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module ActionController #:nodoc:
# Actions that fail to perform as expected throw exceptions. These
# exceptions can either be rescued for the public view (with a nice
# user-friendly explanation) or for the developers view (with tons of
# debugging information). The developers view is already implemented by
# the Action Controller, but the public view should be tailored to your
# specific application.
#
# The default behavior for public exceptions is to render a static html
# file with the name of the error code thrown. If no such file exists, an
# empty response is sent with the correct status code.
#
# You can override what constitutes a local request by overriding the
# <tt>local_request?</tt> method in your own controller. Custom rescue
# behavior is achieved by overriding the <tt>rescue_action_in_public</tt>
# and <tt>rescue_action_locally</tt> methods.
module Rescue
def self.included(base) #:nodoc:
base.send :include, ActiveSupport::Rescuable
base.extend(ClassMethods)
base.class_eval do
alias_method_chain :perform_action, :rescue
end
end
module ClassMethods
def rescue_action(env)
exception = env.delete('action_dispatch.rescue.exception')
request = ActionDispatch::Request.new(env)
response = ActionDispatch::Response.new
new.process(request, response, :rescue_action, exception).to_a
end
end
protected
# Exception handler called when the performance of an action raises
# an exception.
def rescue_action(exception)
rescue_with_handler(exception) || raise(exception)
end
private
def perform_action_with_rescue
perform_action_without_rescue
rescue Exception => exception
rescue_action(exception)
end
end
end
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