Swift 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. Swift

func chilkatTest() {
    var success: Bool = 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

    let pdf = CkoPdf()!
    let json = CkoJsonObject()!
    let jsonOut = CkoJsonObject()!

    //  The PDF opens without a password.
    success = pdf.loadFile(filePath: "qa_data/pdf/no_copy_permission.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    //  Extracting text is refused, because the PDF's permissions do not allow copying.
    success = pdf.extractText(op: "text", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("Extraction refused: \(pdf.lastErrorText!)")
    }

    //  "assess" reports only counts and ratings, never text, so it is always allowed.
    success = pdf.extractText(op: "assess", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("rating: \(jsonOut.string(of: "quality.rating")!)")

    //  Load with the owner password to get owner rights, which include copying.
    pdf.ownerPassword = "owner-secret"
    success = pdf.loadFile(filePath: "qa_data/pdf/no_copy_permission.pdf")
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    success = pdf.extractText(op: "text", jsonIn: json, jsonOut: jsonOut)
    if success == false {
        print("\(pdf.lastErrorText!)")
        return
    }

    print("\(jsonOut.string(of: "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.

}