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Pending hyperium/tonic#1740. DNM until its released. This lets us drop a few shims
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Original file line number | Diff line number | Diff line change |
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use pin_project_lite::pin_project; | ||
use tonic::body::BoxBody; | ||
use tonic::Status; | ||
use tower::{BoxError, ServiceExt}; | ||
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// Copied from https://github.com/hyperium/tonic/blob/34b863b1d2a204ef3dd871ec86860fc92aafb451/examples/src/tls_rustls/server.rs | ||
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/// An adaptor which converts a [`tower::Service`] to a [`hyper::service::Service`]. | ||
/// | ||
/// The [`hyper::service::Service`] trait is used by hyper to handle incoming requests, | ||
/// and does not support the `poll_ready` method that is used by tower services. | ||
/// | ||
/// This is provided here because the equivalent adaptor in hyper-util does not support | ||
/// tonic::body::BoxBody bodies. | ||
#[derive(Debug, Clone)] | ||
pub struct TowerToHyperService<S> { | ||
service: S, | ||
} | ||
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impl<S> TowerToHyperService<S> { | ||
/// Create a new `TowerToHyperService` from a tower service. | ||
pub fn new(service: S) -> Self { | ||
Self { service } | ||
} | ||
} | ||
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impl<S> hyper::service::Service<hyper::Request<hyper::body::Incoming>> for TowerToHyperService<S> | ||
where | ||
S: tower::Service<hyper::Request<BoxBody>> + Clone, | ||
S::Error: Into<BoxError> + 'static, | ||
{ | ||
type Response = S::Response; | ||
type Error = BoxError; | ||
type Future = TowerToHyperServiceFuture<S, hyper::Request<BoxBody>>; | ||
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fn call(&self, req: hyper::Request<hyper::body::Incoming>) -> Self::Future { | ||
use http_body_util::BodyExt; | ||
let req = req.map(|incoming| { | ||
incoming | ||
.map_err(|err| Status::from_error(err.into())) | ||
.boxed_unsync() | ||
}); | ||
TowerToHyperServiceFuture { | ||
future: self.service.clone().oneshot(req), | ||
} | ||
} | ||
} | ||
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pin_project! { | ||
/// Future returned by [`TowerToHyperService`]. | ||
#[derive(Debug)] | ||
pub struct TowerToHyperServiceFuture<S, R> | ||
where | ||
S: tower::Service<R>, | ||
{ | ||
#[pin] | ||
future: tower::util::Oneshot<S, R>, | ||
} | ||
} | ||
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impl<S, R> std::future::Future for TowerToHyperServiceFuture<S, R> | ||
where | ||
S: tower::Service<R>, | ||
S::Error: Into<BoxError> + 'static, | ||
{ | ||
type Output = Result<S::Response, BoxError>; | ||
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#[inline] | ||
fn poll( | ||
self: std::pin::Pin<&mut Self>, | ||
cx: &mut std::task::Context<'_>, | ||
) -> std::task::Poll<Self::Output> { | ||
self.project().future.poll(cx).map_err(Into::into) | ||
} | ||
} |
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