public virtual void Initialize(IDependencyResolver resolver, HostContext context)
{
if (_initialized)
{
return;
}
_newMessageBus = resolver.Resolve<IMessageBus>();
_connectionIdPrefixGenerator = resolver.Resolve<IConnectionIdPrefixGenerator>();
_jsonSerializer = resolver.Resolve<IJsonSerializer>();
_transportManager = resolver.Resolve<ITransportManager>();
_trace = resolver.Resolve<ITraceManager>();
_serverMessageHandler = resolver.Resolve<IServerCommandHandler>();
_counters = resolver.Resolve<IPerformanceCounterManager>();
_ackHandler = resolver.Resolve<IAckHandler>();
_initialized = true;
}
private ITransport GetTransport(HostContext context)
{
return _transportManager.GetTransport(context);
}
/// <summary>
/// Handles all requests for <see cref="PersistentConnection"/>s.
/// </summary>
/// <param name="context">The <see cref="HostContext"/> for the current request.</param>
/// <returns>A <see cref="Task"/> that completes when the <see cref="PersistentConnection"/> pipeline is complete.</returns>
/// <exception cref="T:System.InvalidOperationException">
/// Thrown if connection wasn't initialized.
/// Thrown if the transport wasn't specified.
/// Thrown if the connection id wasn't specified.
/// </exception>
public virtual Task ProcessRequestAsync(HostContext context)
{
if (!_initialized)
{
throw new InvalidOperationException("Connection not initialized.");
}
if (IsNegotiationRequest(context.Request))
{
return ProcessNegotiationRequest(context);
}
_transport = GetTransport(context);
if (_transport == null)
{
throw new InvalidOperationException("Protocol error: Unknown transport.");
}
string connectionId = _transport.ConnectionId;
// If there's no connection id then this is a bad request
if (String.IsNullOrEmpty(connectionId))
{
throw new InvalidOperationException("Protocol error: Missing connection id.");
}
var groups = new List<string>(_transport.Groups);
Connection connection = CreateConnection(connectionId, groups, context.Request);
Connection = connection;
Groups = new GroupManager(connection, DefaultSignal);
_transport.TransportConnected = () =>
{
var command = new ServerCommand
{
Type = ServerCommandType.RemoveConnection,
Value = connectionId
};
return _serverMessageHandler.SendCommand(command);
};
_transport.Connected = () =>
{
return OnConnectedAsync(context.Request, connectionId);
};
_transport.Reconnected = () =>
{
return OnReconnectedAsync(context.Request, groups, connectionId);
};
_transport.Received = data =>
{
return OnReceivedAsync(context.Request, connectionId, data);
};
_transport.Error = OnErrorAsync;
_transport.Disconnected = () =>
{
return OnDisconnectAsync(connectionId);
};
return _transport.ProcessRequest(connection) ?? TaskAsyncHelper.Empty;
}
public virtual Task ProcessRequestAsync(HostContext context)
{
if (IsNegotiationRequest(context.Request))
{
return ProcessNegotiationRequest(context);
}
_transport = GetTransport(context);
if (_transport == null)
{
throw new InvalidOperationException("Unknown transport.");
}
string connectionId = _transport.ConnectionId;
// If there's no connection id then this is a bad request
if (String.IsNullOrEmpty(connectionId))
{
throw new InvalidOperationException("Protocol error: Missing connection id.");
}
IEnumerable<string> groups = _transport.Groups;
Connection = CreateConnection(connectionId, groups, context.Request);
_transport.Connected = () =>
{
return OnConnectedAsync(context.Request, connectionId);
};
_transport.Received = data =>
{
return OnReceivedAsync(connectionId, data);
};
_transport.Error = OnErrorAsync;
_transport.Disconnected = () =>
{
return OnDisconnectAsync(connectionId);
};
return _transport.ProcessRequest(Connection) ?? TaskAsyncHelper.Empty;
}
private Task ProcessNegotiationRequest(HostContext context)
{
context.Response.ContentType = Json.MimeType;
return context.Response.EndAsync(_jsonSerializer.Stringify(new
{
Url = context.Request.Url.LocalPath.Replace("/negotiate", ""),
ConnectionId = _connectionIdFactory.CreateConnectionId(context.Request),
TryWebSockets = context.SupportsWebSockets(),
WebSocketServerUrl = context.WebSocketServerUrl(),
ProtocolVersion = "1.0"
}));
}
public virtual Task ProcessRequestAsync(HostContext context)
{
Task transportEventTask = null;
if (IsNegotiationRequest(context.Request))
{
return ProcessNegotiationRequest(context);
}
_transport = GetTransport(context);
string connectionId = _transport.ConnectionId;
// If there's no connection id then this is a bad request
if (String.IsNullOrEmpty(connectionId))
{
throw new InvalidOperationException("Protocol error: Missing connection id.");
}
IEnumerable<string> groups = _transport.Groups;
Connection = CreateConnection(connectionId, groups, context.Request);
// Wire up the events we need
_transport.Connected += () =>
{
transportEventTask = OnConnectedAsync(context.Request, connectionId);
};
_transport.Received += (data) =>
{
transportEventTask = OnReceivedAsync(connectionId, data);
};
_transport.Error += (e) =>
{
transportEventTask = OnErrorAsync(e);
};
_transport.Disconnected += () =>
{
transportEventTask = OnDisconnectAsync(connectionId);
};
Func<Task> transportProcessRequest = _transport.ProcessRequest(Connection);
if (transportProcessRequest != null)
{
if (transportEventTask != null)
{
return transportEventTask.Then(transportProcessRequest).FastUnwrap();
}
return transportProcessRequest();
}
return transportEventTask ?? TaskAsyncHelper.Empty;
}
private ITransport GetTransport(HostContext context)
{
return TransportManager.GetTransport(context) ??
new LongPollingTransport(context, _jsonSerializer);
}
/// <summary>
/// Handles all requests for <see cref="PersistentConnection"/>s.
/// </summary>
/// <param name="context">The <see cref="HostContext"/> for the current request.</param>
/// <returns>A <see cref="Task"/> that completes when the <see cref="PersistentConnection"/> pipeline is complete.</returns>
/// <exception cref="T:System.InvalidOperationException">
/// Thrown if connection wasn't initialized.
/// Thrown if the transport wasn't specified.
/// Thrown if the connection id wasn't specified.
/// </exception>
public virtual Task ProcessRequestAsync(HostContext context)
{
if (!_initialized)
{
throw new InvalidOperationException("Connection not initialized.");
}
if (IsNegotiationRequest(context.Request))
{
return(ProcessNegotiationRequest(context));
}
_transport = GetTransport(context);
if (_transport == null)
{
throw new InvalidOperationException("Protocol error: Unknown transport.");
}
string connectionId = _transport.ConnectionId;
// If there's no connection id then this is a bad request
if (String.IsNullOrEmpty(connectionId))
{
throw new InvalidOperationException("Protocol error: Missing connection id.");
}
var groups = new List <string>(_transport.Groups);
Connection connection = CreateConnection(connectionId, groups, context.Request);
Connection = connection;
Groups = new GroupManager(connection, DefaultSignal);
_transport.TransportConnected = () =>
{
var command = new ServerCommand
{
Type = ServerCommandType.RemoveConnection,
Value = connectionId
};
return(_serverMessageHandler.SendCommand(command));
};
_transport.Connected = () =>
{
return(OnConnectedAsync(context.Request, connectionId));
};
_transport.Reconnected = () =>
{
return(OnReconnectedAsync(context.Request, groups, connectionId));
};
_transport.Received = data =>
{
return(OnReceivedAsync(context.Request, connectionId, data));
};
_transport.Disconnected = () =>
{
return(OnDisconnectAsync(connectionId));
};
return(_transport.ProcessRequest(connection) ?? TaskAsyncHelper.Empty);
}
private ITransport GetTransport(HostContext context)
{
return(_transportManager.GetTransport(context));
}
private Task ProcessNegotiationRequest(HostContext context)
{
var keepAlive = _configurationManager.KeepAlive;
var payload = new
{
Url = context.Request.Url.LocalPath.Replace("/negotiate", ""),
ConnectionId = _connectionIdPrefixGenerator.GenerateConnectionIdPrefix(context.Request) + Guid.NewGuid().ToString("d"),
KeepAlive = (keepAlive != null) ? keepAlive.Value.TotalSeconds : (double?)null,
TryWebSockets = _transportManager.SupportsTransport(WebSocketsTransportName) && context.SupportsWebSockets(),
WebSocketServerUrl = context.WebSocketServerUrl(),
ProtocolVersion = "1.0"
};
if (!String.IsNullOrEmpty(context.Request.QueryString["callback"]))
{
return ProcessJsonpNegotiationRequest(context, payload);
}
context.Response.ContentType = Json.MimeType;
return context.Response.EndAsync(_jsonSerializer.Stringify(payload));
}
/// <summary>
/// Handles all requests for <see cref="PersistentConnection"/>s.
/// </summary>
/// <param name="context">The <see cref="HostContext"/> for the current request.</param>
/// <returns>A <see cref="Task"/> that completes when the <see cref="PersistentConnection"/> pipeline is complete.</returns>
/// <exception cref="T:System.InvalidOperationException">
/// Thrown if connection wasn't initialized.
/// Thrown if the transport wasn't specified.
/// Thrown if the connection id wasn't specified.
/// </exception>
public virtual Task ProcessRequestAsync(HostContext context)
{
if (!_initialized)
{
throw new InvalidOperationException("Connection not initialized.");
}
if (IsNegotiationRequest(context.Request))
{
return ProcessNegotiationRequest(context);
}
_transport = GetTransport(context);
if (_transport == null)
{
throw new InvalidOperationException("Protocol error: Unknown transport.");
}
string connectionId = _transport.ConnectionId;
// If there's no connection id then this is a bad request
if (String.IsNullOrEmpty(connectionId))
{
throw new InvalidOperationException("Protocol error: Missing connection id.");
}
IEnumerable<string> signals = GetSignals(connectionId);
IEnumerable<string> groups = OnRejoiningGroups(context.Request, _transport.Groups, connectionId);
Connection connection = CreateConnection(connectionId, signals, groups);
Connection = connection;
Groups = new GroupManager(connection, DefaultSignal);
_transport.TransportConnected = () =>
{
var command = new ServerCommand
{
Type = ServerCommandType.RemoveConnection,
Value = connectionId
};
return _serverMessageHandler.SendCommand(command);
};
_transport.Connected = () =>
{
return OnConnectedAsync(context.Request, connectionId).OrEmpty();
};
_transport.Reconnected = () =>
{
return OnReconnectedAsync(context.Request, connectionId).OrEmpty();
};
_transport.Received = data =>
{
return OnReceivedAsync(context.Request, connectionId, data).OrEmpty();
};
_transport.Disconnected = () =>
{
return OnDisconnectAsync(context.Request, connectionId).OrEmpty();
};
return _transport.ProcessRequest(connection).OrEmpty().Catch(_counters.ErrorsAllTotal, _counters.ErrorsAllPerSec);
}
private ITransport GetTransport(HostContext context)
{
return(TransportManager.GetTransport(context) ??
new LongPollingTransport(context, _jsonSerializer));
}
private Task ProcessNegotiationRequest(HostContext context)
{
context.Response.ContentType = Json.MimeType;
return context.Response.WriteAsync(_jsonSerializer.Stringify(new
{
Url = context.Request.Path.Replace("/negotiate", ""),
ConnectionId = _connectionIdFactory.CreateConnectionId(context.Request),
TryWebSockets = context.SupportsWebSockets()
}));
}
private Task ProcessJsonpNegotiationRequest(HostContext context, object payload)
{
context.Response.ContentType = Json.JsonpMimeType;
var data = Json.CreateJsonpCallback(context.Request.QueryString["callback"], _jsonSerializer.Stringify(payload));
return context.Response.EndAsync(data);
}
/// <summary>
/// Handles all requests for <see cref="PersistentConnection"/>s.
/// </summary>
/// <param name="context">The <see cref="HostContext"/> for the current request.</param>
/// <returns>A <see cref="Task"/> that completes when the <see cref="PersistentConnection"/> pipeline is complete.</returns>
/// <exception cref="T:System.InvalidOperationException">
/// Thrown if connection wasn't initialized.
/// Thrown if the transport wasn't specified.
/// Thrown if the connection id wasn't specified.
/// </exception>
public virtual Task ProcessRequestAsync(HostContext context)
{
if (!_initialized)
{
throw new InvalidOperationException("Connection not initialized.");
}
if (IsNegotiationRequest(context.Request))
{
return(ProcessNegotiationRequest(context));
}
_transport = GetTransport(context);
if (_transport == null)
{
throw new InvalidOperationException("Protocol error: Unknown transport.");
}
string connectionId = _transport.ConnectionId;
// If there's no connection id then this is a bad request
if (String.IsNullOrEmpty(connectionId))
{
throw new InvalidOperationException("Protocol error: Missing connection id.");
}
IEnumerable <string> signals = GetSignals(connectionId, context.Request);
IEnumerable <string> groups = OnRejoiningGroups(context.Request, _transport.Groups, connectionId);
Connection connection = CreateConnection(connectionId, signals, groups);
Connection = connection;
Groups = new GroupManager(connection, DefaultSignal);
_transport.TransportConnected = () =>
{
var command = new ServerCommand
{
Type = ServerCommandType.RemoveConnection,
Value = connectionId
};
return(_serverMessageHandler.SendCommand(command));
};
_transport.Connected = () =>
{
return(OnConnectedAsync(context.Request, connectionId).OrEmpty());
};
_transport.Reconnected = () =>
{
return(OnReconnectedAsync(context.Request, groups, connectionId).OrEmpty());
};
_transport.Received = data =>
{
return(OnReceivedAsync(context.Request, connectionId, data).OrEmpty());
};
_transport.Disconnected = () =>
{
return(OnDisconnectAsync(connectionId).OrEmpty());
};
return(_transport.ProcessRequest(connection).OrEmpty().Catch(_allErrorsTotalCounter, _allErrorsPerSecCounter));
}
private Task ProcessNegotiationRequest(HostContext context)
{
var payload = new
{
Url = context.Request.Url.LocalPath.Replace("/negotiate", ""),
ConnectionId = _connectionIdGenerator.GenerateConnectionId(context.Request),
TryWebSockets = _transportManager.SupportsTransport(WebSocketsTransportName) && context.SupportsWebSockets(),
WebSocketServerUrl = context.WebSocketServerUrl(),
ProtocolVersion = "1.0"
};
if (!String.IsNullOrEmpty(context.Request.QueryString["callback"]))
{
return ProcessJsonpNegotiationRequest(context, payload);
}
context.Response.ContentType = Json.MimeType;
return context.Response.EndAsync(_jsonSerializer.Stringify(payload));
}
private Task ProcessRequestAsync(HttpListenerContext context)
{
try
{
Debug.WriteLine("Server: Incoming request to {0}.", context.Request.Url);
PersistentConnection connection;
string path = ResolvePath(context.Request.Url);
foreach (var embeddedFileHandler in _embeddedFileHandlers)
{
var result = embeddedFileHandler.Handle(path, context);
if (result != null)
{
return result;
}
}
if (_routingHost.TryGetConnection(path, out connection))
{
// https://developer.mozilla.org/En/HTTP_Access_Control
string origin = context.Request.Headers["Origin"];
if (!String.IsNullOrEmpty(origin))
{
context.Response.AddHeader("Access-Control-Allow-Origin", origin);
context.Response.AddHeader("Access-Control-Allow-Credentials", "true");
}
var request = new HttpListenerRequestWrapper(context);
var response = new HttpListenerResponseWrapper(context.Response, _disconnectHandler.GetDisconnectToken(context));
var hostContext = new HostContext(request, response);
#if NET45
hostContext.Items[HostConstants.SupportsWebSockets] = Environment.OSVersion.Version.Major >= 6 && Environment.OSVersion.Version.Minor >= 2;
#endif
if (OnProcessRequest != null)
{
OnProcessRequest(hostContext);
}
#if DEBUG
hostContext.Items[HostConstants.DebugMode] = true;
#endif
hostContext.Items["System.Net.HttpListenerContext"] = context;
// Initialize the connection
connection.Initialize(_routingHost.DependencyResolver);
return connection.ProcessRequestAsync(hostContext);
}
if (path.Equals("/clientaccesspolicy.xml", StringComparison.InvariantCultureIgnoreCase))
{
using (var stream = typeof(WebAppServer).Assembly.GetManifestResourceStream(typeof(WebAppServer), "clientaccesspolicy.xml"))
{
if (stream == null)
{
var response = new HttpResponseMessage(HttpStatusCode.NotFound);
return context.SendResponseAsync(response);
}
var bytes = new byte[1024];
int byteCount = stream.Read(bytes, 0, bytes.Length);
return context.Response.WriteAsync(new ArraySegment<byte>(bytes, 0, byteCount));
}
}
HttpRequestMessage requestMessage = context.GetHttpRequestMessage();
return _webApiServer.PublicSendAsync(requestMessage, _disconnectHandler.GetDisconnectToken(context))
.Then(response =>
{
var responseMessage = response ?? new HttpResponseMessage(HttpStatusCode.InternalServerError) { RequestMessage = requestMessage };
return context.SendResponseAsync(responseMessage);
});
}
catch (Exception ex)
{
return TaskAsyncHelper.FromError(ex);
}
}
