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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
33 lines
1.1 KiB
Markdown
33 lines
1.1 KiB
Markdown
# Create a backend
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As we said, a backend is the combination of a transport and a strategy. That way, you can create a complete strategy exactly fitting your needs.
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For this, you have to use the `AuthenticationBackend` class.
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```py
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from fastapi_users.authentication import AuthenticationBackend, BearerTransport, JWTStrategy
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SECRET = "SECRET"
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bearer_transport = BearerTransport(tokenUrl="auth/jwt/login")
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def get_jwt_strategy() -> JWTStrategy:
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return JWTStrategy(secret=SECRET, lifetime_seconds=3600)
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auth_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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```
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As you can see, instantiation is quite simple. It accepts the following arguments:
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* `name` (`str`): Name of the backend. Each backend should have a unique name.
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* `transport` (`Transport`): An instance of a `Transport` class.
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* `get_strategy` (`Callable[..., Strategy]`): A dependency callable returning an instance of a `Strategy` class.
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## Next steps
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You can have as many authentication backends as you wish. You'll then have to pass those backends to your `FastAPIUsers` instance and generate an auth router for each one of them.
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