Some beforeSend event changes are ignored on Android

[avr6ude]

OS:

• Windows
• MacOS
• Linux

Platform:

• iOS
• Android

SDK:

• @sentry/react-native (>= 1.0.0)
• react-native-sentry (<= 0.43.2)

SDK version: 5.1.1

react-native version: 0.70.5

Are you using Expo?

• Yes
• No

Are you using sentry.io or on-premise?

• sentry.io (SaaS)
• on-premise

If you are using sentry.io, please post a link to your issue so we can take a look:

[Link to issue]

Configuration:

(@sentry/react-native)

Sentry.init({
  dsn: env.SENTRY_DSN,
  tracesSampleRate: 1.0,
  environment: __DEV__ ? 'development' : 'production',
  beforeSend(event) {
    delete event.user
    delete event.contexts?.device
    delete event.environment
    delete event.contexts?.os?.version
    delete event.contexts?.os?.kernel_version

    return event
  },
  ignoreErrors: ['HTTPClientError', 'ReferenceError', 'TypeError'],
});

---

I have following issue:

App running on Android ignores delete flags. That causes Sentry to log things I don't want (like device info) on Android. Works flawlessly on iOS.

Steps to reproduce:

• Delete information you don't want to be sent
• Invoke an event that Sentry captures
• Look at the logs for Android and iOS

Actual result:

delete is ignored on Android

Expected result:

delete should not be ignored

[krystofwoldrich]

Hi, thank you for the details.

This is caused by the way we currently enrich the contexts on Android. We send the event from JS to Android after the JS beforeSend and there we add the information.

Some of the values can be removed by providing some placeholder value like <retracted>.

This won't work for contexts.os as Android will add the value always.

  beforeSend: (event: Sentry.Event) => {
    event.user = {
      id: '<retracted>',
    }
    event.environment = '<retracted>'
    event.contexts = event.contexts || {}
    event.contexts.device = {
      type: '<retracted>',
    }
    // This won't work as Android will add a new os object to the contexts
    // event.contexts.os = event.contexts.os || {}
    // event.contexts.os.version = '<retracted>'
    // event.contexts.os.kernel_version = '<retracted>'
    return event;
  },

• related to Align how we enrich the event with device context on Hybrid SDKs team-mobile#11

[krystofwoldrich]

Closing this as we track it in getsentry/team-mobile#11