将HTTP请求头转化为key-value形式

{ 'Accept': '/', 'Accept-Encoding': 'gzip, deflate', 'Accept-Language': 'zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2', 'Authorization': 'BasicAuth D8DD2812A942776A6DBE6B97C4B17D733D864D01712AD8EE67526C343584A1D32495BC5A76C430F7DB325F5352B6DE22EF786754210BADC6AD2535E5634DE229F749FF47FC3991AE448BE12E1E3B2E9A', 'Connection': 'keep-alive', 'Content-Length': '122', 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8', 'Cookie': 'Hm_lvt_85f48cee3e51cd48eaba80781b243db3=1679453847,1680847673,1681560873; Hm_lvt_01a310dc95b71311522403c3237671ae=1679453851,1680847690,1681560904; _ga=GA1.2.183259311.1678073781; Hm_lpvt_85f48cee3e51cd48eaba80781b243db3=1681564052; _gid=GA1.2.410847294.1681560898; ASP.NET_SessionId=tfotprzcmnmjbwxq4ms3sl2j; Hm_lpvt_01a310dc95b71311522403c3237671ae=1681564052; 60014_mmbuser=DVQDWgpRAWhSDl0PAwsFX1IDDVNQAQMHAFgOWVIMVVAACFNUDFIDVg%3d%3d; _gat_gtag_UA_145348783_1=1; acw_tc=784e2c9616815640156821390e2d8b55781d00083f676d6e17a2ceb2ed0c3f', 'Host': 'tool.manmanbuy.com', 'Origin': 'http://tool.manmanbuy.com', 'Referer': 'http://tool.manmanbuy.com/HistoryLowest.aspx?url=https%3A%2F%2Fitem.jd.com%2F5479265.html', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/111.0', 'X-Requested-With': 'XMLHttpRequest'}