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Server-sent events (SSE): real-time file updates

Updated 4 May 2026 Search & Document Tools

Server-sent events (SSE): real-time file updates

Foldr supports server-sent events (SSE): a one-way HTTP-streaming connection from the server to the client that pushes notifications of changes the moment they happen.

For users, the visible effect is that file lists update in real time. When a colleague creates, deletes, or modifies a file in a share you’re currently looking at, your browser shows the change immediately, with no need to refresh. The same applies inside the macOS app.

Client support

  • Web app: supported.
  • macOS app: supported.
  • Windows app and mobile apps: SSE support is planned for future releases.

SSE is enabled per-app, so you can turn it on for the web app today even if your macOS or other clients aren’t using it yet.

Enabling SSE for the web app

  1. Sign into Foldr Settings as fadmin (or as a delegated admin with Devices & Clients access) at https://<your-foldr>/settings (v10 and later) or https://<your-foldr>:30537/settings (v9 and earlier).

  2. Open Devices & Clients → Web & Other.

  3. Toggle Server Sent Events on.

  4. Click Save Changes.

To enable SSE for the macOS app, repeat on the macOS tab. Other client tabs (Windows, mobile) will gain the toggle as those clients add SSE support.

Verifying SSE is working

Once enabled, signed-in users see a connection indicator in the client:

  • Web app: an SSE-status icon appears in the top-right of the page once the SSE connection is established.

  • macOS app: the menu bar Foldr icon turns green when SSE is connected.

If the indicator never appears, see the limitations below.

Limitations

SSE depends on a long-lived HTTP streaming connection from the client to the Foldr server. Reverse proxy services that buffer responses or terminate idle connections will break SSE. This includes some default configurations of nginx, IIS ARR, and most CDN-front-end products.

If you’re fronting Foldr with a reverse proxy, either:

  • Configure the proxy to disable response buffering and extend the idle timeout to several minutes for the SSE endpoints, or
  • Disable SSE in Foldr Settings and rely on the regular polling refresh.

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