For Google Analytics, I wanted to create some chainable filters to deal with a set of subdomains that can occur on alpha, beta, and production, etc. So I needed to find a way to say “Give me all of the production subdomains, and none of the alpha/beta variants, or preprod.”
Here are the sample URLs that I want to filter out the alpha/beta/preprod from:
acme.domain.com acme.beta123.domain.com acme.alpha123.domain.com wyle.alpha.domain.com wyle.showme.domain.comcool_stuff.html acme-two.domain.com acme-two.preprod.domain.com
Here is the resultant regex:
Big shout out to Rubular.com, an awesome place to test out regex!