ruby-rack-mount - 0.8.3-3 main

Rack::Mount supports Rack's "X-Cascade" convention to continue trying routes
if the response returns "pass". This allows multiple routes to be nested or
stacked on top of each other. Since the application endpoint can trigger the
router to continue matching, middleware can be used to add arbitrary
conditions to any route. This allows you to route based on other request
attributes, session information, or even data dynamically pulled from a
database.