Look at Archive::Zip::MemberRead. It allows reading members of zip files like a filehandle. The example from the docs reads through a contained file by lines.

use Archive::Zip;
  use Archive::Zip::MemberRead;
  $zip = new Archive::Zip("file.zip");
  $fh  = new Archive::Zip::MemberRead($zip, "subdir/abc.txt");
  while (defined($line = $fh->getline()))
  {
      print $fh->input_line_number . "#: $line\n";
  }
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