cWS instead of uWS

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info

Does engine.io should support cWS instead of uWS websocket module?

uWS is dead and cWS is the most mature successor and uses uWebsocket under the hood too.

I've tried to implement it by myself in server.js of engine.io adding simply new case in switch statement:

switch (this.wsEngine) {
    case 'ws': wsModule = require('ws'); break;
    case 'uws': wsModule = require('uws'); break;
    case 'cws':
      wsModule = require('@clusterws/cws');
      wsModule.Server = wsModule.WebSocketServer;
    break;
    default: throw new Error('unknown wsEngine');
  }

It seems to not working at all, but it states compatibility with ws module.

cWS github project: https://github.com/ClusterWS/cWS

[darrachequesne]

Hi! I haven't had the time to check the cws module yet, but that looks promising. Are you able to connect with the client?

Unfortunatelly not, I've discovered that there are some incompatibilites with original ws module, like handleUpgrade has different arguments, 2 instead of 4, the main important one was callback param, I've done some changes to this method and it works but then another problem occured so I gave up for a while.

Wonder if it's even possible to support it in engine.io without big changes

@darrachequesne

So far so good, I've upgraded "handleUpgrade" method to be compatible with ws module and also changed default EventEmitter like here: https://github.com/ClusterWS/cWS#replace-eventemitter
to classic one from 'events' module and it works! Gonna test it more

[yambakshi]

Whats the recommended uws workaround? Will it be removed from the wsEngine switch in server.js? (line 107)
It still throws an exception
Module not found: Error: Can't resolve 'uws'

@yambakshi, it is because you need to install uws first from npm (watch out for versions, read about uws author and why he had deleted it from npm)

[klimashkin]

read about uws author and why he had deleted it from npm

@Kamil93 What do you mean? Could you elaborate more on where to read?

[mmdevries]

@klimashkin, I'm not sure if this solves your issue but we have created a new package based on the original uws merged with some fixes from cws. The new package should be compatible with node 10 and 12.
https://github.com/mmdevries/uws

[darrachequesne]

Please take a look at eiows, by @mmdevries.

Instructions here: https://socket.io/docs/server-installation/#Other-WebSocket-server-implementations