def url_for(self, attr=None, filter_value=None,
            service_type=None, endpoint_type="publicURL",
            service_name=None, volume_service_name=None):
        """Fetches the public URL from the given service for
        a particular endpoint attribute. If none given, returns
        the first. See tests for sample service catalog."""
        matching_endpoints = []
        # We don't always get a service catalog back ...
        if "serviceCatalog" not in self.catalog["access"]:
            return None

        # Full catalog ...
        catalog = self.catalog["access"]["serviceCatalog"]
        for service in catalog:
            if service.get("type") != service_type:
                continue
            endpoints = service["endpoints"]
            for endpoint in endpoints:
                if not filter_value or endpoint.get(attr) == filter_value:
                    endpoint["serviceName"] = service.get("name")
                    matching_endpoints.append(endpoint)

        if not matching_endpoints:
            raise exc.EndpointNotFound()
        elif len(matching_endpoints) > 1:
            raise exc.AmbiguousEndpoints(endpoints=matching_endpoints)
        else:
            return matching_endpoints[0][endpoint_type]
def url_for ( self , attr = None , filter_value = None , service_type = None , endpoint_type = "publicURL" , service_name = None , volume_service_name = None ) : matching_endpoints = [ ] if "serviceCatalog" not in self . catalog [ "access" ] : return None catalog = self . catalog [ "access" ] [ "serviceCatalog" ] for service in catalog : if service . get ( "type" ) != service_type : continue endpoints = service [ "endpoints" ] for endpoint in endpoints : if not filter_value or endpoint . get ( attr ) == filter_value : endpoint [ "serviceName" ] = service . get ( "name" ) matching_endpoints . append ( endpoint ) if not matching_endpoints : raise exc . EndpointNotFound ( ) elif len ( matching_endpoints ) > 1 : raise exc . AmbiguousEndpoints ( endpoints = matching_endpoints ) else : return matching_endpoints [ 0 ] [ endpoint_type ]
Fetches the public URL from the given service for
        a particular endpoint attribute. If none given, returns
        the first. See tests for sample service catalog.