React App using socket.io client tries to make a connection to http://127.0.0.1:50005/socket.io/?EIO=3&transport=polling&t=MLY0Fkf, but I am using a remote socket server + enforcing websocket transport

[acoutts]

You want to:

• report a bug
• request a feature

Current behaviour

Users are seeing this error in their browser, as well as myself on my local environment:

Steps to reproduce (if the current behaviour is a bug)

const io = require('socket.io-client')
var socket_url = `http://[REMOTE_WEBSOCKET_HOST]`; //~ TODO: move this somewhere else

var socket = io(socket_url, {transports: ['websocket']});

Note that the socket server is remote but socket.io is still trying to open a localhost connection on every end user browser.

Expected behaviour

It should not attempt to connect to this localhost socket.
Note: socket.io is working as expected otherwise, this is just an error that users are reporting they are seeing.

Setup

• OS: macOS High Sierra 10.13.6
• browser: Google Chrome Version 68.0.3440.106 (Official Build) (64-bit)
• socket.io version: socket.io-client 2.1.1

Other information (e.g. stacktraces, related issues, suggestions how to fix)

polling-xhr.js:263 GET http://127.0.0.1:50005/socket.io/?EIO=3&transport=polling&t=MLY0Fkf 0 ()
./node_modules/engine.io-client/lib/transports/polling-xhr.js.Request.create @ polling-xhr.js:263
Request @ polling-xhr.js:165
./node_modules/engine.io-client/lib/transports/polling-xhr.js.XHR.request @ polling-xhr.js:92
./node_modules/engine.io-client/lib/transports/polling-xhr.js.XHR.doPoll @ polling-xhr.js:122
./node_modules/engine.io-client/lib/transports/polling.js.Polling.poll @ polling.js:118
./node_modules/engine.io-client/lib/transports/polling.js.Polling.doOpen @ polling.js:63
./node_modules/engine.io-client/lib/transport.js.Transport.open @ transport.js:80
./node_modules/engine.io-client/lib/socket.js.Socket.open @ socket.js:245
Socket @ socket.js:119
Socket @ socket.js:28
./node_modules/socket.io-client/lib/manager.js.Manager.open.Manager.connect @ manager.js:226
Manager @ manager.js:69
Manager @ manager.js:37
lookup @ index.js:60
Promise.race.Promise @ scatter.esm.js:128
link @ scatter.esm.js:127
resolve @ scatter.esm.js:569
connect @ scatter.esm.js:553
_callee5$ @ ScatterStore.js:379
tryCatch @ runtime.js:62
invoke @ runtime.js:296
prototype.(anonymous function) @ runtime.js:114
step @ OrderEntryStore.js:106
(anonymous) @ OrderEntryStore.js:106
(anonymous) @ OrderEntryStore.js:106
ScatterStore @ ScatterStore.js:432
./src/stores/index.js @ index.js:23
__webpack_require__ @ bootstrap d1fd0316e478a1070bc5:678
fn @ bootstrap d1fd0316e478a1070bc5:88
./src/index.js @ index.css?f255:26
__webpack_require__ @ bootstrap d1fd0316e478a1070bc5:678
fn @ bootstrap d1fd0316e478a1070bc5:88
0 @ index.js:27
__webpack_require__ @ bootstrap d1fd0316e478a1070bc5:678
(anonymous) @ bootstrap d1fd0316e478a1070bc5:724
(anonymous) @ bootstrap d1fd0316e478a1070bc5:724
10:19:17.353 

[darrachequesne]

What is the value of socket_url̀? Could it be undefined or something like that?

[acoutts]

Thanks @darrachequesne - it is indeed defined there, I just removed it for a placeholder before posting this.

[acoutts]

Closing as this appears to be an issue in the scatter-js package.

[yogeshR5]

@acoutts
Same error while running on a socket

The Error 👍
POST http://localhost:3000/socket.io/?EIO=3&transport=polling&t=MSwHsDu 404 (Not Found)

[anshulshacks]

Was anyone able to figure out what fixed their error. I have the same error:

[darrachequesne]

@anshulshacks could you please provide a way to reproduce, and create a new issue with all necessary details? Thanks!

[Flaminiat]

any news on the fix for this issue?