helpers.py 文件源码

def url_join(*parts, **kwargs):
    """
    Normalize url parts and join them with a slash.
    adapted from: http://codereview.stackexchange.com/q/13027
    """
    def concat_paths(sequence):
        result = []
        for path in sequence:
            result.append(path)
            if path.startswith('/'):
                break
        return '/'.join(reversed(result))

    schemes, netlocs, paths, queries, fragments = zip(*(urlsplit(part) for part in reversed(parts)))
    scheme = next((x for x in schemes if x), kwargs.get('scheme', 'http'))
    netloc = next((x for x in netlocs if x), '')
    path = concat_paths(paths)
    query = queries[0]
    fragment = fragments[0]
    return urlunsplit((scheme, netloc, path, query, fragment))