fix: logic for printing warning (#10976)

1 files changed, 5 insertions, 3 deletions

diff --git a/packages/astro/src/core/middleware/callMiddleware.ts b/packages/astro/src/core/middleware/callMiddleware.ts
index b92e0f3cb..d52ba0126 100644
--- a/packages/astro/src/core/middleware/callMiddleware.ts
+++ b/packages/astro/src/core/middleware/callMiddleware.ts
@@ -56,13 +56,15 @@ export async function callMiddleware(
 	let responseFunctionPromise: Promise<Response> | Response | undefined = undefined;
 	const next: MiddlewareNext = async (payload) => {
 		nextCalled = true;
-		if (enableRerouting) {
-			responseFunctionPromise = responseFunction(apiContext, payload);
-		} else {
+		if (!enableRerouting && payload) {
 			logger.warn(
 				'router',
 				'The rewrite API is experimental. To use this feature, add the `rewriting` flag to the `experimental` object in your Astro config.'
 			);
+		}
+		if (enableRerouting) {
+			responseFunctionPromise = responseFunction(apiContext, payload);
+		} else {
 			responseFunctionPromise = responseFunction(apiContext);
 		}
 		// We need to pass the APIContext pass to `callMiddleware` because it can be mutated across middleware functions