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视频缓存框架

一个 Swift 版本的 m3u8 视频缓存框架，实现了边播放边缓存，按需缓存，并支持解析嵌套的 m3u8 索引文件。

如何使用

  1. 在 AppDelegate 中启动代理服务器

    M3U8VideoCache.proxyStart()

    如果不使用缓存，也可以停止代理服务器

    M3U8VideoCache.proxyStop()

  2. 生成代理请求的视频链接

    let url = M3U8VideoCache.getProxyUrl(URL(string: link)!)

    完整代码如下所示：

    let link = "https://test-streams.mux.dev/x36xhzz/x36xhzz.m3u8"
if let url = M3U8VideoCache.getProxyUrl(URL(string: link)!) {
    let playerVC = AVPlayerViewController()
    playerVC.player = AVPlayer(playerItem: AVPlayerItem(url: url))
    present(playerVC, animated: true)
}

  3. 如上面的代码中，将生成的代理链接放入 AVPlyaer 中进行播放

  4. 获取缓存大小

    VideoCacheManager.shared.getCacheSize { size, sizeString in
    // size UInt64 类型，文件大小
    // sizeString 格式化之后的文件大小字符串
}

  5. 清除所有的缓存

    VideoCacheManager.shared.clearAll()

原理

  1. 使用 GCDWebServer 在本地开启一个代理服务器
  2. 用原始视频链接生成一个请求代理服务器的链接，然后交给播放器进行播放
  3. 代理服务器拦截到播放器的请求就进行重定向，然后缓存重定向之后结果，下次使用相同的链接就会从缓存中读取结果

第三方框架

  1. GCDWebServer

下一步

兼容 mp4 视频的缓存

许可协议

MIT License

Copyright (c) 2023 Stan

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.