add cache-status and cdn-cache-control header names

actix-http/CHANGES.md

@@ -7,7 +7,9 @@
 - Implement `MessageBody` for `Pin<B>` where `B::Target: MessageBody`. [#2868]
 - Automatic h2c detection via new service finalizer `HttpService::tcp_auto_h2c()`. [#2957]
 - `HeaderMap::retain()` [#2955].
-- Header name constants in `header` module. [#2956]
+- Header name constants in `header` module. [#2956] [#????]
+  - `CACHE_STATUS`
+  - `CDN_CACHE_CONTROL`
   - `CROSS_ORIGIN_EMBEDDER_POLICY`
   - `CROSS_ORIGIN_OPENER_POLICY`
   - `PERMISSIONS_POLICY`
@@ -24,6 +26,7 @@
 [#2957]: https://github.com/actix/actix-web/pull/2957
 [#2955]: https://github.com/actix/actix-web/pull/2955
 [#2956]: https://github.com/actix/actix-web/pull/2956
+[#????]: https://github.com/actix/actix-web/pull/????
 
 
 ## 3.2.2 - 2022-09-11

actix-http/src/header/common.rs

@@ -4,6 +4,14 @@
 
 use http::header::HeaderName;
 
+/// Response header field that indicates how caches have handled that response and its corresponding
+/// request.
+pub const CACHE_STATUS: HeaderName = HeaderName::from_static("cache-status");
+
+/// Response header field that allows origin servers to control the behavior of CDN caches
+/// interposed between them and clients separately from other caches that might handle the response.
+pub const CDN_CACHE_CONTROL: HeaderName = HeaderName::from_static("cdn-cache-control");
+
 /// Response header that prevents a document from loading any cross-origin resources that don't
 /// explicitly grant the document permission (using [CORP] or [CORS]).
 ///