^start of string
httpthe literal text http (case insensitive) s?optionally matches the literal s (11510 / 1638 / 7316) (case insensitive)
:the literal : (5810 / 728 / 3A16)
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
Negated Character Class[^\n]+ +matches at least one character outside the set below:
\na line-feed (newline) character (ASCII 10)
$end of string, or before its final line terminator
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters