How to add cross domain support to WCF service

[Gauravj]

I'm trying to allow POST requests from my javascript app hosted at localhost:80 to a WCF REStful service hosted at a different port, but somehow it doesn't work. I've tried adding custom properties to the header, as well as adding it programatically in my service's \[code\]JSONData\[/code\] method but it doesn't work. What is the proper approach here ? This is my interface :\[code\]namespace RestService{ public class RestServiceImpl : IRestServiceImpl { #region IRestServiceImpl Members public string JSONData() { HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*"); return "Your POST request"; } #endregion }}\[/code\]and the service code :\[code\]using System.ServiceModel;using System.ServiceModel.Web;using System.Web.Script.Services;namespace RestService{ [ServiceContract] public interface IRestServiceImpl { [OperationContract] [ScriptMethod] [WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare, UriTemplate = "export")] string JSONData(); }}\[/code\]And finally the config :\[code\]<?xml version="1.0"?><configuration> <system.web> <compilation debug="true" targetFramework="4.0" /> </system.web> <system.serviceModel> <services> <service name="RestService.RestServiceImpl" behaviorConfiguration="ServiceBehaviour"> <endpoint address ="" binding="webHttpBinding" contract="RestService.IRestServiceImpl" behaviorConfiguration="web"> </endpoint> </service> </services> <behaviors> <serviceBehaviors> <behavior name="ServiceBehaviour"> <serviceMetadata httpGetEnabled="true"/> <serviceDebug includeExceptionDetailInFaults="false"/> </behavior> </serviceBehaviors> <endpointBehaviors> <behavior name="web"> <webHttp/> </behavior> </endpointBehaviors> </behaviors> <serviceHostingEnvironment multipleSiteBindingsEnabled="true" /> </system.serviceModel> <system.webServer> <modules runAllManagedModulesForAllRequests="true"/> <httpProtocol> <customHeaders> <add name="Access-Control-Allow-Origin" value="http://stackoverflow.com/questions/14047754/*" /> </customHeaders></httpProtocol> </system.webServer></configuration>\[/code\]