37: def call(env)
38: path = env["PATH_INFO"]
39: script_name = env['SCRIPT_NAME']
40: hHost, sName, sPort = env.values_at('HTTP_HOST','SERVER_NAME','SERVER_PORT')
41: @mapping.each { |host, location, match, app|
42: next unless (hHost == host || sName == host \
43: || (host.nil? && (hHost == sName || hHost == sName+':'+sPort)))
44: next unless path.to_s =~ match && rest = $1
45: next unless rest.empty? || rest[0] == ?/
46: env.merge!('SCRIPT_NAME' => (script_name + location), 'PATH_INFO' => rest)
47: return app.call(env)
48: }
49: [404, {"Content-Type" => "text/plain", "X-Cascade" => "pass"}, ["Not Found: #{path}"]]
50: ensure
51: env.merge! 'PATH_INFO' => path, 'SCRIPT_NAME' => script_name
52: end