const http = require("http");

const fs = require("fs");

const os = require("os");

const path = require("path");

const host = process.env.HOST || "0.0.0.0";

const port = Number(process.env.PORT) || 3000;

const publicDir = path.join(__dirname, "public");

const mimeTypes = {

".html": "text/html; charset=utf-8",

".css": "text/css; charset=utf-8",

".js": "application/javascript; charset=utf-8",

".json": "application/json; charset=utf-8",

".svg": "image/svg+xml",

".png": "image/png",

".ico": "image/x-icon"

};

function sendFile(res, filePath) {

fs.readFile(filePath, (error, content) => {

if (error) {

res.writeHead(500, { "Content-Type": "text/plain; charset=utf-8" });

res.end("Internal Server Error");

return;

}

const ext = path.extname(filePath).toLowerCase();

res.writeHead(200, {

"Content-Type": mimeTypes[ext] || "application/octet-stream; charset=utf-8"

});

res.end(content);

});

}

function getLanUrls() {

const networkInterfaces = os.networkInterfaces();

const urls = [];

Object.values(networkInterfaces).forEach((addresses) => {

(addresses || []).forEach((address) => {

if (address.family === "IPv4" && !address.internal) {

urls.push(`http://${address.address}:${port}`);

}

});

});

return urls;

}

const server = http.createServer((req, res) => {

const urlPath = req.url === "/" ? "/index.html" : req.url;

const safePath = path.normalize(urlPath).replace(/^(\.\.[/\\])+/, "");

const filePath = path.join(publicDir, safePath);

if (!filePath.startsWith(publicDir)) {

res.writeHead(403, { "Content-Type": "text/plain; charset=utf-8" });

res.end("Forbidden");

return;

}

fs.stat(filePath, (error, stats) => {

if (error || !stats.isFile()) {

res.writeHead(404, { "Content-Type": "text/plain; charset=utf-8" });

res.end("Not Found");

return;

}

sendFile(res, filePath);

});

});

server.listen(port, host, () => {

console.log("LocalTools running at:");

console.log(`- Local: http://127.0.0.1:${port}`);

getLanUrls().forEach((url) => {

console.log(`- Network: ${url}`);

});

});