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Archive for the ‘rails’ category

Sporadic InvalidAuthenticityToken for some users

July 31st, 2009

A quick answer to a problem that’s not obvious but is easy to solve.

If users occasionally get a 422 error (usually when trying to logon) saying:
The change you wanted was rejected.
Maybe you tried to change something you didn’t have access to.

The server error is:
ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken)
/public/422.html (422 Unprocessable Entity)

It’s because the user has disabled cookies! It’s up to you to catch and deal with it better.

Processing SessionsController#create (for 163.1.180.9 at 2009-07-31 14:23:25) [POST]
  Parameters: {"commit"=>"Sign in", "action"=>"create", "authenticity_token"=>"z8VBO3J6AgbgzrwAYTc/ZLAQIf6zwnATa3GfI8xTUEw=", "to"=>"", "controller"=>"sessions", "password"=>"[FILTERED]", "email"=>"", "remember_me"=>"1"}

ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):
  passenger (2.2.4) lib/phusion_passenger/rack/request_handler.rb:91:in `process_request'
  passenger (2.2.4) lib/phusion_passenger/abstract_request_handler.rb:206:in `main_loop'
  passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:376:in `start_request_handler'
  passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:334:in `handle_spawn_application'
  passenger (2.2.4) lib/phusion_passenger/utils.rb:182:in `safe_fork'
  passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:332:in `handle_spawn_application'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `__send__'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `main_loop'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:195:in `start_synchronously'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:162:in `start'
  passenger (2.2.4) lib/phusion_passenger/railz/application_spawner.rb:213:in `start'
  passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:261:in `spawn_rails_application'
  passenger (2.2.4) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
  passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application'
  passenger (2.2.4) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
  passenger (2.2.4) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
  passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:254:in `spawn_rails_application'
  passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:153:in `spawn_application'
  passenger (2.2.4) lib/phusion_passenger/spawn_manager.rb:286:in `handle_spawn_application'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `__send__'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:351:in `main_loop'
  passenger (2.2.4) lib/phusion_passenger/abstract_server.rb:195:in `start_synchronously'

Rendering /public/422.html (422 Unprocessable Entity)

Hope that helps someone.

5 comments »

Posted in help, rails, ruby, webapps

Tags: errors help rails

Removing the www on a passenger rails app

February 19th, 2009

I’ve recently moved from nginx with mongrels to phusion passenger on apache.

I like to drop the www subdomain on my sites when I can, but the passenger chaps recommend that you don’t use mod_rewrite with mod_rails (aka mod_rack or even mod_ruby).

So how’s it to be done?

The simple solution is to do the re-write in rails. I found this snippet which does the trick (thanks to RSL):

def trim_www
  if request.subdomains.first == "www"
    if request.subdomains == ["www"]
      redirect_to "#{request.protocol}#{request.domain}#{request.port_string}#{request.path}"
    else
      subdomains = request.subdomains.shift.join(".")
      subdomains &lt;&lt; "." unless subdomains.blank?
      redirect_to "#{request.protocol}#{subdomains}#{request.domain}#{request.port_string}#{request.path}"
    end
  end
end

http://gist.github.com/67043

No comments »

Posted in rails, ruby, webapps

Tags: apache mod_rails mod_rewrite passenger

Which Weekend?! (new app)

March 10th, 2008

For anyone who’s been following my extremely sparse postings – here’s something exciting to look at - http://whichweekend.com - small simple useful. A week’s work (in the evenings) and it was super fun. Like they say – build something you want to use! I’ll be rolling out new features this coming week or two, then back to polishing off courseway (which I admit has been on hold for a while).