Question

I have the following problem. I am using Entity Framework to connect to a SQL Azure and that works(I tested it in a Test Project).

But when i try to get it through WCF RESTful service it throws Error 504.

My Operation Contract:

[ServiceContract]
public interface IService
{
    [OperationContract]
    [WebGet(UriTemplate = "/Artikli", ResponseFormat = WebMessageFormat.Json)]
    IEnumerable<Artikal> GetArtikli();
}

Implementation of [ServiceContract] :

public class Service : IService
{
    public IEnumerable<Artikal> GetArtikli()
    {
        using (var context = new CijenolomciEntities())
        {
            var result = context.Artikals.ToList();
            result.ForEach(a => context.Detach(a));
            return result;
        }

    }
}

The whole thing is hosted on local IIS. I use Fiddler, an what it says when i try to reach

http://localhost:17916/Service.svc/Artikli 

is

[Fiddler] ReadResponse() failed: The server did not return a response for this request.

The WCF App.Config looks like:

    <?xml version="1.0"?>
    <configuration>
        <connectionStrings>
            <add name="CijenolomciEntities" connectionString="My_Connection_String" providerName="System.Data.EntityClient" />
        </connectionStrings>

        <system.web>
        <compilation debug="true" targetFramework="4.0" />
        </system.web>

        <system.serviceModel>
            <protocolMapping>
                <add scheme="http" binding="webHttpBinding" />
            </protocolMapping>
            <behaviors>
                <endpointBehaviors>
                    <behavior>
                        <webHttp />
                    </behavior>
                </endpointBehaviors>
            <serviceBehaviors>
            <behavior>
                <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
                <serviceMetadata httpGetEnabled="true"/>
                <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                <serviceDebug includeExceptionDetailInFaults="false"/>
            </behavior>
            </serviceBehaviors>
        </behaviors>
        <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
        </system.serviceModel>

        <system.webServer>
        <modules runAllManagedModulesForAllRequests="true"/>
        </system.webServer>

    </configuration>

EDIT:
When i try to access URL through browser i get the following:

Request Error

The server encountered an error processing the request. See server logs for more details.

Answer 1

Try to enable Tracing and see if your request is exceeding the default values due to which you are getting a timeout error.

Inspect the trace log for detailed error on why it is failing and then appropriately perform the needed steps to increase either the timeout values or the default size limits