Wcf – How to change the default schemalocation in wsdl file of WCf Service

wcfwcf-binding

Following is the wsdl file of my service:

    <wsdl:types>
      <xsd:schema targetNamespace="http://tempuri.org/Imports">
      <xsd:import schemaLocation="http://localhost:3789/VideoUpload.svc?xsd=xsd0" namespace="http://tempuri.org/" /> 
      <xsd:import schemaLocation="http://localhost:3789/VideoUpload.svc?xsd=xsd1" namespace="http://schemas.microsoft.com/2003/10/Serialization/" /> 
      <xsd:import schemaLocation="http://localhost:3789/VideoUpload.svc?xsd=xsd2" namespace="http://schemas.datacontract.org/2004/07/UploadVideoProtocol" /> 
      </xsd:schema>
    </wsdl:types>
-----
<wsdl:definitions>
<wsdl:service name="VideoUpload">
<wsdl:port name="BasicHttpBinding_IVideoUpload" binding="tns:BasicHttpBinding_IVideoUpload">
  <soap:address location="http://localhost:3789/VideoUpload.svc" /> 
  </wsdl:port>
  </wsdl:service>
</wsdl:definitions>

In the above, I could change the namespace by specifying the custom namespace inside the code in service contract and behavior.

But I need to change the endpoint address specified in the schema location,

schemaLocation="http://localhost:3789/VideoUpload.svc?xsd=xsd0"

To my own defined endpoint address as:

schemaLocation="http://myservice.com:8080/VideoUpload.svc?xsd=xsd0"

What is the procedure to achieve this? what has to be mentioned in the code to change the default endpoint generated? Can anyone please help me on this?

Best Answer

You could dynamically update the WCF endpoint address in the WSDL meta data by adding a new behavior that implements "IWsdlExportExtension"

public class HostNameAddressBehavior : Attribute, IWsdlExportExtension, IEndpointBehavior, IServiceBehavior
{
    public void AddBindingParameters(ServiceEndpoint endpoint,
        BindingParameterCollection bindingParameters)
    {
    }

    public void ApplyClientBehavior(ServiceEndpoint endpoint,
        ClientRuntime clientRuntime)
    {
    }

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint,
        EndpointDispatcher endpointDispatcher)
    {

    }

    public void Validate(ServiceEndpoint endpoint)
    {
    }

    public void AddBindingParameters(ServiceDescription serviceDescription,
        ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints,
        BindingParameterCollection bindingParameters)
    {
    }

    public void ApplyDispatchBehavior(ServiceDescription serviceDescription,
        ServiceHostBase serviceHostBase)
    {
    }

    public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
    }

    public void ExportContract(WsdlExporter exporter,
        WsdlContractConversionContext context)
    {
    }

    /// <summary>
    /// Overwrite service meta data
    /// </summary>
    /// <param name="exporter"></param>
    /// <param name="context"></param>
    public void ExportEndpoint(WsdlExporter exporter, WsdlEndpointConversionContext context)
    {
        var address = "YOUR_ENDPOINT";

        context.Endpoint.Address = new System.ServiceModel.EndpointAddress(address);

        XmlSchemaSet schemaSet = exporter.GeneratedXmlSchemas;

        foreach (System.Web.Services.Description.ServiceDescription wsdl in exporter.GeneratedWsdlDocuments)
        {
            foreach (XmlSchema schema in wsdl.Types.Schemas)
            {
                ChangeSchemaLocation(schemaSet, schema, address);
            }
        }
    }

    /// <summary>
    /// Update XSD location
    /// </summary>
    /// <param name="xmlSchemaSet"></param>
    /// <param name="xsdDoc"></param>
    /// <param name="address"></param>
    private void ChangeSchemaLocation(XmlSchemaSet xmlSchemaSet, XmlSchema xsdDoc, string address)
    {
        foreach (XmlSchemaExternal external in xsdDoc.Includes)
        {
            if ((external != null) && string.IsNullOrEmpty(external.SchemaLocation))
            {
                string str = (external is XmlSchemaImport) ? ((XmlSchemaImport)external).Namespace : xsdDoc.TargetNamespace;
                foreach (XmlSchema schema in xmlSchemaSet.Schemas(str ?? string.Empty))
                {
                    if (schema != xsdDoc)
                    {
                        external.SchemaLocation = address + "/?xsd=xsd0"; // set the location;
                        break;
                    }
                }
                continue;
            }
        }
    }
}

Add your new behavior by code or in the config file.

By code:

var endpoint = listener.ServiceHost.Description.Endpoints.First();
endpoint.Behaviors.Add(new HostNameAddressBehavior());

OR

By Config:

Create extension:

    public class HostNameAddressBehaviorExtension : BehaviorExtensionElement
{
    public override Type BehaviorType
    {
        get
        {
            return typeof(HostNameAddressBehavior);
        }
    }

    protected override object CreateBehavior()
    {
        return new HostNameAddressBehavior();
    }
}

Then add:

<extensions>
    <behaviorExtensions>
      <add name="hostNameAddress" type="YourService.HostNameAddressBehaviorExtension, YourService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
    </behaviorExtensions>
  </extensions>
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