HTTP/1.1 200 OK Date: Sat, 19 Jun 2021 10:06:30 GMT Content-Type: text/html; charset=utf-8 Content-Length: 0 Connection: keep-alive Server: Tengine Last-Modified: Thu, 07 Jan 2021 07:50:31 GMT ETag: "5ff6bd47-0" ip_network: 15.46 Accept-Ranges: bytes X-Ser: BC28_lt-henan-nanyang-1-cache-7, BC139_dx-lt-yd-jiangsu-zhenjiang-3-cache-6, BC109_US-DistColumbia-washingtonDC-1-cache-1, BC122_HK-xianggang-xianggang-4-cache-3