public static 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 handler = listener.EndAccept(ar);
// Create the state object.
SocketInterfaceStateObject state = new SocketInterfaceStateObject();
state.workSocket = handler;
Console.WriteLine("Received Connection from {0}", handler.RemoteEndPoint);
handler.BeginReceive(
state.buffer,
0,
SocketInterfaceStateObject.BufferSize,
0,
new AsyncCallback(ReadCallback),
state);
}
public static 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 handler = listener.EndAccept(ar);
// Create the state object.
SocketInterfaceStateObject state = new SocketInterfaceStateObject();
state.workSocket = handler;
Console.WriteLine("Received Connection from {0}", handler.RemoteEndPoint);
handler.BeginReceive(
state.buffer,
0,
SocketInterfaceStateObject.BufferSize,
0,
new AsyncCallback(ReadCallback),
state);
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
// Retrieve the state object and the handler socket
// from the asynchronous state object.
SocketInterfaceStateObject state = (SocketInterfaceStateObject)ar.AsyncState;
Socket handler = state.workSocket;
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
// Check for end-of-file tag. If it is not there, read more data.
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
{
// Clear the string builder from state object
state.sb.Length = 0;
// All the command data has been read from the client.
// Display it on the console.
//Console.WriteLine("Read {0} bytes from socket. \n Data : {1}",
// content.Length, content );
content = content.Remove(content.IndexOf("<EOF>"));
if (content.StartsWith("READ|"))
{
content = content.Replace("READ|", "");
string response = content + "=" + ReadFromDataBase(content);
//string response = ReadRandom();
// Send tag value to the client
Send(handler, response);
}
else if (content.StartsWith("WRITE|"))
{
content = content.Replace("WRITE|", "");
string[] array = content.Split('|');
if (array.Length > 1)
{
string tagname = array[0];
string tagvalue = array[1];
WriteToDataSource(tagname, tagvalue);
}
}
else
{
log.Error("Unkown command received: " + content);
}
}
// Continue to listen for commands
handler.BeginReceive(
state.buffer,
0,
SocketInterfaceStateObject.BufferSize,
0,
new AsyncCallback(ReadCallback),
state);
}
}
