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84 lines
2.8 KiB
Markdown
84 lines
2.8 KiB
Markdown
# Authentication
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**FastAPI Users** allows you to plug in several authentication methods.
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## How it works?
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You can have **several** authentication methods, e.g. a cookie authentication for browser-based queries and a JWT token authentication for pure API queries.
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When checking authentication, each method is run one after the other. The first method yielding a user wins. If no method yields a user, an `HTTPException` is raised.
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For each backend, you'll be able to add a router with the corresponding `/login` and `/logout`. More on this in the [routers documentation](../routers/index.md).
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## Transport + Strategy = Authentication backend
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An authentication backend is composed of two parts:
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### Transport
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It manages how the token will be carried over the request. We currently provide two methods:
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#### [Bearer](transports/bearer.md)
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The token will be send through an `Authorization: Bearer` header.
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!!! tip "Pros and cons"
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* ✅ Easy to read and set in every requests.
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* ❌ Needs to be stored manually somewhere in the client.
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➡️ Use it if you want to implement a mobile application or a pure REST API.
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#### [Cookie](transports/cookie.md)
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The token will be send through a cookie.
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!!! tip "Pros and cons"
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* ✅ Automatically stored and sent securely by web browsers in every requests.
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* ✅ Automatically removed at expiration by web browsers.
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* ❌ Needs a CSRF protection for maximum security.
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* ❌ Harder to work with outside a browser, like a mobile app or a server.
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➡️ Use it if you want to implement a web frontend.
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### Strategy
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It manages how the token is generated and secured. We currently provide two methods:
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#### [JWT](strategies/jwt.md)
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The token is self-contained in a JSON Web Token.
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!!! tip "Pros and cons"
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* ✅ Self-contained: it doesn't need to be stored in a database.
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* ❌ Can't be invalidated on the server-side: it's valid until it expires.
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➡️ Use it if you want to get up-and-running quickly.
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#### [Database](strategies/database.md)
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The token is stored in a table (or collection) in your database.
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!!! tip "Pros and cons"
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* ✅ Secure and performant.
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* ✅ Tokens can be invalidated server-side by removing them from the database.
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* ✅ Highly customizable: add your own fields, create an API to retrieve the active sessions of your users, etc.
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* ❌ Configuration is a bit more complex.
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➡️ Use it if you want maximum flexibility in your token management.
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#### [Redis](strategies/redis.md)
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The token is stored in a Redis key-store.
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!!! tip "Pros and cons"
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* ✅ Secure and performant.
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* ✅ Tokens can be invalidated server-side by removing them from Redis.
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* ❌ A Redis server is needed.
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➡️ Use it if you want maximum performance while being able to invalidate tokens.
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