Revise paste fileserver

import { readdir } from "node:fs/promises";
import { join } from "node:path";

const FILES_DIR = "./files";

Bun.serve({
  port: 3006,
  async fetch(req) {
    const url = new URL(req.url);

// Kui küsitakse juurkausta, näita failide loetelu
    if (url.pathname === "/") {
      try {
        const files = await readdir(FILES_DIR);

if (files.length === 0) {
          html += "<li>Kausta ei ole ühtegi faili</li>";
        } else {
          for (const file of files) {
            html += `<li>📄 <a href="/download/${encodeURIComponent(file)}">${file}</a></li>`;
          }
        }

html += `
            </ul>
          </body>
          </html>
        `;

return new Response(html, {
          headers: { "Content-Type": "text/html; charset=utf-8" }
        });
      } catch (error) {
        return new Response("Viga failide lugemisel", { status: 500 });
      }
    }

// Kui küsitakse faili allalaadimist
    if (url.pathname.startsWith("/download/")) {
      const filename = decodeURIComponent(url.pathname.slice(10));
      const filepath = join(FILES_DIR, filename);

try {
        const file = Bun.file(filepath);
        const exists = await file.exists();

if (!exists) {
          return new Response("Faili ei leitud", { status: 404 });
        }

return new Response(file, {
          headers: {
            "Content-Disposition": `attachment; filename="${filename}"`,
          }
        });
      } catch (error) {
        return new Response("Viga faili lugemisel", { status: 500 });
      }
    }

return new Response("Lehte ei leitud", { status: 404 });
  },
});

console.log("Failiserver töötab aadressil http://localhost:3006");