How to write regex to match pages and subdomains of one URL only?

I'm trying to get the following into a regex:

*.foo.com/*

success test cases

• www.foo.com
• www.foo.com/blah
• aaa.www.foo.com/woot/woot/woot

failure cases

开发者_StackOverflow
• www.blah.com
• blah.com/ruroh

How would I write a regex to do this?

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A literal translation of your glob into regex is:

.*\.foo\.com(/.*)?

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This should work, if you mean to test the sub-domains for foo.com:

/(?<part>(w(?!ww)|w(?=[a-z0-9]{3,})|[a-vx-z0-9])[a-z0-9]*)\.foo\.com/

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I have an easy regex that works:

(.*)\.foo\.com

You can easily test a regular expression yourself using rubular. I strongly recommend it.