请问后台请求的src如何放入hls.js里

Question

var video = document.getElementById('video');
if(Hls.isSupported()) {
var hls = new Hls();
hls.loadSource("http://1252093142.vod2.myqcloud.com/8100044199.m3u8");
hls.attachMedia(video);
hls.on(Hls.Events.MANIFEST_PARSED,function() {
    try {
        video.play();
    } catch (error) {
        console.log(error);
    }
  });
 }

动态的赋值，每次请求后都需要放入