Аплоад и сохранение файла без мусора?

class StatsUploadView(APIView):
    parser_classes = (FileUploadParser,)

    def put(self, request, filename, format=None):
        file = request.FILES['file']
        handle_uploaded_file(file)

        return Response(status=204)

def handle_uploaded_file(f):
    with open(os.path.join(BASE_DIR, UPLOAD_DIR, str(f)), 'wb+') as destination:
        for chunk in f:
            destination.write(chunk)

----------------------------726058897001843495472131
Content-Disposition: form-data; name="file"; filename="test.txt"
Content-Type: text/plain

Здесь текст файла

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