Add Cache Response using Web Cache API

[kresnasatya]

I see a neighbour of NodeJS, Deno has implement Cache Response using Web Cache API. I think if NodeJS can catch up this it will be great.

Background

I create web app that utilize Cache Response using SvelteKit & Cloudflare Pages (functions). The reason I choose Cloudflare because SvelteKit and Cloudflare Pages communicate using Web API standards which is makes more easier to implement a Cache Response.

Btw, I'm almost keep it in two repositories and replace the Worker (plain) with Hono because it supports Cache Middleware. But, I think it makes more complicated if I do this way.

Also, the Cache Middleware of Hono framework currently support in Cloudflare and Deno.

Syntax

The GET function comes from SvelteKit but the caches comes from Cloudflare.

import { allTags } from '$lib/github';

export async function GET({ request, url }) {
    const isCloudflare = typeof caches !== 'undefined';
    
    if (isCloudflare) {
        const cacheKey = new Request(url.toString(), request);
        const cache = caches.default;
        let response = await cache.match(cacheKey);
        if (response) return response;
    }

    let json = await allTags('laravel/laravel');

    let response = new Response(JSON.stringify(json));

    response.headers.set('Cache-Control', 'public, max-age=3600');
    response.headers.set('Content-Type', 'application/json');
    response.headers.set('Access-Control-Allow-Origin', '*');
    response.headers.set('Access-Control-Allow-Methods', 'GET');

    // Put the response in the cache
    if (isCloudflare) {
        const cache = caches.default;
        const cacheKey = new Request(url.toString(), request);
        cache.put(cacheKey, response.clone());
    }

    return response;
}