GET /some/url.html HTTP/1.1 User-Agent: CCBot/2.0 (https://commoncrawl.org/faq/) Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 If-Modified-Since: Thu, 21 Feb 2019 16:00:55 AMT Host: www.delorie.com:81 Connection: Keep-Alive Accept-Encoding: gzip