ShareJS

This is a little server (& client library) to allow concurrent editing of any kind of content. The server runs on NodeJS and the client works in NodeJS or a web browser.

ShareJS currently supports operational transform on plain-text and arbitrary JSON data.

Immerse yourself in API Documentation.

Visit Google groups for discussions and announcements

Check out the live interactive demos.

Note: CI sometimes breaks for random reasons even though the tests work locally. Don't stress!

Browser support

ShareJS should work with all of them

That said, I only test regularly with FF, Safari and Chrome, and occasionally with IE8+. File bug reports if you have issues

Installing and running

# npm install share

Run the examples with:

# sharejs-exampleserver

If you want redis support, you'll need to install redis:

# sudo brew install redis
# npm install -g redis

From source

Install redis (optional)

• Mac:

    # sudo brew install redis
  

• Linux:

    # sudo apt-get install redis
  

Then:

# git clone git://github.com/josephg/ShareJS.git
# cd ShareJS
# npm install redis   # If you want redis support
# npm link

Run the tests:

# cake test

Build the coffeescript into .js:

# cake build
# cake webclient

Run the example server:

# bin/exampleserver

Running a server

There are two ways to run a sharejs server:

1. Embedded in a node.js server app:

   var connect = require('connect'),
       sharejs = require('share').server;
   
   var server = connect(
         connect.logger(),
         connect.static(__dirname + '/my_html_files')
       );
   
   var options = {db: {type: 'memory'}}; // See docs for options. {type: 'redis'} to enable persistance.
   
   // Attach the sharejs REST and Socket.io interfaces to the server
   sharejs.attach(server, options);
   
   server.listen(8000);
   console.log('Server running at http://127.0.0.1:8000/');

   The above script will start up a ShareJS server on port 8000 which hosts static content from the my_html_files directory. See bin/exampleserver for a more complex configuration example.

   See the Connect or Express documentation for more complex routing.

2. From the command line:

    # sharejs
   

   Configuration is pulled from a configuration file that can't be easily edited at the moment. For now, I recommend method #1 above.

3. If you are just mucking around, run:

    # sharejs-exampleserver
   

   This will run a simple server on port 8000, and host all the example code there. Run it and check out http://localhost:8000/ . The example server stores everything in ram, so don't get too attached to your data.

   If you're running sharejs from source, you can launch the example server by running bin/exampleserver.

Putting Share.js on your website

If you want to get a simple editor working in your webpage with sharejs, here's what you need to do:

First, get an ace editor on your page:

<div id="editor"></div>

Your web app will need access to the following JS files:

• Ace (http://ace.ajax.org/)
• SocketIO (http://socket.io/).
• ShareJS client and ace bindings.

Add these script tags:

<script src="http://ajaxorg.github.com/ace/build/src/ace.js"></script>
<script src="/socket.io/socket.io.js"></script>
<script src="/share/share.js"></script>
<script src="/share/ace.js"></script>

And add this code:

<script>
    var editor = ace.edit("editor");

    sharejs.open('hello', 'text', function(error, doc) {
        doc.attach_ace(editor);
    });
</script>

NOTE: If you're using the current version in npm (0.4) or earler, the argument order is the other way around (function(doc, error)).

Thats about it :)

The easiest way to get your code running is to check sharejs out from source and put your html and css files in the examples/ directory. Run bin/exampleserver to launch the demo server and browse to http://localhost:8000/your-app.html .

See the wiki for documentation.

Its also possible to use sharejs without ace. See the textarea example for details.

Writing a client using node.js

The client API is the same whether you're using the web or nodejs.

Here's an example application which opens a document and inserts some text in it. Every time an op is applied to the document, it'll print out the document's version.

Run this from a couple terminal windows when sharejs is running to see it go.

var client = require('share').client;

// Open the 'hello' document, which should have type 'text':
client.open('hello', 'text', 'http://localhost:8000/sjs', function(error, doc) {
    // Insert some text at the start of the document (position 0):
    doc.insert("Hi there!\n", 0);

    // Get the contents of the document for some reason:
    console.log(doc.snapshot);

    doc.on('change', function(op) {
        console.log('Version: ' + doc.version);
    });

    // Close the doc if you want your node app to exit cleanly
    // doc.close();
});

NOTE: If you're using the current version in npm (0.4) or earler, the argument order is the other way around (function(doc, error)).

See the wiki for API documentation, and examples/node* for some more example apps.