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Implementation of Flask-login on top of Dash.

License: MIT License

Python 90.17% Jupyter Notebook 9.83%

dash plotly flask flask-login

dash-flask-login's Introduction

dash-flask-login

This is an example of Flask-login implementation on top of a Dash application for users authentication.

The example comes with users authentication through a sqlite3 database, however you can use your own database by changing the con parameter with your database URI in the config.txt file.

The example comes with the a standard username test and password test1 but you can add more users using the add_remove_users.ipynb jupyter notebook or the functions available in the users_mgt.py.

Files description:

add_remove_users.ipynb: A jupyter notebook to help creating and removing users
app.py: The app initial screen
config.py: python script to initialize the configuration included in the config.txt file
config.txt: configuration file
requirements.in: input configuration file to be used together with pip-tools
requirements.txt: configuration file generated bypip-tools
server.py: the app initialization file
users.db: sqlite3 database with user information
users_mgt.py: helper file for the user management process

Running an app locally

To run an app locally:

(optional) create and activate new virtualenv:

pip install virtualenv
virtualenv venv
source venv/bin/activate

pip install -r requirements.txt
flask run or gunicorn wsgi:application
open http://127.0.0.1:5000 in your browser or
flask run --host=0.0.0.0 or gunicorn --bind 0.0.0.0:8000 wsgi:application to open for external connections

Deployng to Heroku

Install Heroku CLI: https://devcenter.heroku.com/articles/heroku-cli
Login to your heroku account: heroku login
Create the app: heroku create
Deploy to Heroku: git push heroku master
Access the app via the address provided by Heroku

Contributing

PRs accepted! Please contribute if you believe this example can be improved.

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dash-flask-login's Issues

File contains no section headers.

Hello,

I found some posts about dash authentication here:

https://community.plot.ly/t/get-username-for-authenticated-user-for-basic-auth/13613

and it’s almost working. I keep getting this error:

File “c:\users\User\appdata\local\programs\python\python37\lib\configparser.py”, line 696, in read
self._read(fp, filename)
File “c:\users\User\appdata\local\programs\python\python37\lib\configparser.py”, line 1079, in _read
raise MissingSectionHeaderError(fpname, lineno, line)
configparser.MissingSectionHeaderError: File contains no section headers.
file: ‘config.txt’, line: 1
‘ď»ż[database]\n’

I decided to start leraning Python/Dash. I am trying to replicate stuff that I did in Excel/Vba using Dash. However I am a beginner without programming backrgoud (I worked on Excel, SAS, SAP…) so many definitions don’t say anything to me.

Also, how can I connect my main app (lets say it’s Dash.py) with your part and retrive user name?

I would very much appreciate if you could get back to me and maybe help me run your code.

BR
Krzyszsz

Dropdown menu's not working with Flask authentication

I am using this repository to create a multi-user authenticated app.

Everything seems to work fine individually, and I can get individual graphs working but when I have more than a dropdown menu the second dependent menu will not populate.
It actually appears no dropdown example will work, even the basic dropdown example.

Any help or a workaround would be greatly appreciated

Login on Enter Button press

Dear Rafael,

this is a nice project and I have a question to you.

Do you know how to "login" by pressing the "Enter" Button?

Would be great to receive support from you.

Best regards

issue with gunicorn

when I deploy this app with gunicorn and assign more than one worker, the judgement current_user.is_authenticated does not work from tome to time.
Althorough I have logged in, and the url is /success, the page content is /login_fd

Comment

Thanks for making this repo.
I found it helpful and used it to make an alternative public version that suits my needs on Gitlab.
If you want to merge my repo into yours that's fine, and just let me know.
Otherwise i'll keep it as a separate repo.

Cheers.

LDAP / Kerberos support

Hi @RafaelMiquelino
I am starting to play with your example and plan to add LDAP / Kerberos support.
Do you have any experience with one or the other?

Elastic Beanstalk

Hi, I would like to upload an app based on your style to elastic beanstalk.

I understand that for that we need two lines
application = app.server

And then:

if name == 'main':
application.run_server(debug=True, port=8080)

when I try do this by changing "server = app.server" in serve.py to application and then using the above line it doesn't work. I was wondering if you were able to advise how to go about deploying on AWS Elastic Beanstalk.

Many thanks in advance!

flask login with multi-page dash application

This seems to work when app.layout is defined in app.py. My application is a multi-page dash app and routing is different from a single page app. i.e In my case index.py contains the app.layout. My dash application doesn't load when I authenticate user and click on the link to App.

Details here: https://community.plotly.com/t/flask-integration-with-dash-app-routing/53801/3

current_user.is_authenticated returns false in deployment

Hello,

Thanks for making this repository.

I have been using it with success on a localhost, but as soon as I deploy it, on a hosted server, the user authentication stops behaving. As the user logs in, it registers that the user is authenticated, but within less than a 1s the bool current_user.is_authenticated is set to false.

I have tried everything, and this problem is consistent for my code, that includes the code from this repository, and if one puts this repository on a server and runs it.

Thanks and all the best,
Max H

Two proposals

Hi Rafael,

Very great job! thanks a lot.

I suggest two 2 things.

1° If you want to change the table name use " tablename" in "Class User()" as you can see below:
class User(db.Model):
tablename = 'utilisateurs'
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(15), unique=True)
password = db.Column(db.String(80))

And if you want use MySQL instead SQLite you can change the 'con' string
like this :
con = mysql+pymysql://os.environ.get('user'):os.environ.get('mpd')@localhost:3306/os.environ.get('db')

But it's not possible to interpret os.environ value and the connection failed, have you an issue for this, myself it try to use "eval" without success. I put directly the con string in SQLALCHEMY_DATABASE_URI and engine = create_engine(...)

Another little thing, config.read('config.txt') needs the current path to find the config.txt with os.chdir even the txt file is in the same directory than config.py.

Sorry for my english,

Swift