internal async Task <bool> SendContinuationAsync(int streamId, Http2ContinuationFrameFlags flags, IEnumerator <KeyValuePair <string, string> > headersEnumerator)
{
var outputWriter = _pair.Application.Output;
var frame = new Http2Frame();
frame.PrepareContinuation(flags, streamId);
var buffer = _headerEncodingBuffer.AsMemory();
var done = HPackHeaderWriter.ContinueEncodeHeaders(headersEnumerator, buffer.Span, out var length);
frame.PayloadLength = length;
WriteHeader(frame, outputWriter);
await SendAsync(buffer.Span.Slice(0, length));
return(done);
}
public Task StartStreamAsync(int streamId, IEnumerable <KeyValuePair <string, string> > headers, bool endStream)
{
var writableBuffer = _pair.Application.Output;
var tcs = new TaskCompletionSource <object>(TaskCreationOptions.RunContinuationsAsynchronously);
var frame = new Http2Frame();
frame.PrepareHeaders(Http2HeadersFrameFlags.NONE, streamId);
var buffer = _headerEncodingBuffer.AsSpan();
var headersEnumerator = GetHeadersEnumerator(headers);
var done = HPackHeaderWriter.BeginEncodeHeaders(headersEnumerator, buffer, out var length);
frame.PayloadLength = length;
if (done)
{
frame.HeadersFlags = Http2HeadersFrameFlags.END_HEADERS;
}
if (endStream)
{
frame.HeadersFlags |= Http2HeadersFrameFlags.END_STREAM;
}
WriteHeader(frame, writableBuffer);
writableBuffer.Write(buffer.Slice(0, length));
while (!done)
{
frame.PrepareContinuation(Http2ContinuationFrameFlags.NONE, streamId);
done = HPackHeaderWriter.ContinueEncodeHeaders(headersEnumerator, buffer, out length);
frame.PayloadLength = length;
if (done)
{
frame.ContinuationFlags = Http2ContinuationFrameFlags.END_HEADERS;
}
WriteHeader(frame, writableBuffer);
writableBuffer.Write(buffer.Slice(0, length));
}
return(FlushAsync(writableBuffer));
}