Trait Checkpoint 

pub trait Checkpoint:
    Send
    + Sync
    + 'static {
    // Required method
    fn check(&self, env: &Envelope, at: Stage) -> Verdict;
}

Revocation in flight: a ban, a revoked session, or a lockdown that arrives while a request is being handled. serve-net’s own checkpoint covers admission and the moment before the reply leaves; this one covers the points in between that only web-net knows.

A checkpoint backed by remote state fails closed (denies) when the remote cannot be reached.

Required Methods

fn check(&self, env: &Envelope, at: Stage) -> Verdict

Decides at one stage.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors