mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
50 lines
1.6 KiB
Ruby
50 lines
1.6 KiB
Ruby
module ActionDispatch
|
|
# Provide callbacks to be executed before and after the request dispatch.
|
|
#
|
|
# It also provides a to_prepare callback, which is performed in all requests
|
|
# in development by only once in production and notification callback for async
|
|
# operations.
|
|
#
|
|
class Callbacks
|
|
include ActiveSupport::Callbacks
|
|
|
|
define_callbacks :call, :rescuable => true
|
|
define_callbacks :prepare, :scope => :name
|
|
|
|
# Add a preparation callback. Preparation callbacks are run before every
|
|
# request in development mode, and before the first request in production mode.
|
|
#
|
|
# If a symbol with a block is given, the symbol is used as an identifier.
|
|
# That allows to_prepare to be called again with the same identifier to
|
|
# replace the existing callback. Passing an identifier is a suggested
|
|
# practice if the code adding a preparation block may be reloaded.
|
|
def self.to_prepare(*args, &block)
|
|
if args.first.is_a?(Symbol) && block_given?
|
|
define_method :"__#{args.first}", &block
|
|
set_callback(:prepare, :"__#{args.first}")
|
|
else
|
|
set_callback(:prepare, *args, &block)
|
|
end
|
|
end
|
|
|
|
def self.before(*args, &block)
|
|
set_callback(:call, :before, *args, &block)
|
|
end
|
|
|
|
def self.after(*args, &block)
|
|
set_callback(:call, :after, *args, &block)
|
|
end
|
|
|
|
def initialize(app, prepare_each_request = false)
|
|
@app, @prepare_each_request = app, prepare_each_request
|
|
_run_prepare_callbacks
|
|
end
|
|
|
|
def call(env)
|
|
_run_call_callbacks do
|
|
_run_prepare_callbacks if @prepare_each_request
|
|
@app.call(env)
|
|
end
|
|
end
|
|
end
|
|
end
|