mirror of https://github.com/Lissy93/dashy.git
101 lines
4.0 KiB
JavaScript
101 lines
4.0 KiB
JavaScript
/**
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* Note: The app must first be built (yarn build) before this script is run
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* This is the main entry point for the application, a simple server that
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* runs some checks, and then serves up the app from the ./dist directory
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* Also includes some routes for status checks/ ping and config saving
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* */
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/* Import built-in Node server modules */
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const http = require('http');
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const path = require('path');
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const util = require('util');
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const dns = require('dns');
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const os = require('os');
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/* Import Express + middleware functions */
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const express = require('express');
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const history = require('connect-history-api-fallback');
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/* Kick of some basic checks */
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require('./services/update-checker'); // Checks if there are any updates available, prints message
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require('./services/config-validator'); // Include and kicks off the config file validation script
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/* Include route handlers for API endpoints */
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const statusCheck = require('./services/status-check'); // Used by the status check feature, uses GET
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const saveConfig = require('./services/save-config'); // Saves users new conf.yml to file-system
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const rebuild = require('./services/rebuild-app'); // A script to programmatically trigger a build
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const sslServer = require('./services/ssl-server');
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/* Helper functions, and default config */
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const printMessage = require('./services/print-message'); // Function to print welcome msg on start
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const ENDPOINTS = require('./src/utils/defaults').serviceEndpoints; // API endpoint URL paths
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/* Checks if app is running within a container, from env var */
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const isDocker = !!process.env.IS_DOCKER;
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/* Checks env var for port. If undefined, will use Port 80 for Docker, or 4000 for metal */
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const port = process.env.PORT || (isDocker ? 80 : 4000);
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/* Attempts to get the users local IP, used as part of welcome message */
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const getLocalIp = () => {
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const dnsLookup = util.promisify(dns.lookup);
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return dnsLookup(os.hostname());
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};
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/* Gets the users local IP and port, then calls to print welcome message */
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const printWelcomeMessage = () => {
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getLocalIp().then(({ address }) => {
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const ip = address || 'localhost';
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console.log(printMessage(ip, port, isDocker)); // eslint-disable-line no-console
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});
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};
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/* Just console.warns an error */
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const printWarning = (msg, error) => {
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console.warn(`\x1b[103m\x1b[34m${msg}\x1b[0m\n`, error || ''); // eslint-disable-line no-console
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};
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/* A middleware function for Connect, that filters requests based on method type */
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const method = (m, mw) => (req, res, next) => (req.method === m ? mw(req, res, next) : next());
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const app = express()
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// Serves up static files
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.use(express.static(path.join(__dirname, 'dist')))
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.use(express.static(path.join(__dirname, 'public'), { index: 'initialization.html' }))
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// Load middlewares for parsing JSON, and supporting HTML5 history routing
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.use(express.json())
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.use(history())
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// GET endpoint to run status of a given URL with GET request
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.use(ENDPOINTS.statusCheck, (req, res) => {
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try {
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statusCheck(req.url, async (results) => {
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await res.end(results);
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});
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} catch (e) {
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printWarning(`Error running status check for ${req.url}\n`, e);
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}
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})
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// POST Endpoint used to save config, by writing conf.yml to disk
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.use(ENDPOINTS.save, method('POST', (req, res) => {
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try {
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saveConfig(req.body, (results) => { res.end(results); });
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} catch (e) {
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printWarning('Error writing config file to disk', e);
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res.end(JSON.stringify({ success: false, message: e }));
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}
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}))
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// GET endpoint to trigger a build, and respond with success status and output
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.use(ENDPOINTS.rebuild, (req, res) => {
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rebuild().then((response) => {
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res.end(JSON.stringify(response));
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}).catch((response) => {
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res.end(JSON.stringify(response));
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});
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});
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/* Create HTTP server from app on port, and print welcome message */
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http.createServer(app).listen(port, () => { printWelcomeMessage(); });
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/* Check, and if possible start SSL server too */
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sslServer(app);
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