fix: loading static files

[houssems]

Hi,

I'm working in Angular 19 SSR integration with Hono. While investigating a server crash on the loading of static files, I discovered that it didn't wait for the res object to get resolved. So status attribute doesn't exist in Res object. The issue is from instanceof Promise.

RangeError [ERR_HTTP_INVALID_STATUS_CODE]: Invalid status code: undefined at ServerResponse.writeHead (node:_http_server:351:11) at Hn (/dist/server/server.mjs:89:11) at Server.<anonymous> (/dist/server/server.mjs:91:554) at Server.emit (node:events:519:28) at parserOnIncoming (node:_http_server:1141:12) at HTTPParser.parserOnHeadersComplete (node:_http_common:118:17) { code: 'ERR_HTTP_INVALID_STATUS_CODE' }

[houssems]

@yusukebe Would you please review this?

[usualoma]

Hi @houssems. Thank you for creating a pull request!

Should we accept thenable?

When the following code was executed in Deno and "wrangler," a message was displayed. Bun caused an error.

import { Hono } from 'hono'

const app = new Hono()

app.get('/', () => {
  const res = {
    then(resolve) {
      setTimeout(() => {
        resolve(new Response('Hello from thenable!'))
      }, 1000);
    }
  }
  return res as Promise<Response>
})

export default app

As the type indicates, Hono is originally expecting an instance of "Promise", but I think it's okay to accept a thenable even if it's not an instance of "Promise".

res != null

Since it has already been guaranteed that res is not null or undefined using the following code before this point, I would like to omit res != null and prioritize performance.

https://github.com/honojs/node-server/blob/99ad1703fd3aa60853fbdfab880271ac88343016/src/listener.ts#L205