ios 15.1.1 safari Unable to link

[sandywk]

Error {type: "TransportError", description...
description: Event {isTrusted: true}
isTrusted: true
proto: Event {type: (...), target: (...), current...
type: "TransportError"
column: 22
line: 64
message: "websocket error"
stack: "@\n@\nclose@[native code]\n@\n@\n@\nclose@\n@\n@"
proto: Error {}

WebSocket connection to 'wss://..../socket.io/?type=a&hash=b&EIO=3&transport=websocket' failed: WebSocket is closed before the connection is established.

"socket.io-client": "^2.3.0",

Ios14 can link normally
Android is also all normal
Please tell me what to do

[wejew]

I'm having the same issue. Looks to be something to do with TLS but have not found a solution.

[darrachequesne]

@sandywk which version of the server are you using? Please see the compatibility table here: https://github.com/socketio/socket.io-client-swift/blob/master/Usage%20Docs/Compatibility.md

[sandywk]

The server version is the same as the client version @darrachequesne

node v10.19.0
"socket.io": "^2.3.0",

[sandywk]

@wejew I once thought it was a TLS problem, but after I tried many TLS solutions, I still couldn't solve this problem.

[sandywk]

@darrachequesne I link through the web

import io from 'socket.io-client';
io('wss://..../socket.io/?type=a&hash=b', { transports: ['websocket'] });

Several IOS 15 mobile phones have been tested, and safari has this problem

[wejew]

@sandywk that's discouraging. I was thinking it was TLS because if you look at the headers on safari it doesn't have the host header. And I think AWS uses the host header in the TLS negotiation. I sure hope that someone has a solution for this soon. Like you, I have gone down many rabbit holes and wasted weeks of time trying to fix this in our apps.

[darrachequesne]

OK, so it seems to be a known bug with iOS 15 and WebSockets: https://developer.apple.com/forums/thread/685403

Related: react-native-webview/react-native-webview#2281

[sandywk]

@darrachequesne @wejew @darrachequesne Upgrading to 15.4 has solved this problem

[sandywk]

IOS 15.4 Fixed this problem

[spencercap]

i have not experienced your luck with iOS 15.4 @sandywk

[AlvinStefanus]

IOS 15.5 has this problem

[darrachequesne]

I'm going to close this, as I don't think there is much we can do on our side.

Please reopen if needed.