Regex to match word in a URL

Question

I need a regular expression which matches:

http://example.com/foo
http://example.com/foo/
http://example.com/foo/bar

but not:

http://example.com/foobar

Using http://example.com/foo/? matches the three types, but it matches /foobar too that I don't want. What should I add to the regex to not match /foobar?

Answer 1

Try this one:

^http://example\.com/foo(?:/.*)?$

Answer 2

Try something like this:

http://example.com/foo(?:\/|/(\w+)|)

In regex form:

/http:\/\/example.com\/foo(?:\/|\/(\w+)|)/

This will match example.com/foo or example.com/foo/bar or example.com/foo/

---

Some explaination:

• (foo|bar) matches foo or bar
• (?:) a group with the ?: in the begin will not been captured
• \/ will match a / at the end
• \/(\w+) match a / with a word character who is repeated one or more times
• |) will match nothing at the end of the string.