private static async Task sendHeader(Http2Settings settings, Http2FrameHeader frameHeader, byte[] frameHeaderBuffer, RequestResponseBase rr, bool endStream, Stream output, bool pushPromise)
{
var encoder = new Encoder(settings.HeaderTableSize);
var ms = new MemoryStream();
var writer = new BinaryWriter(ms);
if (rr.Priority.HasValue)
{
long p = rr.Priority.Value;
writer.Write((byte)((p >> 32) & 0xff));
writer.Write((byte)((p >> 24) & 0xff));
writer.Write((byte)((p >> 16) & 0xff));
writer.Write((byte)((p >> 8) & 0xff));
writer.Write((byte)(p & 0xff));
}
if (rr is Request request)
{
var uri = request.RequestUri;
encoder.EncodeHeader(writer, StaticTable.KnownHeaderMethod, request.Method.GetByteString());
encoder.EncodeHeader(writer, StaticTable.KnownHeaderAuhtority, uri.Authority.GetByteString());
encoder.EncodeHeader(writer, StaticTable.KnownHeaderScheme, uri.Scheme.GetByteString());
encoder.EncodeHeader(writer, StaticTable.KnownHeaderPath, request.Url.GetByteString(), false,
HpackUtil.IndexType.None, false);
}
else
{
var response = (Response)rr;
encoder.EncodeHeader(writer, StaticTable.KnownHeaderStatus, response.StatusCode.ToString().GetByteString());
}
foreach (var header in rr.Headers)
{
encoder.EncodeHeader(writer, header.NameData, header.ValueData);
}
var data = ms.ToArray();
int newLength = data.Length;
frameHeader.Length = newLength;
frameHeader.Type = pushPromise ? Http2FrameType.PushPromise : Http2FrameType.Headers;
var flags = Http2FrameFlag.EndHeaders;
if (endStream)
{
flags |= Http2FrameFlag.EndStream;
}
if (rr.Priority.HasValue)
{
flags |= Http2FrameFlag.Priority;
}
frameHeader.Flags = flags;
// clear the padding flag
//headerBuffer[4] = (byte)(flags & ~((int)Http2FrameFlag.Padded));
// send the header
frameHeader.CopyToBuffer(frameHeaderBuffer);
await output.WriteAsync(frameHeaderBuffer, 0, frameHeaderBuffer.Length /*, cancellationToken*/);
await output.WriteAsync(data, 0, data.Length /*, cancellationToken*/);
}