fix(in-app): send app identifier header to gist - #812
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Gist needs to know which app a request came from so the backend can filter messages by platform and app. Send the host app's package name as X-CIO-App-Identifier alongside the existing platform header, from the shared header builder so both the queue fetch and the SSE connect carry it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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## main #812 +/- ##
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- Coverage 69.07% 66.43% -2.64%
- Complexity 838 1539 +701
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Files 149 245 +96
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Branches 628 1443 +815
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- Misses 1189 2482 +1293
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…ifier Aligns with the X-CIO-Client-* naming the other client headers use. The test now spells the wire name out instead of reading the constant, so a rename of the constant's value cannot slip through. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
mahmoud-elmorabea
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## [4.20.2](4.20.1...4.20.2) (2026-08-21) ### Bug Fixes * **in-app:** send app identifier header to gist ([#812](#812)) ([bbd5616](bbd5616))
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https://linear.app/customerio/issue/INAPP-14655/mobile-add-app-identifier-header-for-app-filtering
Summary
Gist needs to know which app a request came from so the backend can filter messages by platform and app. The SDK now sends the host app's package name as
X-CIO-Client-App-Identifieralongside the platform header it already sends.The header is added in
NetworkUtilities.addCommonHeaders, whose only two callers are the queue fetch client (Queue.createHttpClient) and the SSE connect interceptor (SseService.createSseHttpClient) — so one header set rides fetch and SSE alike. No query-parameter variant is needed on mobile: native SSE clients set headers, and only gist-web passesplatform=webas a query param because browserEventSourcecannot.Changes
X-CIO-Client-App-Identifier: <package name>on every gist request, sourced fromapplicationStore.customerPackageName.SDKComponent.android()lookup into a local and grouped the client/app headers together.Wrappers
React Native, Expo and Flutter all initialize the native SDK with the host
Application(reactContext.applicationContext/ the plugin'sapplication), so the header carries the host app'sapplicationId, not a wrapper id. The platform header still reports the wrapper (e.g.reactnative-android). A test locks this in by overriding the SDK source and asserting the app identifier is unchanged.Note for backend registration: on Android this value is the Gradle
applicationId, so it picks up per-variant suffixes (e.g.applicationIdSuffix ".debug").Test plan
New
NetworkUtilitiesTestcovers the fetch variant, the SSE variant (includeUserToken = false), and the wrapper-source case.:messaginginapp:runJacocoTestReport— 522 tests, 0 failures. ktlint andapiCheckclean (the constant isinternal, so no public API change).Verified on a Pixel 10 Pro emulator (API 36,
kotlin_composesample) with a temporary header probe, since the SDK has no request logging. Both requests carried the header:The sample workspace does not return
X-CIO-Use-SSE: true, so the SSE flag was forced locally to make the connect fire. Both the probe and the forced flag were reverted before committing.🤖 Generated with Claude Code
Note
Low Risk
Additive, internal header on existing Gist clients with unit coverage; no changes to auth, tokens, or public API.
Overview
Gist in-app traffic now includes
X-CIO-Client-App-Identifieron every request that usesNetworkUtilities.addCommonHeaders(queue fetch and SSE connect). The value is the host app’sapplicationStore.customerPackageName(GradleapplicationId), so backend filtering can distinguish apps while the existing platform header still reflects wrapper sources likereactnative-android.addCommonHeadersalso hoists a singleSDKComponent.android()lookup and groups the client metadata headers together.NetworkUtilitiesTestasserts the wire header name and value for fetch, SSE (includeUserToken = false), and a React Native–style client override where the app id stays the host package.Reviewed by Cursor Bugbot for commit 6fb0e9d. Bugbot is set up for automated code reviews on this repo. Configure here.