url http://localhost:%(port)d/%(datadir)s/http_lowercase.html cache key http://localhost:%(port)d/%(datadir)s/http_lowercase.html real url http://localhost:%(port)d/%(datadir)s/http_lowercase.html valid url HtTP://WwW.ExaMple.cOm/ cache key http://www.example.com/ real url http://www.example.com/ name l1 valid url HTTP://WWW.EXAMPLE.COM/ cache key http://www.example.com/ real url http://www.example.com/ name l2 valid