feat(powered-by): optional server name (#3492)

* refactor(powered-by): optional server name

* style(powered-by): format

* test(powered-by): test new config

* Update index.test.ts

src/middleware/powered-by/index.test.ts

@@ -11,6 +11,9 @@ describe('Powered by Middleware', () => {
   app.use('/poweredBy2/*', poweredBy())
   app.get('/poweredBy2', (c) => c.text('root'))
 
+  app.use('/poweredBy3/*', poweredBy({ serverName: 'Foo' }))
+  app.get('/poweredBy3', (c) => c.text('root'))
+
   it('Should return with X-Powered-By header', async () => {
     const res = await app.request('http://localhost/poweredBy')
     expect(res).not.toBeNull()
@@ -24,4 +27,11 @@ describe('Powered by Middleware', () => {
     expect(res.status).toBe(200)
     expect(res.headers.get('X-Powered-By')).toBe('Hono')
   })
+
+  it('Should return custom serverName', async () => {
+    const res = await app.request('http://localhost/poweredBy3')
+    expect(res).not.toBeNull()
+    expect(res.status).toBe(200)
+    expect(res.headers.get('X-Powered-By')).toBe('Foo')
+  })
 })

src/middleware/powered-by/index.ts

@@ -2,12 +2,15 @@
  * @module
  * Powered By Middleware for Hono.
  */
-
 import type { MiddlewareHandler } from '../../types'
 
-export const poweredBy = (): MiddlewareHandler => {
+type PoweredByOptions = {
+  serverName?: string
+}
+
+export const poweredBy = (options?: PoweredByOptions): MiddlewareHandler => {
   return async function poweredBy(c, next) {
     await next()
-    c.res.headers.set('X-Powered-By', 'Hono')
+    c.res.headers.set('X-Powered-By', options?.serverName ?? 'Hono')
   }
 }