PowerShell 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. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$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 = New-Object Chilkat.Pdf
$json = New-Object Chilkat.JsonObject
$jsonOut = New-Object Chilkat.JsonObject

#  The PDF opens without a password.
$success = $pdf.LoadFile("qa_data/pdf/no_copy_permission.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

#  Extracting text is refused, because the PDF's permissions do not allow copying.
$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $("Extraction refused: " + $pdf.LastErrorText)
}

#  "assess" reports only counts and ratings, never text, so it is always allowed.
$success = $pdf.ExtractText("assess",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$("rating: " + $jsonOut.StringOf("quality.rating"))

#  Load with the owner password to get owner rights, which include copying.
$pdf.OwnerPassword = "owner-secret"
$success = $pdf.LoadFile("qa_data/pdf/no_copy_permission.pdf")
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$success = $pdf.ExtractText("text",$json,$jsonOut)
if ($success -eq $false) {
    $($pdf.LastErrorText)
    exit
}

$($jsonOut.StringOf("text"))

#  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.