Add request cookie to HMR reload pipeline

dist/functions/server/handle-hmr.js

@@ -6,6 +6,7 @@ function removeController(controller) {
 }
 export default async function ({ req }) {
     const referer = req.headers.get("referer");
+    const page_cookie = req.headers.get("cookie");
     if (!referer) {
         return new Response("Missing Referer Header", { status: 400 });
     }
@@ -29,6 +30,7 @@ export default async function ({ req }) {
                 controller: c,
                 page_url: referer_url.href,
                 target_map,
+                page_cookie,
             });
             heartbeat = setInterval(() => {
                 try {

dist/functions/server/server-post-build-fn.js

@@ -34,9 +34,11 @@ export default async function serverPostBuildFn(params) {
             continue;
         }
         const mock_req = target_artifact.req_url
-            ? new Request(target_artifact.req_url)
+            ? new Request(target_artifact.req_url, {})
             : new Request(controller.page_url);
-        // Always re-run server fns so fixed errors clear on the first HMR
+        if (controller.page_cookie) {
+            mock_req.headers.set("cookie", controller.page_cookie);
+        }
         const page_component = await grabPageComponent({
             req: mock_req,
             return_server_res_only: true,