1 files changed, 8 insertions, 0 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/sw.js b/packages/meshbay-hub/src/meshbay_hub/static/sw.js
index d0a8805..119687d 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/sw.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/sw.js
@@ -29,6 +29,11 @@ self.addEventListener('message', (event) => {
     readable: data.readable,
     filename: data.filename || 'download',
     size: Number(data.size) || 0,
+    // Answered when the navigation actually reaches us. The page waits for it:
+    // if this worker is never asked for the URL — an uncontrolled page, or a
+    // browser that blocks a download from a hidden iframe — nothing drains the
+    // stream and the page's first write blocks for good.
+    port: data.port || null,
   });
   // A tab that is closed before it navigates would leave a stream here for the
   // life of the worker.
@@ -44,6 +49,9 @@ self.addEventListener('fetch', (event) => {
   const entry = pending.get(url.pathname.slice(PREFIX.length));
   if (!entry) return;
   pending.delete(url.pathname.slice(PREFIX.length));
+  if (entry.port) {
+    try { entry.port.postMessage({ type: 'mbdl-serving', id: url.pathname }); } catch { /* gone */ }
+  }
 
   const headers = {
     'Content-Type': 'application/octet-stream',