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Flask route handler that logs out the current user by clearing their session data and redirecting them to the login page.

Purpose

This function handles user logout functionality in a Flask web application. It clears all session data to terminate the user's authenticated session and redirects them to the login page. The function checks for Azure SSO availability but currently redirects to login in both cases.

Source Code

def logout():
    """Logout"""
    session.clear()
    if AZURE_SSO_AVAILABLE:
        return redirect(url_for('login'))
    else:
        return redirect(url_for('login'))

Return Value

Returns a Flask redirect response object that redirects the user to the 'login' route. The redirect is the same regardless of whether Azure SSO is available or not.

Dependencies

• flask

Required Imports

from flask import session
from flask import redirect
from flask import url_for

Conditional/Optional Imports

These imports are only needed under specific conditions:

from auth.azure_auth import AzureSSO

Usage Example

from flask import Flask, session, redirect, url_for

app = Flask(__name__)
app.secret_key = 'your-secret-key-here'
AZURE_SSO_AVAILABLE = False

@app.route('/logout')
def logout():
    """Logout"""
    session.clear()
    if AZURE_SSO_AVAILABLE:
        return redirect(url_for('login'))
    else:
        return redirect(url_for('login'))

@app.route('/login')
def login():
    return 'Login Page'

# User accesses /logout endpoint
# Session is cleared and user is redirected to /login

Best Practices

• Ensure Flask app has a SECRET_KEY configured for session management to work properly
• The function currently has redundant conditional logic (both branches redirect to login) - consider simplifying or implementing different behavior for Azure SSO logout
• Consider adding flash messages to inform users they have been logged out successfully
• For Azure SSO, consider implementing proper SSO logout flow that clears SSO session as well
• Ensure the login route exists and is properly configured before deploying this logout function
• Consider adding CSRF protection if not already implemented at the application level
• May want to add logging to track logout events for security auditing purposes

Tags

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