Rework actix session (#212)

Co-authored-by: Rob Ede <robjtede@icloud.com>
Co-authored-by: Luca P <rust@lpalmieri.com>
Co-authored-by: Sebastian Rollén <38324289+SebRollen@users.noreply.github.com>

actix-session/CHANGES.md

@@ -2,6 +2,23 @@
 
 ## Unreleased - 2021-xx-xx
 
+### Added
+- `SessionMiddleware`, a middleware to provide support for saving/updating/deleting session state against a pluggable storage backend (see `SessionStore` trait) [#212]
+- `CookieSessionStore`, a cookie-based backend to store session state [#212]
+- `RedisActorSessionStore`, a Redis-based backend to store session state powered by `actix-redis` [#212]
+- `RedisSessionStore`, a Redis-based backend to store session state powered by `redis-rs` [#212]
+- Add TLS support for Redis via `RedisSessionStore` [#212]
+- Implement `SessionExt` for `ServiceResponse` [#212]
+
+### Changed
+- Rename `UserSession` to `SessionExt` [#212]
+
+### Removed
+- `CookieSession` has been removed in favour of `CookieSessionStore`, a storage backend for `SessionMiddleware` [#212]
+- `Session::set_session` has been removed. Use `Session::insert` to modify the session state. [#212]
+  
+[#212]: https://github.com/actix/actix-extras/pull/212
+
 
 ## 0.5.0 - 2022-03-01
 - Update `actix-web` dependency to `4`.
@@ -27,7 +44,9 @@
 ## 0.5.0-beta.5 - 2021-12-12
 - Update `actix-web` dependency to `4.0.0.beta-14`. [#209]
 - Remove `UserSession` implementation for `RequestHead`. [#209]
+- A session will be created in the storage backend if and only if there is some data inside the session state. This reduces the performance impact of `SessionMiddleware` on routes that do not leverage sessions. [#207]
 
+[#207]: https://github.com/actix/actix-extras/pull/207
 [#209]: https://github.com/actix/actix-extras/pull/209