Creating a Web Chat Service with Python/Django (Feat. Channels) - Basics

A true Djangoholic developer
A lecture that only extracts the core of the channel

Step by step from the basics
Stacking WebSocket Communication

Lecture slides
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All lectures with Korean subtitles
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Rich WebSocket examples :
Echo messages, live blogs, and web chat

1. Channels Main Components

• Let's summarize the core concepts of channels.
  
  

2. (Practice) Super-simple Echo WebSocket Implementation

• By implementing Echo WebSocket with Channels, we open the prelude to learning about the Channels chat service.

3. (Practice) Sending and Receiving JS Objects via WebSocket

• All communication requires serialization and deserialization. We'll examine common mistakes made during serialization in JS and explore JSON serialization and deserialization methods in WebSocket clients and channels.
  
  
  

4. Running and connecting to the Redis server

• We'll explore how to integrate Redis Enterprise Cloud's Free Plan into a Django project, exploring how to register Redis account information as environment variables and efficiently retrieve and process it in Django. Finally, we'll review the command to run a Redis server with Docker.

5. Interprocess communication using the channel layer

• Channels supports inter-process communication through the Channel Layer. Let's examine the types of backends supported by the Channel Layer and summarize its core APIs.

6. (Practice) Web Socket Liveblog

• Let's create a live blog service that responds in real time to server-side blog post additions, edits, and deletions without refreshing the webpage. You'll experience the simple yet powerful power of Django Channels.

7. Data types that can be transmitted to the channel layer

• Serialization and deserialization are essential in all communication. We'll examine the serialization methods used in communication with the channel layer and delve into the serialization constraints imposed by the channel layer.

8. WebSocket Reconnection

• Networks can be disconnected at any time. Even WebSockets, which require persistent connections, can experience disconnections at any time. Let's look at two ways to handle WebSocket reconnections.

9. Inheritance relationship of Consumer class

• In Channels, the subject of request processing is the Consumer. Let's examine the inheritance relationship of the Consumer class provided by Channels and examine each role in detail.
  
  

10. Creating a Real-World Chat Service

• As a core part of this course, we will create a chat service using Django Channels effectively.

11. Security

• Channels supports two middlewares to defend against WebSocket CSRF attacks, a security feature. Let's look at an example of a CSRF attack and learn more about how to configure the two middlewares.