title: modifying URL in wso2 esb
body: <p>How can I add a static part in the query endpoint in WSO2 ESB service-proxy?
  I created a pass through proxy to make an external api accessible via wso2 but the GET/POST query are sent to a link like this:</p>
  
  <p><strong><em><a href="http://host:port/services/service_name/car_name?op=CREATE&amp;user=user1" rel="nofollow noreferrer">http://host:port/services/service_name/car_name?op=CREATE&amp;user=user1</a></em></strong></p>
  
  <p>Is the a way to make the parameters part ( ?op=CREATE&amp;user=user1 ) of the url did add automatically without being manually putted and the client just send a GET query to :</p>
  
  <p><strong><em><a href="http://host:port/services/service_name/car_name" rel="nofollow noreferrer">http://host:port/services/service_name/car_name</a></em></strong></p>