EventSource server backed by Redis PubSub
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espubsub_server
README.md
espubsub.go
espubsub_test.go

README.md

Easily send messages downstream to a web browser on dedicated channels.

Redis backed Pub/Sub EventSource server

ESPubSub is a Go HTTP Handler which allows clients to subscribe to channels via EventSource. Event Source is a simple browser api for reading from a long poll connection. All common browsers, except IE and Android mobile, support it. See the poyfills for unsupported browsers.

Channels receive data (strings) via a Redis PUBLISH command. ESPubSub will need to connect to a running Redis server.

Demo

git clone git@github.com:jweir/espubsub.git
cd espubsub/server
go run espubsub_server.go

Connect to http://localhost:8080/ with your browser

From the command line send Redis PUBLISH commands

redis-cli PUBLISH /events/alpha "Hello Alpha"
redis-cli PUBLISH /events/beta "`date`"

The demo shows has one channel(/events/*) using a glob to listen to multiple channels.

Polyfills

Some EventSource polyfills for unsupported browsers

https://github.com/remy/polyfills/blob/master/EventSource.js

https://github.com/Yaffle/EventSource

Made Possible By

http://github.com/antage/eventsource and http://github.com/vmihailenco/redis

LICENSE

Copyright (c) 2012 John Weir

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.