02 | Introduction to Express Stacey Mulcahy | Technical Evangelist Rami Sayar | Technical Evangelist

What is Express Installing & Using Express Demo: Creating a simple REST API Templating Module Overview

02 | What is Express Stacey Mulcahy | Technical Evangelist Rami Sayar | Technical Evangelist

What is Express? Express is a minimal, open source and flexible node.js web app framework designed to make developing websites, web apps and APIs much easier.

Why use Express? Express helps you respond to requests with route support so that you may write responses to specific URLs. Supports multiple templating engines to simplify generating HTML.

02 | Installing and Using Express Stacey Mulcahy | Technical Evangelist Rami Sayar | Technical Evangelist

Installing and Using Express npm install express npm install jade

02 | Creating a Simple REST API Stacey Mulcahy | Technical Evangelist Rami Sayar | Technical Evangelist

Explanation of Routes A router maps HTTP requests to a callback. HTTP requests can be sent as GET/POST/PUT/DELETE, etc. URLs describe the location targeted. Node helps you map a HTTP GET request like: – To a request handler (callback) app.get('/index', function (req, res) {});

Creating a Simple Express Application var express = require('express'); var app = express(); app.get('/', function (req, res) { res.json({message:'hooray! welcome to our api! '}); }); app.listen(process.env.PORT || 8080);

DEMO Creating a simple REST API with Express Framework

DEMO Using the express-generator package.

DEMO Using Express for Multiple Pages with Query Parameters

Building a RESTful API for Dogs ResourceGETPUTPOSTDELETE Collection URI, such as xample.com /v1/dogs/ List all the dogs Replace all the dogs with a new collection of dogs. Create a new dog in the collection. Delete the entire dog collection. Element URI, such as xample.com /v1/dog/1 Get a specific dog. Replace a dog in the collection with another dog. Not used. Delete the dog from the collection.

DEMO Using Express to build a RESTful API

Resources Express Framework Intro to Express net net Jade Templates JavaScript and Jade Templating templating

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