Ruby 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. Ruby

require 'chilkat'

success = false

#  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 == false)
    print pdf.lastErrorText() + "\n";
    exit
end

#  Extracting text is refused, because the PDF's permissions do not allow copying.
success = pdf.ExtractText("text",json,jsonOut)
if (success == false)
    print "Extraction refused: " + pdf.lastErrorText() + "\n";
end

#  "assess" reports only counts and ratings, never text, so it is always allowed.
success = pdf.ExtractText("assess",json,jsonOut)
if (success == false)
    print pdf.lastErrorText() + "\n";
    exit
end

print "rating: " + jsonOut.stringOf("quality.rating") + "\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 == false)
    print pdf.lastErrorText() + "\n";
    exit
end

success = pdf.ExtractText("text",json,jsonOut)
if (success == false)
    print pdf.lastErrorText() + "\n";
    exit
end

print jsonOut.stringOf("text") + "\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.