This middleware is responsible for logging exceptions and showing a debugging page in case the request is local.

Namespace
Methods
C
N
Constants
RESCUES_TEMPLATE_PATH = File.expand_path("../templates", __FILE__)
 
Class Public methods
new(app, routes_app = nil, response_format = :default)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 51
def initialize(app, routes_app = nil, response_format = :default)
  @app             = app
  @routes_app      = routes_app
  @response_format = response_format
end
Instance Public methods
call(env)

Source: show | on GitHub 

# File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 57
def call(env)
  request = ActionDispatch::Request.new env
  _, headers, body = response = @app.call(env)

  if headers["X-Cascade"] == "pass"
    body.close if body.respond_to?(:close)
    raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
  end

  response
rescue Exception => exception
  raise exception unless request.show_exceptions?
  render_exception(request, exception)
end