This is a Feature Proposal

In handling an incoming HTTP event, I need my handler to effectively make requests to "relative" urls, which it must do by constructing a new request URL relative to the incoming request URL. The current HTTP event only reports the subscription path that was answered, and does not include either the hostname, full request URL, or the gateway URL.

1. A handler is mapped to /login
2. The handler needs to make a request to /users
3. The handler receives an event in response to a request to http://my-gateway.example/xyz/login
4. The event should have fields for both the path: "/login" and the gatewayUrl: "http://my-gateway.example/xyz/"
5. The handler uses the gateway url and adds /users to make a request to http://my-gateway.example/xyz/users