如何让网络音频或本地音频文件发布到频道中

const config = {    appid: appid, // 这里填写前面 "前提条件" 里面获取到的appid    channel: '505050', // 频道号    uid: 'web' + Math.floor(Math.random() * 2021428) // 随机生成的用户id};var client = null; // 本地客户端对象

const urlButton = document.getElementsByTagName('span')[0];const fileButton = document.getElementsByTagName('span')[1];const urlInput = document.getElementsByTagName('input')[0];const fileInput = document.getElementsByTagName('input')[1];const join = document.getElementsByTagName('p')[0];

// 网络音频urlButton.onclick = () => {    // http://music.163.com/song/media/outer/url?id=1811921555.mp3    // 为了节省大家的时间，笔者这里给大家准备了一个网络音频资源    // 大家可以把上面的链接放到浏览器地址栏访问一下，然后浏览器地址栏的地址会发生变化    // 然后把改变后的浏览器地址栏地址复制到input框里面    const source = urlInput.value;    if (source) {        publishAndPlay(source);    } else {        alert('请输入网络mp3链接');    }};
// 本地音频文件fileButton.onclick = () => {    const source = fileInput.files[0];    if (source) {        publishAndPlay(source);    } else {        alert('请选择音频文件');    }};
// 加入房间的逻辑本来是可以初始化的时候就自动做的// 但是由于谷歌浏览器不允许自动播放音频（必须要用户和页面发生交互才能播放）, 所以才加上点击加入房间的步骤；// 这是为了远端用户能自动播放join.onclick = () => {    const { appid, channel, uid } = config;    // 加入频道    client.join(appid, channel, null, uid).then(() => {        // 一些样式操作        urlButton.parentNode.style.display = 'flex';        fileButton.parentNode.style.display = 'flex';        join.style.display = 'none';    }, () => {        alert('加入房间失败');    });};

const publishAndPlay = async (source) => {    const bufferAudioOptions = {source};    // 通过音频文件或者 AudioBuffer 对象创建一个音频轨道。    const track = await ArRTC.createBufferSourceAudioTrack(bufferAudioOptions);    // 本地播放音频 (必须)    track.play();    // 启动进程音频缓冲 (必须)    track.startProcessAudioBuffer();    // 发布到频道中 (到这里远端用户(确保已加入频道)和本地都能听见声音了)    client.publish(track);};

const init = () => {    client = ArRTC.createClient({ mode: "rtc", codec: "h264" });    // 监听用户发布音视频流    client.on("user-published", async (user, mediaType) => {        await client.subscribe(user, mediaType);        if (mediaType === 'audio') {            user.audioTrack.play();        }    });};init();

<div class='main'>    <p class='join'>加入房间</p>    <div class='url-box'>        <input type="text" placeholder="输入网络mp3链接">        <span class='button'>采集音频</span>    </div>    <div class='file-box'>        <input type="file">        <span class='button'>采集音频</span>    </div></div><script src="/<YOUR_PATH>/to/ArRTC@latest.js"></script><script src="index.js"></script>

.main {    display: flex;    justify-content: space-between;    width: 500px;    margin: 50px auto;}
.main .join {    position: fixed;    top: 50%;    left: 50%;    width: 100px;    line-height: 34px;    border-radius: 4px;    text-align: center;    color: #fff;    font-size: 12px;    background-color: #409EFF;    cursor: pointer;    transform: translate(-50px, -17px);    transition: .3s;}
.main .join:hover {    background-color: #66B1FF;}
.main .url-box, .file-box {    display: none;    height: 80px;    justify-content: space-between;    flex-direction: column;    margin-bottom: 40px;}
.main .button {    display: inline-block;    width: 80px;    line-height: 26px;    border-radius: 2px;    text-align: center;    color: #fff;    font-size: 12px;    background-color: #409EFF;    cursor: pointer;}

const urlButton = document.getElementsByTagName('span')[0];const fileButton = document.getElementsByTagName('span')[1];const urlInput = document.getElementsByTagName('input')[0];const fileInput = document.getElementsByTagName('input')[1];const join = document.getElementsByTagName('p')[0];
const config = {    appid: '',    channel: '505050',    uid: 'web' + Math.floor(Math.random() * 2021428)};
var client = null;
urlButton.onclick = () => {    const source = urlInput.value;    if (source) {        publishAndPlay(source);    } else {        alert('请输入网络mp3链接');    }};
fileButton.onclick = () => {    const source = fileInput.files[0];    if (source) {        publishAndPlay(source);    } else {        alert('请选择音频文件');    }};
join.onclick = () => {    const { appid, channel, uid } = config;    client.join(appid, channel, null, uid).then(() => {        urlButton.parentNode.style.display = 'flex';        fileButton.parentNode.style.display = 'flex';        join.style.display = 'none';    }, () => {        alert('加入房间失败');    });};
const publishAndPlay = async (source) => {    const bufferAudioOptions = {source};    const track = await ArRTC.createBufferSourceAudioTrack(bufferAudioOptions);    track.play();    track.startProcessAudioBuffer();    client.publish(track);};
const init = () => {    client = ArRTC.createClient({ mode: "rtc", codec: "h264" });    client.on("user-published", async (user, mediaType) => {        await client.subscribe(user, mediaType);        if (mediaType === 'audio') {            user.audioTrack.play();        }    });};
init();