Add ability to update URL during reconnect

[Edvinas01]

Context Before creating stomp client, my users fetch jwt from the back-end. Then using that jwt a url is formed which is later used in stomp client:

const stomp = require('...');

const jwt = 'some token from back-end';
const client = stomp.client(`${url}/stomp?token=${jwt}`);

client.reconnect_delay = 1000;

Issue If client loses connection to the back-end, it tries to reconnect. However the jwt which was used to initialize it can be expired. Which means the client will not be able to reconnect and will start looping in such case.

Proposed solution Add a reconnect hook which would allow to alter url before reconnecting.

[kum-deepak]

I do understand the issue. However the way current code is structured the solution is not going to be straightforward.

Currently I am working at rewriting this library - see: https://github.com/stomp-js/stompjs/issues/1. This will be taken as a feature request there. I will not be able to work on this as of now.

If you need a solution now, I suggest one of the following:

• Set client.reconnect_delay to 0 to switch off auto reconnect. Handle reconnect outside by watching errorCallback.
• Extend the library for the hook. See: https://stomp-js.github.io/stomp-websocket/codo/#https://stomp-js.github.io/stomp-websocket/codo/extra/docs-src/Contribute.md.html It has general details about the code. If you decide to go this route please let me know.

[kum-deepak]

Fixed in v5.0.0. Please upgrade https://stomp-js.github.io/stompjs/additional-documentation/upgrading.html