class ActionDispatch::ShowExceptions
This middleware rescues any exception returned by the application and calls an exceptions app that will wrap it in a format for the end user.
The exceptions app should be passed as parameter on initialization of ShowExceptions. Everytime there is an exception, ShowExceptions will store the exception in env, rewrite the PATH_INFO to the exception status code and call the rack app.
If the application returns a “X-Cascade” pass response, this middleware will send an empty response as result with the correct status code. If any exception happens inside the exceptions app, this middleware catches the exceptions and returns a FAILSAFE_RESPONSE.
Constants
- FAILSAFE_RESPONSE
Public Class Methods
new(app, exceptions_app = nil)
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# File lib/action_dispatch/middleware/show_exceptions.rb, line 39 def initialize(app, exceptions_app = nil) if [true, false].include?(exceptions_app) ActiveSupport::Deprecation.warn "Passing consider_all_requests_local option to ActionDispatch::ShowExceptions middleware no longer works" exceptions_app = nil end if exceptions_app.nil? raise ArgumentError, "You need to pass an exceptions_app when initializing ActionDispatch::ShowExceptions. " "In case you want to render pages from a public path, you can use ActionDispatch::PublicExceptions.new('path/to/public')" end @app = app @exceptions_app = exceptions_app end
Public Instance Methods
call(env)
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# File lib/action_dispatch/middleware/show_exceptions.rb, line 54 def call(env) begin response = @app.call(env) rescue Exception => exception raise exception if env['action_dispatch.show_exceptions'] == false end response || render_exception(env, exception) end
rescue_responses()
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# File lib/action_dispatch/middleware/show_exceptions.rb, line 26 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
rescue_templates()
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# File lib/action_dispatch/middleware/show_exceptions.rb, line 32 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