I have just started learning Rust and am part way through my first project. I want to be able to update the metadata (title, author, subject, keywords) associated with PDF files. Can anyone advise which (if any) crate might support that?
I've used https://crates.io/crates/lopdf for creating PDFs. In theory you can load your PDF, iterate through it and replace values. You may need those values:
You find it in the spec https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf page 550.
I wish you good luck , PDF is such a mess, but it's doable.
Thanks @daaitch. I'll have a look and see what sense I can make of it!
Looking in the spec you referenced, section 14.3.2, it states:
Metadata, both for an entire document and for components within a document, may be stored in PDF streams called metadata streams (PDF 1.4).
The contents of a metadata stream shall be the metadata represented in Extensible Markup Language (XML).
The format of the XML representing the metadata is defined as part of a framework called the Extensible Metadata Platform (XMP) and described in the Adobe document XMP: Extensible Metadata Platform.
Digging around a bit further, I discovered:
Hopefully, one of those will further help me in my quest!