Filter payload that passes to the transformer in Webservice Proxy pattern in Mule ESB

Question

When using a web service proxy pattern in Mule, you have the ability to pass the message through 1 or more transformers. Is there anyway to avoid passing ?Wsdl gets or other messages filtered on Content-Type for example? My transformer is manipulating the XML payload prior to passing it off to the web service, but I've found my wsdl calls are also being processed by the transformer and failing.

I've put a check in my transformer code, but this doesn't seem like the right way to go about solving this.

if(message.getOriginalPayload().toString().endsWith("wsdl")||!(xmlString.startsWith("<") && xmlString.endsWith(">"))){return message; }

The Proxy config:

<pattern:web-service-proxy name="SR-Proxy" 
    doc:name="SR-Proxy" 
    transformer-refs="enrichPayloadWithSFSession" 
    wsdlFile="service/SR_Webservice.wsdl">
<http:inbound-endpoint exchange-pattern="request-response" host="${hostname}" port="${http.port}" path="service/SRProxy" doc:name="HTTP" />
<https:outbound-endpoint exchange-pattern="request-response" address="${sfdc.wsUrl}SR_Webservice" />
</pattern:web-service-proxy>

Answer 1

Use the http.query.string inbound message property to detect the ?wsdl request.

See http://www.mulesoft.org/documentation/display/current/HTTP+Transport+Reference#HTTPTransportReference-HTTPProperties for more information about the available inbound properties you can find in inbound HTTP messages.