Implement Clone and Service for Next (#1712)

axum/CHANGELOG.md

@@ -9,9 +9,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **added:** Implement `IntoResponse` for `&'static [u8; N]` and `[u8; N]` ([#1690])
 - **fixed:** Make `Path` support types uses `serde::Deserializer::deserialize_any` ([#1693])
+- **added:** Implement `Clone` and `Service` for `axum::middleware::Next` ([#1712])
 
 [#1690]: https://github.com/tokio-rs/axum/pull/1690
 [#1693]: https://github.com/tokio-rs/axum/pull/1693
+[#1712]: https://github.com/tokio-rs/axum/pull/1712
 
 # 0.6.2 (9. January, 2023)
 

axum/src/middleware/from_fn.rs

@@ -346,6 +346,28 @@ impl<B> fmt::Debug for Next<B> {
     }
 }
 
+impl<B> Clone for Next<B> {
+    fn clone(&self) -> Self {
+        Self {
+            inner: self.inner.clone(),
+        }
+    }
+}
+
+impl<B> Service<Request<B>> for Next<B> {
+    type Response = Response;
+    type Error = Infallible;
+    type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
+
+    fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
+        self.inner.poll_ready(cx)
+    }
+
+    fn call(&mut self, req: Request<B>) -> Self::Future {
+        self.inner.call(req)
+    }
+}
+
 /// Response future for [`FromFn`].
 pub struct ResponseFuture {
     inner: BoxFuture<'static, Response>,