Always been struggeling with RegEx, help is much appreciated! I want to match parts of a URL with Regex but cannot get my head around it.
Domains are:
https://name.secondpart.thirdpart.com
I want my regex to match
name How would I achieve this?
Started with (?<=^|\.) and (?<=^|\.)secondpart\.thirdpart\.com$ but it didn't work.
Note that I escaped the slashes using leading backslashes, assuming you use slash as your regex delimiter. If you use no or a different delimiter (e.g. #) you can just use / instead of \/.
If you only care about the first part, then
^[^.:\/]+:\/\/([^.]+)
should do the trick.
https://regex101.com/r/CXXOOD/1
If you for also need to enforce a specific domain after that then capture it in a group like this
^[^.:\/]+:\/\/([^.]+)\.secondpart\.thirdpart\.com$
https://regex101.com/r/gjfYhC/1
If you want to make sure that at exactly 3 parts come after the sub-domain part, but don't care what they are:
^[^.:\/]+:\/\/([^.]+)(?:\.[^.]+){3}$