axum-extra: Make axum optional dependency (#3485)

axum-extra/src/response/attachment.rs

@@ -1,4 +1,4 @@
-use axum::response::IntoResponse;
+use axum_core::response::IntoResponse;
 use http::{header, HeaderMap, HeaderValue};
 use tracing::error;
 
@@ -79,7 +79,7 @@ impl<T> IntoResponse for Attachment<T>
 where
     T: IntoResponse,
 {
-    fn into_response(self) -> axum::response::Response {
+    fn into_response(self) -> axum_core::response::Response {
         let mut headers = HeaderMap::new();
 
         if let Some(content_type) = self.content_type {

axum-extra/src/response/erased_json.rs

@@ -1,10 +1,8 @@
 use std::sync::Arc;
 
-use axum::{
-    http::{header, HeaderValue, StatusCode},
-    response::{IntoResponse, Response},
-};
+use axum_core::response::{IntoResponse, Response};
 use bytes::{BufMut, Bytes, BytesMut};
+use http::{header, HeaderValue, StatusCode};
 use serde_core::Serialize;
 
 /// A response type that holds a JSON in serialized form.

axum-extra/src/response/file_stream.rs

@@ -1,4 +1,4 @@
-use axum::{
+use axum_core::{
     body,
     response::{IntoResponse, Response},
     BoxError,

axum-extra/src/response/mod.rs

@@ -60,11 +60,11 @@ macro_rules! mime_response {
         #[must_use]
         pub struct $ident<T>(pub T);
 
-        impl<T> axum::response::IntoResponse for $ident<T>
+        impl<T> axum_core::response::IntoResponse for $ident<T>
         where
-            T: axum::response::IntoResponse,
+            T: axum_core::response::IntoResponse,
         {
-            fn into_response(self) -> axum::response::Response {
+            fn into_response(self) -> axum_core::response::Response {
                 (
                     [(
                         http::header::CONTENT_TYPE,

axum-extra/src/response/multiple.rs

@@ -1,6 +1,6 @@
 //! Generate forms to use in responses.
 
-use axum::response::{IntoResponse, Response};
+use axum_core::response::{IntoResponse, Response};
 use fastrand;
 use http::{header, HeaderMap, StatusCode};
 use mime::Mime;