Why would you expect it to work?

HTTP is a simple protocol, and printing "text text text text" after you say that what's coming is an "image" of type "jpeg", doesn't sit well with any HTTP compliant application.

print $co->header(-type=>'image/jpeg'),$imagedata; If you wish to speak HTTP, you have to know how to speak HTTP.

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** The Third rule of perl club is a statement of fact: pod is sexy.