initial setup

Author: Allen Wang

Diff for: .gitignore

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+app/node_modules/*

Diff for: README.md

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+redis-sentinel-poc
+=====
+This repo is for server failover test using redis sentinel with nodejs

Diff for: app/Dockerfile

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+FROM node:alpine
+RUN mkdir -p /usr/src/app
+COPY . /usr/src/app
+WORKDIR /usr/src/app
+EXPOSE 3000
+CMD [ "npm", "start" ]

Diff for: app/app.js

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+var express = require('express');
+var path = require('path');
+var favicon = require('serve-favicon');
+var logger = require('morgan');
+var cookieParser = require('cookie-parser');
+var bodyParser = require('body-parser');
+
+var redis = require('redis');
+// var client = redis.createClient();
+
+var session = require('express-session');
+var RedisStore = require('connect-redis')(session);
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+
+// uncomment after placing your favicon in /public
+//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
+//app.use(logger('dev'));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(cookieParser());
+
+app.use(session({
+  store: new RedisStore({
+    host: 'redis',
+    port: 6379,
+    // client: client,
+    ttl: 260
+  }),
+  secret: 'password',
+  resave: false,
+  saveUninitialized: true,
+}));
+
+// app.use(session({
+//   secret: 'keyboard cat',
+//   resave: false,
+//   saveUninitialized: true,
+// }));
+
+app.use(express.static(path.join(__dirname, 'public')));
+
+
+app.get('/', function(req, res, next) {
+  res.redirect('/main');
+});
+
+app.get('/main', function(req, res, next) {
+  if (!req.session.login) return res.redirect('/login');
+  next();
+}, function(req, res, next) {
+  res.render('index', { title: 'Server1' });
+});
+
+app.get('/login', function(req, res, next) {
+  res.render('login');
+});
+
+app.post('/login', function(req, res, next) {
+  req.session.login = true;
+  res.redirect('/main');
+});
+
+app.get('/logout', function(req, res, next) {
+  delete req.session.login;
+  res.redirect('/login');
+});
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error('Not Found');
+  err.status = 404;
+  next(err);
+});
+
+// error handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+module.exports = app;

Diff for: app/bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('test:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

Diff for: app/package.json

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+{
+  "name": "test",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "body-parser": "~1.18.2",
+    "connect-redis": "^3.3.2",
+    "cookie-parser": "~1.4.3",
+    "debug": "~2.6.9",
+    "express": "~4.15.5",
+    "express-session": "^1.15.6",
+    "jade": "~1.11.0",
+    "morgan": "~1.9.0",
+    "redis": "^2.8.0",
+    "serve-favicon": "~2.4.5"
+  }
+}

Diff for: app/public/stylesheets/style.css

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+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}

Diff for: app/views/error.jade

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+extends layout
+
+block content
+  h1= message
+  h2= error.status
+  pre #{error.stack}

Diff for: app/views/index.jade

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+extends layout
+
+block content
+  h1= title
+  p Welcome to #{title}
+
+  form(action="/logout", method="get")
+    input(type="submit",value="logout")

Diff for: app/views/layout.jade

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+doctype html
+html
+  head
+    title= title
+    link(rel='stylesheet', href='/stylesheets/style.css')
+  body
+    block content

Diff for: app/views/login.jade

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+extends layout
+
+block content
+  h1 Please login first
+  form(action="/login", method="post")
+    input(name="username", placeholder="username")
+    br
+    input(type="password",name="username", placeholder="password")
+    br
+    input(type="submit",value="submit")
+
+