Flask: How to remove cookies?

Question

I set cookies with the code suggested in the docs:

from flask import make_response

@app.route(\'/\')
def index():
    resp = make_response(render_template(.         


        

Answer 1

You need to set the cookie with an expiry that's in the past.

resp = make_response(render_template(...))
resp.set_cookie('username', expires=0)
return resp

By the way, I hope you don't actually expect that username cookie to be safe. Because it's not. The user can put anything he wants in there. The solution is usually to use the Flask session which uses a signed cookie that cannot be modified by the user.