I am trying to match on any incoming requests that don't have a trailing slash. I also want to capture the URL path, to use in a capture group. Here is what I've gotten so far.
Incoming URL: http://www.example.com/path/to/
Regex: http:\/\/www.example.com\/(.*)[.\/]
Here's a link to the regex tester results
This captures what I want, but it always matches on all URLs - not the URLs that don't contain a trailing slash.
The regex processor is PERL based.
What do I need to change?
To match URLs that do not end with /, use a negative lookbehind with an $ anchor like below:
http:\/\/www.example.com\/(.*)$(?<!\/)
^^^^^^^^
$ will assert the position at the end of the string, and the lookbehind will fail the match if there is a slash. See this regex demo.
Another way is with a (?!.*\/$) lookahead:
http:\/\/www.example.com\/(?!.*\/$)(.*)
^^^^^^^^^
See another regex demo.
The (?!.*\/$) negative lookahead will fail the match after finding out that there is / at the end of the string ($). Note that .* (matches any 0+ chars) is necessary to get to the end of the string, you cannot just use (?!\/$).
You want a not-capture group at the end and match line start/end like this
^http:\/\/www.example.com\/(.*)[^\/]$ (replace "match period or /" [.\/] with "not /" [^\/], and surround with ^$)
(You where so close!)
Add s? to make https? to allow an optional s if you don't care which protocol is being used.
http:\/\/www.example.com\/(.*)$(?<!\/)will work. - Wiktor Stribiżew