class Sinatra::Base

def process_route(pattern, keys, conditions, block = nil, values = [])
  @original_params ||= @params
  route = @request.path_info
  route = '/' if route.empty? and not settings.empty_path_info?
  if match = pattern.match(route)
    values += match.captures.to_a.map { |v| force_encoding URI.decode(v) if v }
    params =
      if keys.any?
        keys.zip(values).inject({}) do |hash,(k,v)|
          if k == 'splat'
            (hash[k] ||= []) << v
          else
            hash[k] = v
          end
          hash
        end
      elsif values.any?
        {'captures' => values}
      else
        {}
      end
    @params = @original_params.merge(params)
    @block_params = values
    catch(:pass) do
      conditions.each { |c| throw :pass if c.bind(self).call == false }
      block ? block[self, @block_params] : yield(self, @block_params)
    end
  end
ensure
  @params = @original_params
end