分类 javascript 下的文章

(function () {
  var originalSend = XMLHttpRequest.prototype.send;
  var originalOpen = XMLHttpRequest.prototype.open;

  XMLHttpRequest.prototype.open = function (method, url, async, user, password) {
    this._url = url; // 保存请求 URL，可能在后面用到
    return originalOpen.apply(this, arguments);
  };

  XMLHttpRequest.prototype.send = function (body) {
    this.addEventListener('load', function () {
      if (this.status == 200 && this._url.includes('.m3u8')) {
        // 在这里处理响应
        console.log('Response from:bb ', this._url, 'Status:', this.status);
      }
    });

    return originalSend.apply(this, arguments);
  };
})();

生成加密key

openssl rand  16 > enc.key

生成IV

openssl rand -hex 16

新建enc.keyinfo，内容如下

enc.key
enc.key
191029d9c2d4e9051a8a5deb2f7f5c04

以加密hls.mkv为例

ffmpeg -i hls.mkv \
-codec:v libx264 \
-codec:a mp3 \
-map 0 \
-s 640x360 \
-hls_time 10 \
-hls_list_size 0 \
-hls_allow_cache 1 \
-hls_base_url http://localhost/videos/ \
-hls_segment_filename out%03d.ts \
-hls_key_info_file enc.keyinfo \
playlist.m3u8

新建html测试效果

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Encrypted Video Playback Test</title>
  <!-- Include video.js CSS -->
  <link href="https://vjs.zencdn.net/7.17.0/video-js.css" rel="stylesheet">

  <!-- Include video.js library -->
  <script src="https://vjs.zencdn.net/7.17.0/video.js"></script>
</head>
<body>

<video id="encrypted-video" class="video-js vjs-default-skin" controls width="640" height="360">
  <!-- Include an HLS source (replace with your encrypted m3u8 URL) -->
  <source src="/playlist.m3u8" type="application/x-mpegURL">
</video>

<script>
  // Initialize video.js
  var player = videojs('encrypted-video');

  // Add any additional configurations or event listeners if needed
</script>

</body>
</html>

python -m http.server 1089

const hexString = "68656c6c6f";
const byteArray = Buffer.from(hexString, 'hex');
console.log(byteArray);

由于浏览器不支持Buffer,使用下面的形式

const hexStringToByteArray = function (hexString) {
    const bytes = new Uint8Array(hexString.length / 2);

    for (let i = 0; i < hexString.length; i += 2) {
        bytes[i / 2] = parseInt(hexString.substr(i, 2), 16);
    }

    return bytes;
}

sleep一段时间

var sleep = async function (ms) {
            return new Promise(function (resolve) {
                setTimeout(resolve, ms);
            });
        };

使用

for (var i = 0; i < 10; i++) {
            console.log(i, Date.now());
            await sleep(2000);
        }
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