Perl Requires Chilkat v11.7.0+

Extract Text from a PDF that Forbids Copying

See more PDF Text Extraction Examples

Demonstrates a PDF that opens without a password but whose permissions do not allow copying text. The "text", "markdown", "search" and "tables" operations fail with that reason; "assess" always works. Loading the PDF with the OwnerPassword property set grants owner rights, and extraction works. Perl

use chilkat();

$success = 0;

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

#  The PDF used in this example (owner password: owner-secret; copying not permitted) is available at no_copy_permission.pdf

$pdf = chilkat::CkPdf->new();
$json = chilkat::CkJsonObject->new();
$jsonOut = chilkat::CkJsonObject->new();

#  The PDF opens without a password.
$success = $pdf->LoadFile("qa_data/pdf/no_copy_permission.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

#  Extracting text is refused, because the PDF's permissions do not allow copying.
$success = $pdf->ExtractText("text",$json,$jsonOut);
if ($success == 0) {
    print "Extraction refused: " . $pdf->lastErrorText() . "\r\n";
}

#  "assess" reports only counts and ratings, never text, so it is always allowed.
$success = $pdf->ExtractText("assess",$json,$jsonOut);
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print "rating: " . $jsonOut->stringOf("quality.rating") . "\r\n";

#  Load with the owner password to get owner rights, which include copying.
$pdf->put_OwnerPassword("owner-secret");
$success = $pdf->LoadFile("qa_data/pdf/no_copy_permission.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

$success = $pdf->ExtractText("text",$json,$jsonOut);
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print $jsonOut->stringOf("text") . "\r\n";

#  Sample output:

#  Extraction refused: ChilkatLog:
#    ExtractText:
#      ...
#        The PDF's permissions do not allow copying or extracting text (load it with the owner password to extract).
#      ...
#  rating: good
#  Visitor Leaflet
#  
#  Welcome to the harbor lighthouse. The tower is open on weekends from July to September.
#  
#  Please keep to the marked paths and do not climb on the breakwater.
#  
#  The lantern room is closed in high winds.