require 'action_dispatch/http/request' require 'action_dispatch/middleware/exception_wrapper' require 'active_support/deprecation' module ActionDispatch # This middleware rescues any exception returned by the application # and wraps them in a format for the end user. class ShowExceptions RESCUES_TEMPLATE_PATH = File.join(File.dirname(__FILE__), 'templates') FAILSAFE_RESPONSE = [500, {'Content-Type' => 'text/html'}, ["

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."]] class << self def rescue_responses ActiveSupport::Deprecation.warn "ActionDispatch::ShowExceptions.rescue_responses is deprecated. " \ "Please configure your exceptions using a railtie or in your application config instead." ExceptionWrapper.rescue_responses end def rescue_templates ActiveSupport::Deprecation.warn "ActionDispatch::ShowExceptions.rescue_templates is deprecated. " \ "Please configure your exceptions using a railtie or in your application config instead." ExceptionWrapper.rescue_templates end end def initialize(app, consider_all_requests_local = nil) ActiveSupport::Deprecation.warn "Passing consider_all_requests_local option to ActionDispatch::ShowExceptions middleware no longer works" unless consider_all_requests_local.nil? @app = app end def call(env) begin response = @app.call(env) rescue Exception => exception raise exception if env['action_dispatch.show_exceptions'] == false end response ? response : render_exception_with_failsafe(env, exception) end private # Define this method because some plugins were monkey patching it. # Remove this after 3.2 is out with the other deprecations in this class. def status_code(*) end def render_exception_with_failsafe(env, exception) render_exception(env, exception) rescue Exception => failsafe_error $stderr.puts "Error during failsafe response: #{failsafe_error}\n #{failsafe_error.backtrace * "\n "}" FAILSAFE_RESPONSE end def render_exception(env, exception) wrapper = ExceptionWrapper.new(env, exception) status = wrapper.status_code locale_path = "#{public_path}/#{status}.#{I18n.locale}.html" if I18n.locale path = "#{public_path}/#{status}.html" if locale_path && File.exist?(locale_path) render(status, File.read(locale_path)) elsif File.exist?(path) render(status, File.read(path)) else render(status, '') end end def render(status, body) [status, {'Content-Type' => "text/html; charset=#{Response.default_charset}", 'Content-Length' => body.bytesize.to_s}, [body]] end # TODO: Make this a middleware initialization parameter once # we removed the second option (which is deprecated) def public_path defined?(Rails.public_path) ? Rails.public_path : 'public_path' end end end