Security Exception

Question

Hi

I am getting the fcllowing on an async callback Running on the .net framework 4.0

 

{System.InvalidOperationException: An error occurred while processing this request. ---> System.Security.SecurityException ---> System.Security.SecurityException: Security error.
   at System.Net.Browser.ClientHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
   at System.Net.Browser.ClientHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
   at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)
   --- End of inner exception stack trace ---
   at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
   at System.Net.Browser.ClientHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Data.Services.Http.ClientHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Data.Services.Client.QueryResult.AsyncEndGetResponse(IAsyncResult asyncResult)
   --- End of inner exception stack trace ---
   at System.Data.Services.Client.BaseAsyncResult.EndExecute[T](Object source, String method, IAsyncResult asyncResult)
   at System.Data.Services.Client.QueryResult.EndExecute[TElement](Object source, IAsyncResult asyncResult)
   at System.Data.Services.Client.DataServiceRequest.EndExecute[TElement](Object source, DataServiceContext context, IAsyncResult asyncResult)
   at System.Data.Services.Client.DataServiceQuery`1.EndExecute(IAsyncResult asyncResult)
   at PMSDash.FiltersGenericModule.ViewModels.FiltersGenericViewMainViewModel.<>c__DisplayClass6.<OnloadPrintSitesDataComplete>b__3()}

 

 

What is the most likely cause for this?

Answer 1

What is the error message? It's been thrown by the HttpWebReqeust class - outside of our client library. We may still be able to help you if you show us the error message though.

 

Regards,

PQ

---

Peter Q. http://blogs.msdn.com/peter_qian

Answer 2

Hi,

This might be a cross-domain access issue. Could you try running a network tracing tool during the repro (like fiddler - www.fiddler2.com).

If the request goes to a different domain then the one on which the silverlight application is hosted, the target domain will need to enable cross domain access.

Thanks,

---

Vitek Karas [MSFT]

Answer 3

Hi all,

i figured out that it does not work because of cross-domain access, but cross-domain access policy is enabled on the service side.
When I call the same service within SL3 build it works. With SL4 build it does not work.


Damir

Answer 4

Hi Guys,

the problem seems to be SOAPAction header in the policy file. Silverlight 4 knows, that WCD DataSErvice call is not a SOAP call :)

I post the solution here:
http://developers.de/blogs/damir_dobric/archive/2010/04/22/silverlight-4-invalidoperationexception-securityexception-wcf-dataservices.aspx

Damir