python - How to stream upload a file using multipart/form-data -

i trying hug receive multipart/form-data post request , stream body in chunks straight disk. able upload stream large binary file using application/octet-stream post method. here hug method:

@hug.post('/upload',versions=1,requires=cors_support) def upload_file(body,request,response):     gunicorn.http.body import body     """receives stream of bytes , writes them file     name provided in request header."""     # if content-type multipart/form-data,     # body dictionary. load     # whole thing memory before writing     # disk.     if type(body) == dict:         filename = body['filename']         filebody = body['file']         open(filename,'wb') f:             f.write(filebody)     # if content-type application/octet-stream     # body gunicorn.http.body.body.     # file-like object streamed ,     # written in chunks.     elif type(body) == body:         filename = request.headers['filename']         chunksize = 4096         open(filename,'wb') f:             while true:                 chunk = body.read(chunksize)                 if not chunk:                     break                 f.write(chunk)     return 

and here curl snippet:

url=http://localhost:8000/v1/upload filename=largefile.dat  curl -v -h "filename: $filename" \         -h "content-type: application/octet-stream" \         --data-binary @$filename -x post $url 

the above works , i'm able stream upload file because in upload_file function, body gunicorn.http.body.body instance able stream straight disk in chunks.

however need able upload files browser, sends multipart/form-data post request. emulate curl, do:

url=http://localhost:8000/v1/upload filename=largefile.dat  curl -v -h "filename: $filename" \         -h "content-type: multipart/form-data" \         -f "filename=$filename" \         -f "file=@$filename;type=application/octet-stream" \     -x post $url 

this time, in hug, body dictionary, , body['file'] bytes instance. don't know how stream disk without loading whole thing in memory first.

is there way obtain body file object stream straight disk?