Redis adapter

Every packet that is sent to multiple clients (e.g. or socket.broadcast.emit()) is:

• sent to all matching clients connected to the current server
• published in a Redis channel, and received by the other Socket.IO servers of the cluster

The source code of this adapter can be found here.

Installation

Or with :

Options

• Do I still need to enable sticky sessions when using the Redis adapter?

Yes. Failing to do so will result in HTTP 400 responses (you are reaching a server that is not aware of the Socket.IO session).

More information can be found .

Emitter

The Redis emitter allows sending packets to the connected clients from another Node.js process:

This emitter is also available in several languages:

• Javascript:
• Java: https://github.com/sunsus/socket.io-java-emitter
• Python:
• PHP: https://github.com/rase-/socket.io-php-emitter
• Golang:
• Rust: https://github.com/epli2/socketio-rust-emitter

Usage

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