add example express4

examples/express4/app.js

@@ -0,0 +1,22 @@
+var express = require('express');
+var logger = require('morgan');
+var flash = require('connect-flash');
+var session = require('express-session');
+
+var routes = require('./routes/index.js');
+
+var app = express();
+
+app.use(logger('dev'));
+app.use(session({
+    secret: 'secret',
+    resave: false,
+    saveUninitialized: false
+}));
+app.use(flash());
+
+app.use('/', routes);
+
+app.listen(3000, function(req, res, next) {
+    console.log('App Started on Port 3000');
+});

examples/express4/package.json

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+{
+  "name": "flash",
+  "version": "1.0.0",
+  "description": "",
+  "main": "app.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "connect-flash": "^0.1.1",
+    "express": "^4.13.3",
+    "express-session": "^1.12.1",
+    "morgan": "^1.6.1"
+  }
+}

examples/express4/routes/index.js

@@ -0,0 +1,16 @@
+var express = require('express');
+var router = express.Router();
+
+router.route('/')
+.get(function(req, res, next) {
+    req.flash('flash', 'test flash!');
+    res.redirect(303, '/flash');
+});
+
+router.route('/flash')
+.get(function(req, res, next) {
+    console.log(req.flash('flash'));
+    res.send('ok');
+});
+
+module.exports = router;