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

Creating a CLI tool as an API client for the GitHub REST API


After looking at this example, we are able to easily access the GitHub API from our Go client. We can combine both of the techniques we learned in this chapter so far to come up with a command-line tool that consumes the GitHub API. Let us create a new command-line application which: 

  • Provides options to get repo details by username
  • Uploads any file to GitHub gists (text snippets) with a given description
  • Authenticates using a personal access token

Note

Gists are snippets provided by GitHub to store text content. For more details, visit https://gist.github.com.

Create a program called gitTool.go in the githubAPI directory. This will be the logic for the preceding program specification:

package main

import (
  "encoding/json"
  "fmt"
  "github.com/levigross/grequests"
  "github.com/urfave/cli"
  "io/ioutil"
  "log"
  "os"
)

var GITHUB_TOKEN = os.Getenv("GITHUB_TOKEN")
var requestOptions = &grequests.RequestOptions{Auth: []string...