\S+any non-whitespace character, repeated at least once
.*any character (except for line terminators), repeated any number of times
\"*the literal " (3410 / 428 / 2216) , repeated any number of times
Non-Capturing Group(?:GET|POST|HEAD) GETthe literal text GET (case sensitive) POSTthe literal text POST (case sensitive) HEADthe literal text HEAD (case sensitive) .*any character (except for line terminators), repeated any number of times
the literal (3210 / 408 / 2016)
Group 2(MJ12bot|Baiduspider|AhrefsBot|UptimeRobot) MJ12botthe literal text MJ12bot (case sensitive) 2nd AlternativeBaiduspider Baiduspiderthe literal text Baiduspider (case sensitive) AhrefsBotthe literal text AhrefsBot (case sensitive) 4th AlternativeUptimeRobot UptimeRobotthe literal text UptimeRobot (case sensitive) .*any character (except for line terminators), repeated any number of times
"the literal " (3410 / 428 / 2216)