//client.js部分代码
'use strict';
var videoplay = document.querySelector('video#player')
function gotMediaStream (stream){
videoplay.srcObject = stream;
}
function handleError (err){
console.log(err);
}
if( !navigator.mediaDevices || !navigator.mediaDevices.getUserMedia ){
console.log('getUserMedia is not support!')
}else{
var constraints = {
video : true,
audio : true
}
navigator.mediaDevices.getUserMedia(constraints)
.then(gotMediaStream)
.catch(handleError);
}