feat(react-router): Add server action instrumentation

dev-packages/e2e-tests/test-applications/react-router-7-framework/app/routes.ts

@@ -16,5 +16,6 @@ export default [
     route('with/:param', 'routes/performance/dynamic-param.tsx'),
     route('static', 'routes/performance/static.tsx'),
     route('server-loader', 'routes/performance/server-loader.tsx'),
+    route('server-action', 'routes/performance/server-action.tsx'),
   ]),
 ] satisfies RouteConfig;

dev-packages/e2e-tests/test-applications/react-router-7-framework/app/routes/performance/server-action.tsx

@@ -0,0 +1,24 @@
+import { Form } from 'react-router';
+import type { Route } from './+types/server-action';
+
+export async function action({ request }: Route.ActionArgs) {
+  let formData = await request.formData();
+  let name = formData.get('name');
+  await new Promise(resolve => setTimeout(resolve, 1000));
+  return {
+    greeting: `Hola ${name}`,
+  };
+}
+
+export default function Project({ actionData }: Route.ComponentProps) {
+  return (
+    <div>
+      <h1>Server action page</h1>
+      <Form method="post">
+        <input type="text" name="name" />
+        <button type="submit">Submit</button>
+      </Form>
+      {actionData ? <p>{actionData.greeting}</p> : null}
+    </div>
+  );
+}

dev-packages/e2e-tests/test-applications/react-router-7-framework/tests/performance/performance.server.test.ts

@@ -132,4 +132,31 @@ test.describe('servery - performance', () => {
       origin: 'auto.http.react-router',
     });
   });
+
+  test('should automatically instrument server action', async ({ page }) => {
+    const txPromise = waitForTransaction(APP_NAME, async transactionEvent => {
+      return transactionEvent.transaction === 'POST /performance/server-action.data';
+    });
+
+    await page.goto(`/performance/server-action`);
+    await page.getByRole('button', { name: 'Submit' }).click(); // this will trigger a .data request
+
+    const transaction = await txPromise;
+
+    expect(transaction?.spans?.[transaction.spans?.length - 1]).toMatchObject({
+      span_id: expect.any(String),
+      trace_id: expect.any(String),
+      data: {
+        'sentry.origin': 'auto.http.react-router',
+        'sentry.op': 'function.react-router.action',
+      },
+      description: 'Executing Server Action',
+      parent_span_id: expect.any(String),
+      start_timestamp: expect.any(Number),
+      timestamp: expect.any(Number),
+      status: 'ok',
+      op: 'function.react-router.action',
+      origin: 'auto.http.react-router',
+    });
+  });
 });

packages/react-router/src/server/sdk.ts

@@ -45,7 +45,7 @@ export function init(options: NodeOptions): NodeClient | undefined {
         const overwrite = event.contexts?.trace?.data?.[SEMANTIC_ATTRIBUTE_SENTRY_OVERWRITE];
         if (
           event.type === 'transaction' &&
-          event.transaction === 'GET *' &&
+          (event.transaction === 'GET *' || event.transaction === 'POST *') &&
           event.contexts?.trace?.data?.[ATTR_HTTP_ROUTE] === '*' &&
           overwrite
         ) {