private void HandlePriority(PriorityFrame priorityFrame, out Http2Stream stream)
{
//09 -> 6.3. PRIORITY
//The PRIORITY frame is associated with an existing stream. If a
//PRIORITY frame is received with a stream identifier of 0x0, the
//recipient MUST respond with a connection error (Section 5.4.1) of
//type PROTOCOL_ERROR [PROTOCOL_ERROR].
if (priorityFrame.StreamId == 0)
{
throw new ProtocolError(ResetStatusCode.ProtocolError, "Incoming priority frame with id = 0");
}
Http2Logger.LogDebug("Priority frame. StreamId: {0} Priority: {1}", priorityFrame.StreamId,
priorityFrame.Priority);
stream = GetStream(priorityFrame.StreamId);
if (!_usePriorities)
return;
//09 -> 5.1. Stream States
//A receiver can ignore WINDOW_UPDATE [WINDOW_UPDATE] or PRIORITY
//[PRIORITY] frames in this state.
if (stream != null && !stream.EndStreamReceived)
{
stream.Priority = priorityFrame.Priority;
}
//09 -> 5.1. Stream States
//WINDOW_UPDATE, PRIORITY, or RST_STREAM frames can be received in
//this state for a short period after a DATA or HEADERS frame
//containing an END_STREAM flag is sent. Until the remote peer
//receives and processes the frame bearing the END_STREAM flag, it
//might send frame of any of these types. Endpoints MUST ignore
//WINDOW_UPDATE, PRIORITY, or RST_STREAM frames received in this
//state, though endpoints MAY choose to treat frames that arrive a
//significant time after sending END_STREAM as a connection error
//(Section 5.4.1) of type PROTOCOL_ERROR.
}
private void HandlePriority(PriorityFrame priorityFrame, out Http2Stream stream)
{
//spec 06:
//The PRIORITY frame is associated with an existing stream. If a
//PRIORITY frame is received with a stream identifier of 0x0, the
//recipient MUST respond with a connection error (Section 5.4.1) of
//type PROTOCOL_ERROR [PROTOCOL_ERROR].
if (priorityFrame.StreamId == 0)
{
throw new ProtocolError(ResetStatusCode.ProtocolError, "Incoming priority frame with id = 0");
}
Http2Logger.LogDebug("Priority frame. StreamId: {0} Priority: {1}", priorityFrame.StreamId,
priorityFrame.Priority);
stream = GetStream(priorityFrame.StreamId);
if (!_usePriorities)
return;
//06
//A receiver can ignore WINDOW_UPDATE [WINDOW_UPDATE] or PRIORITY
//[PRIORITY] frames in this state.
if (stream != null && !stream.EndStreamReceived)
{
stream.Priority = priorityFrame.Priority;
}
//Do not signal an error because (06)
//WINDOW_UPDATE [WINDOW_UPDATE], PRIORITY [PRIORITY], or RST_STREAM
//[RST_STREAM] frames can be received in this state for a short
//period after a frame containing an END_STREAM flag is sent.
}
private void HandlePriority(PriorityFrame priorityFrame, out Http2Stream stream)
{
Http2Logger.LogDebug("PRIORITY frame: stream id={0}, exclusive={1}, dependency={2}, weight={3}",
priorityFrame.StreamId, priorityFrame.Exclusive, priorityFrame.StreamDependency,
priorityFrame.Weight);
/* 12 -> 6.3
The PRIORITY frame is associated with an existing stream. If a
PRIORITY frame is received with a stream identifier of 0x0, the
recipient MUST respond with a connection error of type PROTOCOL_ERROR. */
if (priorityFrame.StreamId == 0)
throw new ProtocolError(ResetStatusCode.ProtocolError, "Incoming priority frame with stream id=0");
stream = GetStream(priorityFrame.StreamId);
/* 12 -> 6.3
The PRIORITY frame can be sent on a stream in any of the "reserved
(remote)", "open", "half-closed (local)", or "half closed (remote)"
states, though it cannot be sent between consecutive frames that
comprise a single header block. */
if (stream.Closed)
throw new Http2StreamNotFoundException(priorityFrame.StreamId);
if (!(stream.Opened || stream.ReservedRemote || stream.HalfClosedLocal))
throw new ProtocolError(ResetStatusCode.ProtocolError, "priority for non opened or reserved stream");
if (!_usePriorities)
return;
stream.Priority = priorityFrame.Weight;
}