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import io
from typing import Optional
import multipart
def get_body_from_form_data(
body: bytes, boundary: str
) -> tuple[Optional[bytes], dict[str, str]]:
body_stream = io.BytesIO(body)
parser = multipart.MultipartParser(body_stream, boundary=boundary)
data = None
headers: dict[str, str] = {}
for prt in parser.parts():
if prt.name == "upload_file":
headers["key"] = prt.name
data = prt.file.read()
else:
val = prt.file.read()
if prt.name == "file":
data = val
else:
headers[prt.name] = val.decode("utf-8")
return data, headers
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