sethdaniel/holla

An abstraction over P2P video/voice/data connections using WebRTC

Support

holla has full support for Chrome 24+ and Firefox 21+ (Currently Nightly)

Example

Server

var holla = require('holla');
var server = http.createServer().listen(8080);
var rtc = holla.createServer(server);

console.log('Server running on port 8080');

Note: Express 3 is no longer a httpServer so you need to do something like:

var server = require('http').createServer(app).listen(8080);

before passing it to holla.createServer

Client

Sending a call:

var rtc = holla.createClient();

rtc.register("tom", function(worked) {
  holla.createFullStream(function(err, stream) {
    var call = rtc.call("bob");
    call.addStream(stream);
  });
});

Receiving a call:

var rtc = holla.createClient();

rtc.register("bob", function(worked) {
  rtc.on("call", function(call) {

    holla.createFullStream(function(err, stream) {
      call.addStream(stream);
      call.answer();
    });

  });
});

Client

holla

.supported

true or false if WebRTC is supported in the browser

.createClient(options)

Takes some options to specify host (see source) - defaults to window.location.href. Returns an RTC instance

.pipe(stream, el)

Pipes a WebRTC video stream to a video element. el can be a string (id), jquery element, or dom node.

.createStream(opt, cb)

Creates a WebRTC stream - opt looks like {video:true,audio:true} depending on the stream you want. cb signature is (err, stream)

createFullStream(cb)

Sugar for .createStream({video:true,audio:true}, cb)

createVideoStream(cb)

Sugar for .createStream({video:true,audio:false}, cb)

createAudioStream(cb)

Sugar for .createStream({video:false,audio:true}, cb)

RTC

.register(name, cb)

Registers your connection with the server under a name. cb receives true or false if it worked. cb is optional.

.call(name)

Creates a call to user with name. Returns a Call instance

.ready(fn)

fn gets called when connection is registered or if it already has been.

Events

RTC will emit connected, authorized, disconnected, error, presence, and call events.

Call

.isCaller

true or false if you started this call.

.user

Name of the user on the other end.

.startTime

Date of the call start.

.endTime

Date of the call end.

.duration()

Duration of the call.

.addStream(stream)

Adds your WebRTC stream to the call. Must be done before answering or sending a call.

.chat(msg)

Sends a chat message

.answer()

Accepts the call (inbound only)

.decline()

Declines the call (inbound only)

.end()

Ends the call (hangup and close connection)

releaseStream()

Release use of the attached stream. Will make a users webcam light go off so they don't think you're spying.

mute()

Mutes the local user's audio to the remote user

unmute()

Unmutes the local user's audio to the remote user

.ready(fn)

Will call fn when the call has been connected and is ready to go or if it is already.

Events

Call will emit calling, connecting, connected, hangup, and chat events

Examples

You can view more examples in the example folder.

Demo

There is a crappy demo up at holla.jit.su

Adapters (complex use cases)

The holla server comes with a default adapter that uses an in-memory store and no auth to manage users. If you would like to override these preference just pass your overrides as the second object to .createServer(httpServer, {adapter: adapterObject}).

An example adapter that uses redis instead of in-memory might look something like this (pseudo-code)

# assume redis is a node-redis connection

adapter =
  register: (req, cb) ->
    client.hset "users", req.name, req.socket.id, cb

  getId: (name, cb) -> 
    client.hget "users", name (err, id) ->
      cb id

  unregister: (req, cb) ->
    client.hdel "users", req.name, cb

  getPresenceTargets: (req, cb) ->
    # these are the people notified on presence changes
    # this assumes contacts.{name} is a list of names you created somewhere else
    client.get "contacts.#{req.name}", (err, contacts) ->
      cb contacts

Changing the name on register

You can set req.name before calling cb to change the name (useful if you send up a cookie in .register then do a lookup for the real name)

Effects

There is effects.css in the repository with some common CSS classes you will want when dealing with RTC video tags (flip, shadow, reflect, fadein, etc.). These are prefixed with rtc (example: .rtc-flip)

LICENSE

(MIT License)

Copyright (c) 2012 Fractal contact@wearefractal.com

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.