def get(self, hash): # The request parses the hash from the path by slicing the string to omit # the leading "\". We ask the datastore for any entity that matches the hash. url = Url.get_by_key_name(hash) # If the hash is valid it will return Url Model object else it will return None if url: # The successul return of a url object allows the application to return a # redirct (301) to the long url. self.redirect(str(url.link)) else: # If there is no short url it is proper to return a 404 as the resource is # not available. self.abort(404)
