Learn Express, Mac and Tachyons

As developers, we have a responsibility to protect the data our users trust us with. No one wants to wake up to the news that their site was hacked and all of the user accounts stolen.

Security is important, yet it is often overlooked and forgotten.

Part of the reason for this is that security seems hard to get right. This results in developers crossing their fingers and hoping for the best.

In this course, you'll learn how to protect your application by learning how to attack it.

Start your journey into web security today!

Check out these [**community notes for this course on Github**](https://github.com/wjohnson85/eggheadio-web-security-essentails).

Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.

express

Web Security Essentials: MITM, CSRF, and XSS

Express is a well-known and supported framework for Node web applications. It provides a lot of excellent functionality to process requests, interact with other APIs, handle authentication and return appropriate requests for any client.

This collection will look at providing an API for a specific application but will explore concepts that will be helpful in building a wide variety of applications.

Building an API with Express

Modern applications know how to keep users informed of realtime updates through notifications, popups, and other messages.

On the development side, the ability to not only create web apps but have them communicate in realtime is a quirky, standout skill for your resume. It’s interesting, useful, and powerful.

In this course, Mark Barton will show you how to use Socket.io to facilitate bi-directional client-server communication and notifications using Vue on the frontend. Socket.io is a JS library that connects a client-side library to a node.js server. In the course, you’ll see how to use Socket.io to broadcast simultaneously to all or targeted clients based on filters you set up — so the right people see the right message at the right time.

You’ll learn to set up and connect Socket.io with node.js and Vue, and you’ll get practice making informed, complex architectural decisions around realtime broadcast messaging.

Vue (pronounced /vjuː/, like view) is a progressive framework for building user interfaces. Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable. The core library is focused on the view layer only, and is very easy to pick up and integrate with other libraries or existing projects. On the other hand, Vue is also perfectly capable of powering sophisticated Single-Page Applications when used in combination with modern tooling and supporting libraries.

Vue and Socket.io for Real-Time Communication

Learn how to build a simple REST API to store notes using the latest built-in node features including native ES modules, the fs/promises API, async/await, the nullish coalescing operator, and destructuring. No compilers, no build steps, pure code.

This collection of lessons is great for beginners to Express as long as they are familiar with JavaScript and the HTTP protocol. Those more familiar with node and express will appreciate a fast-paced, modern take on using these popular tools and will likely benefit most from the lessons on input validation, models (which emphasizes a lot of new syntax), using fs/promises to serialize a `Map`, and accessing asynchronous data with `async/await`.

Pre-requisites:

- [Install curl](https://curl.haxx.se/)
- [Install node 14](http://nodejs.org/)
- Be familiar with the terminal

View the source for this project in the [project's github repo](https://github.com/xjamundx/egghead-express).

**Notes**:

- I'm not very pedantic about REST and basically just mean an API over HTTP
- [Express 5](https://expressjs.com/en/guide/migrating-5.html) is still in alpha (and has been for over two years), but most of these lessons apply to Express 4 as long you use something like [express-async-errors](https://www.npmjs.com/package/express-async-errors) to add support for `async` routes and middleware

Build a REST API with Express 5 and node 14

Bash makes automation easy. Just a few lines of code can take care of repetitive tasks for you and your teammates. 

In this course, we’ll dive deep into the automation potential of bash. You’ll learn to leverage common hooks that open up interesting automation possibilities, like git hooks, adding functions and aliases in your bash_profile, and running scheduled jobs in launchd.

For example, we’ll write a git hook that checks package.json for changes, and if there are changes, the hook runs npm install for you automatically. 

Along the way, you’ll also learn:

- more advanced bash commands like exec
- syntax such as redirecting stdout and stderr to the same destination
- timesaving tricks like brace expansions

Automation is all about saving you time — and at only 52 minutes, this course is well worth yours. Enjoy!

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. Bash is a command processor that typically runs in a text window, where the user types commands that cause actions. Bash can also read and execute commands from a file, called a shell script.

bash

Advanced Bash Automation for Web Developers

While this course is for IBM Domino Developers who are looking to utilize Node.js alongside their applications, or Javascript developers looking to integrate with a Domino server. There are quite a few tips and tricks you can learn for integrating Node.js as a proxy server for any REST API you might want to communicate with your JavaScript Application.

We cover how you can continue to use cookies provided by IBM Domino for user authentication and authorization while accessing a Node.js / Express based application, including modifying the standard login form to expose authentication errors.  

We show how to store user level information inside a JWT giving the option to store functional levels of access safely.  This stateless token can then be decoded server side to list what user roles a user has and therefore can restrict functionality without having to refer back to Domino each time.

The course will demonstrate Create, Read, Update and Delete methods using the Domino Data Services all via the NodeJS application but still maintaining Domino security.

And finally, we show how you can reuse Domino generated HTML inside a handlebars template by scraping and manipulating the HTML.

Integrate IBM Domino with Node.js

JSON Web Token (JWT) is a low overhead option for authentication that is easy to implement and scales with your application. There is no need to store session data as everything you need is stored in an encoded string sent in the JWT, significantly reducing database overhead for your servers.

In this course, we will build a simple authentication server that will act as a token issuer, and we will use those tokens to access resources on an API.  Starting from scratch, you will learn how easy token based authentication can be and will understand how to use them on your APIs as well as on the front end of your web applications.

JSON Web Token (JWT) Authentication with Node.js and Auth0

JavaScript® (often shortened to JS) is a lightweight, interpreted, object-oriented language with first-class functions, most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic, and supports object-oriented, imperative, and functional programming styles.

javascript

Nodejs

Express is a minimal web server built on Node.js that provides essential functionality for delivering web applications to the browser and mobile devices. This series will guide you through the first steps of using Express for building your own applications.

Getting Started with Express.js

Joe Previte is an active egghead instructor and blogger. This is a collection of screencast versions of selected blog posts. You can find his blog here: [joeprevite.com](https://joeprevite.com/)

Joe's Blog Posts as Screencasts

Learn VSCode with Ahmad Awais (Open Source JavaScript DevRel ❯ Google Dev Expert ❯ Author of 3rd most popular VSCode theme called 🦄 Shades of Purple).

React is one of the web’s most popular frameworks for building JavaScript applications. 

If you know what you’re doing, React can drastically simplify how you build, use, and maintain code.

Whether you’re a React newbie or you’re ready for advanced techniques, you can level-up with egghead. Explore our in-depth courses, lessons, and community resources to build more powerful applications and crack open your career.

react

VSCode

`launchd` is a robust scheduled job automation tool on macOS that allows you to schedule a task to be run at recurring times. It's macOS's take on Linux's `cron`. In this lesson, we’ll schedule a simple bash script that empties the Trash to run every Monday morning at 10am. 

First, we’ll create a plist file (a plist file is just XML) with our job configuration. In here, we’ll specify our bash script as the program to run. Then we move plist file to the `~/Library/LaunchAgents` folder. Then we’ll use launchctl to load our configuration file, which will make the job active. We'll manually activate our job to ensure it's working with `launchctl kickstart`. 

Schedule Timed Jobs on macOS with `launchd`

AppleScript is a peculiar language with a COBOL-like desire to read like English, but it's the key to automating UIs on the Mac. We'll use it together with bash to make Terminal open a new window to run any shell command.

Run a Command-line App in a New Terminal Window using Bash and AppleScript

In [the previous lesson](https://egghead.io/lessons/bash-run-a-command-line-app-in-a-new-terminal-window-using-bash-and-applescript "Run a command-line app in a new terminal window") we created a bash script that runs a given command line in a new Terminal window. Now we'll see how to use Automator to make an instance of that available as a menu item in Finder.

Turn a command-line app into a menu item in Finder

In this lesson we create a very simple web page to connect to our socket Server.

Once a client connects, it is assigned a unique random identifier as its socket ID and we will log this out to the Server console.

We will send out a random number on the socket every second and demonstrate multiple clients receiving this value at the same time.



Set up a simple Socket.io client to connect to the server.

In this lesson we connect a Vue application to our Socket Server.  

We use the pulse from the previous lesson to display a graph using the Vuetify framework and then demonstrate 2 clients showing the graph changing in sync.

Connect a Vue.js Component to a Socket.io server

**Note:** If you want to understand and follow along with the logging service Mark uses, watch this lesson: [NodeJS Logging using Winston and Papertrail](https://egghead.io/lessons/javascript-nodejs-logging-using-winston-and-papertrail)

In this lesson we will get an Express Server up and running with Socket.io.  We will build the Socket.io logic in a seperate file to demonstrate how the Socket.io instance can be used within other parts of the Express Application.

This lesson is short and sweet and lays the groundwork for the other lessons in this course. 

If you get an error starting the server which indicates a Papertrail connection error then you have not updated the Papertrail host and port in the logger.js.

You can safely ignore this error if you do not wish to use Papertrail - else you can sign up to a free Papertrail account and add the correct host and port.

Getting started with Express and Socket.io

Using a HTTP POST to trigger a message which is broadcast to all connected clients via Socket.io.  The message is displayed within a Vue component, which in this case is a [Vuetify snackbar](https://vuetifyjs.com/en/components/snackbars) component. 

As part of the lesson we demonstrate transmitting an object so we can dynamically change the snackbar color, as well as the message itself.

An example where this approach might be used is where you want a server monitoring system call a web hook on your server when there is an issue, this in turn pushes a message to connected clients, simultaneously and in real time.

Display a broadcast message using a Vuetify snackbar component which is sent via Socket.io

Often we need to send data to specific users or groups of users using Socket.io, but by default Socket.io only provides a unique volatile ID so this lesson will demonstrate how we can map on the Server a known User with that Socket ID.

The lesson will build a new Vue component which will allow a User to select their name and group and then send this information from the client to the server using the Socket.

This lesson will also use SessionStorage to store this information so if the browser is refreshed then the component will be auto populated and the details sent to the server.

Mapping a Socket.io id to a known User using an example Vue component.

In this lesson we create a Quiz Vue component which displays a random image.

The random image is read from the Server filesystem and sent over the socket to each of the connected clients.  The clients use the Quiz component to display the image in a modal window and then select an answer.  The answer is then sent back to the server over the socket.

Sending an Image from Express to a Vue Component using Socket.io

Building on the previous lesson this lesson will build a Vue component for composing a message to send to a specific user or group of users.

The lesson will not use HTTP for communication between Server and Client and Client to Server but instead use Socket.io to demonstrate bi-directional real time communication.

Once the payload has been received at the server the targeted User or Group will be identified and Socket.io will then emit the payload to them.  The clients will then use the previous lessons PopupMessage component to display the message. 

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