Class: ExceptionNotification::Rack

Inherits:
Object
  • Object
show all
Defined in:
lib/exception_notification/rack.rb

Defined Under Namespace

Classes: CascadePassException

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Rack

Returns a new instance of Rack.



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# File 'lib/exception_notification/rack.rb', line 7

def initialize(app, options = {})
  @app = app

  ExceptionNotifier.tap do |en|
    en.ignored_exceptions = options.delete(:ignore_exceptions) if options.key?(:ignore_exceptions)
    en.error_grouping = options.delete(:error_grouping) if options.key?(:error_grouping)
    en.error_grouping_period = options.delete(:error_grouping_period) if options.key?(:error_grouping_period)
    en.notification_trigger = options.delete(:notification_trigger) if options.key?(:notification_trigger)

    if options.key?(:error_grouping_cache)
      en.error_grouping_cache = options.delete(:error_grouping_cache)
    elsif defined?(Rails) && Rails.respond_to?(:cache)
      en.error_grouping_cache = Rails.cache
    end
  end

  if options.key?(:ignore_if)
    rack_ignore = options.delete(:ignore_if)
    ExceptionNotifier.ignore_if do |exception, opts|
      opts.key?(:env) && rack_ignore.call(opts[:env], exception)
    end
  end

  if options.key?(:ignore_notifier_if)
    rack_ignore_by_notifier = options.delete(:ignore_notifier_if)
    rack_ignore_by_notifier.each do |notifier, proc|
      ExceptionNotifier.ignore_notifier_if(notifier) do |exception, opts|
        opts.key?(:env) && proc.call(opts[:env], exception)
      end
    end
  end

  ExceptionNotifier.ignore_crawlers(options.delete(:ignore_crawlers)) if options.key?(:ignore_crawlers)

  @ignore_cascade_pass = options.delete(:ignore_cascade_pass) { true }

  options.each do |notifier_name, opts|
    ExceptionNotifier.register_exception_notifier(notifier_name, opts)
  end
end

Instance Method Details

#call(env) ⇒ Object



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# File 'lib/exception_notification/rack.rb', line 48

def call(env)
  _, headers, = response = @app.call(env)

  if !@ignore_cascade_pass && headers['X-Cascade'] == 'pass'
    msg = "This exception means that the preceding Rack middleware set the 'X-Cascade' header to 'pass' -- in " \
          'Rails, this often means that the route was not found (404 error).'
    raise CascadePassException, msg
  end

  response
rescue Exception => e
  env['exception_notifier.delivered'] = true if ExceptionNotifier.notify_exception(e, env: env)

  raise e unless e.is_a?(CascadePassException)

  response
end