class Puma::Rack::URLMap

def call(env)
  path = env['PATH_INFO']
  script_name = env['SCRIPT_NAME']
  http_host = env['HTTP_HOST']
  server_name = env['SERVER_NAME']
  server_port = env['SERVER_PORT']
  is_same_server = casecmp?(http_host, server_name) ||
                casecmp?(http_host, "#{server_name}:#{server_port}")
  @mapping.each do |host, location, match, app|
    unless casecmp?(http_host, host) \
        || casecmp?(server_name, host) \
        || (!host && is_same_server)
      next
    end
    next unless m = match.match(path.to_s)
    rest = m[1]
    next unless !rest || rest.empty? || rest[0] == ?/
    env['SCRIPT_NAME'] = (script_name + location)
    env['PATH_INFO'] = rest
    return app.call(env)
  end
  [404, {'Content-Type' => "text/plain", "X-Cascade" => "pass"}, ["Not Found: #{path}"]]
ensure
  env['PATH_INFO'] = path
  env['SCRIPT_NAME'] = script_name
end