Added RESTful API example.

Author: sayar

12_AdvancedRESTAPI/app.js

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var http = require('http');
+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 routes = require('./routes/index');
+var api = require('./routes/api');
+
+var app = express();
+
+// 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('/', routes);
+app.use('/api', api);
+
+// 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 handlers
+
+// development error handler
+// will print stacktrace
+if (app.get('env') === 'development') {
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+      message: err.message,
+      error: err
+    });
+  });
+}
+
+// production error handler
+// no stacktraces leaked to user
+app.use(function(err, req, res, next) {
+  res.status(err.status || 500);
+  res.render('error', {
+    message: err.message,
+    error: {}
+  });
+});
+
+/**
+ * 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;
+  console.log('Listening on ' + bind);
+}

12_AdvancedRESTAPI/package.json

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+{
+  "name": "12_AdvancedRESTAPI",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./app.js"
+  },
+  "dependencies": {
+    "body-parser": "~1.13.2",
+    "cookie-parser": "~1.3.5",
+    "debug": "~2.2.0",
+    "express": "~4.13.1",
+    "jade": "~1.11.0",
+    "morgan": "~1.6.1",
+    "serve-favicon": "~2.3.0"
+  }
+}

12_AdvancedRESTAPI/routes/api.js

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+var express = require('express');
+var router = express.Router();
+
+var dogs = [
+  {
+    "dog_id": "0",
+    "dog_name": "Ginger"
+  },
+  {
+    "dog_id": "1",
+    "dog_name": "Ruby"
+  },
+  {
+    "dog_id": "2",
+    "dog_name": "Buddy"
+  }
+];
+
+/* GET all dogs */
+router.get('/dogs/', function(req, res, next) {
+  res.json(dogs);
+});
+
+/* PUT replace all dogs */
+router.put('/dogs/', function(req, res, next) {
+  console.log(req.body);
+  dogs = req.body;
+  res.json({"STATUS": "200 OK"});
+});
+
+/* POST create a new dog */
+router.post('/dogs/', function(req, res, next) {
+  dogs.push(req.body)
+  res.json({"STATUS": "200 OK"});
+});
+
+/* DELETE delete the entire dog collection */
+router.delete('/dogs/', function(req, res, next) {
+  dogs = [];
+  res.json({"STATUS": "200 OK"});
+});
+
+
+/* GET a specific dog */
+router.get('/dogs/:id', function(req, res, next) {
+  var i = 0;
+  var dog = null;
+  for(i = 0; i != dogs.length; i++){
+    if(dogs[i].dog_id == req.params.id){
+      dog = dogs[i];
+      break;
+    }
+  }
+  dog !== null ? res.json(dog) : res.json({"STATUS": "404 NOT FOUND"})
+});
+
+/* PUT replace a specific dog with another dog */
+router.put('/dogs/:id', function(req, res, next) {
+  var i = 0;
+  var dog = null;
+  for(i = 0; i != dogs.length; i++){
+    if(dogs[i].dog_id == req.params.id){
+      dog = dogs[i];
+      break;
+    }
+  }
+  if(dog !== null){
+    dog.dog_name = req.body['dog_name']
+    res.json({"STATUS": "200 OK"});
+  } else {
+    res.json({"STATUS": "404 NOT FOUND"});
+  }
+});
+
+/* DELETE a specific dog from the collection */
+router.delete('/dogs/:id', function(req, res, next) {
+  var i = 0;
+  for(i = 0; i != dogs.length; i++){
+    if(dogs[i].dog_id == req.params.id){
+      dogs.splice(i, 1);
+      return res.json({"STATUS": "200 OK"});
+    }
+  }
+  return res.json({"STATUS": "404 NOT FOUND"});
+});
+
+
+module.exports = router;

12_AdvancedRESTAPI/routes/index.js

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+var express = require('express');
+var router = express.Router();
+
+router.get('/', function(req, res, next) {
+  res.send('Hello World!');
+});
+
+module.exports = router;