module Exceptron
class Dispatcher
FAILSAFE_RESPONSE = [500, {'Content-Type' => 'text/html'},
["500 Internal Server Error" +
"500 Internal Server Error
If you are the administrator of " +
"this website, then please read this web application's log file and/or the " +
"web server's log file to find out what went wrong."]]
def initialize(consider_all_requests_local)
@consider_all_requests_local = consider_all_requests_local
@exception_actions_cache = {}
end
def dispatch(env, exception)
log_error(exception.wrapped_exception)
local = @consider_all_requests_local || ActionDispatch::Request.new(env).local?
controller = exception_controller(local)
action = exception_action(local, controller, exception)
if action
controller.action(action).call(env)
else
FAILSAFE_RESPONSE
end
rescue Exception => failsafe_error
$stderr.puts "Error during failsafe response: #{failsafe_error}"
$stderr.puts failsafe_error.backtrace.join("\n")
FAILSAFE_RESPONSE
end
def exception_controller(local)
local ? Exceptron.local_controller : Exceptron.controller
end
def exception_action(local, controller_klass, exception)
controller = controller_klass.new
@exception_actions_cache[controller_klass] ||= {}
@exception_actions_cache[controller_klass][exception.original_exception.class] ||=
exception.actions.find { |action| controller.available_action?(action) }
end
def log_error(exception)
return unless logger
ActiveSupport::Deprecation.silence do
message = "\n#{exception.class} (#{exception.message}):\n"
message << exception.annoted_source_code.to_s if exception.respond_to?(:annoted_source_code)
message << exception.backtrace.join("\n ")
logger.fatal("#{message}\n\n")
end
end
def logger
defined?(Rails.logger) ? Rails.logger : Logger.new($stderr)
end
end
end