[Firebase AI] Add x-ios-bundle-identifier header to requests (#15515)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: Andrew Heard <andrewheard@google.com>

Author: google-labs-jules[bot]

FirebaseAI/CHANGELOG.md

@@ -1,3 +1,8 @@
+# 12.7.0
+- [fixed] Fixed support for API keys with iOS+ app
+  [Bundle ID restrictions](https://docs.cloud.google.com/docs/authentication/api-keys#adding-application-restrictions)
+  by setting the `x-ios-bundle-identifier` header. (#15475)
+
 # 12.6.0
 - [feature] Added support for
   [Server Prompt Templates](https://firebase.google.com/docs/ai-logic/server-prompt-templates/get-started).

FirebaseAI/Sources/GenerativeAIService.swift

@@ -179,6 +179,9 @@ struct GenerativeAIService {
     } else {
       urlRequest.setValue(firebaseInfo.apiKey, forHTTPHeaderField: "x-goog-api-key")
     }
+    if let bundleID = Bundle.main.bundleIdentifier {
+      urlRequest.setValue(bundleID, forHTTPHeaderField: "x-ios-bundle-identifier")
+    }
     urlRequest.setValue(
       "\(GenerativeAIService.languageTag) \(GenerativeAIService.firebaseVersionTag)",
       forHTTPHeaderField: "x-goog-api-client"

FirebaseAI/Sources/Types/Internal/Live/LiveSessionService.swift

@@ -365,6 +365,9 @@ actor LiveSessionService {
     var urlRequest = URLRequest(url: url)
     urlRequest.timeoutInterval = requestOptions.timeout
     urlRequest.setValue(firebaseInfo.apiKey, forHTTPHeaderField: "x-goog-api-key")
+    if let bundleID = Bundle.main.bundleIdentifier {
+      urlRequest.setValue(bundleID, forHTTPHeaderField: "x-ios-bundle-identifier")
+    }
     urlRequest.setValue(
       "\(GenerativeAIService.languageTag) \(GenerativeAIService.firebaseVersionTag)",
       forHTTPHeaderField: "x-goog-api-client"

FirebaseAI/Tests/Unit/TestUtilities/GenerativeModelTestUtil.swift

@@ -69,6 +69,9 @@ enum GenerativeModelTestUtil {
         XCTAssertEqual(firebaseAppID, dataCollection ? "My app ID" : nil)
         XCTAssertEqual(appVersion, dataCollection ? expectedAppVersion : nil)
 
+        let bundleID = request.value(forHTTPHeaderField: "x-ios-bundle-identifier")
+        XCTAssertEqual(bundleID, Bundle.main.bundleIdentifier)
+
         if let authToken {
           XCTAssertEqual(
             request.value(forHTTPHeaderField: "Authorization"),