python-multipart for file ingestion

A streaming multipart parser for Python that enables efficient file ingestion in high-performance frameworks like FastAPI and Starlette.

Python-multipart serves as the core parsing engine for multipart/form-data in modern asynchronous web services. It uses a state-machine architecture to process incoming streams byte-by-byte (minimizing memory spikes during 100MB+ file uploads). The library handles complex boundary delimiters and nested headers with precision: it is the primary dependency for Starlette's UploadFile implementation. Developers rely on its speed and low-level control to ingest binary data without blocking the event loop. This library remains the standard choice for production-grade file handling in the Python ecosystem.

https://github.com/Kludex/python-multipart