I need help with the switching protocol issue. I’ve checked, and the problem also occurs in Firefox. Maybe someone can assist?

[utopiaeh]

I am a web developer, and when working in dev mode using Vite, I sometimes encounter a ‘101 Switching Protocols’ status, causing the site to go down. After clearing storage, cache, and restarting, it starts working again, but the problem reappears after a while. Additionally, enabling HTTPS-Only Mode the problem persists permanently. Has anyone else experienced this issue? If so, how did you fix it? Thanks!”

[dosubot[bot]]

The issue you're experiencing with the '101 Switching Protocols' status and its persistence in Firefox, especially when using Vite in development mode, might be related to the security settings and how WebSocket connections are handled.

1. HTTPS-Only Mode: This mode enforces all connections to be made over HTTPS, which can interfere with WebSocket connections if they are not properly configured to use wss:// (WebSocket Secure). Ensure that your WebSocket connections are using wss:// when HTTPS-Only Mode is enabled.

2. Security Settings: The project has specific security settings that might affect WebSocket connections:

   • pref('dom.security.https_only_mode', true); enforces HTTPS connections.
   • pref("network.websocket.max-connections", 400); increases the maximum number of WebSocket connections, which should help with connection limits ^[1].

3. Vite Configuration: Check your Vite configuration to ensure that it supports WebSocket connections over HTTPS. You might need to adjust the server settings in your vite.config.js to handle secure WebSocket connections.

4. Browser Cache and Storage: Since clearing storage and cache temporarily resolves the issue, consider implementing a more permanent solution by reviewing how your application handles session data and WebSocket connections.

If these steps don't resolve the issue, you might want to investigate further into any custom middleware or server configurations that could be interfering with protocol switching or WebSocket connections.

To continue talking to Dosu, mention @dosu.

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