def key_match(key1, key2):
    """determines whether key1 matches the pattern of key2 (similar to RESTful path), key2 can contain a *.
    For example, "/foo/bar" matches "/foo/*"
    """
    i = key2.find('*')
    if i == -1:
        return key1 == key2
    if len(key1) > i:
        return key1[:i] == key2[:i]
    return key1 == key2[:i]
