Created
July 6, 2023 19:22
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No-dependency HTTP Server in node.js
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| import fs from "node:fs"; | |
| import http from "node:http"; | |
| import path from "node:path"; | |
| import process from "node:process"; | |
| const PORT = 8000; | |
| const STATIC_PATH = path.join(process.cwd(), "./static"); | |
| const NOT_FOUND_HTML_PATH = path.join(STATIC_PATH, "./404.html"); | |
| const MIDDLEWARE_HANDLER = async (req, res) => { | |
| const filePath = (url.endsWith("/") ? [STATIC_PATH, url, "index.html"] : [STATIC_PATH, url]).join(''); | |
| const statusCode = await fileExists(filePath) ? 200 : 404; | |
| console.log(`${req.method} ${req.url} ${statusCode}`); | |
| }; | |
| const NOT_FOUND_HTML_HANDLER = async (req, res) => { | |
| res.writeHead(404, { | |
| "Content-Type": MIME_TYPES.html | |
| }); | |
| fs.createReadStream(NOT_FOUND_HTML_PATH).pipe(res); | |
| }; | |
| const MIME_TYPES = { | |
| default: "application/octet-stream", | |
| html: "text/html; charset=UTF-8", | |
| js: "application/javascript", | |
| css: "text/css", | |
| png: "image/png", | |
| jpg: "image/jpg", | |
| gif: "image/gif", | |
| ico: "image/x-icon", | |
| svg: "image/svg+xml", | |
| }; | |
| async function fileExists(pathString) { | |
| return await fs.promises.access(pathString).then(() => true, () => false) | |
| } | |
| function createHTTPServer(port, handler) { | |
| return new Promise((resolve, reject) => { | |
| let server = http.createServer(handler) | |
| .once('error', reject) | |
| .on('listening', () => resolve(server)) | |
| .listen(port); | |
| }); | |
| } | |
| await createHTTPServer(PORT, async ({ url, headers, method }, res) => { | |
| const filePath = (url.endsWith("/") ? [STATIC_PATH, url, "index.html"] : [STATIC_PATH, url]).join(''); | |
| const statusCode = await fileExists(filePath) ? 200 : 404; | |
| const contentType = | |
| headers.accept?.includes('text/html') | |
| ? MIME_TYPES.html | |
| : MIME_TYPES[path.extname(filePath).substring(1).toLowerCase()] || MIME_TYPES.default; | |
| res.writeHead(statusCode, { "Content-Type": contentType }); | |
| fs.createReadStream(statusCode === 200 ? filePath : NOT_FOUND_HTML_PATH) | |
| .pipe(res); | |
| console.log(`${method} ${url} ${statusCode}`); | |
| }); | |
| console.log(`Server running at http://127.0.0.1:${PORT}/`); |
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