feat(nextjs): Support new async APIs (headers(), params, searchParams)

dev-packages/e2e-tests/test-applications/nextjs-14/app/generation-functions/page.tsx

@@ -7,33 +7,31 @@ export default function Page() {
   return <p>Hello World!</p>;
 }
 
-export async function generateMetadata({
-  searchParams,
-}: {
-  searchParams: { [key: string]: string | string[] | undefined };
-}) {
+export async function generateMetadata({ searchParams }: { searchParams: any }) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedSearchParams = await searchParams;
+
   Sentry.setTag('my-isolated-tag', true);
   Sentry.setTag('my-global-scope-isolated-tag', getDefaultIsolationScope().getScopeData().tags['my-isolated-tag']); // We set this tag to be able to assert that the previously set tag has not leaked into the global isolation scope
 
-  if (searchParams['shouldThrowInGenerateMetadata']) {
+  if (normalizedSearchParams['shouldThrowInGenerateMetadata']) {
     throw new Error('generateMetadata Error');
   }
 
   return {
-    title: searchParams['metadataTitle'] ?? 'not set',
+    title: normalizedSearchParams['metadataTitle'] ?? 'not set',
   };
 }
 
-export function generateViewport({
-  searchParams,
-}: {
-  searchParams: { [key: string]: string | undefined };
-}) {
-  if (searchParams['shouldThrowInGenerateViewport']) {
+export async function generateViewport({ searchParams }: { searchParams: any }) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedSearchParams = await searchParams;
+
+  if (normalizedSearchParams['shouldThrowInGenerateViewport']) {
     throw new Error('generateViewport Error');
   }
 
   return {
-    themeColor: searchParams['viewportThemeColor'] ?? 'black',
+    themeColor: normalizedSearchParams['viewportThemeColor'] ?? 'black',
   };
 }

dev-packages/e2e-tests/test-applications/nextjs-14/app/propagation/utils.ts

@@ -26,8 +26,8 @@ export function makeHttpRequest(url: string) {
   });
 }
 
-export function checkHandler() {
-  const headerList = headers();
+export async function checkHandler() {
+  const headerList = await headers();
 
   const headerObj: Record<string, unknown> = {};
   headerList.forEach((value, key) => {

dev-packages/e2e-tests/test-applications/nextjs-15/app/ppr-error/[param]/page.tsx

@@ -3,10 +3,13 @@ import * as Sentry from '@sentry/nextjs';
 export default async function Page({
   searchParams,
 }: {
-  searchParams: { id?: string };
+  searchParams: any;
 }) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedSearchParams = await searchParams;
+
   try {
-    console.log(searchParams.id); // Accessing a field on searchParams will throw the PPR error
+    console.log(normalizedSearchParams.id); // Accessing a field on searchParams will throw the PPR error
   } catch (e) {
     Sentry.captureException(e); // This error should not be reported
     await new Promise(resolve => setTimeout(resolve, 1000)); // Wait for any async event processors to run

dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/client-component/parameter/[...parameters]/page.tsx

@@ -1,10 +1,14 @@
+import { use } from 'react';
 import { ClientErrorDebugTools } from '../../../../components/client-error-debug-tools';
 
-export default function Page({ params }: { params: Record<string, string> }) {
+export default function Page({ params }: any) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedParams = 'then' in params ? use(params) : params;
+
   return (
     <div style={{ border: '1px solid lightgrey', padding: '12px' }}>
       <h2>Page (/client-component/[...parameters])</h2>
-      <p>Params: {JSON.stringify(params['parameters'])}</p>
+      <p>Params: {JSON.stringify(normalizedParams['parameters'])}</p>
       <ClientErrorDebugTools />
     </div>
   );

dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/client-component/parameter/[parameter]/page.tsx

@@ -1,10 +1,14 @@
+import { use } from 'react';
 import { ClientErrorDebugTools } from '../../../../components/client-error-debug-tools';
 
-export default function Page({ params }: { params: Record<string, string> }) {
+export default function Page({ params }: any) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedParams = 'then' in params ? use(params) : params;
+
   return (
     <div style={{ border: '1px solid lightgrey', padding: '12px' }}>
       <h2>Page (/client-component/[parameter])</h2>
-      <p>Parameter: {JSON.stringify(params['parameter'])}</p>
+      <p>Parameter: {JSON.stringify(normalizedParams['parameter'])}</p>
       <ClientErrorDebugTools />
     </div>
   );

dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/server-component/parameter/[...parameters]/page.tsx

@@ -1,12 +1,16 @@
+import { use } from 'react';
 import { ClientErrorDebugTools } from '../../../../components/client-error-debug-tools';
 
 export const dynamic = 'force-dynamic';
 
-export default async function Page({ params }: { params: Record<string, string> }) {
+export default function Page({ params }: any) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedParams = 'then' in params ? use(params) : params;
+
   return (
     <div style={{ border: '1px solid lightgrey', padding: '12px' }}>
       <h2>Page (/server-component/[...parameters])</h2>
-      <p>Params: {JSON.stringify(params['parameters'])}</p>
+      <p>Params: {JSON.stringify(normalizedParams['parameters'])}</p>
       <ClientErrorDebugTools />
     </div>
   );

dev-packages/e2e-tests/test-applications/nextjs-app-dir/app/server-component/parameter/[parameter]/page.tsx

@@ -1,12 +1,16 @@
+import { use } from 'react';
 import { ClientErrorDebugTools } from '../../../../components/client-error-debug-tools';
 
 export const dynamic = 'force-dynamic';
 
-export default async function Page({ params }: { params: Record<string, string> }) {
+export default function Page({ params }: any) {
+  // We need to dynamically check for this because Next.js made the API async for Next.js 15 and we use this test in canary tests
+  const normalizedParams = 'then' in params ? use(params) : params;
+
   return (
     <div style={{ border: '1px solid lightgrey', padding: '12px' }}>
       <h2>Page (/server-component/[parameter])</h2>
-      <p>Parameter: {JSON.stringify(params['parameter'])}</p>
+      <p>Parameter: {JSON.stringify(normalizedParams['parameter'])}</p>
       <ClientErrorDebugTools />
     </div>
   );

packages/nextjs/src/common/withServerActionInstrumentation.ts

@@ -15,7 +15,18 @@ import { vercelWaitUntil } from './utils/vercelWaitUntil';
 
 interface Options {
   formData?: FormData;
-  headers?: Headers;
+
+  /**
+   * Headers as returned from `headers()`.
+   *
+   * Currently accepts both a plain `Headers` object and `Promise<ReadonlyHeaders>` to be compatible with async APIs introduced in Next.js 15: https://github.com/vercel/next.js/pull/68812
+   */
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  headers?: Headers | Promise<any>;
+
+  /**
+   * Whether the server action response should be included in any events captured within the server action.
+   */
   recordResponse?: boolean;
 }
 
@@ -55,16 +66,17 @@ async function withServerActionInstrumentationImplementation<A extends (...args:
   callback: A,
 ): Promise<ReturnType<A>> {
   return escapeNextjsTracing(() => {
-    return withIsolationScope(isolationScope => {
+    return withIsolationScope(async isolationScope => {
       const sendDefaultPii = getClient()?.getOptions().sendDefaultPii;
 
       let sentryTraceHeader;
       let baggageHeader;
       const fullHeadersObject: Record<string, string> = {};
       try {
-        sentryTraceHeader = options.headers?.get('sentry-trace') ?? undefined;
-        baggageHeader = options.headers?.get('baggage');
-        options.headers?.forEach((value, key) => {
+        const awaitedHeaders: Headers = await options.headers;
+        sentryTraceHeader = awaitedHeaders?.get('sentry-trace') ?? undefined;
+        baggageHeader = awaitedHeaders?.get('baggage');
+        awaitedHeaders?.forEach((value, key) => {
           fullHeadersObject[key] = value;
         });
       } catch (e) {