JMeter Proxy exclusion patterns still being recorded

Question

I am using JMeter to record traffic in my browser. In my URL Patterns to Exclude are:

.*\.jpg, .*\.js, .*\.png

Which looks like they should block these patterns (I've even tested it with a regex tester here)

Yet, I still see plenty of these files get pulled up. In a related forum someone had a similar issue, but his was caused by having additional url parameters afterwards (eg www.website.com/image.jpg?asdf=thisdoesntmatch). However this doesn't seem to be the case here. Can anyone point me in the right direction?

Answer 1

As already mentioned in the question comments it is probably a problem with the trailing characters. The pattern matcher is executed against the complete url including parameters. So an URL http://example.com/layout.css?id=123 is not matched against the pattern .*\.css
The JMeter HTTP Request Sample seperates the Path and the Parameters so it might be not obvious when you look at the URL.

Solution:
Change the pattern to support trailing characters .*\.css.*

Explained
.* Any character
\. Matching the . (dot) character
css The character sequence css
.* Any character