add express demo

README.md

@@ -38,6 +38,9 @@
 
 5. [HTML5 进阶系列：文件上传下载](https://github.com/lin-xin/blog/issues/19)
 
+## [Node.js](https://github.com/lin-xin/blog/issues?utf8=%E2%9C%93&q=node)
+1. [Node.js 入门：Express + Mongoose 基础使用](https://github.com/lin-xin/blog/issues/21)
+
 ## [微信小程序](https://github.com/lin-xin/blog/issues?utf8=%E2%9C%93&q=wxapp)
 1. [微信小程序之购物车功能](https://github.com/lin-xin/blog/issues/14)
 

express-demo/app.js

@@ -0,0 +1,47 @@
+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 ejs = require('ejs');
+var index = require('./routes/index');
+var users = require('./routes/users');
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.engine('html', ejs.__express);
+app.set('view engine', 'html');
+
+// 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(express.static(path.join(__dirname, 'public')));
+
+app.use('/', index);
+app.use('/users', users);
+
+// 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;

express-demo/bin/www

@@ -0,0 +1,90 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('express-demo: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);
+}

express-demo/models/userModel.js

@@ -0,0 +1,12 @@
+var mongoose = require('mongoose');
+mongoose.Promise = global.Promise;
+mongoose.connect('mongodb://localhost:27017/userdb', {useMongoClient: true});
+
+var userSchema = new mongoose.Schema({
+    username: String,
+    email: String
+})
+
+var model = mongoose.model('user', userSchema);
+
+module.exports = model;

express-demo/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "express-demo",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "body-parser": "~1.17.1",
+    "cookie-parser": "~1.4.3",
+    "debug": "~2.6.3",
+    "ejs": "^2.5.6",
+    "express": "~4.15.2",
+    "jade": "~1.11.0",
+    "mongoose": "^4.11.4",
+    "morgan": "~1.8.1",
+    "serve-favicon": "~2.4.2"
+  }
+}