Envio de arquivos com Flask e socket.io

file_upload.py

from flask_cors import CORS

socketio = SocketIO()
app = Flask(__name__)

CORS(app)
# CONFIGURACAO
socketio.init_app(app, ping_timeout=1800, binary=True, max_http_buffer_size=10000000000)


# RECEBE O ARQUIVO AOS PEDAÇOS
@socketio.on('write-chunk')
def write_chunk(filename, offset, data):
    folder = os.path.join('dir', 'my_folder')
    try:
        with open(os.path.join(folder, filename), 'r+b') as f:
            f.seek(offset)
            f.write(data)
    except IOError:
        nome, ext = os.path.splitext(filename)
        os.remove(os.path.join(folder, filename))
        return False
    return True


# AO FINALIZAR O ENVIO AOS PEDAÇOS É ACIONADO ESSE EVENTO PARA PROCESSAR O ARQUIVO 
@socketio.on('create_doc')
def task_create_doc(filename, token):
    folder = os.path.join('dir', 'my_folder')
    nome, ext = os.path.splitext(filename)
    file_buff = open(os.path.join(folder, filename), 'rb')
    file = file_buff.read()
    file_buff.close()
    filename = os.path.join(folder, filename)
    socketio.start_background_task(target=create_doc(file, data, filename))


# AQUI PROCESSA EM BACKGROUND E RESPONDE AO CLIENTE SOLICITANTE
def create_doc(file, data, filename):
	# ...
  emit('resposta_client', 'mensagem', broadcast=False)




# CONFIGURACAO DO SUPERVISOR
command=/DIR/gunicorn --worker-class eventlet -t 1800 -w 1 --log-file=- -b 0.0.0.0:9999 web:app