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strophe.jingle

strophe.jingle is a webrtc connection plugin for strophe.js. Strophe is a popular library for writing XMPP client applications that run on any of the current popular browsers. Instead of the native TCP binding, strophe.js uses BOSH (Bidirectional-streams Over Synchronous HTTP, a variant of long polling) to connect to an XMPP server. Besides enabling anyone to build (federated) IM applications, this opens up the browser as an addressable endpoint for two-way exchange of structured messages, including presence and publish-subscribe applications.

This plugin makes it possible to negotiate audio/video streams via XMPP and then relinquish control to the WebRTC support of browsers like Firefox and Chrome for the actual out-of-band media streams. XMPP/Jingle you get the authenticated, secured and federated media signaling, whereas WebRTC gives you an API to set up the media streams using RTP/ICE/STUN and provide access to cameras and microphones.

The "Silo-Free WebRTC" talk from the 2013 Realtime Conference explains this very well. The XMPP specific part starts around 17:00.

Features:

  • mostly standards-compliant jingle, mapping from WebRTCs SDP to Jingle and vice versa. Aiming for full compliance with XEPs 0166, 0167, 0293, 0294 and 0320.
  • tested with chrome and firefox.
  • interoperable with stanza.io.
  • trickle and non-trickle modes for ICE (XEP-0176). Even supports early candidates from peer using PRANSWER.
  • support for fetching time-limited STUN/TURN credentials through XEP-0215. rfc5766-turn-server is a TURN server which implements this method.
  • comes with a sample demonstrating the use of this to build a federated multi-user conference (in full-mesh mode). When hark is available, the local audio volume is visualized (in Chrome M29+).
  • the jingle-interop-demos repository also contains a sample of 1-1 chat.

Events:

  • callincoming.jingle (sid) -- you should accept the session here
  • callterminated.jingle (sid)
  • nostuncandidates.jingle (sid)
  • remotestreamadded.jingle (event, sid)
  • remotestreamremoved.jingle (event, sid)
  • iceconnectionstatechange.jingle (sid, session)
  • mediaready.jingle (stream)
  • mediafailure.jingle
  • ringing.jingle (sid)
  • mute.jingle (sid, content)
  • unmute.jingle (sid, content)
  • ack.jingle (sid, ack)
  • error.jingle (sid, error)
  • packetloss.jingle (sid, loss) -- percentage of packets lost

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webrtc connection plugin for strophe.js

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