HackYourFuture Node.js Week 1 - Homework

Setup

Follow these instructions to set up your environment.

1. Fork this repository and clone it to your hard drive

Follow the general homework instructions for this.

2. Install dependencies

Change to the directory where you've cloned this repository, then to week1/homework directory and finally install dependencies using npm.

cd path/to/your/cloned/repo
cd week1/homework
npm install

3. Run the project from that directory

node .

Assignment

Create an HTTP server that can add and subtract from a number, which we will call state.

Rule 1

DO NOT USE EXPRESS.JS

Rule 2

You can use other packages, but you must also make a version without any npm packages. http, of course, is a built-in Node.js package, so you can use that.

// The state variable
let state = 10;

Endpoints criteria

/* /state
 * response: the current state in a HTML format
 * When the server starts, this should return '10'
 */
const stateUrl = 'http://localhost:8080/state';

/* /add
 * Response: "OK" in HTML format
 * This should add 1 to the current state
 */
const addUrl = 'http://localhost:8080/add';

/* /subtract
 * Response: "OK" in HTML format
 * This should subtract 1 ƒrom the current state
 */
const subtractUrl = 'http://localhost:8080/subtract';

/* /reset
 * Response: "OK" in HTML format
 * This should set the state back to '10'
 */
const resetUrl = 'http://localhost:8080/reset';

/* Any other URL
 * Response: return error code 404: 'Not found' with a friendly message and do
 * not change the state variable
 */
const badUrl = 'http://localhost:8080/bad';

Reading

Callbacks

Video: https://www.youtube.com/watch?v=pTbSfCT42_M Read: http://callbackhell.com/

Require/exporting

Video: https://www.youtube.com/watch?v=e1Ln1FrLvh8 Read: http://openmymind.net/2012/2/3/Node-Require-and-Exports/

http, listen

• Video basic: https://www.youtube.com/watch?v=pYOltVz7kL0
• Video routing: https://www.youtube.com/watch?v=_D2w0voFlEk (please focus on request.url, not request.method)
• Read: Node.js documentation about http
• Read Advanced:

While not strictly homework, we’ve created another playlist if you’d like to learn more or review (and as JavaScript developers, you should) https://www.lynda.com/SharedPlaylist/78e6513f51bb4102b03349460491b4e3