got undefined error on pusher:subscription_error event.

Do you want to request a feature or report a bug?

bug

What is the current behavior?

got undefined error on pusher:subscription_error event.

pusher:subscription_error { type: 'AuthError', error: undefined } undefined

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar.

const pusher = new Pusher(env.PUSHER_APP_KEY, {
  cluster: env.PUSHER_APP_CLUSTER,
  authEndpoint: 'https://my-server/channels/auth',
  auth: {
    headers: {
      'Authorization': 'Bearer token',
    },
  },
});

  const channelName = 'presence-agents';
  const channel = await pusher.subscribe(channelName);
  console.log('subscribed channel', channelName);

  channel.bind('pusher:subscription_error', (error, data) => {
    console.error('pusher:subscription_error', error, data);
  });

What is the expected behavior?

the error param should not be undefined.

Which versions of Pusher, and which browsers / OS are affected by this issue? Did this work in previous versions of Pusher? If so, which?

pusher-js: 7.0.0 node: v12.16.0

[chenghung]

@leesio thanks for reply,

I’m using pusher-js package in a node environment so there is no browser network data to show.

you can reproduce this issue by calling channel auth API that response unexpected data with http 200 status code.

for example:

POST /api/channels/auth   <- the endpoint of channel auth API.

{ }    <- response body

then pusher-js will emit a “pusher:subscription_error” event with undefined error.

this issue is not a critical bug but may cause debugging more difficult.

[Nickbahson]

I guess the other option is to handle active (persistent) sessions from within your application, to compliment the pusher api for this issue https://github.com/pusher/pusher-js/issues/485