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<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>HTTPMediaCache Architecture</title>
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<h1>HTTPMediaCache Architecture</h1>
<p class="subtitle">Swift-only local HTTP media cache: proxy playback, preload, HLS rewrite, byte range storage.</p>
</div>
<div class="status"><span class="pulse"></span>1.0.2 public API surface</div>
</header>
<section class="diagram-card" aria-label="HTTPMediaCache architecture diagram">
<svg viewBox="0 0 1120 760" role="img" aria-labelledby="title desc" xmlns="http://www.w3.org/2000/svg">
<title id="title">HTTPMediaCache module architecture</title>
<desc id="desc">Architecture diagram showing app, API, runtime, proxy, HLS, pipeline, storage, and network modules.</desc>
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<text x="117" y="102" fill="#fbbf24" font-size="11" font-weight="600" text-anchor="middle">Consumers</text>
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<text x="100" y="166" fill="#fff" font-size="12" font-weight="600" text-anchor="middle">App / AVPlayer</text>
<text x="100" y="184" fill="#94a3b8" font-size="9" text-anchor="middle">proxyURL playback</text>
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<text x="390" y="100" fill="#fff" font-size="12" font-weight="600" text-anchor="middle">API</text>
<text x="390" y="119" fill="#94a3b8" font-size="9" text-anchor="middle">HTTPMediaCache</text>
<text x="390" y="134" fill="#94a3b8" font-size="9" text-anchor="middle">CacheRequest / Options</text>
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<text x="895" y="100" fill="#fff" font-size="12" font-weight="600" text-anchor="middle">Proxy</text>
<text x="895" y="119" fill="#94a3b8" font-size="9" text-anchor="middle">NIOProxyServer</text>
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<text x="635" y="280" fill="#94a3b8" font-size="9" text-anchor="middle">FilePreloadExecutor</text>
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<text x="635" y="637" fill="#94a3b8" font-size="9" text-anchor="middle">URLSessionDownloader</text>
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</section>
<section class="cards">
<article class="card">
<div class="card-header"><span class="card-dot" style="background: var(--emerald)"></span><h3>入口层</h3></div>
<ul>
<li>• `HTTPMediaCache` 暴露播放、预加载、查询与清理入口</li>
<li>• `CacheRuntime` 持有代理、存储、下载器和 HLS 策略</li>
<li>• Example 与 XCTest 均通过公开 API 验证行为</li>
</ul>
</article>
<article class="card">
<div class="card-header"><span class="card-dot" style="background: var(--cyan)"></span><h3>数据链路</h3></div>
<ul>
<li>• Proxy 路由播放器请求，按 HLS 与普通媒体分流</li>
<li>• Pipeline 将请求拆成本地缓存段和远端下载段</li>
<li>• Storage 记录缓存区间并落盘到本地文件</li>
</ul>
</article>
<article class="card">
<div class="card-header"><span class="card-dot" style="background: var(--rose)"></span><h3>HLS 边界</h3></div>
<ul>
<li>• Playlist 缓存原始内容，播放侧按需改写代理 URL</li>
<li>• key、init map、segment 使用独立下载策略</li>
<li>• 预加载复用同一套选择、下载和缓存策略</li>
</ul>
</article>
</section>
<footer>Generated for HTTPMediaCache 1.0.2 documentation.</footer>
</main>
</body>
</html>