feat(solidstart): Filter out low quality transactions for build assets

packages/solidstart/src/server/sdk.ts

@@ -1,6 +1,7 @@
 import { applySdkMetadata } from '@sentry/core';
 import type { NodeClient, NodeOptions } from '@sentry/node';
 import { init as initNodeSdk } from '@sentry/node';
+import { filterLowQualityTransactions } from './utils';
 
 /**
  * Initializes the server side of the Solid Start SDK
@@ -11,6 +12,7 @@ export function init(options: NodeOptions): NodeClient | undefined {
   };
 
   applySdkMetadata(opts, 'solidstart', ['solidstart', 'node']);
+  filterLowQualityTransactions(opts);
 
   return initNodeSdk(opts);
 }

packages/solidstart/src/server/utils.ts

@@ -1,4 +1,5 @@
-import { flush } from '@sentry/node';
+import { flush, getGlobalScope } from '@sentry/node';
+import type { EventProcessor, Options } from '@sentry/types';
 import { logger } from '@sentry/utils';
 import { DEBUG_BUILD } from '../common/debug-build';
 
@@ -31,3 +32,26 @@ export function isRedirect(error: unknown): boolean {
   const hasValidStatus = error.status >= 300 && error.status <= 308;
   return hasValidLocation && hasValidStatus;
 }
+
+/**
+ * Adds an event processor to filter out low quality transactions,
+ * e.g. to filter out transactions for build assets
+ */
+export function filterLowQualityTransactions(options: Options): void {
+  getGlobalScope().addEventProcessor(
+    Object.assign(
+      (event => {
+        if (event.type !== 'transaction') {
+          return event;
+        }
+        // Filter out transactions for build assets
+        if (event.transaction?.match(/^GET \/_build\//)) {
+          options.debug && logger.log('SolidStartLowQualityTransactionsFilter filtered transaction', event.transaction);
+          return null;
+        }
+        return event;
+      }) satisfies EventProcessor,
+      { id: 'SolidStartLowQualityTransactionsFilter' },
+    ),
+  );
+}

packages/solidstart/test/server/sdk.test.ts

@@ -1,7 +1,7 @@
+import type { NodeClient } from '@sentry/node';
 import { SDK_VERSION } from '@sentry/node';
 import * as SentryNode from '@sentry/node';
-
-import { vi } from 'vitest';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
 import { init as solidStartInit } from '../../src/server';
 
 const browserInit = vi.spyOn(SentryNode, 'init');
@@ -33,4 +33,38 @@ describe('Initialize Solid Start SDK', () => {
     expect(browserInit).toHaveBeenCalledTimes(1);
     expect(browserInit).toHaveBeenLastCalledWith(expect.objectContaining(expectedMetadata));
   });
+
+  it('filters out low quality transactions', async () => {
+    const beforeSendEvent = vi.fn(event => event);
+    const client = solidStartInit({
+      dsn: 'https://public@dsn.ingest.sentry.io/1337',
+    }) as NodeClient;
+    client.on('beforeSendEvent', beforeSendEvent);
+
+    client.captureEvent({ type: 'transaction', transaction: 'GET /' });
+    client.captureEvent({ type: 'transaction', transaction: 'GET /_build/some_asset.js' });
+    client.captureEvent({ type: 'transaction', transaction: 'POST /_server' });
+
+    await client!.flush();
+
+    expect(beforeSendEvent).toHaveBeenCalledTimes(2);
+    expect(beforeSendEvent).toHaveBeenCalledWith(
+      expect.objectContaining({
+        transaction: 'GET /',
+      }),
+      expect.any(Object),
+    );
+    expect(beforeSendEvent).not.toHaveBeenCalledWith(
+      expect.objectContaining({
+        transaction: 'GET /_build/some_asset.js',
+      }),
+      expect.any(Object),
+    );
+    expect(beforeSendEvent).toHaveBeenCalledWith(
+      expect.objectContaining({
+        transaction: 'POST /_server',
+      }),
+      expect.any(Object),
+    );
+  });
 });

packages/types/src/eventprocessor.ts

@@ -1,7 +1,7 @@
 import type { Event, EventHint } from './event';
 
 /**
- * Event processors are used to change the event before it will be send.
+ * Event processors are used to change the event before it will be sent.
  * We strongly advise to make this function sync.
  * Returning a PromiseLike<Event | null> will work just fine, but better be sure that you know what you are doing.
  * Event processing will be deferred until your Promise is resolved.