sudhirj/satellite.old

Message broadcasting using SSE

Satellite

Go app to broadcast messages to all connected web clients using SSE and Redis PubSub

Installation

Or:

1. Install Redis - http://redis.io/download
2. go get github.com/runway7/satellite

Configuration

1. TOKEN: An authentication token that you'll use you broadcast a message
2. REDIS_URL: The URL of your Redis installation
3. REDIS_URL_KEY: If you use a hosting provider that sets your Redis URL environment variable under another name, like REDIGO_URL, set this to the name of the variable.

Subscribe to a channel / Listen for messages

Create a GET request to /channel

Broadcast a message

Create a POST request to /channel with token and message as parameters values. Channels that do not exist are created on the fly.

Satellite app uses Strobe for channel fan-out, Redigo to pass messages between servers, and SSE for SSE formatting.

satellite.old's Issues

Add cleanup / housekeeping to get rid of strobes that don't have listeners any more

Probably use a defer to check if there are zero listeners left and delete the strobe. Need to be careful about the locks involved, though.

Message size and buffering

Since writes in the antenna need to be extremely fast, either limit message size to 4k minus padding or use a bytes.buffer to send messages, maybe drain on schedule in the for select.