Client won't connect in React Native iOS Release Mode

[millro04]

Describe the bug I am using socket.io-client version 2.3.1 in a React Native app. The client connects just fine in debug mode. However, on a release build the client does not connect. I've seen a handful of StackOverflow posts about this but nothing conclusive as far as what to do.

How can we successfully use socket.io-client in a React Native app in release mode? Only worried about iOS at the moment.

Thank you!

Version I am using version 2.3.1

[maxHSG]

I have the same problem with react native 0.64.2 and socket.io 2.1.1

These errors are showing up in event connect_error

{"type":"TransportError","description": ["isTrusted":false, "message":"A operação não pôde se erro 2.)"}}

concluída. (KCFErrorDomainCFNetwork

[maxHSG]

I fixed this bug by updating my iphone to iOS 15.2

[darrachequesne]

That sounds weird indeed. Were you able to debug the issue?

[sajadspeed]

Same here!

[JaekwanLee]

I am experiencing the same ionic webview. Does anyone have any clue?

[hdoublin]

I coped similar things in my react-native project.

You can add this to info.plist file.

<key>NSAppTransportSecurity</key>
<dict>
 <key>NSAllowsArbitraryLoads</key>
     <true/>
</dict>

This is really similar as we android:usesCleartextTraffic="true" in AndroidManifest.xml file.

[darrachequesne]

@hdoublin if I understand correctly, in your case the problem was due to using plain HTTP, right?

@sajadspeed @JaekwanLee is that your case?

[sajadspeed]

@hdoublin if I understand correctly, in your case the problem was due to using plain HTTP, right?

@sajadspeed @JaekwanLee is that your case?

I don't know, I don't remember :)

[darrachequesne]

For future readers:

Please check our guide with React Native here: https://socket.io/how-to/use-with-react-native

Please reopen if needed.