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Contents
module Pageflow
# Allow delegating to another Rack app from a controller action.
#
# @api private
module ControllerDelegation
# Abort currently executed controller action, call passed Rack app
# and use its response instead. A block can be passed to mutate
# the response.
def delegate_to_rack_app!(app)
result = app.call(request.env)
yield(*result) if block_given?
throw(:delegate, result)
end
# Override ActionController::Metal#dispatch [1] which returns the
# Rack response triple generated by the controller. Calling
# `delegate_to_rack_app!` aborts execution of the current
# controller action and returns the response of the given Rack app
# instead.
#
# The second argument passed to `throw` is becomes the return
# value of `catch`. If `throw` is not called, `catch` passes the
# return value of its block.
#
# [1] https://github.com/rails/rails/blob/8bec77cc0f1fd47677a331a64f68c5918efd2ca9/actionpack/lib/action_controller/metal.rb#L188
def dispatch(*)
catch(:delegate) { super }
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems