/usr/lib/ruby/vendor_ruby/action_dispatch/middleware/reloader.rb is in ruby-actionpack 2:4.2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | require 'active_support/deprecation/reporting'
module ActionDispatch
# ActionDispatch::Reloader provides prepare and cleanup callbacks,
# intended to assist with code reloading during development.
#
# Prepare callbacks are run before each request, and cleanup callbacks
# after each request. In this respect they are analogs of ActionDispatch::Callback's
# before and after callbacks. However, cleanup callbacks are not called until the
# request is fully complete -- that is, after #close has been called on
# the response body. This is important for streaming responses such as the
# following:
#
# self.response_body = lambda { |response, output|
# # code here which refers to application models
# }
#
# Cleanup callbacks will not be called until after the response_body lambda
# is evaluated, ensuring that it can refer to application models and other
# classes before they are unloaded.
#
# By default, ActionDispatch::Reloader is included in the middleware stack
# only in the development environment; specifically, when +config.cache_classes+
# is false. Callbacks may be registered even when it is not included in the
# middleware stack, but are executed only when <tt>ActionDispatch::Reloader.prepare!</tt>
# or <tt>ActionDispatch::Reloader.cleanup!</tt> are called manually.
#
class Reloader
include ActiveSupport::Callbacks
include ActiveSupport::Deprecation::Reporting
define_callbacks :prepare
define_callbacks :cleanup
# Add a prepare callback. Prepare callbacks are run before each request, prior
# to ActionDispatch::Callback's before callbacks.
def self.to_prepare(*args, &block)
unless block_given?
warn "to_prepare without a block is deprecated. Please use a block"
end
set_callback(:prepare, *args, &block)
end
# Add a cleanup callback. Cleanup callbacks are run after each request is
# complete (after #close is called on the response body).
def self.to_cleanup(*args, &block)
unless block_given?
warn "to_cleanup without a block is deprecated. Please use a block"
end
set_callback(:cleanup, *args, &block)
end
# Execute all prepare callbacks.
def self.prepare!
new(nil).prepare!
end
# Execute all cleanup callbacks.
def self.cleanup!
new(nil).cleanup!
end
def initialize(app, condition=nil)
@app = app
@condition = condition || lambda { true }
@validated = true
end
def call(env)
@validated = @condition.call
prepare!
response = @app.call(env)
response[2] = ::Rack::BodyProxy.new(response[2]) { cleanup! }
response
rescue Exception
cleanup!
raise
end
def prepare! #:nodoc:
run_callbacks :prepare if validated?
end
def cleanup! #:nodoc:
run_callbacks :cleanup if validated?
ensure
@validated = true
end
private
def validated? #:nodoc:
@validated
end
end
end
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