Building Web Applications with Erlang: Working with Yaws

Introduction

In the rapidly evolving landscape of web development, choosing the right technology stack can make or break a project. Erlang, a language originally designed for building robust, fault-tolerant telecom systems, has emerged as a powerful contender for building highly concurrent and resilient web applications. Building Web Applications with Erlang: Working with Yaws by Zachary Kessin is a practical, hands-on guide that bridges the gap between Erlang's telecom roots and modern web development. Published by O'Reilly Media, this hardcover edition is an essential resource for Indian developers, students, and tech professionals who want to master the art of building scalable web services using Erlang and the Yaws web server.

Book Overview

This book takes a project-based approach, walking you through the creation of a complete web service from scratch. Rather than drowning you in theory, Zachary Kessin focuses on real-world implementation. You will learn how to serve both static and dynamic content, handle RESTful APIs, manage WebSocket connections, and leverage Erlang's concurrency model to build business-critical services. The book assumes basic familiarity with Erlang, making it ideal for experienced web developers who are ready to explore a functional, concurrent paradigm. By the end, you will have a working web service and the confidence to deploy Erlang in production environments.

Key Highlights

• Hands-On Project: Build a complete web service step by step, from design to deployment.
• Yaws Web Server: Deep dive into Yaws, a powerful Erlang-based web server for serving dynamic and static content.
• RESTful Services: Learn to design and implement REST APIs using Erlang's strengths in concurrency and fault tolerance.
• Real-Time Communication: Explore WebSockets for building interactive, real-time web applications.
• Data Encoding: Master techniques for encoding Erlang data structures into JSON and XML for client consumption.
• Fault Tolerance: Understand how Erlang's "let it crash" philosophy translates into robust web services.

Inside the Book

The book is structured to gradually increase in complexity. It begins with setting up the Yaws server and serving basic pages. You will then move on to handling HTTP requests, processing form data, and integrating with databases. Subsequent chapters cover advanced topics like managing state in a concurrent environment, building APIs, and pushing data to clients via WebSockets. Throughout, the author emphasizes practical patterns for building services that remain responsive under heavy load. Code examples are clear, well-commented, and directly applicable to real projects.

Key Topics

• Introduction to Erlang for web development
• Installing and configuring the Yaws web server
• Serving static and dynamic content with Yaws
• Building RESTful endpoints with Erlang
• Handling HTTP requests, responses, and sessions
• Encoding data to JSON and XML
• Implementing WebSockets for real-time updates
• Concurrency patterns for web applications
• Error handling and fault tolerance strategies
• Deploying and scaling Erlang web services

Reader Benefits

By reading this book, you will gain a rare but highly valuable skill set. Erlang is not a mainstream language, but its ability to handle millions of concurrent connections with minimal resources makes it a secret weapon for high-performance systems. Indian developers working on fintech, e-commerce, messaging apps, or IoT platforms will find Erlang's reliability unmatched. You will learn to write code that is not only correct but also resilient to failures. The book also saves you months of trial-and-error by sharing battle-tested patterns from real-world deployments.

Learning Outcomes

• Build and deploy a fully functional web service using Erlang and Yaws.
• Design RESTful APIs that leverage Erlang's concurrency model.
• Serve dynamic content and handle user sessions efficiently.
• Encode and decode JSON and XML data for web clients.
• Implement WebSocket-based real-time features.
• Apply fault-tolerant design principles to web applications.
• Understand the trade-offs between Erlang and other web frameworks.

Who Should Read

This book is tailored for web developers who already know the basics of Erlang and want to apply it to web projects. It is also suitable for software engineers transitioning from object-oriented languages like Java or Python into functional programming. Students pursuing advanced degrees in computer science, especially those interested in distributed systems or high-concurrency architectures, will find this book invaluable. Additionally, startup founders and tech leads evaluating Erlang for their next product can use this book to quickly prototype and validate ideas. It assumes familiarity with HTTP, HTML, and basic database concepts.

About the Author

Zachary Kessin is a seasoned software engineer and consultant with deep expertise in Erlang, web technologies, and distributed systems. He has built and deployed large-scale applications for global clients. His writing style is practical and direct, reflecting years of hands-on experience. He is passionate about teaching developers how to harness the power of functional programming for building reliable services.

About the Publisher

O'Reilly Media is a world-renowned publisher of technology books, known for their high-quality, practitioner-focused content. Their books are written by experts who tackle real-world problems. This hardcover edition from O'Reilly ensures durability, making it perfect for a developer's desk or library. Indian readers can trust O'Reilly's reputation for delivering authoritative and up-to-date technical knowledge.

Conclusion

Building Web Applications with Erlang: Working with Yaws is more than just a tutorial—it is a gateway to mastering a technology stack that powers some of the most reliable systems in the world. Whether you are building a high-traffic API, a real-time chat application, or a fault-tolerant backend, this book equips you with the skills and confidence to succeed. For Indian developers looking to stand out in a competitive job market, Erlang expertise is a unique differentiator. Order your hardcover copy from Bookshops.in today and take the first step toward building web applications that never go down.