from flask_wtf import FlaskForm from flask_wtf.file import FileField, FileAllowed, FileRequired from wtforms import StringField, PasswordField, BooleanField, SubmitField class UploadForm(FlaskForm): uploadFile = FileField('file', validators=[ FileRequired(message="You must specify to upload"), FileAllowed(['txt', 'gz', 'zip', 'log'], 'Log files only!') ]) submit = SubmitField('Upload')