Silverlight 4 application connecting to WCF Service fails

Question

Been working on a Silverlight application which connects to a WCF Service on our server. I am using .NET 4.0 for development. Everything works fine locally, but I tried deploying the WCF Service on our server and it does not work.

The service is running fine, I checked by entering the URL in the browser. But whenever I make a call from my Silverlight application it fails with the error:

System.ServiceModel.CommunicationException: The remote server returned an error: NotFound.

The detailed error is given below with my Web.Config file. I used fiddler to check the messages and I could see the response from the server contains the text.

a:FailedAuthentication. Access Denied.

What can I do to solve this? The problem is that my hosting server does not allow Windows Authentication to be turned on in IIS. Could not find the settings for that. I am using godaddy windows hosting.

Any pointers?

Web.Config:

  <authentication mode="Windows"/> <customErrors mode="Off"/> <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web> <system.serviceModel> <serviceHostingEnvironment multipleSiteBindingsEnabled="true"></serviceHostingEnvironment> <services> <service name="WarpArtOnline.Service1" behaviorConfiguration="WarpArtOnline.Service1Behavior"> <endpoint binding="basicHttpBinding" bindingConfiguration="MaxSizeBinding" contract="WarpArtOnline.IService1"> <identity> <dns value="localhost" /> </identity> </endpoint> <!--<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>--> </service> </services> <bindings> <basicHttpBinding> <binding name="MaxSizeBinding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" /> <security mode="None"> <!--<transport clientCredentialType="Windows"/>--> <!--<transport clientCredentialType="None" proxyCredentialType="None" realm="" /> <message clientCredentialType="UserName" algorithmSuite="Default" />--> </security> </binding> </basicHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="WarpArtOnline.Service1Behavior"> <serviceMetadata httpGetEnabled="true"/> <serviceDebug includeExceptionDetailInFaults="true"/> <dataContractSerializer maxItemsInObjectGraph="2147483647" /> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> 

Error: {System.ServiceModel.CommunicationException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound. at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) at System.Net.Browser.BrowserHttpWebRequest.<>c_ DisplayClass5.b _4(Object sendState) at System.Net.Browser.AsyncHelper.<>c_ DisplayClass4.b _1(Object sendState) --- End of inner exception stack trace --- at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result) --- End of inner exception stack trace --- at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result) at System.ServiceModel.ClientBase 1.ChannelBase 1.EndInvoke(String methodName, Object[] args, IAsyncResult result) at ImagingSL.WebWarp.Service1Client.Service1ClientChannel.EndwarpImage(IAsyncResult result) at ImagingSL.WebWarp.Service1Client.ImagingSL.WebWarp.IService1.EndwarpImage(IAsyncResult result) at ImagingSL.WebWarp.Service1Client.OnEndwarpImage(IAsyncResult result) at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)} {System.ServiceModel.CommunicationException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound. at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) at System.Net.Browser.BrowserHttpWebRequest.<>c_ DisplayClass5.b _4(Object sendState) at System.Net.Browser.AsyncHelper.<>c_ DisplayClass4.b _1(Object sendState) --- End of inner exception stack trace --- at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result) --- End of inner exception stack trace --- at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result) at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result) at System.ServiceModel.ClientBase 1.ChannelBase 1.EndInvoke(String methodName, Object[] args, IAsyncResult result) at ImagingSL.WebWarp.Service1Client.Service1ClientChannel.EndwarpImage(IAsyncResult result) at ImagingSL.WebWarp.Service1Client.ImagingSL.WebWarp.IService1.EndwarpImage(IAsyncResult result) at ImagingSL.WebWarp.Service1Client.OnEndwarpImage(IAsyncResult result) at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)}

Answer 1

Have you modified the clientaccesspolicy.xml file? You need to enable cross domain access in this file.Refer to this Making a Service Available Across Domain Boundaries

Answer 2

Are you using a ServiceReferences.ClientConfig file in your Silverlight project? If so have you checked all the endpoint settings?