axum/axum-macros/tests/from_request/pass/state_with_rejection.rs
David Pedersen c3f3db79ec
Support State with #[derive(FromRequest[Parts])] (#1391)
* Support `State` with `#[derive(FromRequest[Parts])]`

Fixes https://github.com/tokio-rs/axum/issues/1314

This makes it possible to extract things via `State` in
`#[derive(FromRequet)]`:

```rust
struct Foo {
    state: State<AppState>,
}
```

The state can also be inferred in a lot of cases so you only need to
write:

```rust
struct Foo {
    // since we're using `State<AppState>` we know the state has to be
    // `AppState`
    state: State<AppState>,
}
```

Same for

```rust
struct Foo {
    #[from_request(via(State))]
    state: AppState,
}
```

And

```rust
struct AppState {}
```

I think I've covered all the edge cases but there are (unsurprisingly) a
few.

* make sure things can be combined with other extractors

* main functions in ui tests don't need to be async

* Add test for multiple identicaly state types

* Add failing test for multiple states
2022-09-23 23:50:50 +02:00

36 lines
721 B
Rust

use std::convert::Infallible;
use axum::{
extract::State,
response::{IntoResponse, Response},
routing::get,
Router,
};
use axum_macros::FromRequest;
fn main() {
let _: Router<AppState> =
Router::with_state(AppState::default()).route("/a", get(|_: Extractor| async {}));
}
#[derive(Clone, Default, FromRequest)]
#[from_request(rejection(MyRejection))]
struct Extractor {
state: State<AppState>,
}
#[derive(Clone, Default)]
struct AppState {}
struct MyRejection {}
impl From<Infallible> for MyRejection {
fn from(err: Infallible) -> Self {
match err {}
}
}
impl IntoResponse for MyRejection {
fn into_response(self) -> Response {
().into_response()
}
}