This repository contains code from the Distributed websocket chat in 40 lines of code blog post. It is powered by Crystal, Onyx Framework and Redis.

⚠️ NOTE: The application requires Redis version >= 5!

Installation

0. Install Crystal. See the installation instructions.

1. Clone the repository:

> git clone https://github.com/vladfaust/onyx-40-loc-distributed-chat && \
cd onyx-40-loc-distributed-chat

2. Install dependenies:

> shards install

3. Run the server:

> env REDIS_URL=<YOUR_REDIS_5_URL> PORT=5000 crystal src/server.cr

4. Test the server with wscat:

> wscat --connect localhost:5000?username=Alice
> Hi
< Alice: Hi
>

5. Repeat steps 3 and 4 with another PORT to see the distribution in action.

Contributors

• Vlad Faust - creator and maintainer

Licensing

This software is licensed under MIT License.