import hashlib
import re

from fastapi import UploadFile


safeName = re.compile(r"[^\w\d\.-]")

# If this gets too out of hand, put an async breakpoint to allow other things to be handled while the hash occurs
async def SHA256(f: UploadFile) -> str:
    sha = hashlib.sha256()
    while data := await f.read(65535):
        sha.update(data)
    await f.seek(0)
    return sha.hexdigest()