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

grequests – a REST API package for Go


The developers who worked on Python know about the Requests library. It is a clean, short library that is not included in the standard library of Python. The Go package grequests is inspired by that library. It provides a simple set of functions, using which we can make API requests such as GET, POST, PUT, and DELETE from our Go code. Using grequests allows us to encapsulate the inbuilt HTTP request and response. To install the grequests package for your Go, run the following command:

go get -u github.com/levigross/grequests

Now, see this basic program illustrating the use of the grequests library to make a GET request to a REST API. Create a directory called grequests in your Go source directory and add a file called basicRequest.go, as shown in the following code snippet:

package main

import (
  "github.com/levigross/grequests"
  "log"
)

func main() {
  resp, err := grequests.Get("http://httpbin.org/get", nil)
  // You can modify the request by passing...