Kludex/python-multipart 0.0.33

Version 0.0.33

on GitHub

🛡️ Safer form parsing

This release lets you cap URL-encoded form fields as they stream in, and fixes several upload and decoding edge cases. It also drops Python 3.10 and adds Python 3.15.

pip install python-multipart==0.0.33

• Limit URL-encoded fields while streaming (#333). The new opt-in MAX_FIELDS and MAX_FIELD_SIZE options for FormParser raise FormParserError before oversized data is buffered. Both default to no limit, and multipart forms are unaffected.
• Nameless uploads no longer crash when spilled to disk (#343). Uploads without a filename used to raise AttributeError when UPLOAD_KEEP_EXTENSIONS or UPLOAD_KEEP_FILENAME was set.
• UPLOAD_DIR accepts str with UPLOAD_KEEP_FILENAME (#335). A str upload directory used to fail on the first write to disk.
• Decoded data is complete before callbacks run (#336, #355). Content-Transfer-Encoding decoders are finalized at the end of each part, and quoted-printable escapes split across writes decode correctly.
• parse_options_header lowercases content types with parameters (#287). Multipart/Form-Data; boundary=abc now returns multipart/form-data, the same as headers without parameters.

⚡ Faster parsing

• Faster opening boundary matching (#328). Complete boundaries are matched in one step.
• Faster parser state lookups (#330). Parser states are module-level enum members, so their repr is now multipart.END instead of <MultipartState.END: 12>.
• Faster querystring callback dispatch (#316).

🐍 Python support

• Python 3.10 is no longer supported (#329). Python 3.11 is now the minimum.
• Python 3.15 is supported (#350).

💜 Thank you

Thanks to @Edneam, @sungbin1015, @carlok, and @fjvbn2003 for contributing to this release.

Thanks to the individual sponsors who contributed $134.00 to support this work. If python-multipart is useful to you, consider sponsoring me on GitHub.

Full changelog: 0.0.32...0.0.33