Only the last match in a line is catched

[gfdsa]

Hello,

Thanks for the great work on the module!

Running master on nginx/1.2.5 I've noticed this:

my rule:

subs_filter (?<=<img)(.*)(?<=src=)('|")http://www.domain.com/(.+?)(?!php)('|") $1$2http://cdn.domain.com/$3$4 ir;

my original text:

<img src="http://www.domain.com/blah1.png">
<img src="http://www.domain.com/blah2.png">
<img src="http://www.domain.com/blah3.png"><img src="http://www.domain.com"><img src="http://www.domain.com/blah5.png">

result from nginx with the rule applied:

<img src="http://cdn.domain.com/blah1.png">
<img src="http://cdn.domain.com/blah2.png">
<img src="http://domain.com/blah3.png"><img src="http://domain.com/blah4.png"><img src="http://cdn.domain.com/blah5.png">

this is the same with or without 'g' option and if I add the same subs_filter twice it does two substitutions per line. I am not good at C, less at parsing text in it. tried to trace it in the code but can't really figure out where the matches limit comes from.

[gfdsa]

hmmm, stupid me assuming things, sorry. rewrote it like this:

subs_filter <img(.+?)src=("|')http://www.domain.com/([^"']+)\.(jpeg|jpg|png|gif) <img$1src=$2http://cdn.domain.com/$3.$4 ir;

and works as expected. so apparently I there is some catch with look ahead/behind part ...