Go Chat CLI

A simple CLI tool implementing a low level PUB/SUB system in Golang.

This package implements a chat system using a low level PUB/SUB single channel system. This is a simple version having a single channel system, which will be further enhanced later.

The application works as a PUB/SUB system using Goroutines and Channels. The message sent from a client (publisher) is routed to each other client (subscriber) on demand, without storing/persisting and information.

How to run your application

1. Install the application via - go get github.com/shreybatra/go-chat-cli
2. Start the server - go-chat-cli --mode server (default mode is Server only.)
3. Now you can open multiple other terminals and run clients in each - go-chat-cli --mode client
4. You can type any string and send a message to the chat. Each other client except the sender will receive the message.

Configuration

By default, the server application runs on port 12345 and binds only to localhost (127.0.0.1). You can customize this by setting the ENV variables -

• PORT
• HOSTS (eg 0.0.0.0)

For clients, pass the HOSTS as the IP of server application (if on different hosts).

Alternatively, you can also have a .env file in the current directory where you run your servers / clients. Sample .env -

PORT=30080
HOSTS=0.0.0.0

For server, this will bind the server to HOSTS and PORT, whereas the clients would have a different value of the server's IP addr.