private void readCallback(IAsyncResult ar)
{
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
//Read data from the client socket.
int read_bytes = handler.EndReceive(ar);
// Data was read from the client socket.
if (read_bytes > 0)
{
DataBuilder databuilder = null;
List <DataBuilder> to_remove = new List <DataBuilder>();
//Check if it's in the queue
foreach (DataBuilder db in readqueue)
{
if (db == null)
{
to_remove.Add(db);
}
else
if (db.socket == handler)
{
databuilder = db;
}
}
foreach (DataBuilder db in to_remove)
{
readqueue.Remove(db);
}
//Variable that receives the buffer without tags
byte[] realContent;
if (databuilder == null)
{
realContent = new byte[read_bytes - MessageTags.tagLength];
//Get inicial tag
byte[] start = new byte[MessageTags.tagLength];
Array.Copy(state.buffer, start, MessageTags.tagLength);
DataType type;
if (start.SequenceEqual(MessageTags.bTextStartTag))
{
type = DataType.text;
}
else if (start.SequenceEqual(MessageTags.bImageStartTag))
{
type = DataType.image;
}
else
{
throw new Exception("Invalid data");
}
databuilder = new DataBuilder(handler, type);
readqueue.Add(databuilder);
//Remove inicial tag and zeros
Array.Copy(state.buffer, MessageTags.tagLength - 1, realContent, 0, read_bytes - MessageTags.tagLength);
}
else
{
realContent = new byte[read_bytes];
//Remove zeros
Array.Copy(state.buffer, 0, realContent, 0, read_bytes);
}
if (realContent.Length > 0)
{
byte[] end = new byte[MessageTags.tagLength];
Array.Copy(realContent, realContent.Length - MessageTags.tagLength, end, 0, MessageTags.tagLength);
//Check if it contains the end tag
if (end.SequenceEqual(MessageTags.bEndTag))
{
//Remove end tag
byte[] newcontent = new byte[realContent.Length - MessageTags.tagLength];
Array.Copy(realContent, 0, newcontent, 0, newcontent.Length);
realContent = newcontent;
databuilder.receivedAllData = true;
try
{
if (readqueue.Contains(databuilder))
{
readqueue.Remove(databuilder);
}
}
catch (Exception e)
{
Output.sendMsg("Server", MessageType.Error, "Exeption: " + e.ToString());
}
}
//Add realcontent to dadabuilder buffer
databuilder.addPackage(realContent);
}
Output.sendMsg("Server", MessageType.Process, "Received " + read_bytes + " bits from the client(" + handler.LocalEndPoint.ToString() + ")");
if (databuilder.receivedAllData)
{
Output.sendMsg("Server", MessageType.Process, "All data received from the client(" + handler.LocalEndPoint.ToString() + ")");
if (databuilder.datatype == DataType.text)
{
//Convert data to string
string message = Encoding.ASCII.GetString(databuilder.buffer);
Output.sendMsg("Server", MessageType.ContentMessage, "Received all text: " + message);
if (onreceivedata != null)
{
onreceivedata(message, databuilder.socket);
}
}
else if (databuilder.datatype == DataType.image)
{
Output.sendMsg("Server", MessageType.ContentMessage, "Received all Bitmap");
//Convert data to bitmap
Bitmap bitmap = ImageManager.byteToImage(databuilder.buffer);
if (onreceivebitmap != null)
{
onreceivebitmap(bitmap, databuilder.socket);
}
}
}
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(readCallback), state);
}
else
{
clients_connected.Remove(handler);
Output.sendMsg("Server", MessageType.Process, "Client disconnected(" + handler.LocalEndPoint.ToString() + ")");
if (onclientdisconnect != null)
{
onclientdisconnect(handler);
}
handler.Close();
}
}