private static void FinalizeRejectedResponse(HttpListenerRequest request, HttpListenerResponse response, int statusCode, string statusDescription, Uri callbackUrl)
{
string remoteAddress = request.RemoteEndPoint.Address.ToString();
try
{
response.StatusCode = statusCode;
response.StatusDescription = statusDescription;
}
finally
{
response.Close();
}
if (callbackUrl == null)
{
Supervisor.LogEvent(string.Format("Cancellation rejected from {0} due to: {1}.", remoteAddress, statusDescription), TraceEventType.Verbose);
}
else
{
Supervisor.LogEvent(string.Format("Cancellation rejected for {0} from {1} due to: {2}.", callbackUrl.OriginalString, remoteAddress, statusDescription), TraceEventType.Verbose);
}
}
protected override void OnPause()
{
Supervisor.Pause();
base.OnPause();
}
protected override void OnContinue()
{
Supervisor.Resume();
base.OnContinue();
}
public void Process(HttpListenerRequest request, HttpListenerResponse response)
{
try
{
if (request.HttpMethod != "PUT" && request.HttpMethod != "DELETE")
{
FinalizeRejectedResponse(request, response, 405, "Method Not Supported", null);
return;
}
if (request.QueryString.Count < 2)
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", null);
return;
}
Guid?guid = RetrieveGuidParameter(request);
if (!guid.HasValue)
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", null);
return;
}
Uri url = RetrieveUrlParameter(request);
if (url == null)
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", null);
return;
}
if (UrlContainsDangerousMarkup(url))
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", url);
return;
}
RevaleeUrlAuthorization authorization = Supervisor.Configuration.AuthorizedTargets.Match(url);
if (authorization == null)
{
// Keep all authorization errors homogeneous from the client perspective
RevaleeUrlAuthorization.ObfuscateExecutionTime();
FinalizeRejectedResponse(request, response, 401, "Unauthorized", url);
return;
}
if (!authorization.IsAuthorizedRequestSource(request.RemoteEndPoint.Address))
{
// Keep all authorization errors homogeneous from the client perspective
RevaleeUrlAuthorization.ObfuscateExecutionTime();
FinalizeRejectedResponse(request, response, 401, "Unauthorized", url);
return;
}
if (Supervisor.Work.IsOverloaded)
{
FinalizeRejectedResponse(request, response, 503, "Service Unavailable", url);
return;
}
RevaleeTask taskToCancel = RevaleeTask.Revive(DateTime.MinValue, url, DateTime.UtcNow, guid.Value, 0, null);
Supervisor.State.CancelTask(taskToCancel);
FinalizeAcceptedResponse(request, response, guid.Value, url);
return;
}
catch (HttpListenerException hlex)
{
Supervisor.LogException(hlex, TraceEventType.Error, request.RawUrl);
FinalizeRejectedResponse(request, response, 500, "Error Occurred", null);
return;
}
}
public void Process(HttpListenerRequest request, HttpListenerResponse response)
{
try
{
if (request.HttpMethod != "PUT")
{
FinalizeRejectedResponse(request, response, 405, "Method Not Supported", null);
return;
}
if (request.QueryString.Count < 2)
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", null);
return;
}
Uri url = RetrieveUrlParameter(request);
if (url == null)
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", null);
return;
}
DateTime?time = RetrieveTimeParameter(request);
if (!time.HasValue)
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", url);
return;
}
if (UrlContainsDangerousMarkup(url))
{
FinalizeRejectedResponse(request, response, 400, "Bad Request", url);
return;
}
RevaleeUrlAuthorization authorization = Supervisor.Configuration.AuthorizedTargets.Match(url);
if (authorization == null)
{
// Keep all authorization errors homogeneous from the client perspective
RevaleeUrlAuthorization.ObfuscateExecutionTime();
FinalizeRejectedResponse(request, response, 401, "Unauthorized", url);
return;
}
if (!authorization.IsAuthorizedRequestSource(request.RemoteEndPoint.Address))
{
// Keep all authorization errors homogeneous from the client perspective
RevaleeUrlAuthorization.ObfuscateExecutionTime();
FinalizeRejectedResponse(request, response, 401, "Unauthorized", url);
return;
}
if (Supervisor.Work.IsOverloaded)
{
FinalizeRejectedResponse(request, response, 503, "Service Unavailable", url);
return;
}
string authorizationCipher = RetrieveAuthorizationHeader(request);
RevaleeTask newTask = new RevaleeTask(time.Value, url, authorization.RetryCount, authorizationCipher);
Supervisor.State.AddTask(newTask);
FinalizeAcceptedResponse(request, response, newTask);
return;
}
catch (HttpListenerException hlex)
{
Supervisor.LogException(hlex, TraceEventType.Error, request.RawUrl);
FinalizeRejectedResponse(request, response, 500, "Error Occurred", null);
return;
}
}
public static void Run()
{
Console.WriteLine("===] REVALEE [=== v{0}", GetVersionNumber());
Console.WriteLine(" {0}", GetCopyrightInformation());
Console.WriteLine();
if (!CheckInstallation())
{
return;
}
WriteStatusMessage("Initializing...");
try
{
Supervisor.Start();
}
catch (Exception ex)
{
Console.WriteLine();
Console.WriteLine("Revalee service cannot start due to the following critical error:");
Console.WriteLine("* {0}", ex.Message);
Console.WriteLine();
Console.WriteLine("Press any key to terminate.");
Console.ReadKey(true);
throw;
}
try
{
ClearStatusMessage();
if (Supervisor.Configuration.ListenerPrefixes.Count == 0)
{
Console.WriteLine("Revalee service is running but is not listening for callback requests.");
}
else if (Supervisor.Configuration.ListenerPrefixes.Count == 1)
{
Console.WriteLine("Revalee service is running and listening on {0}.", Supervisor.Configuration.ListenerPrefixes[0]);
}
else
{
Console.WriteLine("Revalee service is running and listening on:");
foreach (ListenerPrefix prefix in Supervisor.Configuration.ListenerPrefixes)
{
Console.WriteLine(" {0}", prefix);
}
}
Console.WriteLine("Press any key to terminate.");
Console.ReadKey(true);
Console.WriteLine();
}
finally
{
WriteStatusMessage("Service stopping...");
try
{
Supervisor.Stop();
}
catch (ThreadAbortException)
{
// Ignore thread abort exceptions on shutdown
}
catch (ObjectDisposedException)
{
// Ignore object disposed exceptions on shutdown
}
ClearStatusMessage();
Console.WriteLine();
}
}
