# File lib/flickr/urls.rb, line 39
        def lookupUser(url)
                res = @flickr.call_method('flickr.urls.lookupUser','url'=>url)
                els = res.elements
                nsid = els['/user'].attributes['id']
                p = @flickr.person_cache_lookup(nsid) ||
                        Flickr::Person.new(@flickr,nsid,
                                els['/user/username'].text)
                @flickr.person_cache_store(p)
                return p
        end