Implement FromRequestParts for Parts and Extensions (#2328)

axum-core/src/extract/request_parts.rs

@@ -2,7 +2,7 @@ use super::{rejection::*, FromRequest, FromRequestParts, Request};
 use crate::{body::Body, RequestExt};
 use async_trait::async_trait;
 use bytes::Bytes;
-use http::{request::Parts, HeaderMap, Method, Uri, Version};
+use http::{request::Parts, Extensions, HeaderMap, Method, Uri, Version};
 use http_body_util::BodyExt;
 use std::convert::Infallible;
 
@@ -115,14 +115,26 @@ where
 }
 
 #[async_trait]
-impl<S> FromRequest<S> for Parts
+impl<S> FromRequestParts<S> for Parts
 where
     S: Send + Sync,
 {
     type Rejection = Infallible;
 
-    async fn from_request(req: Request, _: &S) -> Result<Self, Self::Rejection> {
-        Ok(req.into_parts().0)
+    async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
+        Ok(parts.clone())
+    }
+}
+
+#[async_trait]
+impl<S> FromRequestParts<S> for Extensions
+where
+    S: Send + Sync,
+{
+    type Rejection = Infallible;
+
+    async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
+        Ok(parts.extensions.clone())
     }
 }