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

pq, a pure PostgreSQL database driver for Go


In the previous chapters when we dealt with SQLite3, we used an external library called go-sqlite3. In the same way, a database driver library is available to bridge both Go and PostgreSQL. That library is called pq. We can install that library using the command:

go get github.com/lib/pq

After getting this library, we need to use it in a similar way to SQLite3. The API will be in line to the database/sql package of Go. In order to create a new table, we should initialize the DB. To create a new database, just type this command from the psql shell, as shown in the following command; it is a one-time thing:

CREATE DATABASE mydb;

Now, we will write a small code illustration that explains the usage of the pq driver. Create a directory called models in your $GOPATH. Here, my GOPATH is /home/naren/workspace/. Similar to all the previous examples in the former chapters, we will create our packages and application sources in the src/ directory:

mkdir github...