Dash Authorization Package.
Project description
Dash Authorization and Login
Docs: https://dash.plotly.com/authentication
License: MIT
Tests:
For local testing, create a virtualenv, install the dev requirements, and run individual tests or test classes:
python -m venv venv
. venv/bin/activate
pip install -r dev-requirements.txt
python -k ba001
Note that Python 3.8 or greater is required.
Usage
Basic Authentication
To add basic authentication, add the following to your Dash app:
from dash import Dash
from dash_auth import BasicAuth
app = Dash(__name__)
USER_PWD = {
"username": "password",
"user2": "useSomethingMoreSecurePlease",
}
BasicAuth(app, USER_PWD)
One can also use an authorization python function instead of a dictionary/list of usernames and passwords:
from dash import Dash
from dash_auth import BasicAuth
def authorization_function(username, password):
if (username == "hello") and (password == "world"):
return True
else:
return False
app = Dash(__name__)
BasicAuth(app, auth_func = authorization_function)
Public routes
You can whitelist routes from authentication with the add_public_routes utility function,
or by passing a public_routes argument to the Auth constructor.
The public routes should follow Flask's route syntax.
from dash import Dash
from dash_auth import BasicAuth, add_public_routes
app = Dash(__name__)
USER_PWD = {
"username": "password",
"user2": "useSomethingMoreSecurePlease",
}
BasicAuth(app, USER_PWD, public_routes=["/"])
add_public_routes(app, public_routes=["/user/<user_id>/public"])
NOTE: If you are using server-side callbacks on your public routes, you should also use dash_auth's new public_callback rather than the default Dash callback.
Below is an example of a public route and callbacks on a multi-page Dash app using Dash's pages API:
app.py
from dash import Dash, html, dcc, page_container
from dash_auth import BasicAuth
app = Dash(__name__, use_pages=True, suppress_callback_exceptions=True)
USER_PWD = {
"username": "password",
"user2": "useSomethingMoreSecurePlease",
}
BasicAuth(app, USER_PWD, public_routes=["/", "/user/<user_id>/public"])
app.layout = html.Div(
[
html.Div(
[
dcc.Link("Home", href="/"),
dcc.Link("John Doe", href="/user/john_doe/public"),
],
style={"display": "flex", "gap": "1rem", "background": "lightgray", "padding": "0.5rem 1rem"},
),
page_container,
],
style={"display": "flex", "flexDirection": "column"},
)
if __name__ == "__main__":
app.run_server(debug=True)
pages/home.py
from dash import Input, Output, html, register_page
from dash_auth import public_callback
register_page(__name__, "/")
layout = [
html.H1("Home Page"),
html.Button("Click me", id="home-button"),
html.Div(id="home-contents"),
]
# Note the use of public callback here rather than the default Dash callback
@public_callback(
Output("home-contents", "children"),
Input("home-button", "n_clicks"),
)
def home(n_clicks):
if not n_clicks:
return "You haven't clicked the button."
return "You clicked the button {} times".format(n_clicks)
pages/public_user.py
from dash import html, dcc, register_page
register_page(__name__, path_template="/user/<user_id>/public")
def layout(user_id: str):
return [
html.H1(f"User {user_id} (public)"),
dcc.Link("Authenticated user content", href=f"/user/{user_id}/private"),
]
pages/private_user.py
from dash import html, register_page
register_page(__name__, path_template="/user/<user_id>/private")
def layout(user_id: str):
return [
html.H1(f"User {user_id} (authenticated only)"),
html.Div("Members-only information"),
]
OIDC Authentication
To add authentication with OpenID Connect, you will first need to set up an OpenID Connect provider (IDP). This typically requires creating
- An application in your IDP
- Defining the redirect URI for your application, for testing locally you can use http://localhost:8050/oidc/callback
- A client ID and secret for the application
Once you have set up your IDP, you can add it to your Dash app as follows:
from dash import Dash
from dash_auth import OIDCAuth
app = Dash(__name__)
auth = OIDCAuth(app, secret_key="aStaticSecretKey!")
auth.register_provider(
"idp",
token_endpoint_auth_method="client_secret_post",
# Replace the below values with your own
# NOTE: Do not hardcode your client secret!
client_id="<my-client-id>",
client_secret="<my-client-secret>",
server_metadata_url="<my-idp-.well-known-configuration>",
)
Once this is done, connecting to your app will automatically redirect to the IDP login page.
Multiple OIDC Providers
For multiple OIDC providers, you can use register_provider to add new ones after the OIDCAuth has been instantiated.
from dash import Dash, html
from dash_auth import OIDCAuth
from flask import request, redirect, url_for
app = Dash(__name__)
app.layout = html.Div([
html.Div("Hello world!"),
html.A("Logout", href="/oidc/logout"),
])
auth = OIDCAuth(
app,
secret_key="aStaticSecretKey!",
# Set the route at which the user will select the IDP they wish to login with
idp_selection_route="/login",
)
auth.register_provider(
"IDP 1",
token_endpoint_auth_method="client_secret_post",
client_id="<my-client-id>",
client_secret="<my-client-secret>",
server_metadata_url="<my-idp-.well-known-configuration>",
)
auth.register_provider(
"IDP 2",
token_endpoint_auth_method="client_secret_post",
client_id="<my-client-id2>",
client_secret="<my-client-secret2>",
server_metadata_url="<my-idp2-.well-known-configuration>",
)
@app.server.route("/login", methods=["GET", "POST"])
def login_handler():
if request.method == "POST":
idp = request.form.get("idp")
else:
idp = request.args.get("idp")
if idp is not None:
return redirect(url_for("oidc_login", idp=idp))
return """<div>
<form>
<div>How do you wish to sign in:</div>
<select name="idp">
<option value="IDP 1">IDP 1</option>
<option value="IDP 2">IDP 2</option>
</select>
<input type="submit" value="Login">
</form>
</div>"""
if __name__ == "__main__":
app.run_server(debug=True)
User-group-based permissions
dash_auth provides a convenient way to secure parts of your app based on user groups.
The following utilities are defined:
list_groups: Returns the groups of the current user, or None if the user is not authenticated.check_groups: Checks the current user groups against the provided list of groups. Available group checks areone_of,all_ofandnone_of. The function returns None if the user is not authenticated.protected: A function decorator that modifies the output if the user is unauthenticated or missing group permission.protected_callback: A callback that only runs if the user is authenticated and with the right group permissions.
NOTE: user info is stored in the session so make sure you define a secret_key on the Flask server to use this feature.
If you wish to use this feature with BasicAuth, you will need to define the groups for individual basicauth users:
from dash_auth import BasicAuth
app = Dash(__name__)
USER_PWD = {
"username": "password",
"user2": "useSomethingMoreSecurePlease",
}
BasicAuth(
app,
USER_PWD,
user_groups={"user1": ["group1", "group2"], "user2": ["group2"]},
secret_key="Test!",
)
# You can also use a function to get user groups
def check_user(username, password):
if username == "user1" and password == "password":
return True
if username == "user2" and password == "useSomethingMoreSecurePlease":
return True
return False
def get_user_groups(user):
if user == "user1":
return ["group1", "group2"]
elif user == "user2":
return ["group2"]
return []
BasicAuth(
app,
auth_func=check_user,
user_groups=get_user_groups,
secret_key="Test!",
)
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