irrelon-reactor-autonet/es6/class/Server.js

A module for automatically creating groups of self-networking services.

import express from 'express';
import bodyParser from 'body-parser';
import freeport from 'freeport';

import EventEmitter from './EventEmitter';

class Server extends EventEmitter {
	constructor (name) {
		super(name);
		
		this._routes = {};

		this.app = express();

		// Enable JSON support
		this.app.use(bodyParser.json());

		// Enable url-encoding support
		this.app.use(bodyParser.urlencoded({extended: true}));

		// Enable pre-flight CORS
		this.app.use(function(req, res, next) {
			res.header('Access-Control-Allow-Origin', req.headers.origin);
			res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
			res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, x-irrelon-auth');

			// Intercept OPTIONS method
			if (req.method === 'OPTIONS') {
				res.sendStatus(200);
			} else {
				next();
			}
		});
	}

	start (host, port, callback) {
		var self = this;
		
		if (!port || port === 0 || port === '0' || port === undefined) {
			// Get a free port first
			freeport(function(err, availablePort) {
				if (err) {
					throw err;
				}
				
				self._start(availablePort, host, function (err, data) {
					if (!err) {
						//self.log('Listening at ' + host + ' on port ' + availablePort);
						callback(false, self.server.address());
					}
				});
			});
		} else {
			self._start(port, host, function () {
				self.log('Listening at ' + host + ' on port ' + port);
				callback(false);
			});
		}
	}
	
	_start (port, host, cb) {
		this.server = this.app.listen(port, host, cb);
	}

	staticRoute (path, filePath) {
		this.log('Service static files at ' + path + ' from ' + __dirname + filePath);
		this.app.use(path, express.static(__dirname + filePath));
	}
	
	optionsRoute (path, callback) {
		this._routes[path] = this._routes[path] || {
			methods: [],
			protocol: 'http://'
		};
		
		this._routes[path].methods.push('OPTIONS');
		this.app.options(path, callback);
	}
	
	headRoute (path, callback) {
		this._routes[path] = this._routes[path] || {
			methods: [],
			protocol: 'http://'
		};
		
		this._routes[path].methods.push('HEAD');
		this.app.head(path, callback);
	}
	
	getRoute (path, callback) {
		this._routes[path] = this._routes[path] || {
			methods: [],
			protocol: 'http://'
		};
		
		this._routes[path].methods.push('GET');
		this.app.get(path, callback);
	}
	
	putRoute (path, callback) {
		this._routes[path] = this._routes[path] || {
			methods: [],
			protocol: 'http://'
		};
		
		this._routes[path].methods.push('PUT');
		this.app.put(path, callback);
	}
	
	postRoute (path, callback) {
		this._routes[path] = this._routes[path] || {
			methods: [],
			protocol: 'http://'
		};
		
		this._routes[path].methods.push('POST');
		this.app.post(path, callback);
	}
	
	deleteRoute (path, callback) {
		this._routes[path] = this._routes[path] || {
			methods: [],
			protocol: 'http://'
		};
		
		this._routes[path].methods.push('DELETE');
		this.app.delete(path, callback);
	}
}

export default Server;