feat(client): add request_id to .withResponse()

src/core.ts

@@ -138,8 +138,11 @@ export class APIPromise<T> extends Promise<WithRequestID<T>> {
   asResponse(): Promise<Response> {
     return this.responsePromise.then((p) => p.response);
   }
+
   /**
-   * Gets the parsed response data and the raw `Response` instance.
+   * Gets the parsed response data, the raw `Response` instance and the ID of the request,
+   * returned via the X-Request-ID header which is useful for debugging requests and reporting
+   * issues to OpenAI.
    *
    * If you just want to get the raw `Response` instance without parsing it,
    * you can use {@link asResponse()}.
@@ -151,9 +154,9 @@ export class APIPromise<T> extends Promise<WithRequestID<T>> {
    * - `import 'openai/shims/node'` (if you're running on Node)
    * - `import 'openai/shims/web'` (otherwise)
    */
-  async withResponse(): Promise<{ data: T; response: Response }> {
+  async withResponse(): Promise<{ data: T; response: Response; request_id: string | null | undefined }> {
     const [data, response] = await Promise.all([this.parse(), this.asResponse()]);
-    return { data, response };
+    return { data, response, request_id: response.headers.get('x-request-id') };
   }
 
   private parse(): Promise<WithRequestID<T>> {

tests/responses.test.ts

@@ -41,6 +41,27 @@ describe('request id', () => {
     compareType<Awaited<APIPromise<Array<{ foo: string }>>>, Array<{ foo: string }>>(true);
   });
 
+  test('withResponse', async () => {
+    const client = new OpenAI({
+      apiKey: 'dummy',
+      fetch: async () =>
+        new Response(JSON.stringify({ id: 'bar' }), {
+          headers: { 'x-request-id': 'req_id_xxx', 'content-type': 'application/json' },
+        }),
+    });
+
+    const {
+      data: completion,
+      response,
+      request_id,
+    } = await client.chat.completions.create({ messages: [], model: 'gpt-4' }).withResponse();
+
+    expect(request_id).toBe('req_id_xxx');
+    expect(response.headers.get('x-request-id')).toBe('req_id_xxx');
+    expect(completion.id).toBe('bar');
+    expect(JSON.stringify(completion)).toBe('{"id":"bar"}');
+  });
+
   test('object response', async () => {
     const client = new OpenAI({
       apiKey: 'dummy',