fix: avoid cloning ApiDoc on every request for axum (#1393)

---------

Co-authored-by: Juha Kukkonen <juha7kukkonen@gmail.com>

Author: twuebi

utoipa-swagger-ui/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Fixed
+
+* Avoid cloning ApiDoc on every request for axum (https://github.com/juhaku/utoipa/pull/1393)
+
 ### Changed
 
 * Update build dependency `zip` to v3.0 (https://github.com/juhaku/utoipa/pull/1391)

utoipa-swagger-ui/Cargo.toml

@@ -32,7 +32,7 @@ axum = { version = "0.8.0", default-features = false, features = [
 utoipa = { version = "5.0.0", path = "../utoipa", default-features = false, features = [
     "macros",
 ] }
-serde = { version = "1.0", features = ["derive"] }
+serde = { version = "1.0", features = ["derive", "rc"] }
 serde_json = { version = "1.0" }
 base64 = { version = "0.22.1" }
 

utoipa-swagger-ui/src/axum.rs

@@ -28,13 +28,13 @@ where
                 Vec::<Url>::with_capacity(urls_capacity + external_urls_capacity),
             ),
             |router_and_urls, (url, openapi)| {
-                add_api_doc_to_urls(router_and_urls, (url, ApiDoc::Utoipa(openapi)))
+                add_api_doc_to_urls(router_and_urls, (url, Arc::new(ApiDoc::Utoipa(openapi))))
             },
         );
         let (router, urls) = swagger_ui.external_urls.into_iter().fold(
             (router, urls),
             |router_and_urls, (url, openapi)| {
-                add_api_doc_to_urls(router_and_urls, (url, ApiDoc::Value(openapi)))
+                add_api_doc_to_urls(router_and_urls, (url, Arc::new(ApiDoc::Value(openapi))))
             },
         );
 
@@ -108,7 +108,7 @@ where
 
 fn add_api_doc_to_urls<S>(
     router_and_urls: (Router<S>, Vec<Url<'static>>),
-    url: (Url<'static>, ApiDoc),
+    url: (Url<'static>, Arc<ApiDoc>),
 ) -> (Router<S>, Vec<Url<'static>>)
 where
     S: Clone + Send + Sync + 'static,