fix(websearch): align provider validation metadata

src/web-server/routes/websearch-routes.ts

@@ -9,6 +9,7 @@ import { getWebSearchReadiness, getWebSearchCliProviders } from '../../utils/web
 import {
   applyWebSearchApiKeyUpdates,
   getWebSearchApiKeyStates,
+  WEBSEARCH_API_KEY_PROVIDERS,
   type WebSearchApiKeyProviderId,
 } from '../../utils/websearch/provider-secrets';
 import { requireLocalAccessWhenAuthDisabled } from '../middleware/auth-middleware';
@@ -16,7 +17,6 @@ import { requireLocalAccessWhenAuthDisabled } from '../middleware/auth-middlewar
 const router = Router();
 const WEBSEARCH_LOCAL_ACCESS_ERROR =
   'WebSearch endpoints require localhost access when dashboard auth is disabled.';
-const WEBSEARCH_API_KEY_PROVIDER_IDS = ['exa', 'tavily', 'brave'] as const;
 
 type WebSearchApiKeyUpdates = Partial<Record<WebSearchApiKeyProviderId, string | null>>;
 
@@ -24,6 +24,10 @@ interface WebSearchDashboardPayload extends Partial<WebSearchConfig> {
   apiKeys?: WebSearchApiKeyUpdates;
 }
 
+function isWebSearchApiKeyProviderId(value: string): value is WebSearchApiKeyProviderId {
+  return Object.prototype.hasOwnProperty.call(WEBSEARCH_API_KEY_PROVIDERS, value);
+}
+
 router.use((req: Request, res: Response, next) => {
   if (requireLocalAccessWhenAuthDisabled(req, res, WEBSEARCH_LOCAL_ACCESS_ERROR)) {
     next();
@@ -88,7 +92,7 @@ router.put('/', (req: Request, res: Response): void => {
 
   if (apiKeys) {
     for (const [providerId, value] of Object.entries(apiKeys)) {
-      if (!WEBSEARCH_API_KEY_PROVIDER_IDS.includes(providerId as WebSearchApiKeyProviderId)) {
+      if (!isWebSearchApiKeyProviderId(providerId)) {
         res.status(400).json({ error: `Unsupported WebSearch provider: ${providerId}` });
         return;
       }

tests/unit/web-server/websearch-routes.test.ts

@@ -28,6 +28,17 @@ describe('websearch routes', () => {
   let originalEnvValues: Record<(typeof WEBSEARCH_ENV_KEYS)[number], string | undefined>;
   let forcedRemoteAddress = '127.0.0.1';
 
+  async function putWebsearch(
+    body: string | Record<string, unknown>,
+    headers: Record<string, string> = { 'Content-Type': 'application/json' }
+  ): Promise<Response> {
+    return fetch(`${baseUrl}/api/websearch`, {
+      method: 'PUT',
+      headers,
+      body: typeof body === 'string' ? body : JSON.stringify(body),
+    });
+  }
+
   beforeAll(async () => {
     const app = express();
     app.use(express.json());
@@ -278,11 +289,7 @@ describe('websearch routes', () => {
   });
 
   it('rejects non-object request bodies', async () => {
-    const response = await fetch(`${baseUrl}/api/websearch`, {
-      method: 'PUT',
-      headers: { 'Content-Type': 'application/json' },
-      body: '[]',
-    });
+    const response = await putWebsearch('[]');
 
     expect(response.status).toBe(400);
     expect(await response.json()).toEqual({
@@ -290,15 +297,16 @@ describe('websearch routes', () => {
     });
   });
 
+  it('rejects primitive JSON null bodies before route validation', async () => {
+    const response = await putWebsearch('null');
+    expect(response.status).toBe(400);
+  });
+
   it('rejects unsupported API key providers', async () => {
-    const response = await fetch(`${baseUrl}/api/websearch`, {
-      method: 'PUT',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({
-        apiKeys: {
-          invalid: 'secret',
-        },
-      }),
+    const response = await putWebsearch({
+      apiKeys: {
+        invalid: 'secret',
+      },
     });
 
     expect(response.status).toBe(400);
@@ -308,14 +316,10 @@ describe('websearch routes', () => {
   });
 
   it('rejects non-string API key values', async () => {
-    const response = await fetch(`${baseUrl}/api/websearch`, {
-      method: 'PUT',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({
-        apiKeys: {
-          exa: 123,
-        },
-      }),
+    const response = await putWebsearch({
+      apiKeys: {
+        exa: 123,
+      },
     });
 
     expect(response.status).toBe(400);
@@ -323,4 +327,31 @@ describe('websearch routes', () => {
       error: 'Invalid value for exa API key',
     });
   });
+
+  it('rejects null and array values for providers and apiKeys', async () => {
+    const invalidPayloads = [
+      {
+        body: { providers: null },
+        error: 'Invalid value for providers. Must be an object.',
+      },
+      {
+        body: { providers: [] },
+        error: 'Invalid value for providers. Must be an object.',
+      },
+      {
+        body: { apiKeys: null },
+        error: 'Invalid value for apiKeys. Must be an object.',
+      },
+      {
+        body: { apiKeys: [] },
+        error: 'Invalid value for apiKeys. Must be an object.',
+      },
+    ] as const;
+
+    for (const invalidPayload of invalidPayloads) {
+      const response = await putWebsearch(invalidPayload.body);
+      expect(response.status).toBe(400);
+      expect(await response.json()).toEqual({ error: invalidPayload.error });
+    }
+  });
 });