actix-state-guards

This crate provides a more flexible guard function for the [actix-web] framework.

The [Guard] acts as a gatekeeper for a specific scope and governs over which request is allowed to pass.

Guards can accept application state as well as types that implement the [FromReqeust] trait as parameters. They can also execute asynchrones code inside them.

Example

```rust

[derive(Debug)]

pub struct CounterError();

impl Display for CounterError { fn fmt(&self, f: &mut std::fmt::Formatter<'>) -> std::fmt::Result { f.writestr("Error: Counter is over 100") } }

impl ResponseError for CounterError {}

[get("/count")]

async fn count(counter: web::Data>) -> impl Responder { let mut counter = counter.lock().unwrap(); *counter += 1; counter.to_string() }

[actix_web::main]

async fn main() -> Result<(), Box> { Ok(HttpServer::new(move || { App::new() .appdata(web::Data::new(Mutex::new(0u32))) .usestate_guard( |counter: web::Data>| async move { if *counter.lock().unwrap() < 100 { Ok(()) } else { // by returning the error case of the result enum we signal that this // request shall not be allowed to pass on to the scope wrapped Err(CounterError()) } }, web::scope("").service(count), ) }) .bind(("127.0.0.1", 8080))? .run() .await?) } ```

License: MIT