProcessingStatus = eProcessingStatus.ProcessingRequest;
// This is a request need to respond
switch (Resp.PaylodType)
{
case NewPayLoad.ePaylodType.RequestPayload:
MessageHandler(gingerSocketInfo);
gingerSocketInfo.Response.PaylodType = NewPayLoad.ePaylodType.ResponsePayload;
break;
case NewPayLoad.ePaylodType.SocketRequest:
SocketRequestHandler(gingerSocketInfo);
break;
default:
throw new Exception("Unknown Payload Type, Payload.Name: " + Resp.Name);
}
mProcessingStatus = eProcessingStatus.SendingResponse;
byte[] bb = gingerSocketInfo.Response.GetPackage();
bytesOut += bb.Length;
mSocket.BeginSend(bb, 0, bb.Length, SocketFlags.None, SendCallback, this);
mSendDone.WaitOne();
}
gingerSocketInfo.BufferPOS = 0;
// be ready to accept more new request or incoming data
socket.BeginReceive(gingerSocketInfo.buffer, 0, gingerSocketInfo.buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallback), gingerSocketInfo);
mProcessingStatus = eProcessingStatus.Ready;
}
else
{
// we got a big package more than 1024, starting collecting the bytes until all received
socket.BeginReceive(gingerSocketInfo.buffer, gingerSocketInfo.BufferPOS, gingerSocketInfo.buffer.Length - gingerSocketInfo.BufferPOS, SocketFlags.None, new AsyncCallback(ReceiveCallback), gingerSocketInfo);
}
}
else
{
// All the data has arrived; put it in response.
// ????????????????????????????????????????????????????????????????????
// Signal that all bytes have been received.
mRequestProcessingDone.Set(); //move up like server ???
}
}
catch (SocketException e)
{
if (e.SocketErrorCode == SocketError.ConnectionReset)
{
Console.WriteLine("SocketException: " + e.Message);
//TODO: raise event
// other side closed connection - mark socket as dead TODO !!!!!!!!!!!!!!!!!!!!!!!
return;
}
throw e;
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// Connect to Services Grid
/// Retry mechanism will retry every 5 seconds up to total 30 seconds
/// </summary>
/// <param name="IP"></param>
/// <param name="port"></param>
public void Connect(string IP, int port)
{
try
{
//Local host
IPAddress ipAddress = IPAddress.Parse(IP);
IPEndPoint remoteIP = new IPEndPoint(ipAddress, port);
Socket socket = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
Console.WriteLine("Connecting to: " + remoteIP + ":" + port);
// Connect to Ginger Server async, retry max 30 seconds
Stopwatch stopwatch = Stopwatch.StartNew();
int retrycount = 0;
while (!socket.Connected && stopwatch.ElapsedMilliseconds < 30000)
{
socket.BeginConnect(remoteIP, new AsyncCallback(ConnectCallback), socket);
mConnectDone.WaitOne();
if (!socket.Connected)
{
retrycount++;
Console.WriteLine("Connect retry #" + retrycount);
Thread.Sleep(5000);
}
}
if (socket.Connected)
{
// Now Ginger client is ready for incoming data
mConnected = true;
}
else
{
Console.WriteLine("Failed to connect, exiting");
mConnected = false;
return;
}
//start waiting for incoming data async - non blocking
// Create the state object.
mGingerSocketInfo = new GingerSocketInfo();
mGingerSocketInfo.Socket = socket;
mGingerSocketInfo.MessageHandler = MessageHandler;
mGingerSocketInfo.Receive(); // not blocking
// if there is code here it will run - no wait
//TODO: handshake: version, security, encryption
NewPayLoad HandShake1 = new NewPayLoad("GetSession", "v1");
HandShake1.PaylodType = NewPayLoad.ePaylodType.SocketRequest;
NewPayLoad RC = SendSocketPayLoad(HandShake1);
if (RC.Name == "SessionID")
{
mGingerSocketInfo.SessionID = RC.GetGuid();
}
else
{
throw new Exception("Error in connecting to GingerSocketServer invalid Session");
}
}
catch (Exception e)
{
Console.WriteLine("Error: " + e.Message);
throw e;
}
}
private void MessageHandler(GingerSocketInfo gingerSocketInfo)
{
NewPayLoad PLRC = HandlePayLoad(gingerSocketInfo.DataAsPayload);
gingerSocketInfo.Response = PLRC;
}