snowplow · igneel64 · Apr 18, 2025
diff --git a/api-docs/docs/browser-tracker/browser-tracker.api.md b/api-docs/docs/browser-tracker/browser-tracker.api.md
@@ -219,12 +219,14 @@ export function discardHashTag(enable: boolean, trackers?: Array<string>): void;
 export interface EmitterConfigurationBase {
     bufferSize?: number;
     connectionTimeout?: number;
+    cookieExtensionService?: string;
     credentials?: "omit" | "same-origin" | "include";
     customFetch?: (input: Request, options?: RequestInit) => Promise<Response>;
     customHeaders?: Record<string, string>;
     dontRetryStatusCodes?: number[];
     eventMethod?: EventMethod;
     eventStore?: EventStore;
+    // @deprecated (undocumented)
     idService?: string;
     keepalive?: boolean;
     maxGetBytes?: number;

diff --git a/api-docs/docs/node-tracker/node-tracker.api.md b/api-docs/docs/node-tracker/node-tracker.api.md
@@ -244,12 +244,14 @@ export interface EmitterConfiguration extends EmitterConfigurationBase {
 export interface EmitterConfigurationBase {
     bufferSize?: number;
     connectionTimeout?: number;
+    cookieExtensionService?: string;
     credentials?: "omit" | "same-origin" | "include";
     customFetch?: (input: Request, options?: RequestInit) => Promise<Response>;
     customHeaders?: Record<string, string>;
     dontRetryStatusCodes?: number[];
     eventMethod?: EventMethod;
     eventStore?: EventStore;
+    // @deprecated (undocumented)
     idService?: string;
     keepalive?: boolean;
     maxGetBytes?: number;

diff --git a/api-docs/docs/react-native-tracker/react-native-tracker.api.md b/api-docs/docs/react-native-tracker/react-native-tracker.api.md
@@ -120,13 +120,15 @@ export interface EmitterConfiguration extends EmitterConfigurationBase {
 export interface EmitterConfigurationBase {
     bufferSize?: number;
     connectionTimeout?: number;
+    cookieExtensionService?: string;
     credentials?: "omit" | "same-origin" | "include";
     customFetch?: (input: Request, options?: RequestInit) => Promise<Response>;
     customHeaders?: Record<string, string>;
     dontRetryStatusCodes?: number[];
     eventMethod?: EventMethod;
     // Warning: (ae-forgotten-export) The symbol "EventStore" needs to be exported by the entry point index.d.ts
     eventStore?: EventStore;
+    // @deprecated (undocumented)
     idService?: string;
     keepalive?: boolean;
     maxGetBytes?: number;

diff --git a/...s/@snowplow/browser-tracker-core/feature-AISP-306-rename-id-service_2025-04-18-06-53.json b/...s/@snowplow/browser-tracker-core/feature-AISP-306-rename-id-service_2025-04-18-06-53.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/browser-tracker-core",
+      "comment": "Add `cookieExtensionService` argument as replacement for `idService`, deprecated `idService`",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/browser-tracker-core"
+}
diff --git a/...n/changes/@snowplow/tracker-core/feature-AISP-306-rename-id-service_2025-04-18-06-53.json b/...n/changes/@snowplow/tracker-core/feature-AISP-306-rename-id-service_2025-04-18-06-53.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@snowplow/tracker-core",
+      "comment": "Add `cookieExtensionService` argument as replacement for `idService`, deprecate `idService`",
+      "type": "none"
+    }
+  ],
+  "packageName": "@snowplow/tracker-core"
+}
diff --git a/libraries/browser-tracker-core/test/out_queue.test.ts b/libraries/browser-tracker-core/test/out_queue.test.ts
@@ -193,8 +193,8 @@ describe('OutQueueManager', () => {
     });
   });
 
-  describe('idService requests', () => {
-    const idServiceEndpoint = 'http://example.com/id';
+  describe('cookieExtensionService requests', () => {
+    const cookieExtensionServiceEndpoint = 'http://example.com/id';
 
     const getQuerystring = (p: object) =>
       '?' +
@@ -203,85 +203,87 @@ describe('OutQueueManager', () => {
         .join('&');
 
     describe('GET requests', () => {
-      let createGetQueue = () => newOutQueue(
-        {
-          endpoint: 'http://example.com',
-          trackerId: 'sp',
-          eventMethod: 'get',
-          useStm: false,
-          maxLocalStorageQueueSize: maxQueueSize,
-          eventStore,
-          customFetch,
-          idService: idServiceEndpoint,
-        },
-        new SharedState()
-      );
-
+      let createGetQueue = () =>
+        newOutQueue(
+          {
+            endpoint: 'http://example.com',
+            trackerId: 'sp',
+            eventMethod: 'get',
+            useStm: false,
+            maxLocalStorageQueueSize: maxQueueSize,
+            eventStore,
+            customFetch,
+            cookieExtensionService: cookieExtensionServiceEndpoint,
+          },
+          new SharedState()
+        );
 
-      it('should first execute the idService request and in the same `enqueueRequest` the tracking request', async () => {
+      it('should first execute the cookieExtensionService request and in the same `enqueueRequest` the tracking request', async () => {
         const request = { e: 'pv', eid: '65cb78de-470c-4764-8c10-02bd79477a3a' };
         const getQueue = createGetQueue();
 
         await getQueue.enqueueRequest(request);
 
         expect(requests).toHaveLength(2);
-        expect(requests[0].url).toEqual(idServiceEndpoint);
+        expect(requests[0].url).toEqual(cookieExtensionServiceEndpoint);
         expect(requests[1].url).toEqual('http://example.com/i' + getQuerystring(request));
       });
 
-      it('should first execute the idService request and in the same `enqueueRequest` the tracking request irregardless of failure of the idService endpoint', async () => {
+      it('should first execute the cookieExtensionService request and in the same `enqueueRequest` the tracking request irregardless of failure of the cookieExtensionService endpoint', async () => {
         const request = { e: 'pv', eid: '65cb78de-470c-4764-8c10-02bd79477a3a' };
         const getQueue = createGetQueue();
 
         responseStatusCode = 500;
         await getQueue.enqueueRequest(request);
 
         expect(requests).toHaveLength(2);
-        expect(requests[0].url).toEqual(idServiceEndpoint);
+        expect(requests[0].url).toEqual(cookieExtensionServiceEndpoint);
         expect(requests[1].url).toEqual('http://example.com/i' + getQuerystring(request));
         expect(await eventStore.count()).toEqual(1);
       });
     });
 
     describe('POST requests', () => {
-      let createPostQueue = () => newOutQueue(
-        {
-          endpoint: 'http://example.com',
-          trackerId: 'sp',
-          eventMethod: 'post',
-          eventStore,
-          customFetch,
-          idService: idServiceEndpoint,
-        },
-        new SharedState()
-      );
+      let createPostQueue = () =>
+        newOutQueue(
+          {
+            endpoint: 'http://example.com',
+            trackerId: 'sp',
+            eventMethod: 'post',
+            eventStore,
+            customFetch,
+            cookieExtensionService: cookieExtensionServiceEndpoint,
+          },
+          new SharedState()
+        );
 
-      it('should first execute the idService request and in the same `enqueueRequest` the tracking request irregardless of failure of the idService endpoint', async () => {
+      it('should first execute the cookieExtensionService request and in the same `enqueueRequest` the tracking request irregardless of failure of the cookieExtensionService endpoint', async () => {
         const request = { e: 'pv', eid: '65cb78de-470c-4764-8c10-02bd79477a3a' };
         const postQueue = createPostQueue();
 
         await postQueue.enqueueRequest(request);
 
         expect(requests).toHaveLength(2);
-        expect(requests[0].url).toEqual(idServiceEndpoint);
+        expect(requests[0].url).toEqual(cookieExtensionServiceEndpoint);
         expect(requests[1].url).toEqual('http://example.com/com.snowplowanalytics.snowplow/tp2');
       });
     });
   });
 
   describe('retryFailures = true', () => {
     const request = { e: 'pv', eid: '65cb78de-470c-4764-8c10-02bd79477a3a' };
-    let createOutQueue = () => newOutQueue(
-      {
-        endpoint: 'http://example.com',
-        trackerId: 'sp',
-        eventMethod: 'post',
-        retryFailedRequests: true,
-        eventStore,
-        customFetch,
-      },
-      new SharedState()
-    );
+    let createOutQueue = () =>
+      newOutQueue(
+        {
+          endpoint: 'http://example.com',
+          trackerId: 'sp',
+          eventMethod: 'post',
+          retryFailedRequests: true,
+          eventStore,
+          customFetch,
+        },
+        new SharedState()
+      );
 
     it('should remain in queue on failure', async () => {
       let outQueue = createOutQueue();
@@ -295,17 +297,18 @@ describe('OutQueueManager', () => {
 
   describe('retryFailures = false', () => {
     const request = { e: 'pv', eid: '65cb78de-470c-4764-8c10-02bd79477a3a' };
-    let createOutQueue = () => newOutQueue(
-      {
-        endpoint: 'http://example.com',
-        trackerId: 'sp',
-        eventMethod: 'post',
-        retryFailedRequests: false,
-        eventStore,
-        customFetch,
-      },
-      new SharedState()
-    );
+    let createOutQueue = () =>
+      newOutQueue(
+        {
+          endpoint: 'http://example.com',
+          trackerId: 'sp',
+          eventMethod: 'post',
+          retryFailedRequests: false,
+          eventStore,
+          customFetch,
+        },
+        new SharedState()
+      );
 
     it('should remove from queue on failure', async () => {
       let outQueue = createOutQueue();
@@ -441,23 +444,23 @@ describe('OutQueueManager', () => {
   describe('onRequestFailure', () => {
     const request = { e: 'pv', eid: '65cb78de-470c-4764-8c10-02bd79477a3a' };
 
-  const createQueue = (args: createQueueArgs) =>
-    newOutQueue(
-      {
-        endpoint: 'http://example.com',
-        trackerId: 'sp',
-        eventMethod: args.method,
-        maxPostBytes: args.maxPostBytes,
-        maxGetBytes: args.maxGetBytes,
-        maxLocalStorageQueueSize: maxQueueSize,
-        onRequestSuccess: args.onSuccess,
-        onRequestFailure: args.onFailure,
-        dontRetryStatusCodes: [500],
-        customFetch,
-        eventStore,
-      },
-      new SharedState()
-    );
+    const createQueue = (args: createQueueArgs) =>
+      newOutQueue(
+        {
+          endpoint: 'http://example.com',
+          trackerId: 'sp',
+          eventMethod: args.method,
+          maxPostBytes: args.maxPostBytes,
+          maxGetBytes: args.maxGetBytes,
+          maxLocalStorageQueueSize: maxQueueSize,
+          onRequestSuccess: args.onSuccess,
+          onRequestFailure: args.onFailure,
+          dontRetryStatusCodes: [500],
+          customFetch,
+          eventStore,
+        },
+        new SharedState()
+      );
 
     describe('POST requests', () => {
       const method = 'post';

diff --git a/libraries/tracker-core/src/emitter/index.ts b/libraries/tracker-core/src/emitter/index.ts
@@ -107,11 +107,15 @@ export interface EmitterConfigurationBase {
    */
   dontRetryStatusCodes?: number[];
   /**
-   * Id service full URL. This URL will be added to the queue and will be called using a GET method.
+   * Cookie extension service full URL. This URL will be added to the queue and will be called using a GET method.
    * This option is there to allow the service URL to be called in order to set any required identifiers e.g. extra cookies.
    *
    * The request respects the `anonymousTracking` option, including the SP-Anonymous header if needed, and any additional custom headers from the customHeaders option.
    */
+  cookieExtensionService?: string;
+  /**
+   * @deprecated Use `cookieExtensionService` instead.
+   */
   idService?: string;
   /**
    * Indicates that the request should be allowed to outlive the webpage that initiated it.
@@ -208,6 +212,7 @@ export function newEmitter({
   serverAnonymization,
   connectionTimeout,
   keepalive,
+  cookieExtensionService,
   idService,
   dontRetryStatusCodes = [],
   retryStatusCodes = [],
@@ -219,7 +224,10 @@ export function newEmitter({
   eventStore = newInMemoryEventStore({}),
   credentials,
 }: EmitterConfiguration): Emitter {
-  let idServiceCalled = false;
+  /* `cookieExtensionService` gets priority until `idService` is completely removed. */
+  cookieExtensionService = cookieExtensionService || idService;
+
+  let cookieExtensionServiceCalled = false;
   let flushInProgress = false;
   const usePost = eventMethod.toLowerCase() === 'post';
   dontRetryStatusCodes = dontRetryStatusCodes.concat([400, 401, 403, 410, 422]);
@@ -349,10 +357,10 @@ export function newEmitter({
     }
   }
 
-  async function callIdService() {
-    if (idService && !idServiceCalled) {
-      idServiceCalled = true;
-      const request = new Request(idService, { method: 'GET' });
+  async function callCookieExtensionService() {
+    if (cookieExtensionService && !cookieExtensionServiceCalled) {
+      cookieExtensionServiceCalled = true;
+      const request = new Request(cookieExtensionService, { method: 'GET' });
       await customFetch(request);
     }
   }
@@ -372,7 +380,7 @@ export function newEmitter({
   }
 
   async function continueFlush() {
-    await callIdService();
+    await callCookieExtensionService();
 
     const request = newEmitterRequestWithConfig();
     const eventStoreIterator = eventStore.iterator();

diff --git a/libraries/tracker-core/test/emitter/index.test.ts b/libraries/tracker-core/test/emitter/index.test.ts
@@ -1,7 +1,7 @@
 import test from 'ava';
 
 import { newEmitter, Emitter } from '../../src/emitter';
-import { newInMemoryEventStore } from "../../src/event_store";
+import { newInMemoryEventStore } from '../../src/event_store';
 
 function createMockFetch(status: number, requests: Request[]) {
   return async (input: Request) => {
@@ -15,7 +15,7 @@ test.before(() => {
   console.error = () => {}; // Silence console.error globally
 });
 
-test("input adds an event to the event store", async (t) => {
+test('input adds an event to the event store', async (t) => {
   const requests: Request[] = [];
   const mockFetch = createMockFetch(200, requests);
   const eventStore = newInMemoryEventStore({});
@@ -26,7 +26,7 @@ test("input adds an event to the event store", async (t) => {
     eventStore,
   });
 
-  await emitter.input({ e: "pv" });
+  await emitter.input({ e: 'pv' });
 
   t.is(await eventStore.count(), 1);
   t.is(requests.length, 0);
@@ -288,7 +288,7 @@ test('makes a request to the id service only once', async (t) => {
   const emitter: Emitter = newEmitter({
     endpoint: 'https://example.com',
     customFetch: mockFetch,
-    idService: 'https://id-example.com',
+    cookieExtensionService: 'https://id-example.com',
   });
 
   await emitter.input({ e: 'pv' });
@@ -325,7 +325,7 @@ test('adds a timeout to the request', async (t) => {
     endpoint: 'https://example.com',
     customFetch: mockFetch,
     connectionTimeout: 100,
-    eventStore
+    eventStore,
   });
 
   await emitter.input({ e: 'pv' });