103 lines
2.9 KiB
Python
Executable file
103 lines
2.9 KiB
Python
Executable file
#!/usr/bin/python3
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"""Single sign-on application."""
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import functools
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import typing
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from datetime import datetime, timedelta
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from typing import Any, Callable
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import flask
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import werkzeug
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import UniAuth.auth
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app = flask.Flask(__name__)
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app.debug = True
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app.config.from_object("config.default")
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def login_required(f: Callable[..., Any]) -> Callable[..., Any]:
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"""Route requires login decorator."""
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@functools.wraps(f)
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def decorated_function(*args, **kwargs) -> werkzeug.Response: # type: ignore
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token = flask.request.cookies.get("auth_token")
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if not token or UniAuth.auth.verify_auth_token(token) is None:
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# Save the original URL in the session and redirect to login
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flask.session["next"] = flask.request.url
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return flask.redirect(flask.url_for("login_page"))
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return typing.cast(werkzeug.Response, f(*args, **kwargs))
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return decorated_function
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@app.route("/")
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@login_required
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def root_page() -> str:
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"""Root page."""
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return flask.render_template("auth_good.html")
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def check_user_auth() -> dict[str, Any] | None:
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"""Load username and password and check if valid."""
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# Extract username and password from POST request
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username = flask.request.form.get("username", type=str)
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password = flask.request.form.get("password", type=str)
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# Retrieve users from app config
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users = app.config["USERS"]
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# Check if the username and password match any user in the list
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return next(
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(u for u in users if u["username"] == username and u["password"] == password),
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None,
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)
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@app.route("/login", methods=["GET", "POST"])
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def login_page() -> str | werkzeug.Response:
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"""Login page."""
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if flask.request.method == "GET":
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return flask.render_template("login.html")
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if not (user := check_user_auth()):
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# Login failed: Show an error message on the login page
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return flask.render_template("login.html", error="Invalid credentials")
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redirect_to = (
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flask.request.args.get("next")
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or flask.session.get("next")
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or flask.url_for("dashboard")
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)
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expire_date = datetime.now() + timedelta(days=180)
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flask.flash("Welcome back! You have successfully logged in.")
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token = UniAuth.auth.generate_auth_token(user["username"])
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response = flask.redirect(redirect_to)
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response.set_cookie(
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"auth_token",
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token,
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expires=expire_date,
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httponly=True,
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secure=True,
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samesite="Lax",
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)
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return response
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@app.route("/logout")
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def logout() -> werkzeug.Response:
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"""Handle user logout by clearing the authentication cookie."""
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after_login = flask.request.args.get("next")
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response = flask.redirect(flask.url_for("login_page", next=after_login))
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response.set_cookie("auth_token", "", expires=0)
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flask.flash("You have been successfully logged out.", "info")
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return response
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if __name__ == "__main__":
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app.run(host="0.0.0.0")
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