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const http = require('http');
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const url = require('url');
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const fs = require('fs');
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const path = require('path');
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// you can pass the parameter in the command line. e.g. node static_server.js 3000
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const port = process.argv[3] || 9000;
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const hostname = process.argv[2] || 'localhost';
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// maps file extention to MIME types
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const mimeType = {
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'.ico': 'image/x-icon',
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'.html': 'text/html',
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'.js': 'text/javascript',
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'.json': 'application/json',
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'.css': 'text/css',
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'.png': 'image/png',
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'.jpg': 'image/jpeg',
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'.wav': 'audio/wav',
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'.mp3': 'audio/mpeg',
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'.svg': 'image/svg+xml',
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'.pdf': 'application/pdf',
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'.doc': 'application/msword',
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'.eot': 'appliaction/vnd.ms-fontobject',
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'.ttf': 'aplication/font-sfnt',
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};
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http
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.createServer((req, res) => {
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// console.log(`${req.method} ${req.url}`);
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// parse URL
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const parsedUrl = url.parse(req.url);
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// extract URL path
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// Avoid https://en.wikipedia.org/wiki/Directory_traversal_attack
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// e.g curl --path-as-is http://localhost:9000/../fileInDanger.txt
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// by limiting the path to current directory only
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const sanitizePath = path
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.normalize(parsedUrl.pathname)
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.replace(/^(\.\.[/\\])+/, '');
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let pathname = path.join(__dirname, sanitizePath);
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fs.exists(pathname, exist => {
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if (!exist) {
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// if the file is not found, return 404
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res.statusCode = 404;
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res.end(`File ${pathname} not found!`);
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return;
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}
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// if is a directory, then look for index.html
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if (fs.statSync(pathname).isDirectory()) {
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pathname += '/index.html';
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}
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// read file from file system
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fs.readFile(pathname, (err, data) => {
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if (err) {
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res.statusCode = 500;
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res.end(`Error getting the file: ${err}.`);
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} else {
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// based on the URL path, extract the file extention. e.g. .js, .doc, ...
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const { ext } = path.parse(pathname);
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// if the file is found, set Content-type and send data
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res.setHeader('Content-type', mimeType[ext] || 'text/plain');
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res.end(data);
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}
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});
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});
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})
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.listen(parseInt(port, 10), hostname);
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// eslint-disable-next-line
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console.log(`metrics running on http://${hostname}:${port}/metrics.html`);
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