^start of string
Positive Lookahead(?=.{5,}) .{5,}any character (except for line terminators), repeated at least 5 times
httpthe literal text http (case sensitive) s?optionally matches the literal s (11510 / 1638 / 7316) (case sensitive)
:the literal : (5810 / 728 / 3A16)
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
\S+any non-whitespace character, repeated at least once
$end of string, or before its final line terminator