0.29.7

src/proxy/error_fallback.rs

@@ -181,3 +181,29 @@ async fn execute_error_fallback(
     }
     Some(response)
 }
+
+/// Called only for a response supplied by the Web Server or an HTTP origin.
+/// Routing/security failures and internal fallback responses are excluded.
+fn intercept_route_origin_error(
+    response: Response,
+    route: &crate::config::CompiledRoute,
+    snapshot: &crate::config::Snapshot,
+) -> Response {
+    // An internal named location is the final, administrator-selected fallback
+    // representation. Interception inside its nested forward_request would
+    // otherwise erase its 404 HTML before ErrorFallbackResponse is attached.
+    if route.internal {
+        return response;
+    }
+    let mut response = if let Some(frontend) = route.frontend.as_ref() {
+        crate::pages::intercept_application_error(
+            response,
+            &frontend.pages,
+            &snapshot.envelope.config.pages,
+        )
+    } else {
+        response
+    };
+    response.extensions_mut().insert(crate::pages::OriginProvidedResponse);
+    response
+}