public async Task ActAsServerAsync(Socket clientSocket)
{
var channel = new SocketChannel();
channel.Assign(clientSocket);
_encodingContext = new EncodingContext(channel);
_decodingContext = new DecodingContext(_channel);
_encoder = new FrameEncoder(_encodingContext);
_decoder = new FrameDecoder();
await channel.ReceiveAsync(_decodingContext.Buffer, _decodingContext.Offset, _decodingContext.Capacity);
if (_decodingContext.BytesLeftToProcess < ClientPreface.Length)
{
//TODO: Invalid protocol
}
// ReSharper disable once LoopCanBeConvertedToQuery
for (var i = 0; i < ClientPreface.Length; i++)
{
if (ClientPreface[i] != _decodingContext.Buffer[_decodingContext.Offset + i])
{
throw new Http2Exception(Http2ErrorCode.ProtocolError, "ClientPreface was not valid.");
}
}
_decodingContext.Offset += ClientPreface.Length;
_decodingContext.BytesLeftToProcess -= ClientPreface.Length;
// didn't get the settings frame directly
if (_decodingContext.BytesLeftToProcess == 0)
{
await _decodingContext.ReceiveMoreAsync();
}
var frame = await _decoder.DecodeAsync(_decodingContext) as SettingsFrame;
if (frame == null)
{
throw new Http2Exception(Http2ErrorCode.ProtocolError, "Expected SETTINGS frame after client preface.");
}
//ack on client frame
await _encoder.EncodeAsync(new SettingsFrame { IsAcknowledgment = true });
// our own settings.
await _encoder.EncodeAsync(new SettingsFrame());
}
public async Task ConnectAsync(Uri uri)
{
if (uri.Scheme.Equals("https", StringComparison.OrdinalIgnoreCase))
{
_channel = new SecureSocketChannel();
await _channel.ConnectAsync(uri.Host, uri.Port == 0? 443 : uri.Port);
}
else
{
_channel = new SocketChannel();
await _channel.ConnectAsync(uri.Host, uri.Port == 0? 443 : uri.Port);
}
_encodingContext = new EncodingContext(_channel);
_encoder = new FrameEncoder(_encodingContext);
Buffer.BlockCopy(ClientPreface, 0, _encodingContext.Buffer, _encodingContext.Offset, ClientPreface.Length);
_encodingContext.Offset += ClientPreface.Length;
var settingsFrame = new SettingsFrame();
await _encoder.EncodeAsync(settingsFrame);
if (_encodingContext.ContainsData)
{
await _encodingContext.SendAsync();
}
var ackOnOurFrame = await _decoder.DecodeAsync(_decodingContext) as SettingsFrame;
if (ackOnOurFrame == null)
{
//TODO: Protocol error
}
var serverSettings = await _decoder.DecodeAsync(_decodingContext) as SettingsFrame;
if (serverSettings == null)
{
//TODO: protocol error
}
}