Web Development with Julia and Genie: A hands-on guide to high-performance server-side web development with the Julia programming language

by Adrian Salceanu, Ivo Balbaert, Logan Kilpatrick

Length: 254 pages
Edition: 1
Language: English
Publisher: Packt Publishing
Publication Date: 2022-11-29
ISBN-10: 180181113X
ISBN-13: 9781801811132
Sales Rank: #896384 (See Top 100 Books)

Get a practical overview of web development in Julia and learn how to build MVC applications with a REST API, and an interactive data dashboard using the Genie web framework

Key Features

A tutorial on web development from Julia expert, Ivo Balbaert and the creator of the Genie framework, Adrian Salceanu
A step-by-step approach to building a complete web app with the Genie framework
Develop secure and fast web apps using server-side development on Julia

Book Description

Julia’s high-performance and scalability characteristics and its extensive number of packages for visualizing data make it an excellent fit for developing web apps, web services, and web dashboards. The two parts of this book provide complete coverage to build your skills in web development.

First, you’ll refresh your knowledge of the main concepts in Julia that will further be used in web development. Then, you’ll use Julia’s standard web packages and examine how the building blocks of the web such as TCP-IP, web sockets, HTTP protocol, and so on are implemented in Julia’s standard library. Each topic is discussed and developed into code that you can apply in new projects, from static websites to dashboards. You’ll also understand how to choose the right Julia framework for a project. The second part of the book talks about the Genie framework. You’ll learn how to build a traditional to do app following the MVC design pattern. Next, you’ll add a REST API to this project, including testing and documentation. Later, you’ll explore the various ways of deploying an app in production, including authentication functionality. Finally, you’ll work on an interactive data dashboard, making various chart types and filters.

By the end of this book, you’ll be able to build interactive web solutions on a large scale with a Julia-based web framework.

What you will learn

Understand how to make a web server with HTTP.jl and work with JSON data over the web
Discover how to build a static website with the Franklin framework
Explore Julia web development frameworks and work with them
Uncover the Julia infrastructure for development, testing, package management, and deployment
Develop an MVC web app with the Genie framework
Understand how to add a REST API to a web app
Create an interactive data dashboard with charts and filters
Test, document, and deploy maintainable web applications using Julia

Who this book is for

This book is for beginner to intermediate-level Julia programmers who want to enhance their skills in designing and developing large-scale web applications. The book helps you adopt Genie without any prior experience with the framework. Julia programming experience and a beginner-level understanding of web development concepts are required.

Web Development with Julia and Genie
Foreword
Contributors
About the authors
About the reviewers
Preface
    Who this book is for
    What this book covers
    To get the most out of this book
    Download the example code files
    Download the color images
    Conventions used
    Get in touch
    Share your thoughts
    Share your thoughts
    Download a free PDF copy of this book
Part 1: Developing Web Apps with Julia
Chapter 1: Julia Programming Overview
    Technical requirements
    Working with Julia
        Using the REPL to use Julia interactively
        Using the package mode to jump-start a project
        Using Julia with the VS Code plugin
    Types, flow controls, and functions in Julia
        Types
        Flow controls
        Functions and methods
    Useful techniques in Julia web development
    Using Julia modules and packages
        Modules
        Packages and projects
        Parsing a CSV file
    How Julia works
    Why Julia is a good fit for web development
    Summary
    Further reading
Chapter 2: Using Julia Standard Web Packages
    Technical requirements
    Making a TCP echo server with TCP-IP sockets
        The first version of an echo server
        A more sophisticated version of an echo server
    Using WebSockets
    Building HTTP client and server functionality
        Using HTTP as a web client
        Setting up a web server with HTTP
    Working with JSON data using a REST web server
        Using the JSON3 package
        Writing REST service endpoints for a ToDo app
        Testing the ToDo services in the REPL
        Testing the ToDo services with Postman
        Testing the ToDo services with curl
    Summary
    Further reading
Chapter 3: Applying Julia in Various Use Cases on the Web
    Technical requirements
    Using Franklin to build static websites in Julia
    Using Julia with JavaScript
        JSExpr
        Blink
        WebIO
        Integration with NodeJS
    Building microservices with Julia
    Building dashboards with Julia
    Compiling Julia in WASM
    Using cloud services with Julia
        Deployment to cloud platforms
        Deployment to container platforms
    Choosing the right Julia framework for a project
        Genie
        Bukdu
        Interact
        Mux
        Merly
        Dance
    Summary
Part 2: Using the Genie Rapid Web Development Framework
Chapter 4: Building an MVC ToDo App
    Technical requirements
    Creating and configuring the app
        Pausing development
        Setting up the DB
        Creating our table
        Setting up the model
    Creating controllers and views
    Routing requests and rendering various pages
        Using a layout file
        View partials
        Adding validation
    Updating and deleting todos
        Enhancing our app with custom JavaScript and CSS
        Updating to-do items
        Deleting to-do items
        Aggregate values and filters
    Testing Genie apps
        Writing and running our first tests
        Configuring the test DB
        Adding Todo model unit tests
        Interacting with the DB
        Adding integration tests
    Summary
    Further reading
Chapter 5: Adding a REST API
    Technical requirements
    Extending a web app with a REST API
        Preparing for a REST API
        Listing todos
        Adding pagination
        Creating todos
        Updating todos
        Deleting todos
        Retrieving todos
    Writing tests for a REST API
    Documenting our API with the Swagger UI
    Summary
    Further reading
Chapter 6: Deploying Genie Apps in Production
    Technical requirements
    Genie app environments
        Customizing the environments
        Creating extra environments
        SearchLight database environments
        Changing the active environment
        Starting the application in production
    Containerizing Genie apps with Docker
    Setting up our GitHub repository for CI
    Deploying Genie apps with Git and Docker containers
        AWS EC2 hosting
        Installing and configuring Docker
        Cloning the GitHub repository
        Setting up the production database on AWS
        Preparing our production app to use the RDS database
    Improving application startup time using a custom sysimage
    Deploying our optimized app on Heroku
    Wrapping up the benefits of Docker
    Summary
Chapter 7: Adding Authentication to Our App
    Technical requirements
    Adding and configuring the GenieAuthentication plugin
        Configuring the GenieAuthentication plugin
        Setting up the database
        Restricting access to the app
        Registering a new user
    Restricting access to the data
        Adding the user ID to the to-do items
        Modifying the Todo model
        Getting information about the authenticated user
        Filtering the to-dos by user ID
        Setting the user ID when creating a new to-do item
        Enhancing the validation rules
        Securing all the public-facing pages
        Securing the API
    Updating our tests
        Enabling basic authentication
        Genie hooks
        Setting up the authentication flow
        Creating the default test user
        Wrapping up the tests
    Summary
Chapter 8: Developing Interactive Data Dashboards with Genie
    Technical requirements
    Augmenting data
    Generating random data
    Building our data dashboard
        Using Genie with low-code and reactive programming
        Designing the dashboard view
        Updating the dashboard view
        Adding the routes
    Adding the final touches
        Adding pagination to the to-do list
        Updating the to-do item creation
        Adding navigation
        Updating the to-do list
        Redirecting after login
    Summary
Index
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