fastapi-users/docs/configuration/authentication/cookie.md

Cookie

Cookies are an easy way to store stateful information into the user browser. Thus, it is more useful for browser-based navigation (e.g. a front-end app making API requests) rather than pure API interaction.

Configuration

from fastapi_users.authentication import CookieAuthentication

SECRET = "SECRET"

auth_backends = []

cookie_authentication = CookieAuthentication(secret=SECRET, lifetime_seconds=3600))

auth_backends.append(cookie_authentication)

As you can see, instantiation is quite simple. You just have to define a constant SECRET which is used to encode the token and the lifetime of the cookie (in seconds).

You can optionally define the name which will be used to generate its /login route. Defaults to cookie.

cookie_authentication = CookieAuthentication(
    secret=SECRET,
    lifetime_seconds=3600,
    name="my-cookie",
)

You can also define the parameters for the generated cookie:

• cookie_name (fastapiusersauth): Name of the cookie.
• cookie_path (/): Cookie path.
• cookie_domain (None): Cookie domain.
• cookie_secure (True): Whether to only send the cookie to the server via SSL request.
• cookie_httponly (True): Whether to prevent access to the cookie via JavaScript.

!!! tip The value of the cookie is actually a JWT. This authentication backend shares most of its logic with the JWT one.

Login

This method will return a response with a valid set-cookie header upon successful login:

!!! success "200 OK"

Check documentation about login route.

Authentication

This method expects that you provide a valid cookie in the headers.

Next steps

We will now configure the main FastAPI Users object that will expose the API router.