I also tried (/^msg=\"(.*?)\"+) This also gives me msg="http_decoder:

No, it does not. Whatever that captures must end with a '"'. A few possible reasons you might think you got what you say you got:

• Perhaps you are suffering from buffering? That is to say you may be viewing the output before all of it has been output.
• Or maybe you are outputting control characters which are affecting your terminal, making it look like that's what's being output.
• Maybe you are confusing your test runs, and you never got that output from that code.

my ($msg) = /^msg="(.*?)"/ should do the trick, but since I dislike using the "?" quantifier, I'd use my ($msg) = /^msg="[^"]*"/.