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

express

Learn Express

 Every developer who has attempted to demystify OAuth 2.0 must be presented with mind-bugging complicated flow diagrams. It becomes worse when you try to understand all the terminologies of OAuth 2.0 and Open ID protocols.

There is no getting around the OAuth 2.0 flow being complicated with back and forth between your browser, the service you are authenticating with, and the application you want to access. 

This course gets straight to the point without any application code distracting you from the core takeaway -- You will learn how to authenticate and authorize yourself using GitHub as your Auth Server.

We'll first cover the OAuth 2.0 flow for authentication and then integrate the Open ID protocol for authorization.

[**LIVE EVENT**: Register here for a live webinar with Christian on OAuth.](https://egghead.zoom.us/webinar/register/WN_Sxy1FEcoTea8UA6F7EDzLw) Bring any questions you have from taking this course!

JSON Web Tokens are an open, industry standard RFC 7519 method for representing claims securely between two parties.

Add Github Login to Your Web App with OAuth 2.0

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

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).

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

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

In this lesson you will learn how to support data modification by handling HTTP verbs besides GET. We will look at how to edit, save, and delete content with `.put` and `.delete`.

Save and Delete Content in Express with HTTP Verbs

Streams are a big part of Node's famous non-blocking I/O, and Express lets you take full advantage of them. This lesson demonstrates how to integrate streams into your server to improve performance and simplify your code. 

We will look at `.creatReadStream`, `.createWriteStream`, and `.pipe`  to read and write from streams. 

Use Streams in Express

Sometimes you just need to serve existing files. In this lesson we'll examine how to use functionality built into Express to do just that.

Serve static files with express

As your application grows, it's easy to end up with a long list of route handlers and helper functions. In this lesson we'll look at strategies for keeping things organized and manageable.

We will move individual subpaths into their own file by using `.router` to create an instance of the Express router.

Organize Code by Subpath in Express

High availability apps require that no distinction be made between local and remote services. Attached resources should be accessed by environment variables, and in doing so allow you to swap out one attached resource for another. 

In this lesson we will setup a reverse proxy that directs image path requests and routes them through a defined server URL. By doing so, we decouple server requests for images which allows for easy switching from locally-served image assets to a CDN by simply updating an environment variable.

Proxy Requests for Local and Remote Service Parity

This lesson will walk you through replacing the app's file system reliance with a live MongoDB database. We'll also use a popular ORM library to manage our database operations.

Integrate MongoDB into your Express App

Template engines allow you to define your UIs in a declarative manner while maintaining a dynamic, data driven presentation layer. This lesson will demonstrate how to use template engines that have built-in support for Express as well as engines without explicit Express support.

Use Template Engines with Express

Routing is a fundamental aspect of Express. This lesson demonstrates how to define dynamic routes and access route parameters in your code.

Define dynamic routes through Express

In this lesson we will initialize our Express application using  `npm init`. 

After loading express through npm we will look at a couple basic functions Express exposes to us such as `.get` and `.send`. This will allow basic interaction via the url.

We will also see how using a package like `nodemon` can allow for rapid iteration when developing an application.



Create a Basic Server with Express

Mongoose allows you to easily select resources by ID from your MongoDB. This is an important aspect to creating an API.

Select by ID with Mongoose and Express

Take your routing skills to the next level and learn to recover from errors, initiate downloads, and go beyond simple request and response. When we get a route that does not match we don't want the page to just error out. With `.redirect` we can send the user to an error page and display a helpful message.

We will go on to see how to download a file with `.download` and track behavior with `get.all`.

Handle Errors with a Redirect in Express

Express 4 is almost ready for release. The previous lessons looked at Express 3, but will use Express 4 going forward. This lesson will explain some of the main breaking changes.

Migrate to Express 4

In this lesson we will find out how to serve static assets (images, css, stylesheets, etc.) with Express. We will go over writing initial boilerplate for a simple Express app, and using Express's built-in middleware to serve these assets through a web server on Node.js.

Serve Static Files with Express

Middleware is what Express apps are made of. While the term may be unfamiliar, the techniques and concepts aren't. This lesson will round out your understanding of the various types of middleware and how to use them.

Handle Errors with Express Middleware

First and foremost, DO NOT use Google Sheets for *any* production app. It's fine for fun side projects for your family or friends, but not much more. With those disclaimers in mind, Google sheets can be complicated to set up if you don't follow precise configuration steps. This lesson walks you through setting up Google sheets credentials, authentication, getting/appending values, then finally wrapping the sheets api with Node.js and Express to use in a simple project.

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Express