RouteDowncaser

Makes routing in Rails case-insensitive (and other Rack-servers like Sinatra)

This gem hooks into the Rack middleware of Rails. This way all paths are downcased before dispatching to Rails’ routing mechanism. Querystring parameters are not changed in any way.

Requirements

This gem has been tested with Rails 3.+ and Sinatra

If you want this functionality in a Rails 2.x application, please refer to this blog post.

Installing

Rails

Just add the gem to your gemfile and run bundle

gem 'route_downcaser'

Then restart your Rails server. No configuration is needed. The gem simply hooks itself into the Rack middleware call stack.

If you have a controller named app/controllers/foo_controller.rb and the action index, you can now call it with:

http://localhost:3000/foo
http://localhost:3000/Foo
http://localhost:3000/FOO
http://localhost:3000/foo/index
http://localhost:3000/Foo/INDEX
http://localhost:3000/FOO/IndeX

All the above are valid.

Sinatra

In your Gemfile you add the gem:

gem 'route_downcaser'

In your application.rb you add the following (after loading Sinatra)

require 'route_downcaser'
use RouteDowncaser::DowncaseRouteMiddleware

Now this statement

get '/foo' do
  "Hello"
end

will respond to all these requests:

http://localhost:4567/foo
http://localhost:4567/Foo
http://localhost:4567/FOO

Background information

Sometimes you may wish to market a url which contains a controller name - like www.myshop.com/specialoffer. If this is done on offline media it will cause potential customers trouble, if they don’t use the correct casing. If, for some reason, the user types www.myshop.com/Specialoffer (with capital S), your Rails app will return a 404 not found.

The strange thing is, that the W3C specification states:

URLs in general are case-sensitive (with the exception of machine names). There may be URLs, or parts of URLs, where case doesn't matter, but identifying these may not be easy. Users should always consider that URLs are case-sensitive.

So www.myshop.com is case-insensitive and can be written as WWW.MYSHOP.COM, but the path (/specialoffer) is not.

It may make perfect sense for the W3C guys, but not for the average user.

When Rails introduced Rack middleware, it suddenly became possible to hook into the call-stack before the URL is used for action dispatching.

At first I just made this code as a snippet and published it on my blog. But since I found out that many people are actually using this, I finally decided to convert it into a gem.

All it really does is to take the path and downcase it before dispatching. Querystring parameters are NOT touched, they keep their casing, since it may have some contextual meaning.

Feedback

This is my first published gem, so bear with me, if I have missed some conventions. If you find anything wrong in documentation, code, dependencies, etc. please let me know at [email protected].