private static void ReceiveCallback(IAsyncResult ar)
{
// Retrieve the state object and the client socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.workSocket;
// Read data from the remote device.
int bytesRead = client.EndReceive(ar);
if (bytesRead > 0)
{
var start = 0;
do
{
var pos = Array.IndexOf(state.buffer, (byte)0, start);
if (pos != -1 && pos < bytesRead)
{
//end separator, full payload availabled
state.sb.Append(Encoding.UTF8.GetString(state.buffer, start, pos - start));
string msg = state.sb.ToString();
state.sb = new StringBuilder();
//send message to UI deletage
if (Anchor.InvokeRequired)
{
var d = new ProcessMsgDelegate(ProcessMsg);
Anchor.Invoke(d, new object[] { msg });
}
else
{
ProcessMsg(msg);
}
start = pos + 1;
}
else
{
state.sb.Append(Encoding.UTF8.GetString(state.buffer, start, bytesRead - start));
break;
}
} while (true);
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
}
public override PushMsgResult PushMsg(ProcessMsgDelegate sink) => sink(ref m_inProgress);
public abstract PushMsgResult PushMsg(ProcessMsgDelegate sink);
