CODEWITHSUNDEEP
cookiesflaskpersistent
joost2076
joost2076

Reputation: 101

set persistent cookie with python flask

I'm trying to use a cookie to remember if a visitor has already seen a particular tutorial page on my site. The site is build using Flask.

The tutorial page gets loaded from flask routing so I thought it made sense to try and alter the cookie in the flask routing definition using the make_response and response.set_cookie function from the flask framework.

However, this (session) cookie is only for the duration of the session. I can't find any info on setting permanent/persistent cookies with flask. How can I do this with flask ?

Thanks!

Upvotes: 1

Views: 4500

Answers (1)

Vincent J
Vincent J

Reputation: 5808

To set a persistent cookie, you must add the "expires" field in the http header:

Set-Cookie: <cookie-name>=<cookie-value>; Expires=<date>

If you don't provide Expires=, then the browser considers the cookie as a "session" cookie and deletes the cookie when the browser is closed.

For Flask, you can use the parameter expires= of the response.set_cookie() function like this for a 30-days cookie:

import datetime
response.set_cookie(name, value,
                    expires=datetime.datetime.now() + datetime.timedelta(days=30))

Upvotes: 9

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