private async Task <WebSocket> AcceptWebSocketAsync(WebSocketAcceptContext context)
{
IDictionary <string, object> options = null;
if (context is OwinWebSocketAcceptContext)
{
var acceptContext = context as OwinWebSocketAcceptContext;
options = acceptContext.Options;
_subProtocol = acceptContext.SubProtocol;
}
else if (context?.SubProtocol != null)
{
options = new Dictionary <string, object>(1)
{
{ OwinConstants.WebSocket.SubProtocol, context.SubProtocol }
};
_subProtocol = context.SubProtocol;
}
// Accept may have been called synchronously on the original request thread, we might not have a task yet. Go async.
await _upstreamWentAsync.Task;
_owinWebSocketAccept(options, OwinAcceptCallback);
_requestTcs.TrySetResult(0); // Let the pipeline unwind.
return(await _acceptTcs.Task);
}
public ValueTask <IWebSocketConnection> AcceptWebSocketConnectionAsync(WebSocketAcceptContext acceptContext)
{
if (!IsWebSocketRequest)
{
throw new InvalidOperationException("Not a WebSocket request."); // TODO: LOC
}
string subProtocol = null;
if (acceptContext != null)
{
subProtocol = acceptContext.SubProtocol;
}
_logger.LogDebug("WebSocket Handshake completed. SubProtocol: {0}", subProtocol);
var key = string.Join(", ", _context.Request.Headers[Constants.Headers.SecWebSocketKey]);
var responseHeaders = HandshakeHelpers.GenerateResponseHeaders(key, subProtocol);
foreach (var headerPair in responseHeaders)
{
_context.Response.Headers[headerPair.Key] = headerPair.Value;
}
// TODO: Avoid task allocation if there's a ValueTask-based UpgradeAsync?
return(new ValueTask <IWebSocketConnection>(AcceptWebSocketConnectionCoreAsync(subProtocol)));
}
public async Task <WebSocket> AcceptAsync(WebSocketAcceptContext acceptContext)
{
if (!IsWebSocketRequest)
{
throw new InvalidOperationException("Not a WebSocket request."); // TODO: LOC
}
string?subProtocol = null;
if (acceptContext != null)
{
subProtocol = acceptContext.SubProtocol;
}
TimeSpan keepAliveInterval = _options.KeepAliveInterval;
var advancedAcceptContext = acceptContext as ExtendedWebSocketAcceptContext;
if (advancedAcceptContext != null)
{
if (advancedAcceptContext.KeepAliveInterval.HasValue)
{
keepAliveInterval = advancedAcceptContext.KeepAliveInterval.Value;
}
}
string key = _context.Request.Headers[HeaderNames.SecWebSocketKey];
HandshakeHelpers.GenerateResponseHeaders(key, subProtocol, _context.Response.Headers);
Stream opaqueTransport = await _upgradeFeature.UpgradeAsync(); // Sets status code to 101
return(WebSocket.CreateFromStream(opaqueTransport, isServer: true, subProtocol: subProtocol, keepAliveInterval: keepAliveInterval));
}
public override Task <WebSocket> AcceptWebSocketAsync(WebSocketAcceptContext acceptContext)
{
if (WebSocketFeature == null)
{
throw new NotSupportedException("WebSockets are not supported");
}
return(WebSocketFeature.AcceptAsync(acceptContext));
}
private async Task <WebSocket> CreateCompressionWebSocket(WebSocketAcceptContext acceptContext, string subProtocol)
{
WebSocketCompressionAcceptContext compressionAcceptContext = acceptContext as WebSocketCompressionAcceptContext;
return(new CompressionWebSocket(await _upgradeFeature.UpgradeAsync(), subProtocol,
compressionAcceptContext?.KeepAliveInterval ?? _options.KeepAliveInterval,
compressionAcceptContext?.ReceiveBufferSize ?? _options.ReceiveBufferSize
));
}
Task <WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
HttpContext.Response.StatusCode = 101; // Switching Protocols
var websockets = TestWebSocket.CreatePair(context.SubProtocol);
_clientWebSocketTcs.SetResult(websockets.Item1);
_serverWebSocket = websockets.Item2;
return(Task.FromResult <WebSocket>(_serverWebSocket));
}
public Task <WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
var clientToServer = Channel.CreateUnbounded <WebSocketMessage>();
var serverToClient = Channel.CreateUnbounded <WebSocketMessage>();
var clientSocket = new WebSocketChannel(serverToClient.In, clientToServer.Out);
var serverSocket = new WebSocketChannel(clientToServer.In, serverToClient.Out);
Client = clientSocket;
return(Task.FromResult <WebSocket>(serverSocket));
}
Task <WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
// TODO: Advanced params
string subProtocol = null;
if (context != null)
{
subProtocol = context.SubProtocol;
}
return(_requestContext.AcceptWebSocketAsync(subProtocol));
}
Task <WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
object obj;
if (!Environment.TryGetValue(OwinConstants.WebSocket.AcceptAlt, out obj))
{
throw new NotSupportedException("WebSockets are not supported"); // TODO: LOC
}
var accept = (Func <WebSocketAcceptContext, Task <WebSocket> >)obj;
return(accept(context));
}
public async Task<WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
try
{
WebSocket ws = await _session.AcceptWebSocket();
return ws;
}
finally
{
_acceptedTcs.SetResult(true);
}
}
public Task <WebSocket> AcceptAsync(WebSocketAcceptContext acceptContext)
{
string subProtocol = acceptContext?.SubProtocol;
if (!IsWebSocketRequest)
{
throw new InvalidOperationException("The current request is not a supported WebSocket handshake request.");
}
SetAcceptWebSocketHandshakeHeaders(_context, subProtocol);
return(CreateCompressionWebSocket(acceptContext, subProtocol));
}
public async Task <WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
try
{
WebSocket ws = await _session.AcceptWebSocket();
return(ws);
}
finally
{
_acceptedTcs.SetResult(true);
}
}
public Task <WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
var clientToServer = Channel.CreateUnbounded <WebSocketMessage>();
var serverToClient = Channel.CreateUnbounded <WebSocketMessage>();
var clientSocket = new WebSocketChannel(serverToClient.Reader, clientToServer.Writer);
var serverSocket = new WebSocketChannel(clientToServer.Reader, serverToClient.Writer);
Client = clientSocket;
SubProtocol = context.SubProtocol;
_accepted.TrySetResult(null);
return(Task.FromResult <WebSocket>(serverSocket));
}
async Task <WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
var websockets = TestWebSocket.CreatePair(context.SubProtocol);
if (_httpContext.Response.HasStarted)
{
throw new InvalidOperationException("The response has already started");
}
_httpContext.Response.StatusCode = StatusCodes.Status101SwitchingProtocols;
ClientWebSocket = websockets.Item1;
ServerWebSocket = websockets.Item2;
await _httpContext.Response.Body.FlushAsync(_httpContext.RequestAborted); // Send headers to the client
return(ServerWebSocket);
}
public async Task <WebSocket> AcceptAsync(WebSocketAcceptContext acceptContext)
{
if (!IsWebSocketRequest)
{
throw new InvalidOperationException("Not a WebSocket request."); // TODO: LOC
}
string subProtocol = null;
if (acceptContext != null)
{
subProtocol = acceptContext.SubProtocol;
}
TimeSpan keepAliveInterval = _options.KeepAliveInterval;
int receiveBufferSize = _options.ReceiveBufferSize;
var advancedAcceptContext = acceptContext as ExtendedWebSocketAcceptContext;
if (advancedAcceptContext != null)
{
if (advancedAcceptContext.ReceiveBufferSize.HasValue)
{
receiveBufferSize = advancedAcceptContext.ReceiveBufferSize.Value;
}
if (advancedAcceptContext.KeepAliveInterval.HasValue)
{
keepAliveInterval = advancedAcceptContext.KeepAliveInterval.Value;
}
}
string key = string.Join(", ", _context.Request.Headers[Constants.Headers.SecWebSocketKey]);
var responseHeaders = HandshakeHelpers.GenerateResponseHeaders(key, subProtocol);
foreach (var headerPair in responseHeaders)
{
_context.Response.Headers[headerPair.Key] = headerPair.Value;
}
Stream opaqueTransport = await _upgradeFeature.UpgradeAsync(); // Sets status code to 101
// Allocate a buffer for receive (default is 4k)
var buffer = new byte[receiveBufferSize];
return(WebSocketProtocol.CreateFromStream(opaqueTransport, isServer: true, subProtocol: subProtocol, keepAliveInterval: keepAliveInterval, buffer: buffer));
}
Task <WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
var websockets = TestWebSocket.CreatePair(context.SubProtocol);
if (_clientWebSocketTcs.TrySetResult(websockets.Item1))
{
Context.HttpContext.Response.StatusCode = StatusCodes.Status101SwitchingProtocols;
_serverWebSocket = websockets.Item2;
return(Task.FromResult(_serverWebSocket));
}
else
{
Context.HttpContext.Response.StatusCode = StatusCodes.Status500InternalServerError;
websockets.Item1.Dispose();
websockets.Item2.Dispose();
return(_clientWebSocketTcs.Task); // Canceled or Faulted - no result
}
}
public static AppFunc AdaptWebSockets(AppFunc next)
{
return(async environment =>
{
object accept;
if (environment.TryGetValue(OwinConstants.WebSocket.AcceptAlt, out accept) && accept is WebSocketAcceptAlt)
{
var adapter = new WebSocketAcceptAdapter(environment, (WebSocketAcceptAlt)accept);
environment[OwinConstants.WebSocket.Accept] = new WebSocketAccept(adapter.AcceptWebSocket);
await next(environment);
if ((int)environment[OwinConstants.ResponseStatusCode] == 101 && adapter._callback != null)
{
WebSocketAcceptContext acceptContext = null;
object obj;
if (adapter._options != null && adapter._options.TryGetValue(typeof(WebSocketAcceptContext).FullName, out obj))
{
acceptContext = obj as WebSocketAcceptContext;
}
else if (adapter._options != null)
{
acceptContext = new OwinWebSocketAcceptContext(adapter._options);
}
var webSocket = await adapter._accept(acceptContext);
var webSocketAdapter = new WebSocketAdapter(webSocket, (CancellationToken)environment[OwinConstants.CallCancelled]);
await adapter._callback(webSocketAdapter.Environment);
await webSocketAdapter.CleanupAsync();
}
}
else
{
await next(environment);
}
});
}
public async Task <WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
Debug.Assert(IsWebSocketRequest);
var response = Context.Response;
var deflateOptions = ParseDeflateOptions(Context.Request.Headers[WebSocketHeaders.SecWebSocketExtensions].FirstOrDefault() ?? string.Empty, out var responseExtensions);
if (deflateOptions is not null)
{
response.Headers[WebSocketHeaders.SecWebSocketExtensions] = responseExtensions;
}
response.Headers[WebSocketHeaders.Connection] = "Upgrade";
response.Headers[WebSocketHeaders.ConnectionUpgrade] = "websocket";
response.Headers[WebSocketHeaders.SecWebSocketAccept] = CreateResponseKey();
// Sets status code to 101
var stream = await _upgradeFeature.UpgradeAsync();
if (stream == null)
{
Context.Abort();
throw new WebSocketException("Failed to upgrade websocket connection.");
}
s_managedWebSocketType ??= typeof(WebSocket).Assembly.GetType("System.Net.WebSockets.ManagedWebSocket", throwOnError: true);
s_webSocketCtor ??= s_managedWebSocketType.GetConstructors(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance).First(x => x.GetParameters().Length == 2);
s_webSocketOptionsType ??= typeof(WebSocket).Assembly.GetType("System.Net.WebSockets.WebSocketCreationOptions", throwOnError: true);
object options = Activator.CreateInstance(s_webSocketOptionsType);
((dynamic)options).IsServer = true;
((dynamic)options).KeepAliveInterval = TimeSpan.Zero;
options.GetType().GetProperty("DangerousDeflateOptions").SetValue(options, deflateOptions);
return((WebSocket)s_webSocketCtor.Invoke(new object[] { stream, options }));
}
public async Task<WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
var socket = new SockJSWebSocket(await _feature.AcceptAsync(context));
await socket.OpenAsync(CancellationToken.None);
return socket;
}
Task <WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
throw new NotImplementedException();
}
public async Task<WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
var socket = new SockJsWebSocket(await _feature.AcceptAsync(context));
await socket.OpenAsync(CancellationToken.None);
return socket;
}
public Task <WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
throw new NotImplementedException();
}
/// <summary> /// /// </summary> /// <param name="acceptContext"></param> /// <returns></returns> public virtual Task <WebSocket> AcceptWebSocketAsync(WebSocketAcceptContext acceptContext) => throw new NotImplementedException();
public async Task <WebSocket> AcceptAsync(WebSocketAcceptContext acceptContext)
{
if (!IsWebSocketRequest)
{
throw new InvalidOperationException("Not a WebSocket request."); // TODO: LOC
}
string? subProtocol = null;
bool enableCompression = false;
bool serverContextTakeover = true;
int serverMaxWindowBits = 15;
TimeSpan keepAliveInterval = _options.KeepAliveInterval;
if (acceptContext != null)
{
subProtocol = acceptContext.SubProtocol;
enableCompression = acceptContext.DangerousEnableCompression;
serverContextTakeover = !acceptContext.DisableServerContextTakeover;
serverMaxWindowBits = acceptContext.ServerMaxWindowBits;
keepAliveInterval = acceptContext.KeepAliveInterval ?? keepAliveInterval;
}
#pragma warning disable CS0618 // Type or member is obsolete
if (acceptContext is ExtendedWebSocketAcceptContext advancedAcceptContext)
#pragma warning restore CS0618 // Type or member is obsolete
{
if (advancedAcceptContext.KeepAliveInterval.HasValue)
{
keepAliveInterval = advancedAcceptContext.KeepAliveInterval.Value;
}
}
var key = _context.Request.Headers.SecWebSocketKey.ToString();
HandshakeHelpers.GenerateResponseHeaders(key, subProtocol, _context.Response.Headers);
WebSocketDeflateOptions?deflateOptions = null;
if (enableCompression)
{
var ext = _context.Request.Headers.SecWebSocketExtensions;
if (ext.Count != 0)
{
// loop over each extension offer, extensions can have multiple offers, we can accept any
foreach (var extension in _context.Request.Headers.GetCommaSeparatedValues(HeaderNames.SecWebSocketExtensions))
{
if (extension.AsSpan().TrimStart().StartsWith("permessage-deflate", StringComparison.Ordinal))
{
if (HandshakeHelpers.ParseDeflateOptions(extension.AsSpan().TrimStart(), serverContextTakeover, serverMaxWindowBits, out var parsedOptions, out var response))
{
Log.CompressionAccepted(_logger, response);
deflateOptions = parsedOptions;
// If more extension types are added, this would need to be a header append
// and we wouldn't want to break out of the loop
_context.Response.Headers.SecWebSocketExtensions = response;
break;
}
}
}
if (deflateOptions is null)
{
Log.CompressionNotAccepted(_logger);
}
}
}
Stream opaqueTransport = await _upgradeFeature.UpgradeAsync(); // Sets status code to 101
return(WebSocket.CreateFromStream(opaqueTransport, new WebSocketCreationOptions()
{
IsServer = true,
KeepAliveInterval = keepAliveInterval,
SubProtocol = subProtocol,
DangerousDeflateOptions = deflateOptions
}));
}
public Task <System.Net.WebSockets.WebSocket> AcceptAsync(WebSocketAcceptContext context)
{
throw new NotSupportedException("Use IWebSocketFeature.AcceptAsync() instead.");
}
Task<WebSocket> IHttpWebSocketFeature.AcceptAsync(WebSocketAcceptContext context)
{
Context.HttpContext.Response.StatusCode = 101; // Switching Protocols
var websockets = TestWebSocket.CreatePair(context.SubProtocol);
_clientWebSocketTcs.SetResult(websockets.Item1);
_serverWebSocket = websockets.Item2;
return Task.FromResult<WebSocket>(_serverWebSocket);
}