iot-sol/node_modules/hope-base/lib/web.js

Intel(r) IoT Services Orchestration Layer - HTML5 IDE + Node.js middleware to create and host distributed IoT Apps in minutes

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/**
 * @module  base/web
 */

var _ = require("lodash");
var bodyParser = require("body-parser");
var express = require("express");
var io = require("socket.io");
var enableDestroy = require('server-destroy');


var check = require("./check").check;

/**
 * Create an express web app
 * @param  {Object} config in format of {
 *   port: ...
 *   static: [...] a list of directories to be served by this webapp as static
 *   web_socket: true/false: whether has a web socket enabled
 * }
 * @return {Object}        The web app created, it has a $destroy method,
 *                         a $$port property (in which port)
 *                         and a $$config property (stores the config)
 *                         and a $$server property for the server
 */
exports.create_web_app = function(config) {
  config = config || {};
  check(_.isNumber(config.port), "Should have port for the web app");
  var web_app = express();
  web_app.use(bodyParser.urlencoded({extended: true}));
  web_app.use(bodyParser.json());

  if (config.static) {
    var paths = _.isString(config.static) ? [config.static] : config.static;
    _.forEach(paths, function(path) {
      web_app.use(express.static(path));
    });
  }

  web_app.all("*", function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*"); // http://127.0.0.1:7000
    res.header("Access-Control-Allow-Headers", "origin, content-type, accept");
    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    next();
  });

  

  // Start the server
  var server = require("http").createServer(web_app); // http server
  server.listen(config.port);

  //enable server destroy
  enableDestroy(server);

  if (config.web_socket) {
    web_app.$web_socket = io(server);
  }

  web_app.$destroy = function() {
    server.destroy();
  };

  web_app.$$port = config.port;
  web_app.$$config = config;
  web_app.$$server = server;

  return web_app;
};

exports.$factories = {
  WebApp: exports.create_web_app
};