Clean dirty cookies from Rack environment and prevent Rack applications to stop working because of dirty cookies not conforming to RFC specifications.

This gem is useful only for Rack version <= 1.4.1; newer versions of Rack work correctly with bad encoded cookies.

Just edit your Gemfile and add:

gem 'rack-cleancookies'

then add Rack::CleanCookies::Middleware to your Rack stack, e.g.:

use Rack::CleanCookies::Middleware

if you prefer to have the rack-errors env variable filled with dirty cookies, use:

use Rack::CleanCookies::Middleware, verbose: true

The original version was provided as a gist by Eric Cohen (https://github.com/eirc). Thanks!