Allocation of Resources Without Limits or Throttling

Summary

Starlette is a lightweight ASGI (Asynchronous Server Gateway Interface) framework/toolkit, designed for building async web services in Python. In versions prior 0.47.2 , when parsing a multi-part form with large files (greater than the default max spool size) starlette will block the main thread to roll the file over to disk. This blocks the event thread which means the application can't accept new connections. The "UploadFile" code has a minor bug where instead of just checking for "self._in_memory," the logic should also check if the additional bytes will cause a rollover.