static void HandleCloseMessage(Config config, byte[] buffer, int msgOffset, int payloadLength)
{
(Connection conn, int _, bool expectMask, ConcurrentQueue <Message> _, BufferPool _) = config;
if (expectMask)
{
int maskOffset = msgOffset - Constants.MaskSize;
MessageProcessor.ToggleMask(buffer, msgOffset, payloadLength, buffer, maskOffset);
}
// dump after mask off
Log.DumpBuffer($"Message", buffer, msgOffset, payloadLength);
Log.Info($"Close: {GetCloseCode(buffer, msgOffset)} message:{GetCloseMessage(buffer, msgOffset, payloadLength)}");
conn.Dispose();
}
static ArrayBuffer CopyMessageToBuffer(BufferPool bufferPool, bool expectMask, byte[] buffer, int msgOffset, int payloadLength)
{
ArrayBuffer arrayBuffer = bufferPool.Take(payloadLength);
if (expectMask)
{
int maskOffset = msgOffset - Constants.MaskSize;
// write the result of toggle directly into arrayBuffer to avoid 2nd copy call
MessageProcessor.ToggleMask(buffer, msgOffset, arrayBuffer, payloadLength, buffer, maskOffset);
}
else
{
arrayBuffer.CopyFrom(buffer, msgOffset, payloadLength);
}
return(arrayBuffer);
}
static Header ReadHeader(Config config, byte[] buffer, bool opCodeContinuation = false)
{
(Connection conn, int maxMessageSize, bool expectMask, ConcurrentQueue <Message> queue, BufferPool bufferPool) = config;
Stream stream = conn.stream;
var header = new Header();
// read 2
header.offset = ReadHelper.Read(stream, buffer, header.offset, Constants.HeaderMinSize);
// log after first blocking call
Log.Verbose($"Message From {conn}");
if (MessageProcessor.NeedToReadShortLength(buffer))
{
header.offset = ReadHelper.Read(stream, buffer, header.offset, Constants.ShortLength);
}
if (MessageProcessor.NeedToReadLongLength(buffer))
{
header.offset = ReadHelper.Read(stream, buffer, header.offset, Constants.LongLength);
}
Log.DumpBuffer($"Raw Header", buffer, 0, header.offset);
MessageProcessor.ValidateHeader(buffer, maxMessageSize, expectMask, opCodeContinuation);
if (expectMask)
{
header.offset = ReadHelper.Read(stream, buffer, header.offset, Constants.MaskSize);
}
header.opcode = MessageProcessor.GetOpcode(buffer);
header.payloadLength = MessageProcessor.GetPayloadLength(buffer);
header.finished = MessageProcessor.Finished(buffer);
Log.Verbose($"Header ln:{header.payloadLength} op:{header.opcode} mask:{expectMask}");
return(header);
}
/// <returns>new offset in buffer</returns>
static int SendMessage(byte[] buffer, int startOffset, ArrayBuffer msg, bool setMask, MaskHelper maskHelper)
{
int msgLength = msg.count;
int offset = WriteHeader(buffer, startOffset, msgLength, setMask);
if (setMask)
{
offset = maskHelper.WriteMask(buffer, offset);
}
msg.CopyTo(buffer, offset);
offset += msgLength;
// dump before mask on
Log.DumpBuffer("Send", buffer, startOffset, offset);
if (setMask)
{
int messageOffset = offset - msgLength;
MessageProcessor.ToggleMask(buffer, messageOffset, msgLength, buffer, messageOffset - Constants.MaskSize);
}
return(offset);
}
static void ReadOneMessage(Config config, byte[] buffer)
{
(Connection conn, int maxMessageSize, bool expectMask, ConcurrentQueue <Message> queue, BufferPool bufferPool) = config;
Stream stream = conn.stream;
Header header = ReadHeader(config, buffer);
int msgOffset = header.offset;
header.offset = ReadHelper.Read(stream, buffer, header.offset, header.payloadLength);
if (header.finished)
{
switch (header.opcode)
{
case 2:
HandleArrayMessage(config, buffer, msgOffset, header.payloadLength);
break;
case 8:
HandleCloseMessage(config, buffer, msgOffset, header.payloadLength);
break;
}
}
else
{
// todo cache this to avoid allocations
var fragments = new Queue <ArrayBuffer>();
fragments.Enqueue(CopyMessageToBuffer(bufferPool, expectMask, buffer, msgOffset, header.payloadLength));
int totalSize = header.payloadLength;
while (!header.finished)
{
header = ReadHeader(config, buffer, opCodeContinuation: true);
msgOffset = header.offset;
header.offset = ReadHelper.Read(stream, buffer, header.offset, header.payloadLength);
fragments.Enqueue(CopyMessageToBuffer(bufferPool, expectMask, buffer, msgOffset, header.payloadLength));
totalSize += header.payloadLength;
MessageProcessor.ThrowIfMsgLengthTooLong(totalSize, maxMessageSize);
}
ArrayBuffer msg = bufferPool.Take(totalSize);
msg.count = 0;
while (fragments.Count > 0)
{
ArrayBuffer part = fragments.Dequeue();
part.CopyTo(msg.array, msg.count);
msg.count += part.count;
part.Release();
}
// dump after mask off
Log.DumpBuffer($"Message", msg);
queue.Enqueue(new Message(conn.connId, msg));
}
}
