/// <summary>
/// Resolve <see cref="ProcessingContext.ServerEndPoint" /> based on <see cref="ProcessingContext.RequestHeader" />,
/// establish connection to destination server and open <see cref="ProcessingContext.ServerStream" />.
/// <see cref="ProcessingContext.RequestHeader" /> should be defined.
/// </summary>
/// <param name="context">current request context</param>
protected virtual void ConnectToServer(ProcessingContext context)
{
Contract.Requires <ArgumentNullException>(context != null, "context");
Contract.Requires <InvalidContextException>(context.RequestHeader != null, "RequestHeader");
context.ServerEndPoint = DnsUtils.ResolveRequestEndpoint(context.RequestHeader, _defaultPort);
context.ServerSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
{
ReceiveTimeout = (Int32)ServerReadTimeout.TotalMilliseconds,
SendTimeout = (Int32)ServerWriteTimeout.TotalMilliseconds
};
context.ServerSocket.Connect(context.ServerEndPoint.Host, context.ServerEndPoint.Port);
context.ServerStream = new NetworkStream(context.ServerSocket, true);
if (Logger.IsDebugEnabled)
{
Logger.DebugFormat("Connection Established: {0}:{1}",
context.ServerEndPoint.Host,
context.ServerEndPoint.Port
);
}
}
/// <summary>
/// Resolve <see cref="ProcessingContext.ServerEndPoint" /> based on <see cref="ProcessingContext.RequestHeader" />,
/// establish connection to destination server and open <see cref="ProcessingContext.ServerStream" />.
/// <see cref="ProcessingContext.RequestHeader" /> should be defined.
/// </summary>
/// <param name="context">current request context</param>
protected virtual void ConnectToServer(ProcessingContext context)
{
ContractUtils.Requires <ArgumentNullException>(context != null, "context");
ContractUtils.Requires <InvalidContextException>(context.RequestHeader != null, "RequestHeader");
context.ServerEndPoint = DnsUtils.ResolveRequestEndpoint(context.RequestHeader, _defaultPort);
bool requiresNewSocket = true;
if (EnableKeepAlive && activeSockets.ContainsKey(context.ServerEndPoint))
{
context.ServerSocket = activeSockets[context.ServerEndPoint];
if (context.ServerSocket.IsConnected())
{
requiresNewSocket = false;
}
else
{
context.ServerSocket.Close();
activeSockets.Remove(context.ServerEndPoint);
OnLog(LogLevel.Debug, "Server socket appears disconnected. Requiring new socket.");
}
}
if (requiresNewSocket)
{
context.ServerSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)
{
ReceiveTimeout = (int)ServerReadTimeout.TotalMilliseconds,
SendTimeout = (int)ServerWriteTimeout.TotalMilliseconds
};
context.ServerSocket.Connect(context.ServerEndPoint.Host, context.ServerEndPoint.Port);
if (EnableKeepAlive)
{
activeSockets[context.ServerEndPoint] = context.ServerSocket;
}
}
context.ServerStream = new NetworkStream(context.ServerSocket, !EnableKeepAlive);
OnLog(LogLevel.Debug,
"Connection Established: {0}:{1}",
context.ServerEndPoint.Host,
context.ServerEndPoint.Port
);
}