'Returns the absolute location of ``path`` relative to ``root``.
``root`` is the path configured for this `StaticFileHandler`
(in most cases the ``static_path`` `Application` setting).
This class method may be overridden in subclasses.  By default
it returns a filesystem path, but other strings may be used
as long as they are unique and understood by the subclass\'s
overridden `get_content`.
.. versionadded:: 3.1'

@classmethod
def get_absolute_path(cls, root, path):

    abspath = os.path.abspath(os.path.join(root, path))
    return abspath
