    def all(cls, **kwargs):
        """Return a `Page` of instances of this `Resource` class from
        its general collection endpoint.

        Only `Resource` classes with specified `collection_path`
        endpoints can be requested with this method. Any provided
        keyword arguments are passed to the API endpoint as query
        parameters.

        """
        url = recurly.base_uri() + cls.collection_path
        if kwargs:
            url = '%s?%s' % (url, urlencode(kwargs))
        return Page.page_for_url(url)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.