Rack::URLMap

    # File lib/rack/urlmap.rb, line 15
15:     def initialize(map = {})
16:       remap(map)
17:     end

    # File lib/rack/urlmap.rb, line 36
36:     def call(env)
37:       path = env["PATH_INFO"].to_s.squeeze("/")
38:       script_name = env['SCRIPT_NAME']
39:       hHost, sName, sPort = env.values_at('HTTP_HOST','SERVER_NAME','SERVER_PORT')
40:       @mapping.each { |host, location, app|
41:         next unless (hHost == host || sName == host \
42:           || (host.nil? && (hHost == sName || hHost == sName+':'+sPort)))
43:         next unless location == path[0, location.size]
44:         next unless path[location.size] == nil || path[location.size] == ?/
45: 
46:         return app.call(
47:           env.merge(
48:             'SCRIPT_NAME' => (script_name + location),
49:             'PATH_INFO'   => path[location.size..-1]))
50:       }
51:       [404, {"Content-Type" => "text/plain"}, ["Not Found: #{path}"]]
52:     end

    # File lib/rack/urlmap.rb, line 19
19:     def remap(map)
20:       @mapping = map.map { |location, app|
21:         if location =~ %r{\Ahttps?://(.*?)(/.*)}
22:           host, location = $1, $2
23:         else
24:           host = nil
25:         end
26: 
27:         unless location[0] == ?/
28:           raise ArgumentError, "paths need to start with /"
29:         end
30:         location = location.chomp('/')
31: 
32:         [host, location, app]
33:       }.sort_by { |(h, l, a)| [h ? -h.size : (-1.0 / 0.0), -l.size] }  # Longest path first
34:     end