Text streaming not working on Android

[elisealix22]

First of all, thank you so much for providing this repo ❤️ . We use streams for our subscribe requests and I was able to integrate with your project in order to get streaming working on iOS. However, I'm still running into an issue where Android is behaving as it did before the web stream polyfill. I can see the subscribe request come through, but it just hangs and no data ever comes through.

I have a working demo here where the stream is fully functional on iOS but not on Android: xmtp/example-chat-react-native#8.

To reproduce, you can run the app & press Generate address. Then press Send gm. That should trigger a message to come through the stream. If you have a chance to take a look, I'm so curious what could be causing Android specifically to have trouble here.

JS env: Hermes
RN version: 0.71
All polyfills should be included as well in .polyfills.js

[elisealix22]

@acostalima tagging just so this doesn't get lost in the sea of notifications. I think we'll recommend a polling solution on our end for the time being but would love a quick glance if you get a chance!

[acostalima]

Thanks for reaching out @elisealix22.
I'm afraid I won't be able to address this in the short term. Furthermore, I haven't worked with RN since v0.64.

I haven't tested streaming against Hermes at the time. Does it work in JavaScriptCore, even on RN v0.71?
Did you check the changelogs of RN v0.64-0.71 to see if there were any changes to the Networking API?

[elisealix22]

Thank you so much for the response! This is excellent context. I'll give JSC a shot and check out the RN networking diff as I haven't tried either yet!

[fa2id]

@elisealix22 Hey, did you try this with the latest versions of RN? Is it working on iOS and Android? Thank you!

[a289459798]

0.71.7 same

[alessbell]

After doing a bit of investigating I've opened an issue for this over on the RN repo: facebook/react-native#39260

Edit: this doesn't actually appear to be related (but probably still a bug) 😅

[Raythode]

Hey guys, @alessbell The fetch works for Android but in release mode. To make it work on development mode do the following things. Cannot take full credit for this but I found this from here

Solution 1:

go to android/app/src/debug/java/com//ReactNativeFlipper.java
comment NetworkFlipperPlugin like this:
client.addPlugin(CrashReporterPlugin.getInstance());

// todo commented because of this issue binaryminds/react-native-sse#3 facebook/flipper#2495
// NetworkFlipperPlugin networkFlipperPlugin = new NetworkFlipperPlugin();
// NetworkingModule.setCustomClientBuilder(
// new NetworkingModule.CustomClientBuilder() {
// @OverRide
// public void apply(OkHttpClient.Builder builder) {
// builder.addNetworkInterceptor(new FlipperOkhttpInterceptor(networkFlipperPlugin));
// }
// });
// client.addPlugin(networkFlipperPlugin);
client.start();

Solution 2:

If you don't want to comment the NetworkFlipperPlugin.

This bug happen only in debug, so instead of running:

react-native run-android You have to run:
react-native run-android --variant=release Or simply change it in your package.json
{
// ...
"scripts": {
"android": "react-native run-android --variant=release", // here
"ios": "react-native run-ios",
"start": "react-native start",
"test": "jest",
"lint": "eslint . --ext .js,.jsx,.ts,.tsx"
},
// ...
}

[AkbarBakhshi]

// todo commented because of this issue binaryminds/react-native-sse#3 facebook/flipper#2495

@Raythode Thanks for the solutions. I commented NetworkFlipperPlugin as you mentioned in solution 1 and it worked. Follow-up question though: do I need to uncomment those for production? it seems like the fetch streaming should work for the release version according to your comment.