server.mjs

import http from "http";
import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const PORT = Number(process.env.PORT) || 3000;

const MIME = {
  ".html": "text/html; charset=utf-8",
  ".css": "text/css; charset=utf-8",
  ".js": "text/javascript; charset=utf-8",
  ".mjs": "text/javascript; charset=utf-8",
  ".json": "application/json",
  ".png": "image/png",
  ".jpg": "image/jpeg",
  ".jpeg": "image/jpeg",
  ".ico": "image/x-icon",
  ".svg": "image/svg+xml",
};

function safePath(urlPath) {
  const decoded = decodeURIComponent(urlPath.split("?")[0]);
  const rel = decoded === "/" ? "/index.html" : decoded;
  const resolved = path.normalize(path.join(__dirname, rel));
  if (!resolved.startsWith(__dirname)) return null;
  return resolved;
}

function requestHandler(req, res) {
  const filePath = safePath(req.url ?? "/");
  if (!filePath) {
    res.writeHead(403);
    res.end("Forbidden");
    return;
  }

  fs.readFile(filePath, (err, data) => {
    if (err) {
      res.writeHead(err.code === "ENOENT" ? 404 : 500);
      res.end(err.code === "ENOENT" ? "Not found" : "Server error");
      return;
    }
    const ext = path.extname(filePath).toLowerCase();
    res.writeHead(200, { "Content-Type": MIME[ext] ?? "application/octet-stream" });
    res.end(data);
  });
}

function start(port) {
  const server = http.createServer(requestHandler);
  server.on("error", (err) => {
    if (err.code === "EADDRINUSE" && port < 3010) {
      start(port + 1);
      return;
    }
    console.error(err.message);
    process.exit(1);
  });
  server.listen(port, () => {
    console.log(`Base0km çalışıyor: http://localhost:${port}`);
    console.log("Durdurmak için Ctrl+C");
  });
}

start(PORT);