Question

I am trying to match a URL using the following regex, in Java

^http(s*):\\/\\/.+:[1-65535]/v2/.+/component/.+$

Test fails using URL: https://box:1234/v2/something/component/a/b

I suspect it’s the number range that’s causing it. Help me understand what am i missing here please?

Answer 1

See http://www.regular-expressions.info/numericranges.html. You can’t just write [1-65535] to match 1 or 65535. That says any number 1-6, or 5 or 3.

The expression you need is quite verbose, in this case:

([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])

(Credit to http://utilitymill.com/utility/Regex_For_Range)

Another issue is your http(s*). That needs to be https? because in its current form it might allow httpsssssssss://. If your regex takes public input, this is a concern.