请求

if (wsinit == 0) {
    var url = "http://localhost:8090/vmp/dvDevice/getAudioUrl?id=34020000001320000002@34020000001320000002&format=flv&transporttype=udp";
    var request = new XMLHttpRequest();
    request.open("POST", url, false);
    request.setRequestHeader('Access-Control-Allow-Headers', '*');
    request.setRequestHeader("Access-Control-Allow-Origin", '*');

    request.send(null);
    var obj = JSON.parse(request.responseText);
    var port = obj["TransportPort"];
    var pushUrl = "ws://127.0.0.1:12345/cgmedia/websocket/pushaudiostream?id=34020000001320000002@34020000001320000002&transportport=";
    pushUrl += port;
    pushUrl += "&format=mp3";

    wsinit = 1;
}