GZip magic is easy - The first two bytes are "\x1f\x8b". You can also check for compress which I recall is "\x1f\x9b" though you may want to check.

__SIG__
use B;
printf "You are here %08x\n", unpack "L!", unpack "P4", pack
  "L!", B::svref_2object(sub{})->OUTSIDE;

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In reply to Re^4: Compressed content module by diotalevi
in thread Compressed content module by simon.proctor

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