Class: ActionDispatch::ShowExceptions

Inherits:
Object
  • Object
show all
Defined in:
lib/action_dispatch/middleware/show_exceptions.rb

Overview

This middleware rescues any exception returned by the application and renders nice exception pages if it’s being rescued locally.

Constant Summary collapse

RESCUES_TEMPLATE_PATH = 
File.join(File.dirname(__FILE__), 'templates')
FAILSAFE_RESPONSE = 
[500, {'Content-Type' => 'text/html'},
      ["<html><body><h1>500 Internal Server Error</h1>" <<
"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.</body></html>"]]
@@rescue_responses = 
Hash.new(:internal_server_error)
@@rescue_templates = 
Hash.new('diagnostics')

Instance Method Summary collapse

Constructor Details

#initialize(app, consider_all_requests_local = false) ⇒ ShowExceptions

Returns a new instance of ShowExceptions.



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# File 'lib/action_dispatch/middleware/show_exceptions.rb', line 40

def initialize(app, consider_all_requests_local = false)
  @app = app
  @consider_all_requests_local = consider_all_requests_local
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/action_dispatch/middleware/show_exceptions.rb', line 45

def call(env)
  begin
    status, headers, body = @app.call(env)
    exception = nil

    # Only this middleware cares about RoutingError. So, let's just raise
    # it here.
    if headers['X-Cascade'] == 'pass'
       raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"
    end
  rescue Exception => exception
    raise exception if env['action_dispatch.show_exceptions'] == false
  end

  exception ? render_exception(env, exception) : [status, headers, body]
end