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c4de66b81c
* Implement Transport classes * Implement authentication strategy classes * Revamp authentication with Transport and Strategy * Revamp strategy and OAuth so that they can use a callable dependency * Update docstring * Make ErrorCode a proper Enum and cleanup unused OpenAPI utils * Remove useless check * Tweak typing in authenticator * Update docs * Improve logout/destroy token logic * Update docs * Update docs * Update docs and full examples * Apply formatting to examples * Update OAuth doc and examples * Add migration doc * Implement Redis session token * Add Redis Session documentation * RedisSession -> Redis * Fix links in docs
127 lines
4.7 KiB
Markdown
127 lines
4.7 KiB
Markdown
# Get current user
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**FastAPI Users** provides a dependency callable to easily inject authenticated user in your routes. They are available from your `FastAPIUsers` instance.
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!!! tip
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For more information about how to make an authenticated request to your API, check the documentation of your [Authentication method](../configuration/authentication/index.md).
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## `current_user`
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Return a dependency callable to retrieve currently authenticated user, passing the following parameters:
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* `optional`: If `True`, `None` is returned if there is no authenticated user or if it doesn't pass the other requirements. Otherwise, throw `401 Unauthorized`. Defaults to `False`.
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* `active`: If `True`, throw `401 Unauthorized` if the authenticated user is inactive. Defaults to `False`.
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* `verified`: If `True`, throw `403 Forbidden` if the authenticated user is not verified. Defaults to `False`.
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* `superuser`: If `True`, throw `403 Forbidden` if the authenticated user is not a superuser. Defaults to `False`.
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* `get_enabled_backends`: Optional dependency callable returning a list of enabled authentication backends. Useful if you want to dynamically enable some authentication backends based on external logic, like a configuration in database. By default, all specified authentication backends are enabled. *Please not however that every backends will appear in the OpenAPI documentation, as FastAPI resolves it statically.*
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!!! tip "Create it once and reuse it"
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This function is a **factory**, a function returning another function 🤯
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It's this returned function that will be the dependency called by FastAPI in your API routes.
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To avoid having to generate it on each route and avoid issues when unit testing, it's **strongly recommended** that you assign the result in a variable and reuse it at will in your routes. The examples below demonstrate this pattern.
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## Examples
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### Get the current user (**active or not**)
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```py
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current_user = fastapi_users.current_user()
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@app.get("/protected-route")
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def protected_route(user: User = Depends(current_user)):
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return f"Hello, {user.email}"
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```
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### Get the current **active** user
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```py
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current_active_user = fastapi_users.current_user(active=True)
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@app.get("/protected-route")
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def protected_route(user: User = Depends(current_active_user)):
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return f"Hello, {user.email}"
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```
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### Get the current **active** and **verified** user
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```py
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current_active_verified_user = fastapi_users.current_user(active=True, verified=True)
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@app.get("/protected-route")
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def protected_route(user: User = Depends(current_active_verified_user)):
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return f"Hello, {user.email}"
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```
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### Get the current active **superuser**
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```py
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current_superuser = fastapi_users.current_user(active=True, superuser=True)
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@app.get("/protected-route")
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def protected_route(user: User = Depends(current_superuser)):
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return f"Hello, {user.email}"
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```
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### Dynamically enable authentication backends
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!!! warning
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This is an advanced feature for cases where you have several authentication backends that are enabled conditionally. In most cases, you won't need this option.
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```py
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from fastapi import Request
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from fastapi_users.authentication import AuthenticationBackend, BearerTransport, CookieTransport, JWTStrategy
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SECRET = "SECRET"
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bearer_transport = BearerTransport(tokenUrl="auth/jwt/login")
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cookie_transport = CookieTransport(cookie_max_age=3600)
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def get_jwt_strategy() -> JWTStrategy:
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return JWTStrategy(secret=SECRET, lifetime_seconds=3600)
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jwt_backend = AuthenticationBackend(
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name="jwt",
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transport=bearer_transport,
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get_strategy=get_jwt_strategy,
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)
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cookie_backend = AuthenticationBackend(
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name="jwt",
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transport=cookie_transport,
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get_strategy=get_jwt_strategy,
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)
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async def get_enabled_backends(request: Request):
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"""Return the enabled dependencies following custom logic."""
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if request.url.path == "/protected-route-only-jwt":
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return [jwt_backend]
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else:
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return [cookie_backend, jwt_backend]
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current_active_user = fastapi_users.current_user(active=True, get_enabled_backends=get_enabled_backends)
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@app.get("/protected-route")
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def protected_route(user: User = Depends(current_active_user)):
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return f"Hello, {user.email}. You are authenticated with a cookie or a JWT."
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@app.get("/protected-route-only-jwt")
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def protected_route(user: User = Depends(current_active_user)):
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return f"Hello, {user.email}. You are authenticated with a JWT."
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```
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## In a path operation
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If you don't need the user in the route logic, you can use this syntax:
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```py
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@app.get("/protected-route", dependencies=[Depends(current_superuser)])
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def protected_route():
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return "Hello, some user."
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```
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You can read more about this [in FastAPI docs](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-in-path-operation-decorators/).
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