images.py 文件源码

def headerize(func):
    """The decorator adds header links to response for paginator"""
    @wraps(func)
    def wrapper(*args, **kwargs):
        data = func(*args, **kwargs)
        resp = jsonify(data)
        fmt = '<{base}?page={page}&per_page={per_page}>; rel="{rel}"'
        links = [{'page': data['page'] - 1, 'rel':'prev'},
                 {'page': data['page'] + 1, 'rel':'next'},
                 {'page': 1, 'rel': 'first'},
                 {'page': data['num_pages'], 'rel':'last'}]
        header = ', '.join(fmt.format(base=request.base_url,
                                      page=i['page'],
                                      per_page=data['per_page'],
                                      rel=i['rel'])
                           for i in links)
        resp.headers.extend({'Link': header})
        return resp
    return wrapper