Cookies are pieces of data which persist inside a user's browser. Sanic can both read and write cookies, which are stored as key-value pairs.

Reading cookies

A user's cookies can be accessed via the Request object's cookies dictionary.

from sanic.response import text

async def test(request):
    test_cookie = request.cookies.get('test')
    return text("Test cookie set to: {}".format(test_cookie))

Writing cookies

When returning a response, cookies can be set on the Response object.

from sanic.response import text

async def test(request):
    response = text("There's a cookie up in this response")
    response.cookies['test'] = 'It worked!'
    response.cookies['test']['domain'] = ''
    response.cookies['test']['httponly'] = True
    return response

Deleting cookies

Cookies can be removed semantically or explicitly.

from sanic.response import text

async def test(request):
    response = text("Time to eat some cookies muahaha")

    # This cookie will be set to expire in 0 seconds
    del response.cookies['kill_me']

    # This cookie will self destruct in 5 seconds
    response.cookies['short_life'] = 'Glad to be here'
    response.cookies['short_life']['max-age'] = 5
    del response.cookies['favorite_color']

    # This cookie will remain unchanged
    response.cookies['favorite_color'] = 'blue'
    response.cookies['favorite_color'] = 'pink'
    del response.cookies['favorite_color']

    return response

Response cookies can be set like dictionary values and have the following parameters available:

  • expires (datetime): The time for the cookie to expire on the client's browser.
  • path (string): The subset of URLs to which this cookie applies. Defaults to /.
  • comment (string): A comment (metadata).
  • domain (string): Specifies the domain for which the cookie is valid. An explicitly specified domain must always start with a dot.
  • max-age (number): Number of seconds the cookie should live for.
  • secure (boolean): Specifies whether the cookie will only be sent via HTTPS.
  • httponly (boolean): Specifies whether the cookie cannot be read by Javascript.