{"id":209563,"date":"2025-10-23T17:38:22","date_gmt":"2025-10-23T09:38:22","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209563\/"},"modified":"2025-10-23T17:38:23","modified_gmt":"2025-10-23T09:38:23","slug":"cdn%e5%8a%a8%e6%80%81%e5%86%85%e5%ae%b9%e5%8a%a0%e9%80%9f%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209563\/","title":{"rendered":"CDN\u52a8\u6001\u5185\u5bb9\u52a0\u901f\u65b9\u6848\uff1a\u5b9e\u73b0\u4f4e\u5ef6\u8fdf\u4e0e\u9ad8\u5e76\u53d1\u7684\u8fb9\u7f18\u5316\u67b6\u6784"},"content":{"rendered":"<p>\u5728\u4e92\u8054\u7f51\u5e94\u7528\u5411\u5b9e\u65f6\u5316\u3001\u4e2a\u6027\u5316\u548c\u5168\u7403\u5316\u6f14\u8fdb\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f20\u7edf\u7684CDN\u4e3b\u8981\u7528\u4e8e\u9759\u6001\u8d44\u6e90\u5206\u53d1\u5df2\u65e0\u6cd5\u6ee1\u8db3\u4f4e\u5ef6\u8fdf\u548c\u9ad8\u5e76\u53d1\u4e0b\u5bf9\u52a8\u6001\u5185\u5bb9\u7684\u52a0\u901f\u9700\u6c42\u3002\u672c\u6587\u4ece\u539f\u7406\u5230\u5b9e\u8df5\u3001\u4ece\u573a\u666f\u5230\u9009\u8d2d\u5efa\u8bae\uff0c\u6df1\u5165\u89e3\u6790\u5982\u4f55\u901a\u8fc7\u8fb9\u7f18\u5316\u67b6\u6784\u5b9e\u73b0\u5bf9\u52a8\u6001\u5185\u5bb9\u7684\u9ad8\u6548\u52a0\u901f\uff0c\u5e2e\u52a9\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\u5728\u90e8\u7f72\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u6d77\u5916\u670d\u52a1\u5668\u96c6\u7fa4\u65f6\uff0c\u83b7\u5f97\u66f4\u4f73\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<h2>\u52a8\u6001\u5185\u5bb9\u52a0\u901f\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>\u52a8\u6001\u5185\u5bb9\u4e0d\u540c\u4e8e\u9759\u6001\u6587\u4ef6\uff0c\u901a\u5e38\u9700\u8981\u5b9e\u65f6\u8ba1\u7b97\u6216\u4e0e\u540e\u7aef\u4ea4\u4e92\u751f\u6210\uff0c\u56e0\u800c\u4e0d\u80fd\u7b80\u5355\u4f9d\u8d56\u7f13\u5b58\u3002\u5b9e\u73b0\u52a8\u6001\u5185\u5bb9\u52a0\u901f\u7684\u5173\u952e\u5728\u4e8e\u5c3d\u53ef\u80fd\u628a\u8ba1\u7b97\u548c\u7f51\u7edc\u4f18\u5316\u4e0b\u6c89\u5230\u8fb9\u7f18\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fb9\u7f18\u8ba1\u7b97\uff08Edge Compute \/ Functions at Edge\uff09\uff1a\u5728\u63a5\u8fd1\u7528\u6237\u7684\u8282\u70b9\u8fd0\u884c\u8f7b\u91cf\u51fd\u6570\uff08\u5982\u8bf7\u6c42\u8def\u7531\u3001\u9274\u6743\u3001A\/B\u6d4b\u8bd5\u3001\u4e2a\u6027\u5316\u6e32\u67d3\uff09\uff0c\u51cf\u5c11\u56de\u6e90\u9891\u6b21\u548c\u8de8\u57df\u7f51\u7edc\u65f6\u5ef6\u3002<\/li>\n<li>\u8fde\u63a5\u4f18\u5316\uff1a\u4f7f\u7528TCP\u4f18\u5316\u3001Keep-Alive\u3001\u8fde\u63a5\u590d\u7528\uff08HTTP\/2\u3001HTTP\/3\/QUIC\uff09\u4e0eTLS\u4f1a\u8bdd\u91cd\u7528\uff0c\u964d\u4f4e\u63e1\u624b\u4e0e\u5e26\u5bbd\u5229\u7528\u6548\u7387\u5f00\u9500\u3002<\/li>\n<li>\u667a\u80fd\u8def\u7531\u4e0e\u8d1f\u8f7d\u5747\u8861\uff1a\u57fa\u4e8eAnycast\u3001GeoDNS\u4e0e\u5b9e\u65f6\u94fe\u8def\u8d28\u91cf\u6d4b\u91cf\u7684\u6d41\u91cf\u8c03\u5ea6\uff0c\u5c06\u7528\u6237\u8bf7\u6c42\u5bfc\u5411\u6700\u4f18\u7684\u8fb9\u7f18\u6216\u540e\u7aef\u3002<\/li>\n<li>\u7f13\u5b58\u7b56\u7565\u7684\u7cbe\u7ec6\u5316\uff1a\u5bf9\u53ef\u7f13\u5b58\u7684\u52a8\u6001\u7247\u6bb5\u91c7\u7528\u8fb9\u7f18\u7247\u6bb5\u7f13\u5b58\uff08Edge-Side Includes, ESI\uff09\u3001\u5206\u533a\u7f13\u5b58\u548cCache-Control\u7cbe\u7ec6\u5316\u63a7\u5236\uff08\u5982 stale-while-revalidate\u3001stale-if-error\uff09\u3002<\/li>\n<li>\u534f\u8bae\u4e0e\u538b\u7f29\u4f18\u5316\uff1a\u652f\u6301Gzip\/Brotli\u3001HTTP\/2 Server Push\u3001gRPC-Web\u5728\u8fb9\u7f18\u7684\u7ec8\u7aef\u4ee3\u7406\u4e0e\u52a0\u901f\u3002<\/li>\n<\/ul>\n<h3>\u8fb9\u7f18\u5316\u67b6\u6784\u7684\u7ec4\u6210\u8981\u7d20<\/h3>\n<p>\u5178\u578b\u7684\u8fb9\u7f18\u5316\u52a8\u6001\u52a0\u901f\u4f53\u7cfb\u5305\u62ec\u591a\u4e2a\u5c42\u6b21\uff1a<\/p>\n<ul>\n<li>\u5168\u7403Anycast\u7f51\u7edc\u4e0ePoP\uff08Point of Presence\uff09\uff1a\u7528\u4e8e\u7f29\u77ed\u7269\u7406\u8ddd\u79bb\u3002<\/li>\n<li>\u8fb9\u7f18\u8282\u70b9\u7684\u8fd0\u884c\u65f6\u73af\u5883\uff1a\u652f\u6301\u65e0\u670d\u52a1\u5668\u51fd\u6570\uff08\u5982Lambda@Edge\u3001Cloudflare Workers\uff09\u6216\u5bb9\u5668\u5316\u670d\u52a1\u3002<\/li>\n<li>\u667a\u80fd\u539f\u70b9\u56de\u6e90\u7f51\u5173\uff08Origin Shield\uff09\uff1a\u51cf\u5c11\u56de\u6e90\u538b\u529b\u5e76\u4f5c\u4e3a\u4e00\u81f4\u6027\u7f13\u5b58\u5c42\u3002<\/li>\n<li>\u5b89\u5168\u6a21\u5757\uff1aWAF\u3001DDoS\u9632\u62a4\u3001\u901f\u7387\u9650\u5236\u548c\u8fb9\u7f18\u9274\u6743\u3002<\/li>\n<li>\u76d1\u63a7\u4e0e\u56de\u6eaf\uff08Tracing\uff09\uff1a\u6355\u83b7\u8bf7\u6c42\u8def\u5f84\u3001Ttfb\u3001\u540e\u7aef\u54cd\u5e94\u65f6\u95f4\uff0c\u652f\u6301SLA\u8bc4\u4f30\u4e0e\u95ee\u9898\u5b9a\u4f4d\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u73b0\u7b56\u7565<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u5bf9\u52a8\u6001\u52a0\u901f\u7684\u9700\u6c42\u5dee\u5f02\u8f83\u5927\uff0c\u4e0b\u9762\u5217\u4e3e\u51e0\u7c7b\u5e38\u89c1\u573a\u666f\u5e76\u7ed9\u51fa\u5b9e\u73b0\u8981\u70b9\u3002<\/p>\n<h3>1. \u7535\u5546\u4e0e\u4e2a\u6027\u5316\u9875\u9762<\/h3>\n<ul>\n<li>\u573a\u666f\u7279\u70b9\uff1a\u9875\u9762\u5927\u91cf\u4e2a\u6027\u5316\u7ec4\u4ef6\uff0c\u5982\u8d2d\u7269\u8f66\u3001\u63a8\u8350\u3001\u7528\u6237\u4fe1\u606f\u3002<\/li>\n<li>\u5b9e\u73b0\u8981\u70b9\uff1a\u91c7\u7528\u8fb9\u7f18\u6e32\u67d3\uff08Edge-Side Rendering\uff09\u628a\u516c\u5171\u9aa8\u67b6\u5728\u8fb9\u7f18\u751f\u6210\uff0c\u4e2a\u6027\u5316\u5c0f\u7247\u6bb5\u901a\u8fc7\u5f02\u6b65\u5408\u5e76\u6216\u5ba2\u6237\u7aef\u6e32\u67d3\u5b8c\u6210\u3002\u5229\u7528ESI\u6216Edge Functions\u62fc\u88c5\u6700\u7ec8\u9875\u9762\uff0c\u51cf\u5c11\u56de\u6e90\u5ef6\u8fdf\u3002<\/li>\n<li>\u6570\u636e\u4e00\u81f4\u6027\uff1a\u5bf9\u8d2d\u7269\u8f66\u7b49\u5173\u952e\u72b6\u6001\u91c7\u7528\u5f3a\u4e00\u81f4\u6216\u4e50\u89c2\u5e76\u53d1\u63a7\u5236\uff0c\u5fc5\u8981\u65f6\u5728\u8fb9\u7f18\u8282\u70b9\u4f7f\u7528\u77ed\u65f6\u4f1a\u8bdd\u7f13\u5b58\u5e76\u5b9a\u671f\u56de\u5199\u539f\u70b9\u3002<\/li>\n<\/ul>\n<h3>2. API\u4e0e\u79fb\u52a8\u5e94\u7528\u540e\u7aef<\/h3>\n<ul>\n<li>\u573a\u666f\u7279\u70b9\uff1aAPI\u8bf7\u6c42\u91cf\u5927\uff0c\u5ef6\u8fdf\u654f\u611f\uff0c\u5305\u542b\u8ba4\u8bc1\u4e0e\u4e1a\u52a1\u903b\u8f91\u3002<\/li>\n<li>\u5b9e\u73b0\u8981\u70b9\uff1a\u5728\u8fb9\u7f18\u5b9e\u73b0API\u7f51\u5173\u529f\u80fd\uff08\u9274\u6743\u3001\u901f\u7387\u9650\u5236\u3001\u6d41\u91cf\u7194\u65ad\uff09\uff0c\u5bf9\u4e8e\u65e0\u72b6\u6001\u6216\u53ef\u88ab\u5e42\u7b49\u5904\u7406\u7684\u63a5\u53e3\u542f\u7528\u8fb9\u7f18\u7f13\u5b58\u6216\u7f13\u5b58\u77ed\u65f6\u7b54\u6848\uff08\u4f8b\u5982\u6392\u884c\u699c\u3001\u5730\u7406\u76f8\u5173\u6570\u636e\uff09\u3002\u4f7f\u7528HTTP\/2\u4e0eQUIC\u964d\u4f4e\u7f51\u7edc\u5ef6\u8fdf\u3002<\/li>\n<li>\u534f\u8bae\u652f\u6301\uff1a\u4e3agRPC\u670d\u52a1\u63d0\u4f9b\u8fb9\u7f18\u4ee3\u7406\uff0c\u6216\u4f7f\u7528gRPC-Web\u5728\u6d4f\u89c8\u5668\u7aef\u53cb\u597d\u63a5\u5165\u3002<\/li>\n<\/ul>\n<h3>3. \u5b9e\u65f6\u4ea4\u4e92\uff08WebSocket\u3001\u5b9e\u65f6\u6e38\u620f\uff09<\/h3>\n<ul>\n<li>\u573a\u666f\u7279\u70b9\uff1a\u6301\u4e45\u8fde\u63a5\u3001\u4f4e\u6296\u52a8\u3002<\/li>\n<li>\u5b9e\u73b0\u8981\u70b9\uff1a\u5728\u8fb9\u7f18PoP\u63d0\u4f9bWebSocket\u4ee3\u7406\u6216\u81ea\u7814\u8fb9\u7f18\u623f\u95f4\uff08room\uff09\u670d\u52a1\uff0c\u5229\u7528Anycast\u548c\u9644\u8fd1PoP\u505a\u8fde\u63a5\u951a\u70b9\uff0c\u540c\u65f6\u901a\u8fc7\u5168\u5c40\u6d88\u606f\u603b\u7ebf\u6216\u8fb9\u7f18\u95f4\u590d\u5236\u4fdd\u8bc1\u72b6\u6001\u540c\u6b65\u3002<\/li>\n<\/ul>\n<h2>\u5173\u952e\u6280\u672f\u7ec6\u8282\u4e0e\u4f18\u5316\u624b\u6bb5<\/h2>\n<p>\u5b9e\u73b0\u4f4e\u5ef6\u8fdf\u4e0e\u9ad8\u5e76\u53d1\u4e0d\u4ec5\u662f\u67b6\u6784\u8bbe\u8ba1\uff0c\u66f4\u4f9d\u8d56\u5927\u91cf\u7ec6\u81f4\u7684\u6280\u672f\u5b9e\u73b0\uff1a<\/p>\n<h3>TCP\/TLS\u4e0eQUIC\u4f18\u5316<\/h3>\n<ul>\n<li>\u542f\u7528TLS 1.3\u4e0e0-RTT\u91cd\u7528\uff0c\u51cf\u5c11\u63e1\u624b\u6210\u672c\uff0c\u4f46\u6ce8\u610f0-RTT\u53ef\u80fd\u5e26\u6765\u7684\u91cd\u653e\u98ce\u9669\u3002<\/li>\n<li>QUIC\/HTTP3\u80fd\u5728\u9ad8\u4e22\u5305\u7f51\u7edc\u4e2d\u663e\u8457\u964d\u4f4e\u5ef6\u8fdf\uff0c\u9002\u5408\u8de8\u56fd\u8bbf\u95ee\u573a\u666f\uff0c\u4f8b\u5982\u9999\u6e2fVPS\u9762\u5411\u4e1c\u5357\u4e9a\u7528\u6237\u65f6\u7684\u52a0\u901f\u6548\u679c\u5f88\u597d\u3002<\/li>\n<li>\u8fde\u63a5\u6c60\u4e0e\u957f\u8fde\u63a5\u590d\u7528\u51cf\u5c11\u65b0\u5efa\u8fde\u63a5\u5f00\u9500\uff0c\u5c24\u5176\u5bf9API\u8c03\u7528\u9891\u7e41\u7684\u573a\u666f\u81f3\u5173\u91cd\u8981\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u7b56\u7565\u4e0eKey\u8bbe\u8ba1<\/h3>\n<ul>\n<li>\u52a8\u6001\u5185\u5bb9\u5e94\u505a\u5206\u5c42\u7f13\u5b58\uff0c\u8fb9\u7f18\u7f13\u5b58\u77ed\u65f6\u70ed\u70b9\uff0c\u56de\u6e90\u7f13\u5b58\u66f4\u957fTTL\u7684\u4e2d\u95f4\u5c42\u3002<\/li>\n<li>\u7f13\u5b58Key\u5e94\u505a\u89c4\u8303\u5316\uff08\u53bb\u6389\u8ddf\u8e2a\u53c2\u6570\u3001\u7edf\u4e00\u5927\u5c0f\u5199\u4e0e\u7f16\u7801\uff09\uff0c\u5e76\u5141\u8bb8\u5bf9\u4e0d\u540c\u53c2\u6570\u7c92\u5ea6\u8fdb\u884c\u63a7\u5236\u3002<\/li>\n<li>\u4f7f\u7528\u53d8\u4f53\u7f13\u5b58\uff08Vary 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vs 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