protected override int ProcessIncoming(NetContext context, Connection connection, Stream incoming)
{
if (incoming.Length < 2)
{
return(0); // can't read that; frame takes at minimum two bytes
}
byte[] buffer = null;
try
{
buffer = context.GetBuffer();
int read;
// read as much as possible up to 14 bytes; that gives us space for 2 bytes frame header, 8 bytes length, and 4 bytes mask
read = NetContext.TryFill(incoming, buffer, 14);
int headerLength;
var frame = WebSocketsFrame.TryParseFrameHeader(buffer, read, out headerLength);
if (frame == null)
{
return(0);
}
int payloadLen = frame.PayloadLength;
#if VERBOSE
Debug.WriteLine("Parsed header from: " + BitConverter.ToString(buffer, 0, headerLength));
#endif
if (incoming.Length < headerLength + payloadLen)
{
return(0); // not enough data to read the payload
}
if (payloadLen != 0)
{
Stream payload = null;
try
{
payload = new BufferStream(context, context.Handler.MaxIncomingQuota);
if (read != headerLength)
{
incoming.Position -= (read - headerLength); // we got it wrong...
}
Copy(incoming, payload, buffer, frame.Mask, payloadLen);
if (payloadLen != payload.Length)
{
throw new InvalidOperationException("I munged the data");
}
frame.Payload = payload;
payload = null;
}
finally
{
if (payload != null)
{
payload.Dispose();
}
}
}
foreach (var final in ApplyExtensions(context, connection, frame, true))
{
ProcessFrame(context, connection, final);
}
return(headerLength + payloadLen);
}
finally
{
context.Recycle(buffer);
}
}