public static async Task WriteContinuation( this IWriteAndCloseableByteStream stream, Encoder encoder, uint streamId, IEnumerable <HeaderField> headers, bool endOfHeaders = true) { var outBuf = new byte[Settings.Default.MaxFrameSize]; var result = encoder.EncodeInto(new ArraySegment <byte>(outBuf), headers); // Check if all headers could be encoded if (result.FieldCount != headers.Count()) { throw new Exception("Could not encode all headers"); } byte flags = 0; if (endOfHeaders) { flags |= (byte)ContinuationFrameFlags.EndOfHeaders; } var fh = new FrameHeader { Type = FrameType.Continuation, Length = result.UsedBytes, Flags = flags, StreamId = streamId, }; await stream.WriteFrameHeader(fh); await stream.WriteAsync( new ArraySegment <byte>(outBuf, 0, result.UsedBytes)); }
public static async Task WriteFrameHeader( this IWriteAndCloseableByteStream stream, FrameHeader fh) { var headerBytes = new byte[FrameHeader.HeaderSize]; fh.EncodeInto(new ArraySegment <byte>(headerBytes)); await stream.WriteAsync(new ArraySegment <byte>(headerBytes)); }
public static async Task WritePing( this IWriteAndCloseableByteStream stream, byte[] data, bool isAck) { var pingHeader = new FrameHeader { Type = FrameType.Ping, Flags = isAck ? (byte)PingFrameFlags.Ack : (byte)0, Length = 8, StreamId = 0, }; await stream.WriteFrameHeader(pingHeader); await stream.WriteAsync(new ArraySegment <byte>(data, 0, 8)); }
public static async Task WriteWithTimeout( this IWriteAndCloseableByteStream stream, ArraySegment <byte> buf) { var writeTask = stream.WriteAsync(buf); var timeoutTask = Task.Delay(WriteTimeout); var combined = Task.WhenAny(new Task[] { writeTask, timeoutTask }); var done = await combined; if (done == writeTask) { await writeTask; return; } throw new TimeoutException(); }
public static async Task WriteSettings( this IWriteAndCloseableByteStream stream, Settings settings) { var settingsData = new byte[settings.RequiredSize]; var fh = new FrameHeader { Type = FrameType.Settings, Length = settingsData.Length, Flags = 0, StreamId = 0, }; settings.EncodeInto(new ArraySegment <byte>(settingsData)); await stream.WriteFrameHeader(fh); await stream.WriteAsync(new ArraySegment <byte>(settingsData)); }
public static async Task WritePriority( this IWriteAndCloseableByteStream stream, uint streamId, PriorityData prioData) { var fh = new FrameHeader { Type = FrameType.Priority, Flags = 0, Length = PriorityData.Size, StreamId = streamId, }; await stream.WriteFrameHeader(fh); var payload = new byte[PriorityData.Size]; prioData.EncodeInto(new ArraySegment <byte>(payload)); await stream.WriteAsync(new ArraySegment <byte>(payload)); }
public static async Task WriteResetStream( this IWriteAndCloseableByteStream stream, uint streamId, ErrorCode errc) { var fh = new FrameHeader { Type = FrameType.ResetStream, Flags = 0, Length = ResetFrameData.Size, StreamId = streamId, }; var data = new ResetFrameData { ErrorCode = errc, }; var dataBytes = new byte[ResetFrameData.Size]; data.EncodeInto(new ArraySegment <byte>(dataBytes)); await stream.WriteFrameHeader(fh); await stream.WriteAsync(new ArraySegment <byte>(dataBytes)); }
public static async Task WriteWindowUpdate( this IWriteAndCloseableByteStream stream, uint streamId, int amount) { var windowUpdateHeader = new FrameHeader { Type = FrameType.WindowUpdate, Flags = 0, Length = WindowUpdateData.Size, StreamId = streamId, }; var data = new WindowUpdateData { WindowSizeIncrement = amount, }; var dataBytes = new byte[WindowUpdateData.Size]; data.EncodeInto(new ArraySegment <byte>(dataBytes)); await stream.WriteFrameHeader(windowUpdateHeader); await stream.WriteAsync(new ArraySegment <byte>(dataBytes)); }
public static async Task WriteGoAway( this IWriteAndCloseableByteStream stream, uint lastStreamId, ErrorCode errc, byte[] debugData = null) { if (debugData == null) { debugData = new byte[0]; } var goAwayData = new GoAwayFrameData { Reason = new GoAwayReason { LastStreamId = lastStreamId, ErrorCode = errc, DebugData = new ArraySegment <byte>(debugData), }, }; var fh = new FrameHeader { Type = FrameType.GoAway, Flags = 0, StreamId = 0, Length = goAwayData.RequiredSize, }; var dataBytes = new byte[goAwayData.RequiredSize]; goAwayData.EncodeInto(new ArraySegment <byte>(dataBytes)); await stream.WriteFrameHeader(fh); await stream.WriteAsync(new ArraySegment <byte>(dataBytes)); }
static async Task HandleConnection( ILoggerProvider logProvider, ConnectionConfiguration config, bool useUpgrade, IReadableByteStream inputStream, IWriteAndCloseableByteStream outputStream, int connectionId) { var upgradeReadStream = new UpgradeReadStream(inputStream); ServerUpgradeRequest upgrade = null; try { // Wait for either HTTP/1 upgrade header or HTTP/2 magic header await upgradeReadStream.WaitForHttpHeader(); var headerBytes = upgradeReadStream.HeaderBytes; if (MaybeHttpStart(headerBytes)) { // This seems to be a HTTP/2 request // No upgrade necessary // Make the header rereadable by the stream reader consumer, // so that the library can also read the preface upgradeReadStream.UnreadHttpHeader(); } else { // This seems to be a HTTP/1 request // Parse the header and check whether it's an upgrade var request = Http1Request.ParseFrom( Encoding.ASCII.GetString( headerBytes.Array, headerBytes.Offset, headerBytes.Count - 4)); // Assure that the HTTP/2 library does not get passed the HTTP/1 request upgradeReadStream.ConsumeHttpHeader(); if (request.Protocol != "HTTP/1.1") { throw new Exception("Invalid upgrade request"); } // If the request has some payload we can't process it in this demo string contentLength; if (request.Headers.TryGetValue("content-length", out contentLength)) { await outputStream.WriteAsync( new ArraySegment <byte>(UpgradeErrorResponse)); await outputStream.CloseAsync(); return; } string connectionHeader; string hostHeader; string upgradeHeader; string http2SettingsHeader; if (!request.Headers.TryGetValue("connection", out connectionHeader) || !request.Headers.TryGetValue("host", out hostHeader) || !request.Headers.TryGetValue("upgrade", out upgradeHeader) || !request.Headers.TryGetValue("http2-settings", out http2SettingsHeader) || upgradeHeader != "h2c" || http2SettingsHeader.Length == 0) { throw new Exception("Invalid upgrade request"); } var connParts = connectionHeader .Split(new char[] { ',' }) .Select(p => p.Trim()) .ToArray(); if (connParts.Length != 2 || !connParts.Contains("Upgrade") || !connParts.Contains("HTTP2-Settings")) { throw new Exception("Invalid upgrade request"); } var headers = new List <HeaderField>(); headers.Add(new HeaderField { Name = ":method", Value = request.Method }); headers.Add(new HeaderField { Name = ":path", Value = request.Path }); headers.Add(new HeaderField { Name = ":scheme", Value = "http" }); foreach (var kvp in request.Headers) { // Skip Connection upgrade related headers if (kvp.Key == "connection" || kvp.Key == "upgrade" || kvp.Key == "http2-settings") { continue; } headers.Add(new HeaderField { Name = kvp.Key, Value = kvp.Value, }); } var upgradeBuilder = new ServerUpgradeRequestBuilder(); upgradeBuilder.SetHeaders(headers); upgradeBuilder.SetHttp2Settings(http2SettingsHeader); upgrade = upgradeBuilder.Build(); if (!upgrade.IsValid) { await outputStream.WriteAsync( new ArraySegment <byte>(UpgradeErrorResponse)); await outputStream.CloseAsync(); return; } // Respond to upgrade await outputStream.WriteAsync( new ArraySegment <byte>(UpgradeSuccessResponse)); } } catch (Exception e) { Console.WriteLine("Error during connection upgrade: {0}", e.Message); await outputStream.CloseAsync(); return; } // Build a HTTP connection on top of the stream abstraction var http2Con = new Connection( config, upgradeReadStream, outputStream, options: new Connection.Options { Logger = logProvider.CreateLogger("HTTP2Conn" + connectionId), ServerUpgradeRequest = upgrade, }); // Close the connection if we get a GoAway from the client var remoteGoAwayTask = http2Con.RemoteGoAwayReason; var closeWhenRemoteGoAway = Task.Run(async() => { await remoteGoAwayTask; await http2Con.GoAwayAsync(ErrorCode.NoError, true); }); }