Rack Rewrite Example

rack_rewrite.rb

# config/initializers/rack_rewrite.rb
require "rack/rewrite"

Rails.configuration.middleware.insert_before(Rack::Runtime, Rack::Rewrite) do
  # Content
  r301 "/upcase/ruby", "/upcase/rails"
  r301 "/upcase/sass", "/upcase/design"
  r301 "/upcase/products", "/upcase/practice"
  r301 "/upcase/users/new", "/upcase/join"
  r301 "/upcase/sign_up", "/upcase/join"
  r301 "/upcase/pages/landing", "/upcase/join"

  # Dynamic
  r301 %r{^/upcase/(.+)/articles}, "https://robots.thoughtbot.com/tags/$1"
  r301 %r{^/upcase/courses/(.+)}, "/upcase/$1"
end