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server.js
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#!/bin/env node
// OpenShift sample Node application
var express = require('express');
var fs = require('fs');
// Doing this the non-mongojs way
var mongodb = require('mongodb');
/*
// Depends on mongojs lib being added to 'package.json' so make sure you run:
// npm install -S mongojs
var mongojs = require('mongojs');
var connection_string = process.env.OPENSHIFT_APP_NAME || 'node';
if(process.env.OPENSHIFT_MONGODB_DB_PASSWORD){
connection_string = process.env.OPENSHIFT_MONGODB_DB_USERNAME + ":" +
process.env.OPENSHIFT_MONGODB_DB_PASSWORD + "@" +
process.env.OPENSHIFT_MONGODB_DB_HOST + '/' +
process.env.OPENSHIFT_APP_NAME;
}
var db = mongojs(connection_string, ['resume']);
*/
/**
* Define the sample application.
*/
var SampleApp = function() {
// Scope.
var self = this;
// Setup
self.dbServer = new mongodb.Server(process.env.OPENSHIFT_MONGODB_DB_HOST, parseInt(process.env.OPENSHIFT_MONGODB_DB_PORT));
self.db = new mongodb.Db(process.env.OPENSHIFT_APP_NAME, self.dbServer, {auto_reconnect: true});
self.dbUser = process.env.OPENSHIFT_MONGODB_DB_USERNAME;
self.dbPass = process.env.OPENSHIFT_MONGODB_DB_PASSWORD;
self.ipaddr = process.env.OPENSHIFT_INTERNAL_IP;
self.port = parseInt(process.env.OPENSHIFT_INTERNAL_PORT) || 8080;
if (typeof self.ipaddr === "undefined") {
console.warn('No OPENSHIFT_INTERNAL_IP environment variable');
};
/* ================================================================ */
/* Helper functions. */
/* ================================================================ */
/**
* Set up server IP address and port # using env variables/defaults.
*/
self.setupVariables = function() {
// Set the environment variables we need.
self.ipaddress = process.env.OPENSHIFT_INTERNAL_IP;
self.port = process.env.OPENSHIFT_INTERNAL_PORT || 8080;
if (typeof self.ipaddress === "undefined") {
// Log errors on OpenShift but continue w/ 127.0.0.1 - this
// allows us to run/test the app locally.
console.warn('No OPENSHIFT_INTERNAL_IP var, using 127.0.0.1');
self.ipaddress = "127.0.0.1";
};
};
/**
* Populate the cache.
*/
self.populateCache = function() {
if (typeof self.zcache === "undefined") {
self.zcache = { 'index.html': '' };
}
// Local cache for static content.
self.zcache['index.html'] = fs.readFileSync('./index.html');
};
/**
* Retrieve entry (content) from cache.
* @param {string} key Key identifying content to retrieve from cache.
*/
self.cache_get = function(key) { return self.zcache[key]; };
/**
* terminator === the termination handler
* Terminate server on receipt of the specified signal.
* @param {string} sig Signal to terminate on.
*/
self.terminator = function(sig){
if (typeof sig === "string") {
console.log('%s: Received %s - terminating sample app ...',
Date(Date.now()), sig);
process.exit(1);
}
console.log('%s: Node server stopped.', Date(Date.now()) );
};
/**
* Setup termination handlers (for exit and a list of signals).
*/
self.setupTerminationHandlers = function(){
// Process on exit and signals.
process.on('exit', function() { self.terminator(); });
// Removed 'SIGPIPE' from the list - bugz 852598.
['SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGILL', 'SIGTRAP', 'SIGABRT',
'SIGBUS', 'SIGFPE', 'SIGUSR1', 'SIGSEGV', 'SIGUSR2', 'SIGTERM'
].forEach(function(element, index, array) {
process.on(element, function() { self.terminator(element); });
});
};
/* ================================================================ */
/* App server functions (main app logic here). */
/* ================================================================ */
/**
* Create the routing table entries + handlers for the application.
*/
self.createRoutes = function() {
self.routes = { };
// Routes for /health, /asciimo and /
self.routes['/health'] = function(req, res) {
res.send('1');
};
// Kinda funny, Openshift added this out of the box
self.routes['/asciimo'] = function(req, res) {
var link = "http://i.imgur.com/kmbjB.png";
res.send("<html><body><img src='" + link + "'></body></html>");
};
self.routes['/'] = function(req, res) {
res.setHeader('Content-Type', 'text/html');
res.send(self.cache_get('index.html') );
};
self.routes['/resume'] = function(req, res){
self.db.collection('resume').find().toArray(function(err, names) {
res.header("Content-Type:","text/json");
res.end(JSON.stringify(names));
});
};
};
/**
* Initialize the server (express) and create the routes and register
* the handlers.
*/
self.initializeServer = function() {
self.createRoutes();
self.app = express.createServer();
// serve static assets
self.app.use(express.static(__dirname));
// Add handlers for the app (from the routes).
for (var r in self.routes) {
self.app.get(r, self.routes[r]);
}
};
// Logic to open a database connection. We are going to call this outside of app so it is available to all our functions inside.
self.connectDb = function(callback){
self.db.open(function(err, db){
if(err){ throw err };
self.db.authenticate(self.dbUser, self.dbPass, {authdb: "admin"}, function(err, res){
if(err){ throw err };
callback();
});
});
};
/**
* Initializes the sample application.
*/
self.initialize = function() {
self.setupVariables();
self.populateCache();
self.setupTerminationHandlers();
// Create the express server and routes.
self.initializeServer();
};
/**
* Start the server (starts up the sample application).
*/
self.start = function() {
// Start the app on the specific interface (and port).
self.app.listen(self.port, self.ipaddress, function() {
console.log('%s: Node server started on %s:%d ...',
Date(Date.now() ), self.ipaddress, self.port);
});
};
}; /* Sample Application. */
/**
* main(): Main code.
*/
var zapp = new SampleApp();
zapp.initialize();
zapp.start();