pull-stream source and sink for WebRTC data channels
Pull Stream interfaces for working with WebRTC data channels.
Displayed below is an example that demonstrates how pull-streams can be used in conjunction with the data channel to transmit and receive data via data-channels:
var qc = require'rtc-quickconnect';var pull = require'pull-stream';var observable = require'pull-observable';var dc = require'pull-datachannel';// create a canvas to draw the remote linevar canvas = documentcreateElement'canvas';var context = canvasgetContext'2d';// initialise the canvas height and width and add to the doccanvaswidth = 640;canvasheight = 480;documentbodyappendChildcanvas;// capture the pointer on the documentvar point = require'point'canvas;var lastXY = ;returnvar xy = argsslice0 2;var data = args2;if datatype === 'move'contextstrokeStyle = color;contextbeginPath;contextmoveToapplycontext lastXY;contextlineToapplycontext xy;contextstroke;contextclosePath;// save the last xylastXY = concatxy;return argsslice0 3;;qc'' room: 'pulldc-sharedpointer'createDataChannel'cursor'on'channel:opened:cursor'console.log'data channel opened for peer: ' + peerId;// stream the pointer information across the datachannelpullobservablepointpullmapdrawCursor'#000'pullmapJSONstringifydcwritechannel;// read incoming pointer informationpulldcreadchannelpullmapJSONparsepulldraindrawCursor'#F00';;
NOTE: At this stage, even though I'm sending only text data I am still seeing data-channel exceptions in chrome. I have implemented a short term try / catch block to work around the issue in the short term...
Also if you aren't seeing events across the connection, it's important to note that point is a simple library that captures unified pointer events (mouse and touch) so you will need to click and drag the mouse to create move events.
Create a pull-stream source on a
var qc = require'rtc-quickconnect';var pull = require'pull-stream';var randomName = require'random-name';var dc = require'pull-datachannel';qc'' room: 'pull-dc-read'createDataChannel'test'on'channel:opened:test'console.log'data channel opened for peer: ' + peerId;// when we get data, log itpulldcreadchannelpull.log;sendRandomNameschannel;;setTimeoutchannelsendrandomName;sendRandomNameschannel;Mathrandom * 1000;
Create a pull-stream sink on target data channel.
var qc = require'rtc-quickconnect';var pull = require'pull-stream';var dc = require'pull-datachannel';qc'' room: 'pulldc-write'createDataChannel'test'on'channel:opened:test'console.log'data channel opened for peer: ' + peerId;channeladdEventListener'message'console.log'received data: ' evtdata;;// send some data to the channelpullpullvalues1 2 3 4dcwritechannel;;
Copyright (c) 2015 Damon Oehlman firstname.lastname@example.org
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