64 lines
1.6 KiB
JavaScript
64 lines
1.6 KiB
JavaScript
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'use strict';
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// Imports
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const fs = require('fs');
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const http = require('http');
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const path = require('path');
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const { BASE_URL, DIST_DIR, PORT } = require('./constants');
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// Constants
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const CONTENT_TYPES = {
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'.css': 'text/css',
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'.html': 'text/html',
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'.ico': 'image/x-icon',
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'.jpg': 'image/jpeg',
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'.js': 'text/javascript',
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'.json': 'application/json',
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'.png': 'image/png',
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'.svg': 'image/svg+xml'
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};
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const CACHE = {};
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const VERBOSE = process.argv.includes('--verbose');
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// Helpers
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const urlToFile = url => path.join(DIST_DIR, url);
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const getFile = filePath => new Promise((resolve, reject) => CACHE.hasOwnProperty(filePath) ?
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resolve(CACHE[filePath]) :
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fs.readFile(filePath, 'utf-8', (err, content) => err ? reject(err) : resolve(CACHE[filePath] = content)));
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const middleware = (req, res) => {
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const method = req.method;
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let url = req.url;
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if (VERBOSE) console.log(`Request: ${method} ${url}`);
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if (method !== 'GET') return;
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if (url.endsWith('/')) url += 'index';
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if (!url.includes('.')) url += '.html';
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let filePath = urlToFile(url);
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if (!fs.existsSync(filePath)) filePath = urlToFile('index.html');
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getFile(filePath).
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then(content => {
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const contentType = CONTENT_TYPES[path.extname(filePath)] || 'application/octet-stream';
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res.setHeader('Content-Type', contentType);
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res.end(content);
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}).
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catch(err => {
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console.error(err);
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res.statusCode = 500;
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res.end(http.STATUS_CODES[500]);
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});
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};
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// Run
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const server = http.
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createServer(middleware).
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on('error', err => console.error(err)).
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on('listening', () => console.log(`Server listening at ${BASE_URL}.`)).
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listen(PORT);
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