Introduce Response type alias as a shorthand for Response<BoxBody> (#590)

* Introduce `Response` type alias as a shorthand

* Don't re-export `Response` at the crate root

axum-extra/src/extract/cached.rs

@@ -1,12 +1,10 @@
 use axum::{
     async_trait,
-    body::BoxBody,
     extract::{
         rejection::{ExtensionRejection, ExtensionsAlreadyExtracted},
         Extension, FromRequest, RequestParts,
     },
-    http::Response,
-    response::IntoResponse,
+    response::{IntoResponse, Response},
 };
 use std::{
     fmt,
@@ -31,8 +29,8 @@ use std::{
 ///     async_trait,
 ///     extract::{FromRequest, RequestParts},
 ///     body::BoxBody,
-///     response::IntoResponse,
-///     http::{StatusCode, Response},
+///     response::{IntoResponse, Response},
+///     http::StatusCode,
 /// };
 ///
 /// #[derive(Clone)]
@@ -58,7 +56,7 @@ use std::{
 /// where
 ///     B: Send,
 /// {
-///     type Rejection = Response<BoxBody>;
+///     type Rejection = Response;
 ///
 ///     async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
 ///         // loading a `CurrentUser` requires first loading the `Session`
@@ -157,7 +155,7 @@ impl<R> IntoResponse for CachedRejection<R>
 where
     R: IntoResponse,
 {
-    fn into_response(self) -> Response<BoxBody> {
+    fn into_response(self) -> Response {
         match self {
             Self::ExtensionsAlreadyExtracted(inner) => inner.into_response(),
             Self::Inner(inner) => inner.into_response(),

axum-extra/src/response/erased_json.rs

@@ -1,7 +1,7 @@
 use axum::{
-    body::{self, BoxBody, Full},
-    http::{header, HeaderValue, Response, StatusCode},
-    response::IntoResponse,
+    body::{self, Full},
+    http::{header, HeaderValue, StatusCode},
+    response::{IntoResponse, Response},
 };
 use serde::Serialize;
 
@@ -39,7 +39,7 @@ impl ErasedJson {
 }
 
 impl IntoResponse for ErasedJson {
-    fn into_response(self) -> Response<BoxBody> {
+    fn into_response(self) -> Response {
         let bytes = match self.0 {
             Ok(res) => res,
             Err(err) => {

axum-extra/src/routing/resource.rs

@@ -1,8 +1,9 @@
 use super::HasRoutes;
 use axum::{
-    body::{Body, BoxBody},
+    body::Body,
     handler::Handler,
-    http::{Request, Response},
+    http::Request,
+    response::Response,
     routing::{delete, get, on, post, MethodFilter},
     Router,
 };
@@ -139,10 +140,7 @@ impl<B: Send + 'static> Resource<B> {
     /// The routes will be nested at `/{resource_name}/:{resource_name}_id`.
     pub fn nest<T>(mut self, svc: T) -> Self
     where
-        T: Service<Request<B>, Response = Response<BoxBody>, Error = Infallible>
-            + Clone
-            + Send
-            + 'static,
+        T: Service<Request<B>, Response = Response, Error = Infallible> + Clone + Send + 'static,
         T::Future: Send + 'static,
     {
         let path = self.show_update_destroy_path();
@@ -155,10 +153,7 @@ impl<B: Send + 'static> Resource<B> {
     /// The routes will be nested at `/{resource_name}`.
     pub fn nest_collection<T>(mut self, svc: T) -> Self
     where
-        T: Service<Request<B>, Response = Response<BoxBody>, Error = Infallible>
-            + Clone
-            + Send
-            + 'static,
+        T: Service<Request<B>, Response = Response, Error = Infallible> + Clone + Send + 'static,
         T::Future: Send + 'static,
     {
         let path = self.index_create_path();
@@ -176,10 +171,7 @@ impl<B: Send + 'static> Resource<B> {
 
     fn route<T>(mut self, path: &str, svc: T) -> Self
     where
-        T: Service<Request<B>, Response = Response<BoxBody>, Error = Infallible>
-            + Clone
-            + Send
-            + 'static,
+        T: Service<Request<B>, Response = Response, Error = Infallible> + Clone + Send + 'static,
         T::Future: Send + 'static,
     {
         self.router = self.router.route(path, svc);