Once had my Australian production system go down because a js plugin we were using had added .au to its list of media types. Integration had a different TLD.
Response I got from the author was 'LOL!'.
:)
Every programming language has a library to parse urls.
Please, for the love of your own mothers, people: stop pretending like you know how to parse urls like they're strings. You don't. And even if you can, you won't do it right every time.
It's been demonstrated over and over again.
Just use the already tested url facilities to give you the host/path/query parameters