Rust 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. Rust

// 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 = chilkat::Pdf::new();
let json = chilkat::JsonObject::new();
let json_out = chilkat::JsonObject::new();

// The PDF opens without a password.
if pdf.load_file("qa_data/pdf/no_copy_permission.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

// Extracting text is refused, because the PDF's permissions do not allow copying.
if pdf.extract_text("text", &json, &json_out).is_err() {
    println!("Extraction refused: {}", pdf.last_error_text());
}

// "assess" reports only counts and ratings, never text, so it is always allowed.
if pdf.extract_text("assess", &json, &json_out).is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("rating: {}", json_out.string_of("quality.rating").unwrap_or_default());

// Load with the owner password to get owner rights, which include copying.
pdf.set_owner_password("owner-secret");
if pdf.load_file("qa_data/pdf/no_copy_permission.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

if pdf.extract_text("text", &json, &json_out).is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("{}", json_out.string_of("text").unwrap_or_default());

// 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.