annotated-pdf-spec
kaitai_struct_formats
annotated-pdf-spec | kaitai_struct_formats | |
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1 | 3 | |
5 | 682 | |
- | 0.1% | |
10.0 | 6.3 | |
about 2 years ago | 19 days ago | |
Kaitai Struct | ||
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annotated-pdf-spec
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Show HN: I am building a new Python library to read/write PDF files
As others have already written, there are many slightly invalid PDF files out there in the wild that many readers can display mostly fine and which your library should also be able to handle.
If you can, grab yourself a copy of the most recent PDF 2.0 specification since it contains much more information and is much more correct in terms of how to implement things. Also have a look at the errata at https://pdf-issues.pdfa.org/32000-2-2020/index.html.
As I'm implementing a PDF library (in Ruby), I have started to collect some situations that arise in the wild but are not spec-compliant, see https://github.com/gettalong/annotated-pdf-spec. That might help you in parsing some invalid PDFs
kaitai_struct_formats
- Magika: AI powered fast and efficient file type identification
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Fq: Jq for Binary Formats
Kaitai has a repository of binary formats[1] that can be used in visualizers or to auto-generate parsers.
[1] https://formats.kaitai.io/
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Show HN: I am building a new Python library to read/write PDF files
This is tangential to your submission, but PDF is the file format I use for exercising any library that claims to be a declarative file format (ala https://github.com/kaitai-io/kaitai_struct_formats#readme )
What are some alternatives?
pdfquery - A fast and friendly PDF scraping library.
PyMuPDF - PyMuPDF is a high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.
pdfsyntax - A Python library to inspect and modify the internal structure of a PDF file
cutter - Free and Open Source Reverse Engineering Platform powered by rizin
i7j-rups - RUPS is an acronym for Reading and Updating PDF Syntax. RUPS is a tool built on top of iText® that allows you to look inside a PDF document and browse the different PDF objects and content streams.
jqjq - jq implementation of jq
betterwrite - :bookmark_tabs: A Creative Word Processor.
pandoc - Universal markup converter
pdfplumber - Plumb a PDF for detailed information about each char, rectangle, line, et cetera — and easily extract text and tables.