Attaching remote event receiver to a list on host web.

Question

We have an O365 Sharepoint 2013 site. I am trying to create a remote event receiver and attach it to a list on host web instead of appweb. Below are the links that I am referencing to do it: 
http://www.codeproject.com/Articles/636058/Adventures-with-SharePoint-2013-Remote-Event-Recei
http://blogs.msdn.com/b/knewton/archive/2012/12/11/defining-content-in-host-web-from-an-app-for-sharepoint.aspx
They are using 'AppInstalled' event to accomplish this. The method is as follows: get the client context of the host web, get our target list in the host web, get the service url of the remote event receiver using code below: 
string remoteUrl = string.Format("https://{0}/OurRemoteEventReceiver.svc", 
  OperationContext.Current.Channel.LocalAddress.Uri.DnsSafeHost + "/services");
and then use it while adding an event receiver to our target list. A different way of obtaining this remoteUrl is shown in the second post.
When I try to do this I get the below error: 
CorrelationId: eb837c4c-c434-4067-99f4-ad9b38e30d82
3>        ErrorDetail: The remote event receiver callout failed.
3>        ErrorType: Transient
3>        ErrorTypeName: Intermittent
3>        ExceptionMessage: The server was unable to process the request due to an internal error.  For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from
the <serviceDebug> configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs.
3>        Source: Common
3>        SourceName: Common App Deployment
Also, the 'Grant permissions to the App' window appears when I hit Deploy and immediately goes away before I hit or even see the 'Trust it' button. Then, after a while I get the above error in output window. This happens whenever I add the 'AppEventReceiver.svc'
by selecting 'AppInstalled' property to True and then write any code(or even not write any code) in it that targets the host web. Any suggestions please?

Answer 1

Hi,
We can add the code snippet below in the "App Installed" event handler.
EventReceiverDefinitionCreationInformation eventReceiver = new EventReceiverDefinitionCreationInformation();
eventReceiver.EventType = EventReceiverType.ItemAdding;
eventReceiver.ReceiverAssembly = Assembly.GetExecutingAssembly().FullName;
eventReceiver.ReceiverClass = "OurRemoteEventReceiver";
eventReceiver.ReceiverName = "OurRemoteEventReceiver";
eventReceiver.ReceiverUrl = "http://xxx/OurRemoteEventReceiver.svc";
eventReceiver.SequenceNumber = 1000;
Web web = SPutil.getSP("http://sub.domain.com/sites/apps");
List targetList = web.Lists.GetByTitle("Host Web List");
targetList.EventReceivers.Add(eventReceiver);
web.Context.ExecuteQuery();
You will need to include an additional .NET class as well:
using System.Reflection;
If the problem still existed, I  suggest to debug your remote event receiver project to find the cause of the error. The link below for your reference:
http://blogs.msdn.com/b/officeapps/archive/2013/01/03/debugging-remote-event-receivers-with-visual-studio.aspx
More information:
Add list item properties with a remote event receiver
http://code.msdn.microsoft.com/office/SharePoint-2013-Add-list-2c6e71e0
Best Regards,
Dennis Guo
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