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

Methods
C
N
Constants
RESCUES_TEMPLATE_PATH = File.join(File.dirname(__FILE__), 'templates')
Class Public methods
new(app)

Source: show | on GitHub 

    # File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 10
10:     def initialize(app)
11:       @app = app
12:     end
Instance Public methods
call(env)

Source: show | on GitHub 

    # File actionpack/lib/action_dispatch/middleware/debug_exceptions.rb, line 14
14:     def call(env)
15:       begin
16:         response = @app.call(env)
17: 
18:         if response[1]['X-Cascade'] == 'pass'
19:           body = response[2]
20:           body.close if body.respond_to?(:close)
21:           raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
22:         end
23:       rescue Exception => exception
24:         raise exception if env['action_dispatch.show_exceptions'] == false
25:       end
26: 
27:       exception ? render_exception(env, exception) : response
28:     end