Can somebody explain how a simple Warp function works?

help
1

I've been working on a new API and it has been a while. I've copied over some old code but for some reason I keep getting errors I have never seen on the old API.

.or(health_route)
    | |                     -^^ method cannot be called due to unsatisfied trait bounds
    | |_____________________|

And for example:

error[E0277]: the trait bound Box<(dyn std::error::Error + Send + Sync + 'static)>: reject::sealed::CombineRejection<Rejection> is not satisfied.

While this was working fine on my old API.

Example snippet:

let health_route = warp::path("health")
        .and(warp::get()).
        and_then(health_check);

async fn health_check() -> std::result::Result<impl warp::Reply, warp::Rejection> {
    Ok(warp::reply::json(&"Service is up and running"))
}

warp::serve(routes)
        .run(([0, 0, 0, 0], 3030))
        .await;

This very simple health check I can' even get to work due to FilterBase or Filter not being satisfied! Error:

.or(health_route)
    | |                     -^^ method cannot be called due to unsatisfied trait bounds
12  |   pub struct AndThen<T, F> {
    |   ------------------------ doesn't satisfy `_: FilterBase` or `_: Filter`

Please help me!

2

You should either read the documentation for the version you're now using or in your new project use the same version of your dependency as in your old project.

3

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