Deno content server by reading local files using fetch

deno_content_server_fetch.ts

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

const BASE_PATH = "file:///var/tmp/testdata";

const reqHandler = async (req: Request) => {
  const p = new URL(req.url).pathname;
  const filePath = BASE_PATH + p;
  try {
    const res = await fetch(filePath);
    return new Response(res.body);
  } catch (e) {
    if (e instanceof TypeError) {
      return new Response(null, { status: 404 });
    }
  }
  return new Response(null, { status: 500 });
};

serve(reqHandler, { port: 8080 });