ヘッダーをコンソールに記録する

export default {
	async fetch(request) {
		console.log(new Map(request.headers));
		return new Response("Hello world");
	},
};

export default {
	async fetch(request): Promise<Response> {
		console.log(new Map(request.headers));
		return new Response("Hello world");
	},
} satisfies ExportedHandler;

from workers import WorkerEntrypoint, Response

class Default(WorkerEntrypoint):
    async def fetch(self, request):
        print(dict(request.headers))
        return Response('Hello world')

use worker::*;

#[event(fetch)]
async fn fetch(req: HttpRequest, _env: Env, _ctx: Context) -> Result<Response> {
    console_log!("{:?}", req.headers());
    Response::ok("hello world")
}

import { Hono } from 'hono';

const app = new Hono();

app.get('*', (c) => {
  // Different ways to log headers in Hono:

  // 1. Using Map to display headers in console
  console.log('Headers as Map:', new Map(c.req.raw.headers));

  // 2. Using spread operator to log headers
  console.log('Headers spread:', [...c.req.raw.headers]);

  // 3. Using Object.fromEntries to convert to an object
  console.log('Headers as Object:', Object.fromEntries(c.req.raw.headers));

  // 4. Hono's built-in header accessor (for individual headers)
  console.log('User-Agent:', c.req.header('User-Agent'));

  // 5. Using c.req.headers to get all headers
  console.log('All headers from Hono context:', c.req.header());

  return c.text('Hello world');
});

export default app;