Book Image

Python Programming Blueprints

By : Daniel Furtado, Marcus Pennington
Book Image

Python Programming Blueprints

By: Daniel Furtado, Marcus Pennington

Overview of this book

Python is a very powerful, high-level, object-oriented programming language. It's known for its simplicity and huge community support. Python Programming Blueprints will help you build useful, real-world applications using Python. In this book, we will cover some of the most common tasks that Python developers face on a daily basis, including performance optimization and making web applications more secure. We will familiarize ourselves with the associated software stack and master asynchronous features in Python. We will build a weather application using command-line parsing. We will then move on to create a Spotify remote control where we'll use OAuth and the Spotify Web API. The next project will cover reactive extensions by teaching you how to cast votes on Twitter the Python way. We will also focus on web development by using the famous Django framework to create an online game store. We will then create a web-based messenger using the new Nameko microservice framework. We will cover topics like authenticating users and, storing messages in Redis. By the end of the book, you will have gained hands-on experience in coding with Python.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Dedication
Contributors
Packt Upsell
Preface
Index

Chapter 5. Building a Web Messenger with Microservices

In today's application development world, Microservices have become the standard in designing and architecting distributed systems. Companies like Netflix have pioneered this shift and revolutionized the way in which software companies operate, from having small autonomous teams to designing systems that scale with ease.

In this chapter, I will guide you through the process of creating two microservices that will work together to make a messaging web application that uses Redis as a datastore. Messages will automatically expire after a configurable amount of time, so for the purpose of this chapter, let's call it TempMessenger.

In this chapter, we will cover the following topics:

  • What is Nameko?
  • Creating your first Nameko microservice
  • Storing messages
  • Nameko Dependency Providers
  • Saving messages
  • Retrieving all messages
  • Displaying messages in the web browser
  • Sending messages via POST requests
  • Browser polling for messages