Deno KV

🥝.ts

import { serve } from "https://deno.land/std@0.177.0/http/server.ts";

const db = await Deno.openKv();

interface RouteHandler {
  [key: string]: (url: URL) => Promise<{ body: string; status?: number }>;
}

const template = `\n\rtry /reset or /set?value=[your value]`

const routes: RouteHandler = {
  "/": async () => {
    const pageViews = await db.get(["pageViews"]);
    await db.atomic().mutate({type: "sum", ["pageViews"], value: new Deno.KvU64(1n)}).commit();
    return { body: `Total views: ${pageViews.value + 1}` + template };
  },
  "/set": async (url: URL) => {
    const value = url.searchParams.get("value");
    if (value === null || /^\d+$/.test(value)) {
      await db.set(["pageViews"], value ? parseInt(value) : 0);
      return { body: `${value}` };
    }
    return { body: "NOT OK", status: 400 };
  },
  "/reset": async () => {
    await db.set(["pageViews"], 0);
    return { body: "OK" };
  },
  "*": async () => {
    return { body: "I'm a teapot", status: 418 };
  },
};

serve(async (req: Request) => {
  const url = new URL(req.url);
  const handler = routes[url.pathname] ?? routes["*"];
  const res = await handler(url);
  return new Response(res.body, { status: res.status ?? 200 });
});