[FLASK] IMPORT FILE AJAX

from werkzeug.utils import secure_filename
import os

UPLOAD_FOLDER = 'static/tmp/projects/'
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif', 'csv', 'xlsx', 'xls'])

app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

def allowed_file(filename):
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

@app.route('/processar-etapa1', methods=['GET', 'POST'])
def processar_etapa1():
file = request.files.get('myfile')
if file:
  filename = secure_filename(file.filename)
  file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
  print('salvo')
else:
  print('erro', file)