Cedric van Putten
68055f2d8a
Summary: This is another attempt at fixing the Android HMR client for HTTPS proxied Metro instances. The previous one unintentionally [caused the following error](https://github.com/facebook/react-native/pull/48970#issuecomment-2617047184): ``` java.lang.AssertionError: Method overloading is unsupported: com.facebook.react.devsupport.HMRClient#setup ``` This PR removes the overloading, and only adds the `scheme` property as a parameter to the existing `.setup` method. Aligning with the exact behavior we have on iOS. The alternative fix, which should NOT be backward breaking (if this is) - is to move this "infer the protocol from the bundle URL" to the JS side of the HMR client. Where we don't just always default to `http`, but instead default to `https IF port === 443, otherwise http`. It's a bit more hacky, but shouldn't cause any other issues. _**Ideally**_, we have the same working behavior on both Android and iOS without workarounds. <details><summary>Alternative workaround</summary> See [this change](https://github.com/facebook/react-native/compare/main...byCedric:react-native:patch-2). <img width="1179" alt="image" src="https://github.com/user-attachments/assets/47c365bc-6df8-43e6-ad7d-5a667e350cd4" /> </details> See full explanation on https://github.com/facebook/react-native/issues/48970 > We've noticed that the HMR on Android doesn't seem to be connecting when using a HTTPS-proxied Metro instance, where the proxy is hosted through Cloudflare. This is only an issue on Android - not iOS - and likely caused by the HMR Client not being set up properly on Android. > >- On Android, we run `.setup('android', <bundleEntryPath>, <proxiedMetroHost>, <proxiedMetroPort>, <hmrEnabled>)` in the [**react/devsupport/DevSupportManagerBase.java**](https://github.com/facebook/react-native/blob/53d94c3abe3fcd2168b512652bc0169956bffa39/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSupportManagerBase.java#L689-L691) file. >- On iOS, we run `[self.callableJSModules invokeModule:@"HMRClient" method:@"setup" withArgs:@[ RCTPlatformName, path, host, RCTNullIfNil(port), @(isHotLoadingEnabled), scheme ]];` in the [**React/CoreModules /RCTDevSettings.mm**](https://github.com/facebook/react-native/blob/53d94c3abe3fcd2168b512652bc0169956bffa39/packages/react-native/React/CoreModules/RCTDevSettings.mm#L488-L491) file. > >Notice how Android does not pass in the scheme/protocol of the bundle URL, while iOS actually does? Unfortunately, because the default protocol (`http`) mismatches on Android when using HTTPS proxies, we actually try to connect the HMR client over `http` instead of `https` - while still using port 443 - which is rejected by Cloudflare's infrastructure even before we can redirect or mitigate this issue. And the rejection is valid, as we basically try to connect on `http://<host>:443` (the source URL is `https`, so the port is infered as `443`). > >This change adds scheme propagation to Android, exactly like we do on iOS for the HMR Client. ## Changelog: [ANDROID] [FIXED] Pass the bundle URL protocol when setting up HMR client on Android <!-- Help reviewers and the release process by writing your own changelog entry. Pick one each for the category and type tags: [ANDROID|GENERAL|IOS|INTERNAL] [BREAKING|ADDED|CHANGED|DEPRECATED|REMOVED|FIXED|SECURITY] - Message For more details, see: https://reactnative.dev/contributing/changelogs-in-pull-requests Pull Request resolved: https://github.com/facebook/react-native/pull/48998 Test Plan: See full explanation on https://github.com/facebook/react-native/issues/48970 > It's a little bit hard to test this out yourself, since you'd need a HTTPS-based proxy and reject HTTP connections for HTTPS/WSS Websocket requests. > >You can set this up through: >- `bun create expo@latest ./test-app` >- `cd ./test-app` >- `touch .env` >- Set `EXPO_PACKAGER_PROXY_URL=https://<proxied-metro-hostname>` in **.env** >- Set `REACT_NATIVE_PACKAGER_HOSTNAME=<proxied-metro-hostname>` in **.env** >- `bun run start` > >Setting both these envvars, the bundle URL in the manifest is set to `https://...` - which triggers this HMR issue on Android. You can validate the **.env** setup through: > >```bash >curl "http://localhost:8081" -H "expo-platform: android" | jq .launchAsset.url >``` > >This should point the entry bundle URL towards the `EXPO_PACKAGER_PROXY_URL`. Reviewed By: cortinico Differential Revision: D68768351 Pulled By: javache fbshipit-source-id: 49bf1dc60f11b2af6e57177141270632d62ab564
React Native
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