# == How To
#
# We are going to assume your current working directory is the Rails
# root and this file is named mongrel_rewrite.rb in a directory 'dev'
# off of that root.
#
# $ mongrel_rails start -S dev/mongrel_rewrite.rb
#
# That's it!

#
# These are our mongrel_rewrite rules. Obviously, add rules to
# the RewriteRules hash with the key as the regex to match and the
# value as the replacement string.
#
module ::Mongrel
  RewriteRules = {
    /\/(.+)\/([^.]+)\.\d+\.(swf|js|css|gif|jpg|png)/ => '/$1/$2.$3',
  }
end

#
# Enable really basic mod_rewrite style goodness with Mongrel.
#
class ::Mongrel::Rails::RailsHandler < ::Mongrel::HttpHandler
  alias :old_process :process

  # Enable rewriting.
  def process(request, response)
    if ::Mongrel.const_defined?(:RewriteRules) && RewriteRules.is_a?(Hash)
      path = request.params[Const::PATH_INFO].dup

      RewriteRules.dup.each do |rule, rewrite|
        if matches = rule.match(path).to_a[1..-1]
          rewrite = rewrite.dup
          while matches.size.nonzero? do
            rewrite.sub!(/\$(\d+)/, matches.shift)
          end
          path = rewrite
        end
      end

      request.params[Const::PATH_INFO] = path
    end
    old_process(request, response)
  end
end