Accessing self hosted WCF service from Silverlight 4 -

i have self hosted wcf 4 service, catering same contract via basichttpbinding silverlight 4 clients , wshttpbinding others. code short , simple , provided here.

i following error when trying access service method wcf:

message=an error occurred while trying make request uri http://localhost:8008/wcf4silverlight.myservice/sl. due attempting access service in cross-domain way without proper cross-domain policy in place, or policy unsuitable soap services. may need contact owner of service publish cross-domain policy file , ensure allows soap-related http headers sent. error may caused using internal types in web service proxy without using internalsvisibletoattribute attribute. please see inner exception more details.

i have method, getclientaccesspolicy() serving cross-domain policy using webget attribute, , kind of sure there problem getting exposed properly. insight problem highly appreciated. if type http://localhost:8008/wcf4silverlight.myservice/clientaccesspolicy.xml in browser, xml same, call silverlight fails above error.

here code wcf service:

 namespace wcf4silverlight {     [servicecontract(sessionmode = sessionmode.notallowed)]     public interface iclientaccesspolicy      {          [operationcontract, webget(uritemplate = "/clientaccesspolicy.xml")]             stream getclientaccesspolicy();     } } namespace wcf4silverlight { public class myservice: imyservice, iclientaccesspolicy { public stream getclientaccesspolicy()  {  const string result = @"<?xml version=""1.0"" encoding=""utf-8""?> <access-policy>     <cross-domain-access>         <policy>             <allow-from http-request-headers=""*"">                 <domain uri=""*""/>             </allow-from>             <grant-to>                 <resource path=""/"" include-subpaths=""true""/>             </grant-to>         </policy>     </cross-domain-access> </access-policy>";  if (weboperationcontext.current != null)                 weboperationcontext.current.outgoingresponse.contenttype = "application/xml"; return new memorystream(encoding.utf8.getbytes(result));  } } //other service methods.... } 

here code publishes service:

class program {  static void main(string[] args)  {   servicehost myservicehost = new servicehost(typeof(myservice));   myservicehost.open();    //wait client action.    myservicehost.close();  } } 

here app.config wcf service host:

<service name="wcf4silverlight.myservice" behaviorconfiguration="myservicebehavior">  <host>    <baseaddresses>   <add baseaddress="http://localhost:8008/myservice/"/>    </baseaddresses>  </host>  <endpoint address="general" binding="wshttpbinding" bindingconfiguration="wshttpbinding_imyservice" contract="wcf4silverlight.imyservice"/>  <endpoint address="sl" binding="basichttpbinding" bindingconfiguration="basichttpbinding_imyservice" contract="wcf4silverlight.imyservice"/>  <endpoint address="" binding="webhttpbinding" bindingconfiguration="webhttpbinding_imyservice" behaviorconfiguration="webhttpbehavior" contract="wcf4silverlight.iclientaccesspolicy" /> </service> 

and here servicereferences.clientconfig silverlight client:

<system.servicemodel>  <bindings>   <basichttpbinding>    <binding name="basichttpbinding_imyservice" maxbuffersize="2147483647"     maxreceivedmessagesize="2147483647">     <security mode="none" />    </binding>   </basichttpbinding>   <custombinding>    <binding name="wshttpbinding_imyservice">     <textmessageencoding messageversion="default" writeencoding="utf-8" />     <httptransport maxreceivedmessagesize="2147483647" maxbuffersize="2147483647" />    </binding>   </custombinding>  </bindings>  <client>   <endpoint address="http://localhost:8008/myservice/sl"    binding="basichttpbinding" bindingconfiguration="basichttpbinding_imyservice"    contract="mywcfservice.imyservice" name="basichttpbinding_imyservice" />  </client> </system.servicemodel> 

this did resolve issue:

1) used fiddler see wcf calls directed. fiddler told calls failing host - http:/localhost:8008 , url - /clientaccesspolicy.xml.

2) created different class clientaccesspolicy implementing iclientaccesspolicy (with webget /clientaccesspolicy.xml).

3) added section in app.config of host new service hosting clientaccesspolicy class. 1 had base address http:/localhost:8008/

    <service name="wcf4silverlight.clientaccesspolicy" behaviorconfiguration="clientaccesspolicybehavior">   <host>     <baseaddresses>    <add baseaddress="http://localhost:8008/"/>     </baseaddresses>   </host>   <endpoint address="" binding="webhttpbinding" bindingconfiguration="webhttpbinding_imyservice" behaviorconfiguration="webhttpbehavior" contract="wcf4silverlight.iclientaccesspolicy" />  </service> 

4) in hosting code, created instance of servicehost , launched new service clientaccesspolicy

servicehost clientaccesspolicyhost = new servicehost(typeof(clientaccesspolicy)); clientaccesspolicyhost.open();  

5) in silverlight client, deleted existing reference wcf , added 1 newly hosted service.

the wcf calls silverlight going through.