header 格式

headers = {
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
    'Accept-Encoding': 'gzip, deflate',
    'Accept-Language': 'zh-CN,zh;q=0.9',
    'Cache-Control': 'max-age=0',
    'Connection': 'keep-alive',
    'Cookie':' __jsluid=2e52677fc116ae7379a8cdeeeb9be846; UM_distinctid=16894d5ab48a2-044dc2272aed6b-6313363-100200-16894d5ab4911a; gwdshare_firstime=1548722294746; _gscu_1951211925=48722294zn7vac35; sblcookie=20111114; CNZZDATA1275388486=1482128160-1548681132-%7C1549865972',
    'Host': 'sbj.saic.gov.cn',
    'If-Modified-Since': 'Tue, 04 Dec 2018 11:14:23 GMT',
    'If-None-Match': "284d-57c305e2041c0-gzip",
    'Upgrade-Insecure-Requests': '',
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36'
}