Book Image

Mastering Go – Third Edition - Third Edition

By : Mihalis Tsoukalos
5 (2)
Book Image

Mastering Go – Third Edition - Third Edition

5 (2)
By: Mihalis Tsoukalos

Overview of this book

Mastering Go is the essential guide to putting Go to work on real production systems. This freshly updated third edition includes topics like creating RESTful servers and clients, understanding Go generics, and developing gRPC servers and clients. Mastering Go was written for programmers who want to explore the capabilities of Go in practice. As you work your way through the chapters, you’ll gain confidence and a deep understanding of advanced Go concepts, including concurrency and the operation of the Go Garbage Collector, using Go with Docker, writing powerful command-line utilities, working with JavaScript Object Notation (JSON) data, and interacting with databases. You’ll also improve your understanding of Go internals to optimize Go code and use data types and data structures in new and unexpected ways. This essential Go programming book will also take you through the nuances and idioms of Go with exercises and resources to fully embed your newly acquired knowledge. With the help of Mastering Go, you’ll become an expert Go programmer by building Go systems and implementing advanced Go techniques in your projects.
Table of Contents (17 chapters)
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Uploading and downloading binary files

It is not unusual to need to store binary files in a RESTful server and being able to download them afterward—for example, for developing photo libraries or document libraries. This section illustrates how to implement that functionality.

For reasons of simplicity, the example is going to be included in the mactsouk/rest-api GitHub repository used earlier for implementing the RESTful server. For this subsection, we are going to be using the file directory to store the relevant code, which is saved as binary.go. In reality, binary.go is a small RESTful server that only supports the uploading and downloading of binary files through the /files/ endpoint.

There exist three main ways to save the files you upload:

  • On the local filesystem
  • On a database management system that supports the storing of binary files
  • On the cloud using a cloud provider

In our case, we are storing the files on the filesystem the...