Book Image

.Go Programming Blueprints - Second Edition

By : Mat Ryer
Book Image

.Go Programming Blueprints - Second Edition

By: Mat Ryer

Overview of this book

Go is the language of the Internet age, and the latest version of Go comes with major architectural changes. Implementation of the language, runtime, and libraries has changed significantly. The compiler and runtime are now written entirely in Go. The garbage collector is now concurrent and provides dramatically lower pause times by running in parallel with other Go routines when possible. This book will show you how to leverage all the latest features and much more. This book shows you how to build powerful systems and drops you into real-world situations. You will learn to develop high quality command-line tools that utilize the powerful shell capabilities and perform well using Go's in-built concurrency mechanisms. Scale, performance, and high availability lie at the heart of our projects, and the lessons learned throughout this book will arm you with everything you need to build world-class solutions. You will get a feel for app deployment using Docker and Google App Engine. Each project could form the basis of a start-up, which means they are directly applicable to modern software markets.
Table of Contents (19 chapters)
Go Programming Blueprints Second Edition
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface

Handling endpoints


The final piece of the puzzle is the handlePolls function, which will use the helpers to understand the incoming request and access the database and generate a meaningful response that will be sent back to the client. We also need to model the poll data that we were working with in the previous chapter.

Create a new file called polls.go and add the following code:

package main 
import "gopkg.in/mgo.v2/bson" 
type poll struct { 
  ID      bson.ObjectId  `bson:"_id" json:"id"` 
  Title   string         `json:"title"` 
  Options []string       `json:"options"` 
  Results map[string]int `json:"results,omitempty"` 
  APIKey  string         `json:"apikey"` 
} 

Here, we define a structure called poll, which has five fields that in turn describe the polls being created and maintained by the code we wrote in the previous chapter. We have also added the APIKey field, which you probably wouldn't do in the real world but which will allow us to demonstrate how we extract the API key...