Attachments in PDF document Leave feedback

A PDF can carry embedded file attachments. Watermarker.get_content() returns a PdfContent whose attachments collection lets you add, extract, and remove them — and you can even open an attachment in its own Watermarker to watermark it.

The example embeds a Word document into the PDF as an attachment.

from groupdocs.watermark import Watermarker
from groupdocs.watermark.options.pdf import PdfLoadOptions

def add_attachment():
    with Watermarker("./document.pdf", PdfLoadOptions()) as watermarker:
        content = watermarker.get_content()
        with open("./sample.docx", "rb") as f:
            data = f.read()
        content.attachments.add(data, "sample.docx", "Attached Word document")
        watermarker.save("./output.pdf")

if __name__ == "__main__":
    add_attachment()

Binary file (PDF, 512 KB)

Iterate the attachments collection to read each attachment’s metadata and content.

from groupdocs.watermark import Watermarker
from groupdocs.watermark.options.pdf import PdfLoadOptions

with Watermarker("./document.pdf", PdfLoadOptions()) as watermarker:
    content = watermarker.get_content()
    print("Attachments:", len(content.attachments))
    for attachment in content.attachments:
        info = attachment.get_document_info()
        print(f"- name={attachment.name!r} type={info.file_type} size={len(attachment.content)} bytes")
        # Save the attachment's bytes to disk
        with open(f"./{attachment.name}", "wb") as f:
            f.write(attachment.content)

For the example PDF produced above, this prints:

Attachments: 1
- name='sample.docx' type=Docx (.docx) - WordProcessing size=14752 bytes

Use content.attachments.remove_at(index) or content.attachments.remove(attachment) to delete an attachment, and open an attachment in its own Watermarker (from its content bytes) to add a watermark to the attached document itself.