nginx-module-nchan - Scalable, flexible pub/sub server for the modern web
Nchan is a scalable, flexible pub/sub server for the modern web, built as a module for the NGINX web server. It can be configured as a standalone server, or as a shim between your application and hundreds, thousands, or millions of live subscribers. It can buffer messages in memory, on-disk, or via Redis. Messages are published to channels with HTTP POST requests or Websocket, and subscribed also through Websocket, long-polling, EventSource (SSE), old-fashioned interval polling, and more. In a web browser, you can use Websocket or EventSource natively, or the NchanSubscriber.js wrapper library. It supports Long-Polling, EventSource, and resumable Websockets, and has a few other added convenience options. It's also available on NPM.
How to Install
sudo yum -y install https://extras.getpagespeed.com/release-latest.rpm yum-utils sudo yum-config-manager --enable getpagespeed-extras-mainline sudo yum -y install nginx-module-nchan