Usage Rights Management

Aspose.PDF for Python via .NET provides the PdfFileSignature facade for working with signed PDFs and related usage-rights settings. In some workflows, you may need to inspect whether a document contains usage rights and remove them before saving an updated version of the file.

This example demonstrates one common usage-rights management task:

1. Check whether a PDF contains usage rights.
2. Remove usage rights from the document.
3. Save the updated PDF file.

Check whether the PDF contains usage rights

Before removing usage rights, the example checks the current state of the document by calling contains_usage_rights(). This lets you confirm whether usage rights are present before making changes.

import aspose.pdf.facades as pdf_facades
import sys
from os import path


def check_usage_rights(infile):
    pdf_signature = create_pdf_file_signature(infile)
    try:
        had_usage_rights = pdf_signature.contains_usage_rights()
        print(f"PDF contains usage rights: {had_usage_rights}")
    finally:
        pdf_signature.close()

Remove usage rights from the PDF

Use remove_usage_rights() when the document should no longer retain its existing usage-rights settings. The example checks the initial state, removes the rights, and saves the updated PDF to a new file.

import aspose.pdf.facades as pdf_facades
import sys
from os import path


def remove_usage_rights(infile, outfile):
    pdf_signature = create_pdf_file_signature(infile)
    try:
        had_usage_rights = pdf_signature.contains_usage_rights()
        print(f"PDF contains usage rights before removal: {had_usage_rights}")
        pdf_signature.remove_usage_rights()
        pdf_signature.save(outfile)
    finally:
        pdf_signature.close()