Change the websocket URL /websocket

zpatrick · June 24, 2019, 3:51pm

Hi all,

I’ve trying to find a way to change the websocket URL, like this:
From:
wss://{DOMAIN}/websocket
To:
wss://{DOMAIN}/websocket-admin

I have 2 meteor apps running on the same server & domain and would like to configure the Apache server to proxy URLs and their websockets to the appropriate app based on URL:

https://{DOMAIN}/login (app 1)
https://{DOMAIN}/admin (app 1)
wss://{DOMAIN}/websocket-admin (app 1)

https://{DOMAIN}/* (app 2)
wss://{DOMAIN}/websocket (app 2)

Any help would be appreciated.
Thanks

coagmano · June 24, 2019, 11:43pm

This might not match your overall url schema, but you can set one Meteor app to behind a path like /admin/* by setting the environment variable ROOT_URL to include /admin/.

Then Meteor sets that path as the path-prefix that’s used for the websocket url here:

github.com

meteor/meteor/blob/master/packages/ddp-server/stream_server.js#L28-L43


var pathPrefix = __meteor_runtime_config__.ROOT_URL_PATH_PREFIX ||  "";


StreamServer = function () {
  var self = this;
  self.registration_callbacks = [];
  self.open_sockets = [];


  // Because we are installing directly onto WebApp.httpServer instead of using
  // WebApp.app, we have to process the path prefix ourselves.
  self.prefix = pathPrefix + '/sockjs';
  RoutePolicy.declare(self.prefix + '/', 'network');


  // set up sockjs
  var sockjs = Npm.require('sockjs');
  var serverOptions = {
    prefix: self.prefix,

Alternatively, you can use a local fork of ddp-server with the websocket-url of your choosing. You’ll also need to tell the client where to connect to. This is probably easiest done with the DDP_DEFAULT_CONNECTION_URL environment variable, but you’ll need to experiment a bit.

You can make local forks of core packages by copying the package folder from Meteor’s github into your /packages folder. Meteor always checks the packages/ folder first when deciding which version of a package to use

zpatrick · June 27, 2019, 5:35pm

Thanks coagmano, I ended doing your first suggestion, appending /admin to the ROOT_URL. I had to mess up with the routing in the app but that seems to work fine now.

Thanks.

znewsham · June 27, 2019, 5:42pm

Really small note on this - this doesn’t play nice with cordova (if that’s on your roadmap) - it hardcodes URL_PREFIX to “/”

smacar · May 27, 2020, 10:05am

Thanks coagmano, I ended doing your first suggestion, appending /admin to the ROOT_URL. I had to mess up with the routing in the app but that seems to work fine now.

@zpatrick I know this is an old post but still. I tried appending /prefix to the ROOT_URL in env variable and in gateway I have configured the path /prefix/websocket. Yet it is failing. Am I missing something here??

zpatrick · May 27, 2020, 4:53pm

@smacar the trailing / needs to be there (I forgot it in my comment), so it should be:

“ROOT_URL”: "https://domain.com/admin/ "

this way the websocket URL becomes:

wss://domain.com/admin/sockjs/250/qqph_4wi/websocket

Don’t forget your routes must have the /admin/ as well.

smacar · May 28, 2020, 6:21am

Thanks @zpatrick!! Is it possible to have like this
“ROOT_URL”: "https://domain.com/chat/admin/ "

zpatrick · May 28, 2020, 3:41pm

I haven’t tried but I don’t see why not.

smacar · May 29, 2020, 6:12am

thanks great!! @zpatrick