Question

I have a simple print script

my $pdf_data = $agent->content;
open my $ofh, '>:raw', "test.pdf"
or die "Could not write: $!";
print {$ofh} $pdf_data;
close $ofh;

Sometimes I get the “Wide character warning”, I know why I receive this and would like to be able to cancel the print instead of printing a corrupted fail. Something like

if(wideCharWarning)
{
delete "test.pdf"
}
else{
print {$ofh} $pdf_data;
}

Answer 1

You specified you’re printing bytes (:raw), but you’re not.

$ perl -we'
   open(my $fh, ">:raw", "file") or die $!;
   for (0..258) {
      print "$_\n";
      print $fh chr($_);
   }
'
...
249
250
251
252
253
254
255
256
Wide character in print at -e line 5.
257
Wide character in print at -e line 5.
258
Wide character in print at -e line 5.

To “cancel the print”, you simply have to check that what you print doesn’t contains non-bytes.

die if $to_print =~ /[^\x00-\xFF]/;