What is a backend channel?

The channel backend, which is a combination of pluggable Python code and a datastore (e.g. Redis, or a shared memory segment) responsible for transporting messages . The workers, that listen on all relevant channels and run consumer code when a message is ready.

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How do Django channels work?

With WebSockets (via Django Channels) managing the communication between the client and the server, whenever a user is authenticated, an event will be broadcasted to every other connected user . Each user’s screen will change automatically, without them having to reload their browsers.

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What is Django channels used for?

Django Channels facilitates support of WebSockets in Django in a manner similar to traditional HTTP views . It wraps Django’s native asynchronous view support, allowing Django projects to handle not only HTTP, but also protocols that require long-running connections, such as WebSockets, MQTT, chatbots, etc.

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Why Django channels need Redis?

The primary purpose of redis in django-channel_layers is to store the necessary information required for different instances of consumers to communicate with one another . For example, in the tutorial section of channels documentation, it is clear that Redis is used as a storage layer for channel names and group names.

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How does Django channels use Redis?

channels_redis is the only official Django-maintained channel layer supported for production use. The layer uses Redis as its backing store , and supports both a single-server and sharded configurations, as well as group support. To use this layer you’ll need to install the channels_redis package.

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