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You're reading from Go: Design Patterns for Real-World Projects Build production-ready solutions in Go using cutting-edge technology and techniques

Product type Course

Published in Jun 2017

Publisher Packt

ISBN-13 9781788390552

Length 1091 pages

Edition 1st Edition

Languages

Concepts

Design Patterns

Authors (3):

Mario Castro Contreras

Mat Ryer

Vladimir Vivien

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Table of Contents (38) Chapters

Go: Design Patterns for Real-World Projects

Credits

Preface

Bibliography

1. A First Step in Go FREE CHAPTER

2. Go Language Essentials

3. Go Control Flow

4. Data Types

5. Functions in Go

6. Go Packages and Programs

7. Composite Types

8. Methods, Interfaces, and Objects

9. Concurrency

10. Data IO in Go

11. Writing Networked Services

12. Code Testing

13. Ready... Steady... Go!

14. Creational Patterns - Singleton, Builder, Factory, Prototype, and Abstract Factory Design Patterns

15. Structural Patterns - Composite, Adapter, and Bridge Design Patterns

16. Structural Patterns - Proxy, Facade, Decorator, and Flyweight Design Patterns

17. Behavioral Patterns - Strategy, Chain of Responsibility, and Command Design Patterns

18. Behavioral Patterns - Template, Memento, and Interpreter Design Patterns

19. Behavioral Patterns - Visitor, State, Mediator, and Observer Design Patterns

20. Introduction to Gos Concurrency

21. Concurrency Patterns - Barrier, Future, and Pipeline Design Patterns

22. Concurrency Patterns - Workers Pool and Publish/Subscriber Design Patterns

23. Chat Application with Web Sockets

24. Adding User Accounts

25. Three Ways to Implement Profile Pictures

26. Command-Line Tools to Find Domain Names

27. Building Distributed Systems and Working with Flexible Data

28. Exposing Data and Functionality through a RESTful Data Web Service API

29. Random Recommendations Web Service

30. Filesystem Backup

31. Building a Q&A Application for Google App Engine

32. Micro-services in Go with the Go kit Framework

33. Deploying Go Applications Using Docker

1. Good Practices for a Stable Go Environment

Chapter 3. Three Ways to Implement Profile Pictures

So far, our chat application has made use of the OAuth2 protocol to allow users to sign in to our application so that we know who is saying what. In this chapter, we are going to add profile pictures to make the chatting experience more engaging.

We will look at the following ways to add pictures or avatars alongside the messages in our application:

Using the avatar picture provided by the auth service
Using the https://en.gravatar.com/ web service to look up a picture by the user's e-mail address
Allowing the user to upload their own picture and host it themselves

The first two options allow us to delegate the hosting of pictures to a third party either an authorization service or https://en.gravatar.com/ which is great because it reduces the cost of hosting our application (in terms of storage costs and bandwidth, since the user's browsers will actually download the pictures from the servers of the authenticating service, not ours). The third...

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You're reading from Go: Design Patterns for Real-World Projects Build production-ready solutions in Go using cutting-edge technology and techniques

Table of Contents (38) Chapters

Chapter 3. Three Ways to Implement Profile Pictures

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Authors (3)

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