hello,world! header:If-Modified-Since: Sat, 24 Feb 2018 15:25:45 GMT Content-Length: User-Agent: CCBot/2.0 (http://commoncrawl.org/faq/) Host: www.seenit.com Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Content-Type: Accept-Encoding: x-gzip, gzip, deflate