private async ValueTask <DoneHandle> CloseNow(bool needWakeup) { if (Interlocked.CompareExchange(ref closeConnectionIssued, 1, 0) == 0) { try { await outStream.CloseAsync(); } catch (Exception) { } if (needWakeup) { lock (shared.Mutex) { shared.CloseRequested = true; } wakeupWriter.Set(); } } return(DoneHandle.Instance); }
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); }); }