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

Painless middleware chaining with Alice


The Alice library reduces the complexity of chaining the middleware when the list of middleware is big. It provides us with a clean API to pass the handler to the middleware. In order to install it, use the go get command, like this:

go get github.com/justinas/alice

Now we can import the Alice package in our program and use it straight away. We can modify the sections of the preceding program to bring the same functionality with improved chaining. In the import section, add github.com/justinas/alice, like the following code snippet:

import (
    "encoding/json"
    "github.com/justinas/alice"
    "log"
    "net/http"
    "strconv"
    "time"
)

Now, in the main function, we can modify the handler part like this:

func main() {
    mainLogicHandler := http.HandlerFunc(mainLogic)
    chain := alice.New(filterContentType, setServerTimeCookie).Then(mainLogicHandler)
    http.Handle("/city", chain)
    http.ListenAndServe(":8000", nil)
}

The complete code with...