In practice Regexp::Common works very well for me.

I maintain the #perl6 irc logs and URLs are automatically linkified using this regex:

qr/\b$RE{URI}{HTTP}(?:#[\w_%:-]+)?\b/

and it works fairly well. I guess about 99% or URLs are handled correctly, and one half of the 1% failures are due to my rather naive handling of anchors.

Though I have to admit that "my" chatters are mostly geeks who paste URLs with leading http:// (and I ignore other URLs).

Perl 6 in German -- Difficult Sudoku

In reply to Re^3: detecting URLs and turning them into links by moritz
in thread detecting URLs and turning them into links by keiusui

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