/// <summary>
/// Runs when data is sent to the client
/// </summary>
/// <param name="asyncResult">Result containing the client info</param>
public void DataSentCallback(IAsyncResult asyncResult)
{
ClientInfo client = (ClientInfo)asyncResult.AsyncState;
try
{
if (_usingSsl)
{
client._clientSslStream.EndWrite(asyncResult);
Console.WriteLine($"DataSentCallbackSsl(): Successfully sent message to {client.GetUsername()}");
_semaphorePool.Release();
}
else
{
int result = client.ClientSocket().EndSend(asyncResult, out var errorCode);
Console.WriteLine(errorCode == SocketError.Success ?
$"Successfully sent message with size of {result} bytes to {client.GetUsername()}" :
$"Error sending. code: {errorCode}");
}
}
catch (Exception e)
{
Console.WriteLine("Unhandled DataSentCallback() Exception! " + e);
}
}
/// <summary>
/// Runs when data is received from a client. Parses the information and sends it off
/// to a method to handle the information.
/// </summary>
/// <param name="asyncResult">Result containing the client info</param>
public void DataReceivedCallback(IAsyncResult asyncResult)
{
ClientInfo client = (ClientInfo)asyncResult.AsyncState;
try
{
var readBytes = _usingSsl ? client._clientSslStream.EndRead(asyncResult) : client.ClientSocket().EndReceive(asyncResult);
client.ClientStringBuilder().Append(Encoding.ASCII.GetString(client.DataBuffer(), 0, readBytes));// Add on the new data
string currentData = client.ClientStringBuilder().ToString();
int position;
while ((position = currentData.IndexOf("<EOF>", StringComparison.Ordinal)) != -1)// Keep going until we don't have any more commands
{
string command = currentData.Substring(0, position);
Console.WriteLine($"<{client._username}> {command}");
currentData = currentData.Remove(0, position + 5); // Remove the command from the currentData string
HelperMethods.CommandHandler(command, client); // Handle the command
}
client.ClientStringBuilder().Clear(); // We used the data in the string builder so now we can clear it
client.ClientStringBuilder().Append(currentData); // There still might be some data left so we add it back in
client.BeginReceiveData(); // Continue receiving data
}
catch (ObjectDisposedException)
{
Console.WriteLine("DataReceivedCallback(): Socket was closed before finishing receive");
}
catch (SocketException se)
{
if (se.ErrorCode == 10054)// Connection reset by peer.
{
Console.WriteLine($"DataReceivedCallback(): Client went offline");
}
else
{
Console.WriteLine($"DataReceivedCallback(): {se.Message} Error Code: {se.ErrorCode}");
}
HelperMethods.RemoveClientFromAll(client);
}
catch (IOException ioe)
{
if (ioe.InnerException is SocketException se)
{
if (se.ErrorCode == 10054)// Connection reset by peer.
{
Console.WriteLine($"DataReceivedCallback(): Client went offline");
}
}
else
{
Console.WriteLine($"DataReceivedCallback(): {ioe.Message}");
}
HelperMethods.RemoveClientFromAll(client);
}
catch (Exception e)
{
Console.WriteLine($"DataReceivedCallbackSsl(): {e.Message}");
if (e.InnerException != null)
{
Console.WriteLine($"DataReceivedCallbackSsl(): {e.InnerException}");
}
HelperMethods.RemoveClientFromAll(client);
}
}