// Lazy environment initialization
public CancellationToken GetCallCancelled()
{
_cts = new CancellationTokenSource();
CancellationToken ct = _disconnectHandler.GetDisconnectToken(_requestContext);
_disconnectRegistration = ct.Register(SetDisconnected, this);
return(_cts.Token);
}
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));
}
}
