public static async Task AssertWindowUpdate(
this IReadableByteStream stream,
uint expectedStreamId,
int increment)
{
var header = await stream.ReadFrameHeaderWithTimeout();
Assert.Equal(FrameType.WindowUpdate, header.Type);
Assert.Equal(WindowUpdateData.Size, header.Length);
Assert.Equal(0, header.Flags);
Assert.Equal(expectedStreamId, header.StreamId);
var buf = new byte[WindowUpdateData.Size];
await stream.ReadAllWithTimeout(new ArraySegment <byte>(buf));
var wu = WindowUpdateData.DecodeFrom(new ArraySegment <byte>(buf));
Assert.Equal(increment, wu.WindowSizeIncrement);
}
private async ValueTask <Http2Error?> HandleWindowUpdateFrame(FrameHeader fh)
{
if (fh.Length != WindowUpdateData.Size)
{
return(new Http2Error
{
StreamId = 0,
Code = ErrorCode.FrameSizeError,
Message = "收到无效的窗口更新帧头",
});
}
await inputStream.ReadAll(
new ArraySegment <byte>(receiveBuffer, 0, WindowUpdateData.Size));
var windowUpdateData = WindowUpdateData.DecodeFrom(
new ArraySegment <byte>(receiveBuffer, 0, WindowUpdateData.Size));
bool isIdleStream = false;
lock (shared.Mutex)
{
isIdleStream = IsIdleStreamId(
fh.StreamId, shared.LastOutgoingStreamId, shared.LastIncomingStreamId);
}
if (isIdleStream)
{
return(new Http2Error
{
StreamId = 0u,
Code = ErrorCode.ProtocolError,
Message = "接收到空闲流的窗口更新",
});
}
return(writer.UpdateFlowControlWindow(
fh.StreamId, windowUpdateData.WindowSizeIncrement));
}