Socket.io and WebSocket proxy

[freez10]

Hi there!

I have WebSocket proxy configured like so

  $beforeRoutesInit() { // Doing same in $afterRoutesInit() { makes no difference
    this.app
      .use(
        '/subscriptions',
        createProxyMiddleware({
          target: 'ws://localhost:8080',
          changeOrigin: true,
          ws: true,
        }),
      );
  }

Now if I try to add any SocketIO service, proxy stops working.

Is it possible having WebSocket proxy and SocketIO services at the same time somehow?

[Romakita]

@freez10 I suggest you to create reproducible example. What is your error message? Have you an original example with express and socket io ?

Probably the proxy fail because the socket io server catch all ws connection.

[freez10]

Thanks for your reply @Romakita

It turned out one have to pass a context to the proxy middleware.
This way it works as expected.

    this.app
      .use(
        createProxyMiddleware('/subscriptions', {
          target: 'ws://localhost:8080',
          changeOrigin: true,
          ws: true,
        }),
      )