Book Image

Building RESTful Web services with Go

By : Naren Yellavula
Book Image

Building RESTful Web services with Go

By: Naren Yellavula

Overview of this book

REST is an architectural style that tackles the challenges of building scalable web services and in today's connected world, APIs have taken a central role on the web. APIs provide the fabric through which systems interact, and REST has become synonymous with APIs. The depth, breadth, and ease of use of Go, makes it a breeze for developers to work with it to build robust Web APIs. This book takes you through the design of RESTful web services and leverages a framework like Gin to implement these services. The book starts with a brief introduction to REST API development and how it transformed the modern web. You will learn how to handle routing and authentication of web services along with working with middleware for internal service. The book explains how to use Go frameworks to build RESTful web services and work with MongoDB to create REST API. You will learn how to integrate Postgres SQL and JSON with a Go web service and build a client library in Go for consuming REST API. You will learn how to scale APIs using the microservice architecture and deploy the REST APIs using Nginx as a proxy server. Finally you will learn how to metricize a REST API using an API Gateway. By the end of the book you will be proficient in building RESTful APIs in Go.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Summary


In this chapter, we started our journey by installing PostgreSQL. We introduced PostgreSQL formally and tried to see all possible SQL queries for CRUD operations. We then saw how to add users and databases in PostgreSQL. We then installed and explained pq, a Postgres driver for the Go language. We explained how the driver API performs raw SQL queries. 

Then came the implementation part of the URL shortening service; that REST service takes the original URL and returns a shortened string. It also takes the shortened URL and returns the original URL. We wrote a sample program to illustrate the Base62 algorithm that powers our service. We leveraged this algorithm in our service next and created a REST API.

GORM is a well-known object-relational mapper for Go. Using an ORM, one can easily manage the database operations. GORM provides a few useful functions, such as AutoMigrate (create a table if one doesn't exist), for writing intuitive Go code over the traditional database/sql driver...