Browser caching issues in flask

Question

I have built a website using flask (www.csppdb.com). Sometimes when I log in as one user, log out, then login as another user I still see pages from the first user I logged

Answer 1

To stop browser caching on these sort of pages you need to set some HTTP response headers.

Cache-Control: no-cache, no-store
Pragma: no-cache

Once you do this then the browser wont cache those pages. I dont know how to do this with "flask" so I will leave that as an exercise for you :)

This question shows how to add a response header Flask/Werkzeug how to attach HTTP content-length header to file download

Answer 2

Setting the cache to be max-age=0 fixed it.

@app.after_request
def add_header(response):
    """
    Add headers to both force latest IE rendering engine or Chrome Frame,
    and also to cache the rendered page for 10 minutes.
    """
    response.headers['X-UA-Compatible'] = 'IE=Edge,chrome=1'
    response.headers['Cache-Control'] = 'public, max-age=0'
    return response