urlMask

A template to parse service and version fields from a request URL. URL mask allows for routing to multiple App Engine services without having to create multiple Network Endpoint Groups and backend services. For example, the request URLs "foo1-dot-appname.appspot.com/v1" and "foo1-dot-appname.appspot.com/v2" can be backed by the same Serverless NEG with URL mask "-dot-appname.appspot.com/". The URL mask will parse them to { service = "foo1", version = "v1" } and { service = "foo1", version = "v2" } respectively.