0.29.7

src/runtime/tests.rs

@@ -60,6 +60,7 @@ mod cache_revision_tests {
         wire_only.cache.expose_hits = !wire_only.cache.expose_hits;
         wire_only.cache.expose_cache_status = !wire_only.cache.expose_cache_status;
         wire_only.cache.expose_resident_age = !wire_only.cache.expose_resident_age;
+        wire_only.cache.expose_only_hits = !wire_only.cache.expose_only_hits;
         wire_only.cache.via_header = Some("RustProxy edge".into());
         assert_eq!(cache_revision(&wire_only), identity);
         assert!(matches!(
@@ -67,6 +68,11 @@ mod cache_revision_tests {
             CacheInvalidation::None
         ));
 
+        let mut vhost_diagnostics = base.clone();
+        vhost_diagnostics.vhosts[0].cache.expose_only_hits = Some(true);
+        assert_eq!(cache_revision(&vhost_diagnostics), identity);
+        assert!(matches!(cache_invalidation(&base, &vhost_diagnostics), CacheInvalidation::None));
+
         let mut cache = base.clone();
         cache.cache.max_entries += 1;
         let cache_identity = cache_revision(&cache);

src/runtime/types.rs

@@ -99,6 +99,7 @@ fn cache_revision(config: &config::Config) -> u64 {
     cache.expose_hits = false;
     cache.expose_cache_status = false;
     cache.expose_resident_age = false;
+    cache.expose_only_hits = false;
     cache.via_header = None;
     // Resource-only transform controls decide how much optimization work may
     // happen concurrently, but do not change the transformed representation.
@@ -108,12 +109,18 @@ fn cache_revision(config: &config::Config) -> u64 {
     transform.preset = None;
     transform.memory_budget_bytes = 0;
     transform.max_inflight = 0;
+    // A per-vhost diagnostics override is also presentation-only and must not
+    // invalidate cached objects when switched from inherited to HIT-only.
+    let mut vhosts = config.vhosts.clone();
+    for vhost in &mut vhosts {
+        vhost.cache.expose_only_hits = None;
+    }
     let encoded = serde_json::to_vec(&(
         &cache,
         &transform,
         &config.headers,
         &config.forwarding,
-        &config.vhosts,
+        &vhosts,
     ))
     .expect("serializable cache compatibility view");
     let digest = Sha256::digest(encoded);