Book Image

Go Programming Cookbook - Second Edition

By : Aaron Torres
Book Image

Go Programming Cookbook - Second Edition

By: Aaron Torres

Overview of this book

Go (or Golang) is a statically typed programming language developed at Google. Known for its vast standard library, it also provides features such as garbage collection, type safety, dynamic-typing capabilities, and additional built-in types. This book will serve as a reference while implementing Go features to build your own applications. This Go cookbook helps you put into practice the advanced concepts and libraries that Golang offers. The recipes in the book follow best practices such as documentation, testing, and vendoring with Go modules, as well as performing clean abstractions using interfaces. You'll learn how code works and the common pitfalls to watch out for. The book covers basic type and error handling, and then moves on to explore applications, such as websites, command-line tools, and filesystems, that interact with users. You'll even get to grips with parallelism, distributed systems, and performance tuning. By the end of the book, you'll be able to use open source code and concepts in Go programming to build enterprise-class applications without any hassle.
Table of Contents (16 chapters)

Executing parallel and async client requests

Performing client requests in parallel is relatively simple in Go. In the following recipe, we'll use a client to retrieve multiple URLs using Go buffered channels. Responses and errors will both go to a separate channel that is readily accessible by anyone with access to the client.

In the case of this recipe, creating the client, reading the channels, and handling responses and errors will all be done in the main.go file.

How to do it...

These steps cover writing and running of your application:

  1. From your Terminal or console application, create a new directory called ~/projects/go-programming-cookbook/chapter7/async, and navigate to this directory.
  1. Run the following command:
          $ go mod init github.com/PacktPublishing/Go-Programming-Cookbook-Second-Edition/chapter7/async

You should see a file calledgo.modcontaining...