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icomet

A C1000K comet/push server built with libevent.

iComet is powerfull, can be used as the messaging server of many applications, such as web chat, mobile application, desktop application etc.

iComet provides a easy-to-use JavaScript library, with iComet js lib, you can build a web app that needs server-push feature very fast.

iComet's role in web system and mobile system

icomet's role

Compile and Run

wget --no-check-certificate https://github.com/ideawu/icomet/archive/master.zip
unzip master.zip
cd icomet-master/
make
./comet-server icomet.conf
# stop
./comet-server icomet.conf -s stop

curl -v "http://127.0.0.1:8100/sub?cname=12"
# open another terminal
curl -v "http://127.0.0.1:8000/push?cname=12&content=hi"

JavaScript Library Usage

var comet = new iComet({
    channel: 'abc',
    signUrl: 'http://127.0.0.1:8000/sign',
    subUrl: 'http://127.0.0.1:8100/sub',
    callback: function(content){
        // on server push
        alert(content);
    }
});

Supported Platforms and Browsers

Browser Platform
Safari iOS(iPhone, iPod, iPad), Mac
Firefox Windows, Mac
Chrome Windows, Mac
IE6, IE8 Windows

Java/Android API

Memory Usage

Connections VIRT RES
0 39m 24m
100,000 302m 288m
200,000 579m 565m
500,000 1441m 1427m
1,000,000 2734m 2720m

2.7KB per connection.

Run the chat demo

  1. Compile and start icomet server
  2. Drag and drop the file demo/web/chat.html into one web browser
  3. Drag and drop the file demo/web/chat.html into another different web browser
  4. Start chatting!

Live demo

This live demo is based on https://github.com/ideawu/icomet-demos, which has buddy list, chat history, and other features.

http://www.ideawu.com/icomet/chat.html

Nginx + icomet

You can integrate icomet with nginx. If you are running you website on port 80 with domain www.test.com. That is you visit your website home page with this url:

http://www.test.com/

Then you want to run icomet on the same server with port 80, for the concern of firewall issue. You can config nginx to pass request to icomet:

location ~ ^/icomet/.* {
	rewrite ^/icomet/(.*) /$1 break;

	proxy_read_timeout 60;
	proxy_connect_timeout 60;
	proxy_buffering off;
	proxy_pass   http://127.0.0.1:8100;
}

Then, this url is used to subscribe to icomet channel xxx:

http://www.test.com/icomet/sub?cname=xxx

Misc

icomet 源码分析