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app.js
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app.js
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/**
* Copyright 2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
"use strict"; /* always for Node.JS, never global in the browser */
// Set the modules
var http = require('http'),
path = require("path"),
express = require("express"),
RED = require("node-red");
// Create an Express app
var app = express();
var cfenv = require("cfenv");
var appEnv = cfenv.getAppEnv();
var VCAP_APPLICATION = JSON.parse(process.env.VCAP_APPLICATION);
// Add a simple route for static content served from './public'
//app.use( "/", express.static("public") );
app.get('/', function(req, res) {
res.redirect('/red');
});
app.get('/credentials', function(req,res) {
if (process.env.VCAP_SERVICES) {
res.setHeader('Content-Type', 'application/json');
res.send(process.env.VCAP_SERVICES);
}
});
// Create a server
var httpServer = http.createServer(app);
var port = process.env.VCAP_APP_PORT || 8080;
// Use application-level middleware for common functionality
app.use(require('morgan')('combined'));
app.use(require('cookie-parser')());
app.use(require('body-parser').urlencoded({ extended: true }));
app.use(require('express-session')({ secret: 'keyboard cat', resave: true, saveUninitialized: true }));
// Set up the client for sending data to Node-RED
var Client = require('node-rest-client').Client;
var client = new Client();
/*
* Begin set-up for the Node-RED directory. There are a few key differences between a vanilla install of Node-RED
* and embedding Node-RED in an Express app. The settings variable has similar details to bluemix-settings.js.
*/
var settings = {
httpAdminRoot:"/red",
httpNodeRoot: "/",
mqttReconnectTime: 4000,
serialReconnectTime: 4000,
debugMaxLength: 1000,
// Basic flow protection, password is password using bcrypt algorithim
/*adminAuth: {
type: "credentials",
users: [{
username: "admin",
password: "$2a$08$zZWtXTja0fB1pzD4sHCMyOCMYz2Z6dNbM6tl8sJogENOMcxWV9DN.",
permissions: "*"
}]
},*/
// Add the bluemix-specific nodes in
nodesDir: path.join(__dirname,"nodes"),
// Blacklist the non-bluemix friendly nodes
nodesExcludes:['66-mongodb.js','75-exec.js','35-arduino.js','36-rpi-gpio.js','25-serial.js','28-tail.js','50-file.js','31-tcpin.js','32-udp.js','23-watch.js'],
// Enable module reinstalls on start-up; this ensures modules installed
// post-deploy are restored after a restage
autoInstallModules: true,
functionGlobalContext: { // enables and pre-populates the context.global variable
},
storageModule: require("./couchstorage")
};
// Not used in embedded mode: uiHost, uiPort, httpAdminAuth, httpNodeAuth, httpStatic, httpStaticAuth, https
// Check to see if Cloudant service exists
settings.couchAppname = VCAP_APPLICATION['application_name'];
if (process.env.VCAP_SERVICES) {
// Running on Bluemix. Parse the port and host that we've been assigned.
var env = JSON.parse(process.env.VCAP_SERVICES);
console.log('VCAP_SERVICES: %s', process.env.VCAP_SERVICES);
// Also parse Cloudant settings.
var couchService = env['cloudantNoSQLDB'][0]['credentials'];
}
if (!couchService) {
console.log("Failed to find Cloudant service");
if (process.env.NODE_RED_STORAGE_NAME) {
console.log(" - using NODE_RED_STORAGE_NAME environment variable: "+process.env.NODE_RED_STORAGE_NAME);
}
throw new Error("No cloudant service found");
}
settings.couchUrl = couchService.url;
// Initialise the runtime with a server and settings
RED.init( httpServer, settings );
// Serve the editor UI from /red
app.use( settings.httpAdminRoot, RED.httpAdmin );
// Serve the http nodes UI from /api
app.use( settings.httpNodeRoot, RED.httpNode );
httpServer.listen( port, function(){
console.log('App listening on port: ', port);
});
// Start the runtime
RED.start();