Importing ASMX Web Service metadata to WCF Endpoint - wcf

Question

I am interested in impersonating well-known Web Services and Wcf Services for integration test purposes. To this end, I would like to capture service metadata, auto-generate service stubs, and host service stubs in a self-hosted environment.
Following this article here, I am able to obtain remote Wcf Service metadata and generate contracts. However, I am having some difficulty doing the same for remote Asmx Web Services.
I have a set of mickey-mouse solutions for vetting this out.
My Asmx solution contains a default "Hello World" web service, found below
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
public class SimpleAsmxService : System.Web.Services.WebService
{
[WebMethod]
public string HelloWorld () { return "Hello World"; }
}
My Wcf solution contains a default "Hello World" service, also found below
[ServiceContract]
public interface ISimpleWcfService
{
[OperationContract]
string GetData(int value);
[OperationContract]
CompositeType GetDataUsingDataContract(CompositeType composite);
}
[DataContract]
public class CompositeType
{
[DataMember]
public bool BoolValue { get; set; }
[DataMember]
public string StringValue { get; set; }
}
public class SimpleWcfService : ISimpleWcfService
{
public string GetData(int value)
{
return string.Format("You entered: {0}", value);
}
public CompositeType GetDataUsingDataContract(CompositeType composite)
{
if (composite.BoolValue)
{
composite.StringValue += "Suffix";
}
return composite;
}
}
Finally, the little console-that-could looks like
class Program
{
public const string UrlWcf =
"http://localhost:8731/Design_Time_Addresses/SimpleWcfService/mex";
public const string UrlAsmx =
"http://localhost:1803/SimpleAsmxService.asmx?WSDL";
static void Main(string[] args)
{
EndpointAddress mexAddress = new EndpointAddress (UrlWcf);
MetadataExchangeClient mexClient =
new MetadataExchangeClient (mexAddress);
mexClient.ResolveMetadataReferences = true;
// NOTE: blows up if we use UrlAsmx
MetadataSet metaSet = mexClient.GetMetadata ();
WsdlImporter importer = new WsdlImporter (metaSet);
Collection<ContractDescription> contracts =
importer.ImportAllContracts();
}
}
It seems to me that I should be able to pull Wsdl from a well-known Asmx Web Service and generate contracts [and from contracts to code], but cannot seem to contort the preceding sample to do so. Any help would be much appreciated,
Thanks!
NOTE: the error generated when invoking MetadataSet metaSet = mexClient.GetMetadata(); above is a System.InvalidOperationException with message of
Metadata contains a reference that cannot be resolved : 'http://localhost:1803/SimpleAsmxService.asmx?WSDL'
With a System.InvalidOperationException inner exception with message of
<?xml version="1.0" encoding="utf-16"?>
<Fault xmlns="http://www.w3.org/2003/05/soap-envelope">
<Code>
<Value>Sender</Value>
</Code>
<Reason>
<Text xml:lang="en">
System.Web.Services.Protocols.SoapException: Unable to handle request without a valid action parameter. Please supply a valid soap action.
at System.Web.Services.Protocols.Soap12ServerProtocolHelper.RouteRequest()
at System.Web.Services.Protocols.SoapServerProtocol.RouteRequest(SoapServerMessage message)
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response)
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)
</Text>
</Reason>
</Fault>

Answer 1

The way to get it to work with an ASMX web service is to specify the MetadataExchangeClientMode
...
MetadataExchangeClient mexClient =
new MetadataExchangeClient (new Uri(), MetadataExchangeClientMode.HttpGet);
...
using MetadataExchangeClientMode.HttpGet for your ASMX services
and MetadataExchangeClientMode.MetadataExchange for your WCF services.