{"id":209631,"date":"2025-10-23T19:23:09","date_gmt":"2025-10-23T11:23:09","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209631\/"},"modified":"2025-10-23T19:23:10","modified_gmt":"2025-10-23T11:23:10","slug":"cdn-68","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209631\/","title":{"rendered":"\u79fb\u52a8\u5e94\u7528 CDN \u52a0\u901f\u5b9e\u6218\uff1a\u63d0\u5347\u9996\u5c4f\u901f\u5ea6\u4e0e\u6d41\u7545\u4f53\u9a8c\u7684\u5173\u952e\u7b56\u7565"},"content":{"rendered":"<p>\u5728\u79fb\u52a8\u4e92\u8054\u7f51\u65f6\u4ee3\uff0c\u7528\u6237\u5bf9\u9996\u5c4f\u52a0\u8f7d\u901f\u5ea6\u548c\u4ea4\u4e92\u6d41\u7545\u6027\u7684\u671f\u671b\u8d8a\u6765\u8d8a\u9ad8\u3002\u5bf9\u4e8e\u9762\u5411\u5168\u7403\u6216\u8de8\u533a\u57df\u7528\u6237\u7684\u5e94\u7528\uff0c\u4f7f\u7528 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\u7f51\u7edc\uff0c\u518d\u5230\u4fe1\u53f7\u5dee\u7684\u8fb9\u7f18\u573a\u666f\uff0c<strong>\u7f51\u7edc\u6296\u52a8\u3001\u4e22\u5305\u4e0e\u8f83\u9ad8\u7684\u65f6\u5ef6<\/strong>\u662f\u5e38\u89c1\u95ee\u9898\u3002\u76f8\u6bd4\u684c\u9762\u7aef\uff0c\u79fb\u52a8\u7aef\u7528\u6237\u66f4\u654f\u611f\u4e8e\u9996\u5c4f\uff08First Contentful Paint, FCP\uff09\u548c\u9996\u5b57\u8282\u65f6\u95f4\uff08Time To First Byte, TTFB\uff09\u3002CDN \u80fd\u5c06\u5185\u5bb9\u7f13\u5b58\u5230\u79bb\u7528\u6237\u66f4\u8fd1\u7684\u8282\u70b9\u4ee5\u7f29\u77ed\u7f51\u7edc\u8ddd\u79bb\uff0c\u663e\u8457\u964d\u4f4e TTFB \u548c\u9996\u5c4f\u6e32\u67d3\u65f6\u95f4\uff0c\u63d0\u5347\u7528\u6237\u611f\u77e5\u6027\u80fd\u3002<\/p>\n<h2>CDN \u7684\u57fa\u672c\u539f\u7406\u4e0e\u79fb\u52a8\u4f18\u5316\u8981\u70b9<\/h2>\n<h3>\u8fb9\u7f18\u7f13\u5b58\u4e0e Anycast \u8def\u7531<\/h3>\n<p>CDN \u901a\u8fc7\u5728\u5168\u7403\u6216\u533a\u57df\u8282\u70b9\u90e8\u7f72\u7f13\u5b58\u670d\u52a1\u5668\uff0c\u5c06\u9759\u6001\u8d44\u6e90\uff08\u5982 JS\u3001CSS\u3001\u56fe\u7247\u3001\u5b57\u4f53\u3001\u89c6\u9891\u5207\u7247\u7b49\uff09\u9760\u8fd1\u7ec8\u7aef\u3002<strong>Anycast \u8def\u7531<\/strong>\u7528\u4e8e\u5c06\u7528\u6237\u6d41\u91cf\u5f15\u5bfc\u5230\u6700\u8fd1\u6216\u6700\u4f73\u7f51\u7edc\u8def\u5f84\u7684\u8282\u70b9\uff0c\u4ece\u800c\u51cf\u5c11 RTT\u3002\u5bf9\u4e8e\u79fb\u52a8\u7528\u6237\uff0c\u8282\u70b9\u8986\u76d6\u7684\u5730\u7406\u7c92\u5ea6\u548c\u9aa8\u5e72\u7f51\u7edc\u8d28\u91cf\u5c24\u4e3a\u5173\u952e\uff0c\u4f8b\u5982\u5728\u4e1c\u4e9a\u90e8\u7f72\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65e5\u672c\u670d\u52a1\u5668\u53ef\u63d0\u5347\u8be5\u533a\u57df\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h3>\u7f13\u5b58\u7b56\u7565\u4e0e HTTP \u5934\u4f18\u5316<\/h3>\n<p>\u5408\u7406\u7684\u7f13\u5b58\u7b56\u7565\u51b3\u5b9a\u4e86 CDN \u7684\u547d\u4e2d\u7387\u4e0e\u8d44\u6e90\u65b0\u9c9c\u5ea6\u3002\u5e38\u7528\u914d\u7f6e\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>Cache-Control<\/strong>\uff08max-age, s-maxage, public\/private\uff09\u7528\u4e8e\u63a7\u5236\u6d4f\u89c8\u5668\u4e0e\u4e2d\u95f4\u4ee3\u7406\u7684\u7f13\u5b58\u884c\u4e3a\u3002<\/li>\n<li><strong>ETag\/Last-Modified<\/strong>\u652f\u6301\u6761\u4ef6\u8bf7\u6c42\uff0c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u5b8c\u6574\u4e0b\u8f7d\u3002<\/li>\n<li><strong>\u7f13\u5b58\u5206\u5c42\uff08Origin Shield\uff09<\/strong>\u53ef\u51cf\u5c11\u6e90\u7ad9\u538b\u529b\u4e0e\u56de\u6e90\u9891\u7387\uff0c\u9002\u5408\u7a81\u53d1\u6d41\u91cf\u6216\u9ad8\u5e76\u53d1\u573a\u666f\u3002<\/li>\n<li><strong>\u5206\u6bb5\/\u5206\u7247\u7f13\u5b58<\/strong>\uff08\u9002\u7528\u4e8e\u89c6\u9891\/\u5927\u6587\u4ef6\uff09\uff0c\u7f13\u5b58\u6bcf\u4e2a\u5206\u6bb5\u4ee5\u51cf\u5c11\u91cd\u590d\u4f20\u8f93\u3002<\/li>\n<\/ul>\n<p>\u5728\u79fb\u52a8\u573a\u666f\u4e0b\uff0c\u5efa\u8bae\u5bf9\u5173\u952e\u9996\u5c4f\u8d44\u6e90\u8bbe\u7f6e\u8f83\u957f\u7684 CDN \u7f13\u5b58\u65f6\u95f4\uff08\u5408\u7406\u7ed3\u5408\u7248\u672c\u63a7\u5236\/Cache Busting\uff09\uff0c\u5e76\u4e3a\u5b9e\u65f6\u53d8\u66f4\u5185\u5bb9\u4f7f\u7528\u77ed TTL \u6216\u52a8\u6001\u7f13\u5b58\u7b56\u7565\u3002<\/p>\n<h3>\u4f20\u8f93\u5c42\u4f18\u5316\uff1aHTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u4e0e TLS<\/h3>\n<p>\u591a\u8def\u590d\u7528\u4e0e\u5934\u90e8\u538b\u7f29\u7684 HTTP\/2 \u80fd\u51cf\u5c11\u79fb\u52a8\u7f51\u7edc\u4e0b\u7684\u8fde\u63a5\u6570\u4e0e\u63e1\u624b\u5f00\u9500\uff1b\u800c HTTP\/3\uff08\u57fa\u4e8e QUIC\uff09\u901a\u8fc7\u5728 UDP \u4e0a\u5b9e\u73b0\u66f4\u5feb\u7684\u8fde\u63a5\u5efa\u7acb\u4e0e\u66f4\u597d\u7684\u4e22\u5305\u6062\u590d\uff0c\u80fd\u5728\u9ad8\u4e22\u5305\u73af\u5883\u4e0b\u5e26\u6765\u660e\u663e\u6027\u80fd\u63d0\u5347\u3002<strong>\u542f\u7528 HTTP\/2 \u548c HTTP\/3 \u5e76\u914d\u7f6e TLS 1.3<\/strong>\uff0c\u80fd\u591f\u663e\u8457\u964d\u4f4e\u9996\u5305\u65f6\u5ef6\u548c\u63e1\u624b\u6210\u672c\u3002<\/p>\n<h3>\u63e1\u624b\u4e0e\u8fde\u63a5\u91cd\u7528<\/h3>\n<p>\u79fb\u52a8\u7f51\u7edc\u4e2d\u7684\u9891\u7e41\u5207\u6362\u4f1a\u5bfc\u81f4\u65b0\u7684 TCP\/TLS \u63e1\u624b\uff0c\u5f71\u54cd\u4f53\u9a8c\u3002\u5e94\u5c3d\u91cf\u505a\u5230\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u957f\u8fde\u63a5\u548c\u8fde\u63a5\u590d\u7528\u51cf\u5c11\u63e1\u624b\u6b21\u6570\u3002<\/li>\n<li>\u652f\u6301 TLS \u4f1a\u8bdd\u6062\u590d\u4e0e 0-RTT\uff08\u5728\u53ef\u63a7\u98ce\u9669\u4e0b\u4f7f\u7528\uff09\u3002<\/li>\n<li>\u5f00\u542f TCP Fast Open\uff08\u89c6\u7f51\u7edc\u517c\u5bb9\u6027\uff09\u3002<\/li>\n<\/ul>\n<h2>\u79fb\u52a8\u5e94\u7528\u5e38\u89c1\u7684 CDN \u5e94\u7528\u573a\u666f<\/h2>\n<h3>\u9996\u5c4f\u8d44\u6e90\u52a0\u901f<\/h3>\n<p>\u9996\u5c4f\u8d44\u6e90\u901a\u5e38\u5305\u62ec HTML\uff08\u6216\u9996\u5c4f\u6e32\u67d3\u6570\u636e\u7684 API \u63a5\u53e3\uff09\u3001\u5173\u952e CSS\u3001\u9996\u5c4f\u56fe\u7247\u4e0e\u5b57\u4f53\u3002\u5bf9\u4e8e\u57fa\u4e8e SPA \u7684\u79fb\u52a8\u5e94\u7528\uff0c\u53ef\u4ee5\u5c06\u9996\u5c4f\u5173\u952e\u6e32\u67d3\u8d44\u6e90\u901a\u8fc7 CDN \u7f13\u5b58\u5e76\u8bbe\u7f6e\u9884\u8fde\u63a5\uff08preconnect\uff09\u4e0e\u9884\u52a0\u8f7d\uff08preload\uff09\u7b56\u7565\uff0c\u7f29\u77ed\u9996\u5305\u5230\u8fbe\u65f6\u95f4\u3002\u5bf9\u4e8e\u52a8\u6001\u9996\u5c4f\u5185\u5bb9\uff0c\u53ef\u8003\u8651\u628a\u6e32\u67d3\u9700\u8981\u7684\u6838\u5fc3\u6570\u636e\u505a\u9759\u6001\u5316\u6216\u8fb9\u7f18\u6e32\u67d3\uff08Edge Side Rendering\u3001Edge Compute\uff09\u3002<\/p>\n<h3>\u9759\u6001\u8d44\u6e90\u4e0e\u5a92\u4f53\u5206\u53d1<\/h3>\n<p>\u56fe\u7247\u3001\u89c6\u9891\u548c\u97f3\u9891\u662f\u79fb\u52a8\u5e94\u7528\u6d41\u91cf\u7684\u5927\u5934\u3002\u542f\u7528\u56fe\u7247\u683c\u5f0f\u8f6c\u6362\uff08WebP\/AVIF\uff09\u3001\u6309\u9700\u5c3a\u5bf8\u88c1\u526a\u4e0e\u5ef6\u8fdf\u52a0\u8f7d\uff08lazy loading\uff09\u914d\u5408 CDN \u7684\u56fe\u50cf\u4f18\u5316\u670d\u52a1\uff0c\u53ef\u4ee5\u964d\u4f4e\u5e26\u5bbd\u5e76\u63d0\u9ad8\u52a0\u8f7d\u901f\u5ea6\u3002\u5bf9\u89c6\u9891\u5efa\u8bae\u4f7f\u7528\u81ea\u9002\u5e94\u7801\u7387\u6d41\uff08HLS\/DASH\uff09\u5e76\u5728 CDN \u8fb9\u7f18\u7f13\u5b58\u5207\u7247\uff0c\u914d\u5408 CDN \u7684\u6d41\u5a92\u4f53\u52a0\u901f\u529f\u80fd\u5b9e\u73b0\u5feb\u901f\u542f\u52a8\u4e0e\u6d41\u7545\u64ad\u653e\u3002<\/p>\n<h3>API \u52a8\u6001\u52a0\u901f\u4e0e Edge Compute<\/h3>\n<p>\u79fb\u52a8\u5e94\u7528\u7684 API \u8bf7\u6c42\u9891\u7e41\u4e14\u5ef6\u8fdf\u654f\u611f\u3002CDN \u7684\u8fb9\u7f18\u8ba1\u7b97\u80fd\u529b\u53ef\u4ee5\u5728\u8fb9\u7f18\u8282\u70b9\u505a\u8f7b\u91cf\u5316\u903b\u8f91\uff08\u5982\u9274\u6743\u3001\u5185\u5bb9\u62fc\u63a5\u3001\u7f13\u5b58\u5316\u77ed\u671f\u6570\u636e\uff09\uff0c\u51cf\u5c11\u56de\u6e90\u6b21\u6570\u4e0e\u8bf7\u6c42\u5ef6\u8fdf\u3002\u8fd9\u5bf9\u4e8e\u5168\u7403\u7528\u6237\u5c24\u4e3a\u91cd\u8981\uff0c\u4f8b\u5982\u8d2d\u4e70\u4ece\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u8c03\u5ea6\u65f6\uff0c\u8fb9\u7f18\u5904\u7406\u80fd\u907f\u514d\u8de8\u6d0b\u56de\u6e90\u5bf9\u5b9e\u65f6\u4ea4\u4e92\u7684\u5f71\u54cd\u3002<\/p>\n<h2>\u8861\u91cf\u6548\u679c\u7684\u5173\u952e\u6307\u6807\u4e0e\u89c2\u6d4b\u65b9\u6cd5<\/h2>\n<p>\u8981\u8bc4\u4f30 CDN \u5bf9\u79fb\u52a8\u7aef\u7684\u5b9e\u9645\u63d0\u5347\uff0c\u5e94\u7ed3\u5408\u771f\u5b9e\u7528\u6237\u76d1\u6d4b\uff08RUM\uff09\u4e0e\u5408\u6210\u6d4b\u8bd5\uff08Synthetic\uff09\uff1a<\/p>\n<ul>\n<li>\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u4e0e\u9996\u5c4f\u65f6\u95f4\uff08FCP\/FMP\uff09\u3002<\/li>\n<li>\u9996\u4ea4\u4e92\u65f6\u95f4\uff08Time to Interactive, TTI\uff09\u4e0e\u7d2f\u8ba1\u5e03\u5c40\u504f\u79fb\uff08CLS\uff09\u3002<\/li>\n<li>\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u56de\u6e90\u7387\u4e0e\u56de\u6e90\u5e26\u5bbd\u3002<\/li>\n<li>\u9519\u8bef\u7387\uff084xx\/5xx\uff09\u3001TLS \u63e1\u624b\u5931\u8d25\u4e0e\u4e22\u5305\u7edf\u8ba1\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u6307\u6807\u53ef\u4ee5\u5b9a\u4f4d\u662f DNS \u89e3\u6790\u3001TCP \u63e1\u624b\u3001TLS \u63e1\u624b\u8fd8\u662f\u8d44\u6e90\u4e0b\u8f7d\u5bfc\u81f4\u7684\u5ef6\u8fdf\uff0c\u5e76\u636e\u6b64\u4f18\u5316\u3002<\/p>\n<h2>\u4e0d\u540c\u5730\u533a\u4e0e\u8282\u70b9\u9009\u62e9\u7684\u539f\u5219<\/h2>\n<p>\u5bf9\u4e8e\u5168\u7403\u4e1a\u52a1\uff0c\u8282\u70b9\u8986\u76d6\u4e0e\u7f51\u7edc\u8d28\u91cf\u51b3\u5b9a\u4e86\u52a0\u901f\u6548\u679c\u3002\u4e00\u822c\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u7528\u6237\u96c6\u4e2d\u5728\u4e1c\u4e9a\u65f6\uff0c\u4f18\u5148\u8003\u8651\u9999\u6e2f\u3001\u4e1c\u4eac\uff08\u65e5\u672c\u670d\u52a1\u5668\uff09\u3001\u9996\u5c14\uff08\u97e9\u56fd\u670d\u52a1\u5668\uff09\u548c\u65b0\u52a0\u5761\u8282\u70b9\u3002<\/li>\n<li>\u5317\u7f8e\u7528\u6237\u5219\u9700\u5b8c\u5584\u7f8e\u56fd\u670d\u52a1\u5668\u8282\u70b9\u548c\u7f8e\u56fd VPS \u7684\u652f\u6301\uff0c\u4fdd\u8bc1\u4f4e\u5ef6\u8fdf\u4e0e\u7a33\u5b9a\u56de\u6e90\u3002<\/li>\n<li>\u5bf9\u8de8\u56fd\u6df7\u5408\u90e8\u7f72\uff0c\u91c7\u7528\u591a\u533a\u57df Anycast + \u667a\u80fd\u8c03\u5ea6\u7b56\u7565\u5b9e\u73b0\u6700\u4f18\u8def\u7531\u3002<\/li>\n<\/ul>\n<p>\u82e5\u81ea\u5efa\u6216\u9009\u8d2d\u670d\u52a1\u5668\uff0c\u7ed3\u5408 <a href=\"https:\/\/server.hk\/server.php\">\u9999\u6e2f\u670d\u52a1\u5668<\/a> \u4e0e\u6d77\u5916\u8282\u70b9\uff08\u5982\u7f8e\u56fd VPS\u3001\u65e5\u672c\u670d\u52a1\u5668\uff09\u53ef\u4ee5\u6784\u5efa\u7075\u6d3b\u7684\u6e90\u7ad9\u4e0e\u7f13\u5b58\u5c42\u3002<\/p>\n<h2>\u4e0e\u4f20\u7edf Origin-Only \u90e8\u7f72\u7684\u4f18\u52bf\u5bf9\u6bd4<\/h2>\n<ul>\n<li><strong>\u5ef6\u8fdf\u4e0e\u9996\u5c4f\u901f\u5ea6\uff1a<\/strong>CDN \u53ef\u663e\u8457\u964d\u4f4e\u5730\u57df\u6027\u5ef6\u8fdf\uff0c\u9996\u5c4f\u52a0\u8f7d\u66f4\u5feb\uff1b\u5355\u4e00 origin \u5728\u8de8\u5883\u573a\u666f\u4e0b\u96be\u4ee5\u4fdd\u8bc1\u4e00\u81f4\u4f53\u9a8c\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\u4e0e\u6297\u538b\u80fd\u529b\uff1a<\/strong>CDN 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