You can also ignore the verification of URLs entirely, and just carry the assumption that you were given a proper URL as far as you can -- until something fails that actually wanted to do something practical with your URL.

If your program is interactive, and not just feeding a database, please consider this option. You'll need to gracefully recover from errors anyway, so why engage in duplicate efforts?

In reply to Re: regex to match URLs by Anonymous Monk
in thread regex to match URLs by Anonymous Monk

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