common.py 文件源码

def remove_trailing_version_from_href(href):
    """Removes the api version from the href.

    Given: 'http://www.nova.com/compute/v1.1'
    Returns: 'http://www.nova.com/compute'

    Given: 'http://www.nova.com/v1.1'
    Returns: 'http://www.nova.com'

    """
    parsed_url = urlparse.urlsplit(href)
    url_parts = parsed_url.path.rsplit('/', 1)

    # NOTE: this should match vX.X or vX
    expression = re.compile(r'^v([0-9]+|[0-9]+\.[0-9]+)(/.*|$)')
    if not expression.match(url_parts.pop()):
        LOG.debug('href %s does not contain version', href)
        raise ValueError(_('href %s does not contain version') % href)

    new_path = url_join(*url_parts)
    parsed_url = list(parsed_url)
    parsed_url[2] = new_path
    return urlparse.urlunsplit(parsed_url)