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Web example: Login with warp, ructe, and diesel

This application is intended as an example of a web service handling a login session. It uses the warp web framework, the ructe template engine and the diesel database layer.

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A Session object is created for each request (except for static resources), containing a handle to a database connection pool and an Option<User> that is set if the user is logged in.

The authentication are done with bcrypt verification of hashed passwords (the hashes are stored in the database, passwords are never stored or logged in plain text).

When authenticated, the user gets a cookie (httponly, strict samesite) containing a session key, which is used for authentication through the remainder of the session.

Things that could use improvement:

  • The routing provieded by warp is very nice, but it would be nice to be able to define routers and subrouters in a more tree-like way. Perhaps it is possible, and I just havn't found out how yet?

  • I have probably missed something in how errors are supposed to be handled in warp. It feels like I am wrapping Results in Results, and I use more .map_err(...) than I like.

  • Database is not really handled asyncronously yet, so database accesses blocks the worker. See https://github.com/diesel-rs/diesel/issues/399 for information.

Things that remains to be done:

  • Session keys should have a limited age. Maybe doing a request after half that time should generate a new session key?

  • The code that handles the authentication and sessions should be externalized to a separate crate, but the session data should remain application-specific. Generating and verifying the bcrypt hashes and session keys should be done by the external crate, but actually storing them in the database, including migrations to create the tables, should be done by the application.

  • CSRF protection is not yet implemented.

This project was partially inspired by https://github.com/rust-lang-nursery/wg-net/issues/44 ; go there for more example projects.

Issue reports and pull requests and welcomed.

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Example web app with login session using warp, diesel and ructe

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