关于Bing壁纸获取无法打开图片

获取Bing壁纸时能正确获得url，但是保存的文件却无法打开，查找后发现有反爬策略，加入如下headers

    headers = {
        'Host': 'bing.ioliu.cn',
        'Pragma': 'no-cache',
        'Accept-Encoding': 'gzip, deflate',
        'Accept-Language': 'zh-CN,zh;q=0.8,en;q=0.6',
        'Cache-Control': 'no-cache',
        'Connection': 'keep-alive',
        'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) '
                      'Chrome/59.0.3071.115 Safari/537.36',
        'Accept': 'image/webp,image/apng,image/*,*/*;q=0.8',
        'Referer': '{}'.format(referer),
        }