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Build a RESTful API Using Node and Express 4

Build a RESTful API Using Node and Express 4
# Express Router and Routes We will use an instance of the Express Router to handle all of our routes. Here is an overview of the routes we will require, what they will do, and the HTTP Verb used to access it. This will cover the basic routes needed for an API. # Route Middleware We’ve already defined our first route and seen it in action. Let’s say that we wanted something to happen every time a request was sent to our API. All we needed to do to declare that middleware was to use router.use(function()). We are sending back information as JSON data. We will also add next() to indicate to our application that it should continue to the other routes. Middleware Uses Using middleware like this can be very powerful. Testing Our Middleware Now when we send a request to our application using Postman, Something is happening will be logged to our Node console (the command line). With middleware, we can do awesome things to requests coming into our API. # Creating the Basic Routes Related:  NodeVolkenoNode

Web App + REST API with Express, PostgreSQL and Nunjucks on Yarn In this article I'll show you how to create a basic web application in Node from scratch. I'll be using yarn instead of npm. I issue HTTP requests using httpie instead of curl. Let's start with an empty directory: cd myapp $ yarn init Install express yarn add express Inside index.js, add first (root) route which renders a simple text: const express = require(‘express’) const app = express(); app.get('/', (req, res) => { res.send('Hello World') }) app.listen(3000, () => { console.log('listening on 3000') }) Auto-reloading Install nodemon to restart the server when there is a change yarn add nodemon --dev --dev as Nodemon is used only for development. You can run it by hand . or directly with yarn (as it detects binaries) yarn run nodemon or you can put it into package.json (for later customization) and to be run as yarn run dev HTML view Create index.html in the root of the project: <! Add path dependency at the top of index.js: const path = require('path') Add new route, let’s call it /html Request logger

RESTful API Design With NodeJS & Restify - Tuts+ Code Tutorial The RESTful API consists of two main concepts: Resource, and Representation. Resource can be any object associated with data, or identified with a URI (more than one URI can refer to the same resource), and can be operated using HTTP methods. Representation is the way you display the resource. In this tutorial we will cover some theoretical information about RESTful API design, and implement an example blogging application API by using NodeJS. Choosing the correct resources for a RESTful API is an important section of designing. First of all, you need to analyze your business domain and then decide how many and what kind of resources will be used that are relevant to your business need. You can proceed with a resource operation after you have decided on the required resources. In the same way, you can view an existing article by issuing the following request: What about updating an existing article? I can make another POST request to /articles/update/123456789012 with the payload. or:

RESTful API User Authentication with Node.js and AngularJS In this second part of our User Authentication series I will show you how to hook up a frontend to our REST API backend. We will craft a little Ionic app with AngularJS, but the code and concept is almost the same for a pure AngularJS webapp. If you came directly to this post, make sure to follow the first step or have some kind of backend already in place! RESTful API User Authentication with Node.js and AngularJS – Part 1/2: Server This part will cover a lot of code including HTML templates, so if you want it the lazy way grab your code below, but make sure to follow the article to understand what we do! Creating the basic app First of all we start (as always) with a blank Ionic app, so go ahead and run: Start a blank Ionic Project We will have quite some files, so create all these folders and files under www: Last thing for now is to include all the javascript files in our index.html so open the file and append right at the end of the header: Crafting our views Ready for some code? Next?

express-mongoose-generator It’s a mongoose model, REST controller and Express router code generator for Express.js 4 application It’s a mongoose model, REST controller and Express router code generator for Express.js 4 application. Installation $ npm install -g express-mongoose-generator Usage Non-Interactive mode Generates a Mongoose model, a REST controller and Express router : $ mongoose-gen -m car -f carDoor:number,color -r create: . create: . create: . Options -m, --model <modelName> - the model name. Available types stringnumberdatebooleanarrayobjectId Interactive mode $ mongoose-gen Model Name : car Available types : string, number, date, boolean, array Field Name (press <return> to stop adding fields) : door Field Type [string] : number Field Name (press <return> to stop adding fields) : color Field Type [string] : Field Name (press <return> to stop adding fields) : owner Field Type [string] : objectId Reference (model name referred by the objectId field) : User Field Name (press <return> to stop adding fields) : create: . Model if!

How to post to api from Express.js Error Handling Share: Error handling is a pain, and it's easy to get by for a long time in Node.js without dealing with many errors correctly. But building robust Node.js apps requires dealing properly with errors, and it's not hard to learn how. This document will answer several questions that programmers new to Node.js often ask: In functions that I write, when should I throw an error, and when should I emit it with a callback, event emitter, or something else? This document is divided into several parts that build on one another: Background This document assumes: You're familiar with the idea of exceptions in JavaScript, Java, Python, C++, or any similar language, and that you know what it means to throw and catch them.You're familiar with programming in Node.js. function myApiFunc(callback) { /* * This pattern does NOT work! does not work to handle errors. You should also be familiar with the three main ways to deliver an error in Node.js: We'll discuss when to use each of these patterns below. 1. 2. 3.

Passwordless - A node.js/express module for token-based logins RESTful API User Authentication with Node.js and AngularJS My all time most viewed article is How To Handle User Authentication With AngularJS Inside Your Ionic App, and it’s also the one with the most questions. User authentication is one of the features almost every app(web and mobile) needs today. In this series I will show you my best practice for creating a RESTful API with user authentication. We will craft a little Node.js server which will allow us to sign up, authenticate and afterwards take request for protected endpoints. The second part will be how to build the frontend for such a REST backend. RESTful API User Authentication with Node.js and AngularJS – Part 2/2: Frontend I use Node.js because it’s simple and straightforward, but you could obviously have any framework in the backend you like (or already have). Setting up our little Node.js backend Although I did not think about it, I used the complete MEAN stack for this series. I will come to what’s inside those files later, for now just have the structure ready. Conclusion

generator-mongoose A mongoose schema generator for Yeoman ![Gitter]( Chat.svg) A generator for Yeoman. Getting Started What is Yeoman? Trick question. Basically, he wears a top hat, lives in your computer, and waits for you to tell him what kind of application you wish to create. Not every new computer comes with a Yeoman pre-installed. $ npm install -g yo Generator Mongoose While running through a leafy mongodb field he picked up mongoose. To install generator-mongoose from npm, run: $ npm install -g generator-mongoose Finally, initiate the generator: $ yo mongoose It should output a file structure similiar to: .bowerrc .editorconfig .jshintrc config/ - db.js public/ css/ - style.css js/ - script.js models/ - post.js routes/ - index.js - post.js test/ - test-post.js views/ - index.html bower.json Gruntfile.js package.json Readme.md Run the app Development mode $ grunt or $ grunt server Production mode $ grunt prod Sub Generator Schema Run the sub generator for schemas: output: Getting To Know Yeoman

Creating RESTful APIs with Express 4 With the release of Express 4 it has gotten even easier to create RESTful APIs. If you are creating a Single Page App you will definitely need a RESTful web service which supports CRUD operations. My last tutorial focussed on creating a Single Page CRUD app with Angular’s $resource. This tutorial explains how to design the backend API for such a CRUD app using Express 4. Just note that a lot has been changed since Express 3. This tutorial doesn’t explain how to upgrade your app from Express 3 to Express 4. Creating the API for the Movie App Our app will be a simple movie database which supports basic CRUD operations. Before going further let’s take a look at what the API will look like: Directory Structure We will use the following directory structure in our app: Here are some points about the above directory structure: The bin/www.js is used to bootstrap our app.The models directory stores our mongoose models. Finally, node_modules and package.json are the usual components of a Node.js app.

Build your first Node.js microservice - Max Stoibers Blog A microservice is a single self-contained unit which, together with many others, makes up a large application. By splitting your app into small units every part of it is independently deployable and scalable, can be written by different teams and in different programming languages and can be tested individually. micro is a tiny (~100 LoC) module that makes writing a microservice in Node.js a joy. The Setup There are two tiny steps needed for the setup, first we need to install micro: I’m installing it globally to make sure we get access to the micro command. And second we need to create a file that will contain our microservice. The First Steps Our index.js file needs to export a single function, which micro will pass the incoming request and a response object to: module.exports = function (request, response) { // Your microservice here} The main function we’ll use from micro is send, which allows us to send a response back to the client. Starting our microservice is just one command away:

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