Пример #1
0
        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*/);
        }