{"id":76179,"date":"2026-02-21T21:57:35","date_gmt":"2026-02-21T13:57:35","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/76179.html"},"modified":"2026-02-21T21:57:35","modified_gmt":"2026-02-21T13:57:35","slug":"flutter-for-openharmony%ef%bc%9ashelf_static-%e6%9e%81%e9%80%9f%e6%90%ad%e5%bb%ba%e9%9d%99%e6%80%81%e6%96%87%e4%bb%b6%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%8c%e5%ae%9e%e7%8e%b0%e6%9c%ac%e5%9c%b0%e8%a7%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/76179.html","title":{"rendered":"Flutter for OpenHarmony\uff1ashelf_static \u6781\u901f\u642d\u5efa\u9759\u6001\u6587\u4ef6\u670d\u52a1\u5668\uff0c\u5b9e\u73b0\u672c\u5730\u89c6\u9891\u6d41\u64ad\u653e\uff0c\u6df1\u5ea6\u89e3\u6790\u4e0e\u9e3f\u8499\u9002\u914d\u6307\u5357"},"content":{"rendered":"

\u6b22\u8fce\u52a0\u5165\u5f00\u6e90\u9e3f\u8499\u8de8\u5e73\u53f0\u793e\u533a：https:\/\/openharmonycrossplatform.csdn.net<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u524d\u8a00<\/h3>\n

\u5728 Web \u5f00\u53d1\u4e2d，Nginx\/Apache \u662f\u9759\u6001\u6587\u4ef6\u670d\u52a1\u7684\u9738\u4e3b\u3002\u4f46\u5728 Flutter\/Dart \u5f00\u53d1\u7684\u79fb\u52a8\u5e94\u7528\u6216\u5d4c\u5165\u5f0f\u8bbe\u5907\u4e2d，\u5982\u679c\u6211\u4eec\u9700\u8981\u5c06\u672c\u5730\u6587\u4ef6（\u5982 HTML5 \u79bb\u7ebf\u5305\u3001\u4e0b\u8f7d\u7684\u89c6\u9891\u3001\u65e5\u5fd7\u6587\u4ef6）\u66b4\u9732\u7ed9 WebView \u6216\u5c40\u57df\u7f51\u5176\u4ed6\u8bbe\u5907\u8bbf\u95ee，\u5f15\u5165 Nginx \u663e\u7136\u592a\u91cd\u4e86\u3002<\/p>\n

Shelf \u662f Dart \u5b98\u65b9\u7ef4\u62a4\u7684 Web Server \u6846\u67b6（\u7c7b\u4f3c\u4e8e Node.js \u7684 Express \u6838\u5fc3）\u3002\u800c shelf_static \u5219\u662f\u5176\u5b98\u65b9\u63d0\u4f9b\u7684\u4e2d\u95f4\u4ef6，\u4e13\u95e8\u7528\u4e8e\u5904\u7406\u9759\u6001\u6587\u4ef6\u8bf7\u6c42\u3002\u8fd9\u4e0d\u4ec5\u4ec5\u662f\u7b80\u5355\u7684\u201c\u8bfb\u6587\u4ef6\u8fd4\u56de\u201d，\u5b83\u8fd8\u5904\u7406\u4e86\u7f13\u5b58\u63a7\u5236（Cache-Control）\u3001MIME \u7c7b\u578b\u63a8\u65ad\u3001\u5c24\u5176\u662f Range Request（\u65ad\u70b9\u7eed\u4f20\/\u89c6\u9891\u6d41） \u7b49\u590d\u6742\u534f\u8bae\u7ec6\u8282\u3002<\/p>\n

\u5bf9\u4e8e OpenHarmony \u5f00\u53d1\u8005，\u8fd9\u610f\u5473\u7740\u4f60\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06\u4f60\u7684 App \u53d8\u6210\u4e00\u4e2a\u5fae\u578b Web \u670d\u52a1\u5668，\u65e0\u8bba\u662f\u670d\u52a1\u4e8e\u5185\u7f6e\u7684 ArkWeb \u7ec4\u4ef6，\u8fd8\u662f\u5b9e\u73b0\u8de8\u8bbe\u5907\u6587\u4ef6\u4f20\u8f93\u3002<\/p>\n

\u4e00\u3001\u6838\u5fc3\u539f\u7406\u4e0e HTTP \u534f\u8bae\u6df1\u5ea6\u89e3\u6790<\/h3>\n

1.1 \u9759\u6001\u8d44\u6e90\u54cd\u5e94\u6d41\u7a0b<\/h4>\n

\u5f53\u6d4f\u89c8\u5668\u8bf7\u6c42 GET \/index.html \u65f6，shelf_static \u4f1a\u505a\u4ee5\u4e0b\u51e0\u4ef6\u4e8b：<\/p>\n

  • \u5b89\u5168\u6027\u68c0\u67e5：\u9632\u6b62\u76ee\u5f55\u904d\u5386\u653b\u51fb（\u5982\u8bf7\u6c42 GET \/..\/..\/etc\/passwd）\u3002<\/li>\n
  • \u6587\u4ef6\u67e5\u627e：\u5728\u6307\u5b9a\u7684\u6839\u76ee\u5f55（\u5982 assets\/web）\u67e5\u627e index.html\u3002<\/li>\n
  • MIME Type：\u6839\u636e\u540e\u7f00\u540d（.html -> text\/html）\u8bbe\u7f6e Content-Type\u3002<\/li>\n
  • \u534f\u5546\u7f13\u5b58：\u6bd4\u8f83 Last-Modified \u6216 ETag，\u5982\u679c\u672a\u4fee\u6539\u5219\u8fd4\u56de 304 Not Modified\u3002<\/li>\n

    1.2 Range Request（\u89c6\u9891\u6d41\u7684\u6838\u5fc3）<\/h4>\n

    \u4e3a\u4ec0\u4e48\u7528 shelf_static \u800c\u4e0d\u662f\u81ea\u5df1\u5199 File(path).readAsBytes()？ \u6700\u5173\u952e\u7684\u539f\u56e0\u662f Range \u8bf7\u6c42\u3002<\/p>\n

    \u5f53\u4f60\u62d6\u52a8\u89c6\u9891\u8fdb\u5ea6\u6761\u65f6，\u6d4f\u89c8\u5668\u53d1\u9001\u7684\u8bf7\u6c42\u5934\u5305\u542b： Range: bytes=1000-2000<\/p>\n

    \u670d\u52a1\u5668\u5fc5\u987b\u89e3\u6790\u8fd9\u4e2a\u5934，\u5b9a\u4f4d\u6587\u4ef6\u6307\u9488，\u53ea\u8bfb\u53d6 1000 \u5230 2000 \u5b57\u8282，\u5e76\u8fd4\u56de 206 Partial Content，\u54cd\u5e94\u5934\u5305\u542b： Content-Range: bytes 1000-2000\/50000<\/p>\n

    shelf_static \u5b8c\u7f8e\u5c01\u88c5\u4e86\u8fd9\u4e00\u903b\u8f91\u3002\u5982\u679c\u81ea\u5df1\u5199，\u4f60\u9700\u8981\u5904\u7406\u6781\u5176\u7e41\u7410\u7684\u8fb9\u754c\u60c5\u51b5\u3002<\/p>\n

    #mermaid-svg-LpGIYK8sZ3laJcKs{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-LpGIYK8sZ3laJcKs .error-icon{fill:#552222;}#mermaid-svg-LpGIYK8sZ3laJcKs .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-LpGIYK8sZ3laJcKs .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-LpGIYK8sZ3laJcKs .marker{fill:#333333;stroke:#333333;}#mermaid-svg-LpGIYK8sZ3laJcKs .marker.cross{stroke:#333333;}#mermaid-svg-LpGIYK8sZ3laJcKs svg{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-LpGIYK8sZ3laJcKs p{margin:0;}#mermaid-svg-LpGIYK8sZ3laJcKs .label{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;color:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs .cluster-label text{fill:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs .cluster-label span{color:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs .cluster-label span p{background-color:transparent;}#mermaid-svg-LpGIYK8sZ3laJcKs .label text,#mermaid-svg-LpGIYK8sZ3laJcKs span{fill:#333;color:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs .node rect,#mermaid-svg-LpGIYK8sZ3laJcKs .node circle,#mermaid-svg-LpGIYK8sZ3laJcKs .node ellipse,#mermaid-svg-LpGIYK8sZ3laJcKs .node polygon,#mermaid-svg-LpGIYK8sZ3laJcKs .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-LpGIYK8sZ3laJcKs .rough-node .label text,#mermaid-svg-LpGIYK8sZ3laJcKs .node .label text,#mermaid-svg-LpGIYK8sZ3laJcKs .image-shape .label,#mermaid-svg-LpGIYK8sZ3laJcKs .icon-shape .label{text-anchor:middle;}#mermaid-svg-LpGIYK8sZ3laJcKs .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-LpGIYK8sZ3laJcKs .rough-node .label,#mermaid-svg-LpGIYK8sZ3laJcKs .node .label,#mermaid-svg-LpGIYK8sZ3laJcKs .image-shape .label,#mermaid-svg-LpGIYK8sZ3laJcKs .icon-shape .label{text-align:center;}#mermaid-svg-LpGIYK8sZ3laJcKs .node.clickable{cursor:pointer;}#mermaid-svg-LpGIYK8sZ3laJcKs .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-LpGIYK8sZ3laJcKs .arrowheadPath{fill:#333333;}#mermaid-svg-LpGIYK8sZ3laJcKs .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-LpGIYK8sZ3laJcKs .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-LpGIYK8sZ3laJcKs .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-LpGIYK8sZ3laJcKs .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-LpGIYK8sZ3laJcKs .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-LpGIYK8sZ3laJcKs .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-LpGIYK8sZ3laJcKs .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-LpGIYK8sZ3laJcKs .cluster text{fill:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs .cluster span{color:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-LpGIYK8sZ3laJcKs .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-LpGIYK8sZ3laJcKs rect.text{fill:none;stroke-width:0;}#mermaid-svg-LpGIYK8sZ3laJcKs .icon-shape,#mermaid-svg-LpGIYK8sZ3laJcKs .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-LpGIYK8sZ3laJcKs .icon-shape p,#mermaid-svg-LpGIYK8sZ3laJcKs .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-LpGIYK8sZ3laJcKs .icon-shape rect,#mermaid-svg-LpGIYK8sZ3laJcKs .image-shape rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-LpGIYK8sZ3laJcKs .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-LpGIYK8sZ3laJcKs .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-LpGIYK8sZ3laJcKs :root{–mermaid-font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;}<\/p>\n

    <\/p>\n

    GET \/video.mp4 Range:0-1MB<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u89e3\u6790\u8bf7\u6c42\u5934 (Parse Header)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u6253\u5f00\u6587\u4ef6 (Open File)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u5b9a\u4f4d\u5e76\u8bfb\u53d6 (Seek & Read)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    206 \u90e8\u5206\u5185\u5bb9\u54cd\u5e94 (206 Partial Content)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u6d4f\u89c8\u5668 (WebView\/Browser)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    Shelf \u670d\u52a1\u5668<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u9759\u6001\u5904\u7406\u5668 (shelf_static)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u6587\u4ef6\u7cfb\u7edf (File System)<\/p>\n

    <\/span><\/p>\n

    <\/p>\n

    \u6570\u636e\u5757 (Data Chunk)<\/p>\n

    <\/span><\/p>\n

    \u4e8c\u3001\u6838\u5fc3 API \u8be6\u89e3<\/h3>\n

    2.1 \u57fa\u7840\u7528\u6cd5：\u66b4\u9732\u6574\u4e2a\u76ee\u5f55<\/h4>\n

    import<\/span> 'package:shelf\/shelf.dart'<\/span><\/span>;<\/span>
    \nimport<\/span> 'package:shelf\/shelf_io.dart'<\/span><\/span> as<\/span> io;<\/span>
    \nimport<\/span> 'package:shelf_static\/shelf_static.dart'<\/span><\/span>;<\/span><\/p>\n

    void<\/span> main<\/span>(<\/span>)<\/span> async<\/span> {<\/span>
    \n \/\/ 1. \u521b\u5efa\u9759\u6001\u6587\u4ef6\u5904\u7406\u5668<\/span>
    \n \/\/ defaultDocument: \u8bbf\u95ee\u6839\u76ee\u5f55\u65f6\u9ed8\u8ba4\u8fd4\u56de\u7684\u6587\u4ef6<\/span>
    \n \/\/ listDirectories: \u662f\u5426\u5141\u8bb8\u5217\u51fa\u6587\u4ef6\u76ee\u5f55（\u751f\u4ea7\u73af\u5883\u5efa\u8bae false）<\/span>
    \n var<\/span> handler =<\/span> createStaticHandler<\/span>(<\/span>
    \n 'public'<\/span><\/span>,<\/span>
    \n defaultDocument:<\/span> 'index.html'<\/span><\/span>,<\/span>
    \n listDirectories:<\/span> true<\/span>
    \n )<\/span>;<\/span><\/p>\n

    \/\/ 2. \u542f\u52a8\u670d\u52a1<\/span>
    \n var<\/span> server =<\/span> await<\/span> io.<\/span>serve<\/span>(<\/span>handler,<\/span> 'localhost'<\/span><\/span>,<\/span> 8080<\/span>)<\/span>;<\/span>
    \n print<\/span>(<\/span>'Serving at http:\/\/<\/span>${<\/span>server.<\/span>address.<\/span>host<\/span>}<\/span><\/span>:<\/span>${<\/span>server.<\/span>port<\/span>}<\/span><\/span>'<\/span><\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    2.2 \u865a\u62df\u76ee\u5f55\u6620\u5c04（Virtual Directory）<\/h4>\n

    \u6709\u65f6\u5019\u6211\u4eec\u60f3\u5c06 \/static\/ \u8def\u5f84\u6620\u5c04\u5230\u7269\u7406\u76ee\u5f55 \/data\/files\/\u3002\u8fd9\u65f6\u7ed3\u5408 shelf_router \u4f7f\u7528\u6548\u679c\u66f4\u4f73\u3002<\/p>\n

    import<\/span> 'package:shelf_router\/shelf_router.dart'<\/span><\/span>;<\/span><\/p>\n

    final<\/span> app =<\/span> Router<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u5c06 \/files\/ \u4e0b\u7684\u6240\u6709\u8bf7\u6c42\u8f6c\u53d1\u7ed9 shelf_static<\/span>
    \n\/\/ \u6ce8\u610f：web_files \u5fc5\u987b\u662f\u7269\u7406\u5b58\u5728\u7684\u76ee\u5f55<\/span>
    \n\/\/ stripPrefix: \u53bb\u6389 URL \u524d\u7f00\u518d\u67e5\u627e\u6587\u4ef6<\/span>
    \napp.<\/span>mount<\/span>(<\/span>'\/files\/'<\/span><\/span>,<\/span> createStaticHandler<\/span>(<\/span>'\/data\/storage\/files'<\/span><\/span>)<\/span>)<\/span>;<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u4e09\u3001OpenHarmony \u5e73\u53f0\u9002\u914d\u5b9e\u6218<\/h3>\n

    \u5728\u9e3f\u8499\u7cfb\u7edf\u4e0a，\u6700\u5178\u578b\u7684\u5e94\u7528\u573a\u666f\u662f：App\u5185\u7f6e\u5fae\u670d\u52a1，\u4f9b Web \u7ec4\u4ef6\u8c03\u7528\u3002<\/p>\n

    3.1 \u9e3f\u8499\u5e94\u7528\u6c99\u7bb1\u8def\u5f84<\/h4>\n

    \u9e3f\u8499\u7684\u6c99\u7bb1\u673a\u5236\u975e\u5e38\u4e25\u683c\u3002\u5982\u679c\u4f60\u7684 H5 \u8d44\u6e90\u6253\u5305\u5728 assets \u4e2d（\u5728\u9e3f\u8499\u662f rawfile），Dart \u662f\u65e0\u6cd5\u76f4\u63a5\u901a\u8fc7\u6587\u4ef6\u8def\u5f84\u8bbf\u95ee\u7684（\u56e0\u4e3a rawfile \u5728 hap \u5305\u5185，\u662f\u538b\u7f29\u7684）\u3002<\/p>\n

    \u89e3\u51b3\u65b9\u6848：<\/p>\n

  • \u9996\u6b21\u542f\u52a8\u590d\u5236：App \u542f\u52a8\u65f6，\u5c06 rawfile \u4e0b\u7684\u8d44\u6e90\u89e3\u538b\/\u590d\u5236\u5230 getApplicationDocumentsDirectory() \u4e0b\u7684\u67d0\u4e2a\u76ee\u5f55（\u5982 www）\u3002<\/li>\n
  • \u670d\u52a1\u8be5\u76ee\u5f55：\u4f7f\u7528 shelf_static \u6307\u5411\u8fd9\u4e2a www \u76ee\u5f55\u3002<\/li>\n

    \/\/ 1. \u590d\u5236\u8d44\u6e90 (\u4f7f\u7528 flutter\/services)<\/span>
    \nFuture<\/span><<\/span>void<\/span>><\/span><\/span> copyAssets<\/span>(<\/span>)<\/span> async<\/span> {<\/span>
    \n final<\/span> dir =<\/span> await<\/span> getApplicationDocumentsDirectory<\/span>(<\/span>)<\/span>;<\/span>
    \n final<\/span> indexFile =<\/span> File<\/span>(<\/span>'<\/span>${<\/span>dir.<\/span>path<\/span>}<\/span><\/span>\/www\/index.html'<\/span><\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>indexFile.<\/span>existsSync<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
    \n \/\/ \u8bfb\u53d6 Asset<\/span>
    \n final<\/span> bytes =<\/span> await<\/span> rootBundle.<\/span>load<\/span>(<\/span>'assets\/www\/index.html'<\/span><\/span>)<\/span>;<\/span>
    \n \/\/ \u5199\u5165\u6587\u4ef6\u7cfb\u7edf<\/span>
    \n await<\/span> indexFile.<\/span>create<\/span>(<\/span>recursive:<\/span> true<\/span>)<\/span>;<\/span>
    \n await<\/span> indexFile.<\/span>writeAsBytes<\/span>(<\/span>bytes.<\/span>buffer.<\/span>asUint8List<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    3.2 \u5b9e\u6218：\u672c\u5730\u89c6\u9891\u6d41\u670d\u52a1\u5668<\/h4>\n

    \u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\u3002\u5f88\u591a\u89c6\u9891\u64ad\u653e\u5668\u4e0d\u652f\u6301\u76f4\u63a5\u64ad\u653e\u79c1\u6709\u76ee\u5f55\u4e0b\u7684\u6587\u4ef6，\u6216\u8005\u4e0d\u652f\u6301\u590d\u6742\u7684\u52a0\u5bc6\u6d41\u3002\u6211\u4eec\u53ef\u4ee5\u7528 Shelf \u642d\u5efa\u4e00\u4e2a\u672c\u5730\u4ee3\u7406\u3002<\/p>\n

    import<\/span> 'dart:io'<\/span><\/span>;<\/span>
    \nimport<\/span> 'package:shelf\/shelf.dart'<\/span><\/span>;<\/span>
    \nimport<\/span> 'package:shelf\/shelf_io.dart'<\/span><\/span> as<\/span> shelf_io;<\/span>
    \nimport<\/span> 'package:shelf_static\/shelf_static.dart'<\/span><\/span>;<\/span>
    \nimport<\/span> 'package:path_provider\/path_provider.dart'<\/span><\/span>;<\/span><\/p>\n

    class<\/span> VideoServer<\/span> {<\/span>
    \n HttpServer<\/span>?<\/span> _server;<\/span>
    \n int get<\/span> port =<\/span>><\/span> _server?<\/span>.<\/span>port ?<\/span>?<\/span> 0<\/span>;<\/span><\/p>\n

    Future<\/span><<\/span>void<\/span>><\/span><\/span> start<\/span>(<\/span>)<\/span> async<\/span> {<\/span>
    \n final<\/span> docsDir =<\/span> await<\/span> getApplicationDocumentsDirectory<\/span>(<\/span>)<\/span>;<\/span>
    \n final<\/span> videoDir =<\/span> Directory<\/span>(<\/span>'<\/span>${<\/span>docsDir.<\/span>path<\/span>}<\/span><\/span>\/videos'<\/span><\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u786e\u4fdd\u76ee\u5f55\u5b58\u5728<\/span>
    \n if<\/span> (<\/span>!<\/span>await<\/span> videoDir.<\/span>exists<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
    \n await<\/span> videoDir.<\/span>create<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u5173\u952e\u914d\u7f6e：\u5f00\u542f Range \u652f\u6301<\/span>
    \n final<\/span> staticHandler =<\/span> createStaticHandler<\/span>(<\/span>
    \n videoDir.<\/span>path,<\/span>
    \n serveFilesOutsidePath:<\/span> false<\/span>,<\/span> \/\/ \u5b89\u5168\u914d\u7f6e<\/span>
    \n listDirectories:<\/span> false<\/span>,<\/span>
    \n )<\/span>;<\/span><\/p>\n

    \/\/ \u589e\u52a0\u65e5\u5fd7\u4e2d\u95f4\u4ef6<\/span>
    \n final<\/span> handler =<\/span> Pipeline<\/span>(<\/span>)<\/span>
    \n .<\/span>addMiddleware<\/span>(<\/span>logRequests<\/span>(<\/span>)<\/span>)<\/span>
    \n .<\/span>addHandler<\/span>(<\/span>staticHandler)<\/span>;<\/span><\/p>\n

    \/\/ \u7ed1\u5b9a localhost (\u4ec5\u672c\u673a\u53ef\u8bbf\u95ee，\u66f4\u5b89\u5168)<\/span>
    \n _server =<\/span> await<\/span> shelf_io.<\/span>serve<\/span>(<\/span>handler,<\/span> InternetAddress<\/span>.<\/span>loopbackIPv4,<\/span> 0<\/span>)<\/span>;<\/span>
    \n print<\/span>(<\/span>'Video Server running on port <\/span>${<\/span>_server!<\/span>.<\/span>port<\/span>}<\/span><\/span>'<\/span><\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u83b7\u53d6\u89c6\u9891\u64ad\u653e URL<\/span>
    \n String<\/span> getVideoUrl<\/span>(<\/span>String<\/span> filename)<\/span> {<\/span>
    \n return<\/span> 'http:\/\/127.0.0.1:<\/span>$<\/span>port<\/span><\/span>\/<\/span>$<\/span>filename<\/span><\/span>'<\/span><\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    3.3 \u5728 Web \u7ec4\u4ef6\u4e2d\u4f7f\u7528<\/h4>\n

    \u542f\u52a8 Server \u540e，\u6211\u4eec\u5728 Flutter \u7684 WebView \u6216\u9e3f\u8499\u539f\u751f\u7684 ArkWeb \u4e2d\u52a0\u8f7d：<\/p>\n

    \/\/ \u5047\u8bbe\u5df2\u542f\u52a8 Server<\/span>
    \nfinal<\/span> url =<\/span> videoServer.<\/span>getVideoUrl<\/span>(<\/span>'movie.mp4'<\/span><\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u4f7f\u7528 video_player \u4e5f\u662f\u4e00\u6837\u7684\u539f\u7406<\/span>
    \nVideoPlayerController<\/span>.<\/span>network<\/span>(<\/span>url)<\/span>.<\/span>.<\/span>initialize<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    \u7531\u4e8e shelf_static \u652f\u6301 HTTP Range，\u89c6\u9891\u64ad\u653e\u5668\u53ef\u4ee5：<\/p>\n

  • \u79d2\u5f00：\u53ea\u8bf7\u6c42\u524d\u51e0 KB \u6570\u636e\u89e3\u6790 Metadata\u3002<\/li>\n
  • \u968f\u610f\u62d6\u52a8：\u76f4\u63a5 seek \u5230\u4e2d\u95f4\u4f4d\u7f6e，\u670d\u52a1\u5668\u53ea\u8fd4\u56de\u540e\u534a\u6bb5\u6570\u636e\u3002<\/li>\n

    \u56db\u3001\u9ad8\u7ea7\u8fdb\u9636：\u5b89\u5168\u6027\u4e0e\u6027\u80fd\u4f18\u5316<\/h3>\n

    4.1 \u76ee\u5f55\u904d\u5386\u653b\u51fb (Directory Traversal)<\/h4>\n

    \u8fd9\u662f\u9759\u6001\u6587\u4ef6\u670d\u52a1\u6700\u5927\u7684\u5b89\u5168\u9690\u60a3\u3002\u653b\u51fb\u8005\u53ef\u80fd\u8bf7\u6c42 GET \/..\/..\/..\/..\/etc\/passwd\u3002 shelf_static \u9ed8\u8ba4\u542f\u7528\u4e86\u9632\u5fa1\u673a\u5236，\u5b83\u4f1a\u89c4\u8303\u5316\u8def\u5f84\u5e76\u5728\u8bbf\u95ee\u524d\u68c0\u67e5\u662f\u5426\u9003\u9038\u51fa\u4e86 root \u76ee\u5f55\u3002 \u4f46\u662f，\u5982\u679c\u4f60\u5f00\u542f\u4e86\u7b26\u53f7\u94fe\u63a5（Symlink）\u652f\u6301，\u9700\u683c\u5916\u5c0f\u5fc3\u3002<\/p>\n

    \u5efa\u8bae：\u59cb\u7ec8\u8bbe\u7f6e serveFilesOutsidePath: false\u3002<\/p>\n

    4.2 \u7f13\u5b58\u7b56\u7565 (Cache-Control)<\/h4>\n

    \u5bf9\u4e8e\u9759\u6001\u8d44\u6e90，\u5408\u7406\u7684\u7f13\u5b58\u80fd\u51cf\u5c11 IO，\u63d0\u5347\u52a0\u8f7d\u901f\u5ea6\u3002<\/p>\n

    \/\/ \u81ea\u5b9a\u4e49 Header \u4e2d\u95f4\u4ef6<\/span>
    \nHandler<\/span> cacheMiddleware<\/span>(<\/span>Handler<\/span> innerHandler)<\/span> {<\/span>
    \n return<\/span> (<\/span>request)<\/span> async<\/span> {<\/span>
    \n final<\/span> response =<\/span> await<\/span> innerHandler<\/span>(<\/span>request)<\/span>;<\/span><\/p>\n

    \/\/ \u5982\u679c\u662f\u56fe\u7247，\u7f13\u5b58 1 \u5929<\/span>
    \n if<\/span> (<\/span>response.<\/span>mimeType?<\/span>.<\/span>startsWith<\/span>(<\/span>'image\/'<\/span><\/span>)<\/span> ?<\/span>?<\/span> false<\/span>)<\/span> {<\/span>
    \n return<\/span> response.<\/span>change<\/span>(<\/span>headers:<\/span> {<\/span>
    \n 'Cache-Control'<\/span><\/span>:<\/span> 'public, max-age=86400'<\/span><\/span>,<\/span>
    \n }<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n return<\/span> response;<\/span>
    \n }<\/span>;<\/span>
    \n}<\/span><\/p>\n

    4.3 \u6027\u80fd：Sendfile<\/h4>\n

    \u5728 Linux\/Android \u4e0a，\u9ad8\u6027\u80fd Web Server（\u5982 Nginx）\u4f1a\u4f7f\u7528\u5185\u6838\u7ea7\u7684 sendfile \u7cfb\u7edf\u8c03\u7528（\u96f6\u62f7\u8d1d）\u3002 Dart \u7684 shelf_static \u76ee\u524d\u4e3b\u8981\u662f\u5e94\u7528\u5c42\u8bfb\u5199\u3002\u5bf9\u4e8e\u8d85\u5927\u6587\u4ef6\u5e76\u53d1（\u5982 100 \u4eba\u540c\u65f6\u4e0b\u8f7d），\u6027\u80fd\u4e0d\u5982 Nginx\u3002\u4f46\u5bf9\u4e8e\u79fb\u52a8\u7aef\u672c\u5730\u670d\u52a1（\u901a\u5e38\u53ea\u6709 1 \u4e2a\u5ba2\u6237\u7aef），\u6027\u80fd\u7ef0\u7ef0\u6709\u4f59\u3002<\/p>\n

    \u4e94\u3001\u603b\u7ed3<\/h3>\n

    shelf_static \u662f Dart \u5168\u6808\u5f00\u53d1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u5757\u62fc\u56fe\u3002\u5b83\u7528\u6781\u5c11\u7684\u4ee3\u7801\u6781\u5176\u4f18\u96c5\u5730\u89e3\u51b3\u4e86\u201c\u6587\u4ef6\u670d\u52a1\u201d\u8fd9\u4e00\u57fa\u7840\u9700\u6c42\u3002<\/p>\n

    \u5728 OpenHarmony \u5e73\u53f0\u4e0a，\u5b83\u5c55\u73b0\u4e86\u5f3a\u5927\u7684\u751f\u547d\u529b：<\/p>\n

  • \u517c\u5bb9\u6027\u5f3a：\u7eaf Dart \u5b9e\u73b0，\u65e0 Native \u4f9d\u8d56，\u9e3f\u8499\u65e0\u7f1d\u8fd0\u884c\u3002<\/li>\n
  • \u534f\u8bae\u6807\u51c6：\u5bf9 HTTP Range \u7684\u5b8c\u7f8e\u652f\u6301，\u4f7f\u5176\u6210\u4e3a\u672c\u5730\u591a\u5a92\u4f53\u670d\u52a1\u7684\u57fa\u77f3\u3002<\/li>\n
  • \u5b89\u5168\u6027\u9ad8：\u5185\u7f6e\u8def\u5f84\u68c0\u67e5，\u9632\u6b62\u6587\u4ef6\u6cc4\u9732\u3002<\/li>\n

    \u6700\u4f73\u5b9e\u8df5：<\/p>\n

      \n
    • \u4e0d\u8981\u5728 UI \u7ebf\u7a0b\u542f\u52a8 Server（\u867d\u7136\u662f\u5f02\u6b65 IO，\u4f46\u8bf7\u6c42\u5904\u7406\u903b\u8f91\u5728 Isolate \u5185）\u3002\u5efa\u8bae\u653e\u5728\u72ec\u7acb\u7684 Isolate \u542f\u52a8 shelf \u670d\u52a1，\u7279\u522b\u662f\u9700\u8981\u5904\u7406\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\u65f6\u3002<\/li>\n<\/ul>\n
      \n","protected":false},"excerpt":{"rendered":"

      \u6b22\u8fce\u52a0\u5165\u5f00\u6e90\u9e3f\u8499\u8de8\u5e73\u53f0\u793e\u533a：https:\/\/openharmonycrossplatform.csdn.net \u524d\u8a00
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