public void SendResponse(MessageContext context, HttpResponsePacket response )
{
if (disposed) throw new ObjectDisposedException("Subscriber has been disposed");
if (String.IsNullOrEmpty(context.ReplyToQueue)) return;
if (conn == null)
{
//TODO: Log this -- it technically shouldn't happen. Also translate to a HTTP Unreachable because it means StartCallbackQueueConsumer didn't create a connection
throw new ApplicationException("This is Bad");
}
//TODO: Channel Pool this connection
using (IModel channel = conn.CreateModel())
{
BasicProperties basicProperties = new BasicProperties { CorrelationId = context.CorrelationId };
try
{
channel.BasicPublish(String.Empty,
context.ReplyToQueue,
basicProperties,
response.Serialize());
}
catch {
//TODO: Log execption
}
}
}
private async Task ProcessRequest(MessageContext restbusContext, CancellationToken cancellationToken)
{
//NOTE: This method is called on a background thread and must be protected by an outer big-try catch
//HttpRequestMessage requestMsg;
HttpResponse responseMsg = null;
var msg = restbusContext.Request.ToServiceMessage();
var httpContext = new DefaultHttpContext(msg);
await appFunc.Invoke(httpContext).ConfigureAwait(false);
responseMsg = httpContext.Response;
//if (!restbusContext.Request.TryGetHttpRequestMessage(appVirtualPath ?? (appVirtualPath = System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath), out requestMsg))
//{
// responseMsg = new HttpResponseMessage(HttpStatusCode.BadRequest) { ReasonPhrase = "Bad Request" };
//}
//TODO: Implement disposed
//if (disposed)
//{
// responseMsg = requestMsg.CreateErrorResponse(HttpStatusCode.ServiceUnavailable, "The server is no longer available.");
//}
//else
//{
// requestHandler.EnsureInitialized();
// // Add current synchronization context to request parameter
// SynchronizationContext syncContext = SynchronizationContext.Current;
// if (syncContext != null)
// {
// requestMsg.SetSynchronizationContext(syncContext);
// }
// // Add HttpConfiguration to request parameter
// requestMsg.SetConfiguration(config);
// // Ensure we have a principal, even if the host didn't give us one
// IPrincipal originalPrincipal = Thread.CurrentPrincipal;
// if (originalPrincipal == null)
// {
// Thread.CurrentPrincipal = anonymousPrincipal.Value;
// }
// // Ensure we have a principal on the request context (if there is a request context).
// HttpRequestContext requestContext = requestMsg.GetRequestContext();
// if (requestContext == null)
// {
// requestContext = new RequestBackedHttpRequestContext(requestMsg);
// // if the host did not set a request context we will also set it back to the request.
// requestMsg.SetRequestContext(requestContext);
// }
// try
// {
// try
// {
// responseMsg = await requestHandler.SendMessageAsync(requestMsg, cancellationToken);
// }
// catch (HttpResponseException exception)
// {
// responseMsg = exception.Response;
// }
// catch (NullReferenceException exception)
// {
// // There is a bug in older versions of HttpRoutingDispatcher which causes a null reference exception when
// // a route could not be found
// // This bug can be triggered by sending a request for a url that doesn't have a route
// // This commit fixes the bug https://github.com/ASP-NET-MVC/aspnetwebstack/commit/6a0c03f9e549966a7f806f8b696ec4cb2ec272e6#diff-c89c7bee3d225a037a6d04e8e4447460
// if (exception.TargetSite != null && exception.TargetSite.DeclaringType != null
// && exception.TargetSite.DeclaringType.FullName == "System.Web.Http.Dispatcher.HttpRoutingDispatcher"
// && exception.TargetSite.Name == "SendAsync")
// {
// //This is the bug, so send a 404 instead
// const string NoRouteMatchedHttpPropertyKey = "MS_NoRouteMatched";
// requestMsg.Properties.Add(NoRouteMatchedHttpPropertyKey, true);
// responseMsg = requestMsg.CreateErrorResponse(
// HttpStatusCode.NotFound,
// String.Format("No HTTP resource was found that matches the request URI '{0}'.", requestMsg.RequestUri));
// }
// else
// {
// responseMsg = CreateResponseMessageFromException(exception);
// }
// }
// catch (Exception exception)
// {
// responseMsg = CreateResponseMessageFromException(exception);
// }
// if (responseMsg == null)
// {
// //TODO: Not good, Log this
// //TODO: derive exception from RestBus.Exceptions class
// responseMsg = CreateResponseMessageFromException(new ApplicationException("Unable to get response"));
// }
// }
// finally
// {
// Thread.CurrentPrincipal = originalPrincipal;
// }
//}
//Send Response
try
{
//TODO: Why can't the subscriber append the subscriber id itself from within sendresponse
subscriber.SendResponse(restbusContext, MessageHelpers.ToHttpResponse(responseMsg, msg));
}
catch
{
//TODO: Log SendResponse error
}
}
public void SendResponse(MessageContext context, HttpResponsePacket response )
{
if (disposed) throw new ObjectDisposedException(GetType().FullName);
var dispatch = context.Dispatch as MessageDispatch;
if (dispatch != null)
{
//Ack request
if(Settings.AckBehavior != SubscriberAckBehavior.Automatic && dispatch.Consumer.Model.IsOpen)
{
dispatch.Consumer.Model.BasicAck(dispatch.Delivery.DeliveryTag, false);
//NOTE: The call above takes place in different threads silmultaneously
//In which case multiple threads will be using the same channel at the same time.
//It's okay in this case, because transmissions within a channel are synchronized, as seen in:
//https://github.com/rabbitmq/rabbitmq-dotnet-client/blob/f16c093f6409e11d9d77115038cb224eb39468ec/projects/client/RabbitMQ.Client/src/client/impl/ModelBase.cs#L459
//and
//https://github.com/rabbitmq/rabbitmq-dotnet-client/blob/f16c093f6409e11d9d77115038cb224eb39468ec/projects/client/RabbitMQ.Client/src/client/impl/SessionBase.cs#L177
}
}
//Exit method if no replyToQueue was specified.
if (String.IsNullOrEmpty(context.ReplyToQueue)) return;
if (_subscriberPool.Connection == null)
{
//TODO: Log this -- it technically shouldn't happen. Also translate to a HTTP Unreachable because it means StartCallbackQueueConsumer didn't create a connection
throw new ApplicationException("This is Bad");
}
//Add/Update Subscriber-Id header
response.Headers[Common.Shared.SUBSCRIBER_ID_HEADER] = subscriberIdHeader;
//Send response
var pooler = _subscriberPool;
AmqpModelContainer model = null;
try
{
model = pooler.GetModel(ChannelFlags.None);
BasicProperties basicProperties = new BasicProperties { CorrelationId = context.CorrelationId };
model.Channel.BasicPublish(String.Empty,
context.ReplyToQueue,
basicProperties,
response.Serialize());
}
finally
{
if(model != null)
{
model.Close();
}
}
}
