fix: return 404 when method other than GET is requested

src/index.test.ts

@@ -72,6 +72,21 @@ describe('nextActuator', () => {
     })
   })
 
+  describe('http methods', () => {
+    const actuator = nextActuator()
+
+    test('returns 404 when method other than GET is used', async () => {
+      const { req, res } = httpMocks.createMocks({
+        method: 'POST',
+        url: '/actuator/health'
+      })
+
+      await actuator(req, res)
+
+      expect(res._getStatusCode()).toBe(404)
+    })
+  })
+
   describe('config', () => {
     it('returns 404 with endpoints disabled', async () => {
       const actuator = nextActuator({

src/index.ts

@@ -21,6 +21,10 @@ export function nextActuator(config: Partial<Config> = {}): NextApiHandler {
   } = config
 
   return async (req, res) => {
+    if (req.method?.toUpperCase() !== 'GET') {
+      return res.status(404).end()
+    }
+
     if (req.url == null || req.url === '') {
       res.status(404).end()
       return