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use std::future::Future;
use std::task::{Context, Poll};
use tower_service::Service;
pub fn service_fn<T>(f: T) -> ServiceFn<T> {
ServiceFn { f }
}
#[derive(Copy, Clone, Debug)]
pub struct ServiceFn<T> {
f: T,
}
impl<T, F, Request, R, E> Service<Request> for ServiceFn<T>
where
T: FnMut(Request) -> F,
F: Future<Output = Result<R, E>>,
{
type Response = R;
type Error = E;
type Future = F;
fn poll_ready(&mut self, _: &mut Context<'_>) -> Poll<Result<(), E>> {
Ok(()).into()
}
fn call(&mut self, req: Request) -> Self::Future {
(self.f)(req)
}
}