the literal (3210 / 408 / 2016)
Non-Capturing Group(?:::f{4,6}:)? ?repeats the group contents below at most once:
f{4,6}the literal f (10210 / 1468 / 6616) (case sensitive), repeated between 4 and 6 times
:the literal : (5810 / 728 / 3A16)
\S+any non-whitespace character, repeated at least once
.*any character (except for line terminators), repeated any number of times
"GET the literal text "GET (case sensitive) \/the literal / (4710 / 578 / 2F16)
w00tw00tthe literal text w00tw00t (case sensitive) .*any character (except for line terminators), repeated any number of times