Websocket subprotocol results in Error: The script will never generate a response.

Websockets - sending subprotocols (auth token smuggling) results in Error: The script will never generate a response.

Client:

const ws = new WebSocket(wsUrl, "potato");

const ws = new WebSocket(wsUrl, "potato");

Using hono for the worker:

app.get(
  "/ws",
  upgradeWebSocket((c) => {
    const rawProtocols = c.req.header("sec-websocket-protocol");
    console.log(rawProtocols);

    return {
      onMessage: (event) => {
        console.log(event.data);
      },
    };
  })
);

app.get(
  "/ws",
  upgradeWebSocket((c) => {
    const rawProtocols = c.req.header("sec-websocket-protocol");
    console.log(rawProtocols);

    return {
      onMessage: (event) => {
        console.log(event.data);
      },
    };
  })
);

Fails right away at the upgrade with Error: The script will never generate a response. on the server.
This only happens if I send a subprotocol such as "potato" which automatically gets converted to the sec-websocket-protocol header as it should. Curiously I can see the header in the console log.
Also tried with hc, same issue.

Cloudflare Developers•13mo ago

playsonmac

Websocket subprotocol results in Error: The script will never generate a response.

Websockets - sending subprotocols (auth token smuggling) results in Error: The script will never generate a response.

Client:

const ws = new WebSocket(wsUrl, "potato");

const ws = new WebSocket(wsUrl, "potato");

Using hono for the worker:

app.get(
  "/ws",
  upgradeWebSocket((c) => {
    const rawProtocols = c.req.header("sec-websocket-protocol");
    console.log(rawProtocols);

    return {
      onMessage: (event) => {
        console.log(event.data);
      },
    };
  })
);

app.get(
  "/ws",
  upgradeWebSocket((c) => {
    const rawProtocols = c.req.header("sec-websocket-protocol");
    console.log(rawProtocols);

    return {
      onMessage: (event) => {
        console.log(event.data);
      },
    };
  })
);

Websocket subprotocol results in Error: The script will never generate a response.

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