{"id":209823,"date":"2025-10-23T23:50:08","date_gmt":"2025-10-23T15:50:08","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209823\/"},"modified":"2025-10-23T23:50:10","modified_gmt":"2025-10-23T15:50:10","slug":"cdn-147","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209823\/","title":{"rendered":"CDN\u9009\u578b\u5b9e\u6218\uff1a\u5178\u578b\u6848\u4f8b\u5bf9\u6bd4\u4e0e\u6700\u4f18\u51b3\u7b56"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5316\u4e1a\u52a1\u4e0e\u7528\u6237\u4f53\u9a8c\u538b\u529b\u4e0b\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u6210\u4e3a\u7f51\u7ad9\u548c\u5e94\u7528\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u73af\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u63a2\u8ba8CDN\u7684\u5de5\u4f5c\u539f\u7406\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u3001\u4e0d\u540c\u4f9b\u5e94\u65b9\u6848\u7684\u4f18\u52bf\u5bf9\u6bd4\uff0c\u5e76\u7ed9\u51fa\u5b9e\u6218\u9009\u578b\u5efa\u8bae\u3002\u6587\u4e2d\u5c06\u7ed3\u5408\u533a\u57df\u7279\u70b9\uff08\u5982\u9999\u6e2f\u3001\u7f8e\u56fd\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\uff09\u4e0e\u670d\u52a1\u5668\u7c7b\u578b\uff08\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\uff09\u6765\u8bf4\u660e\u5982\u4f55\u5728\u5b9e\u9645\u90e8\u7f72\u4e2d\u505a\u51fa\u6700\u4f18\u51b3\u7b56\u3002<\/p>\n<h2>CDN 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\u8def\u7531<\/strong>\uff1a\u8282\u70b9\u5206\u5e03\u51b3\u5b9a\u4e86\u7528\u6237\u7684\u7f51\u7edc\u8df3\u6570\u4e0e RTT\u3002\u4f7f\u7528 Anycast \u53ef\u4ee5\u8ba9\u6700\u8fd1\u7684\u8fb9\u7f18\u8282\u70b9\u54cd\u5e94\u8bf7\u6c42\uff0c\u4ece\u800c\u51cf\u5c11 TTFB\uff08Time To First Byte\uff09\u3002<\/li>\n<li><strong>\u534f\u8bae\u4f18\u5316<\/strong>\uff1aHTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u4e0e TLS \u4f1a\u8bdd\u590d\u7528\u3001OCSP stapling \u7b49\uff0c\u80fd\u663e\u8457\u51cf\u5c11\u63e1\u624b\u65f6\u95f4\u548c\u63d0\u5347\u5e76\u53d1\u6548\u7387\uff0c\u5c24\u5176\u5bf9\u79fb\u52a8\u7aef\u4f53\u9a8c\u5f71\u54cd\u660e\u663e\u3002<\/li>\n<li><strong>\u52a8\u6001\u52a0\u901f\u4e0e\u7ebf\u8def\u4f18\u5316<\/strong>\uff1a\u5bf9\u52a8\u6001\u8bf7\u6c42\uff08API\u3001\u767b\u5f55\u3001\u5b9e\u65f6\u4ea4\u4e92\uff09\u91c7\u7528 TCP \u4f18\u5316\u3001\u667a\u80fd\u8def\u7531\u3001TLS \u52a0\u901f\u3001\u8fde\u63a5\u590d\u7528\u6216\u4e13\u6709\u534f\u8bae\u4ee5\u964d\u4f4e\u6296\u52a8\u548c\u4e22\u5305\u5bf9\u6027\u80fd\u7684\u5f71\u54cd\u3002<\/li>\n<li><strong>\u5b89\u5168\u529f\u80fd<\/strong>\uff1aWAF\u3001DDoS \u7f13\u89e3\u3001\u901f\u7387\u9650\u5236\u3001Token \u9a8c\u8bc1\uff08\u4f8b\u5982\u5e26\u7b7e\u540d\u7684 URL\uff09\u80fd\u4fdd\u62a4\u6e90\u7ad9\u5e76\u5141\u8bb8\u5c06\u4e0d\u53ef\u4fe1\u6d41\u91cf\u5728\u8fb9\u7f18\u62e6\u622a\u3002<\/li>\n<li><strong>\u56de\u6e90\u7b56\u7565<\/strong>\uff1aOrigin Shield\u3001\u56de\u6e90\u8bf7\u6c42\u5408\u5e76\uff08stale-while-revalidate\uff09\u3001\u9884\u53d6\/\u9884\u70ed\uff08prefetch\uff09\u548c\u4e3b\u52a8\u5237\u65b0\uff08purge\uff09\u90fd\u662f\u964d\u4f4e\u56de\u6e90\u538b\u529b\u548c\u4fdd\u8bc1\u5185\u5bb9\u4e00\u81f4\u6027\u7684\u5e38\u7528\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u7c92\u5ea6\u4e0e\u7f13\u5b58\u4e00\u81f4\u6027<\/h3>\n<p>\u7f13\u5b58\u7c92\u5ea6\u4ece\u6587\u4ef6\u7ea7\u3001\u8def\u5f84\u7ea7\u5230\u53c2\u6570\u7ea7\u4e0d\u7b49\u3002\u5b9e\u8df5\u4e2d\u901a\u8fc7\u89c4\u5219\u5316 URL\u3001\u53bb\u6389\u65e0\u5173 query string \u6216\u4f7f\u7528 cache key \u81ea\u5b9a\u4e49\u80fd\u63d0\u9ad8\u547d\u4e2d\u3002\u5bf9\u4e8e\u9700\u8981\u5b9e\u65f6\u66f4\u65b0\u7684\u6570\u636e\uff0c\u53ef\u91c7\u7528\u77ed TTL + \u589e\u91cf\u63a8\u9001\u6216 Webhook \u89e6\u53d1\u6e05\u7406\u7b56\u7565\uff0c\u800c\u4e0d\u5efa\u8bae\u9891\u7e41\u5168\u91cf\u6e05\u7406\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u77ac\u65f6\u56de\u6e90\u98ce\u66b4\u3002<\/p>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u533a\u57df\u8003\u91cf<\/h2>\n<p>\u9009\u62e9 CDN \u65f6\u5fc5\u987b\u7ed3\u5408\u4e1a\u52a1\u7c7b\u578b\u4e0e\u76ee\u6807\u7528\u6237\u533a\u57df\uff1a\u9759\u6001\u7ad9\u70b9\u3001\u4e0b\u8f7d\u5206\u53d1\u3001\u6d41\u5a92\u4f53\u3001API \u52a0\u901f\u6216\u6e38\u620f\u90fd\u5bf9 CDN \u7684\u4fa7\u91cd\u70b9\u4e0d\u540c\u3002<\/p>\n<ul>\n<li><strong>\u9759\u6001\u5185\u5bb9\u4e0e\u7ad9\u70b9\u52a0\u901f<\/strong>\uff1a\u5982\u56fe\u7247\u3001CSS\u3001JS \u7b49\uff0c\u91cd\u5728\u9ad8\u7f13\u5b58\u547d\u4e2d\u548c\u8fb9\u7f18\u5206\u53d1\u3002\u82e5\u4e3b\u8981\u7528\u6237\u5728\u9999\u6e2f\u3001\u4e1c\u5357\u4e9a\uff0c\u4f18\u5148\u9009\u62e9\u5728\u9999\u6e2f\u3001\u9999\u6e2fVPS \u6216\u65b0\u52a0\u5761\u8282\u70b9\u5bc6\u96c6\u7684\u4f9b\u5e94\u5546\uff1b\u82e5\u7528\u6237\u96c6\u4e2d\u5728\u7f8e\u56fd\uff0c\u53ef\u4fa7\u91cd\u7f8e\u56fd\u670d\u52a1\u5668\/\u7f8e\u56fdVPS \u7684\u63a5\u5165\u8282\u70b9\u3002<\/li>\n<li><strong>\u6d41\u5a92\u4f53\u4e0e\u5927\u6587\u4ef6\u5206\u53d1<\/strong>\uff1a\u9700\u8981\u9ad8\u5e26\u5bbd\u3001\u7a33\u5b9a\u7684 egress \u548c\u591a\u533a\u57df PoP\u3002\u89c6\u9891\u70b9\u64ad\u53ef\u7ed3\u5408\u5206\u6bb5\u7f13\u5b58\uff08HLS\/DASH\uff09\u4e0e\u8fb9\u7f18\u9884\u70ed\u6280\u672f\u3002<\/li>\n<li><strong>\u52a8\u6001\u5185\u5bb9\u4e0e API<\/strong>\uff1a\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\uff0c\u7f13\u5b58\u547d\u4e2d\u4f4e\u3002\u5e94\u9009\u62e9\u652f\u6301\u52a8\u6001\u52a0\u901f\u3001\u957f\u8fde\u63a5\u548c\u667a\u80fd\u8def\u7531\u7684 CDN\uff0c\u5e76\u5728\u6e90\u7ad9\uff08\u4f8b\u5982\u90e8\u7f72\u65e5\u672c\u670d\u52a1\u5668\u6216\u97e9\u56fd\u670d\u52a1\u5668\uff09\u505a\u8d1f\u8f7d\u5206\u62c5\u3002<\/li>\n<li><strong>\u5168\u7403\u4e1a\u52a1\u4e0e\u591a\u533a\u57df\u8986\u76d6<\/strong>\uff1a\u91c7\u7528\u591a CDN \u6216\u5168\u7403 PoP\uff08\u5317\u7f8e\u3001\u6b27\u6d32\u3001\u4e9a\u592a\uff09\u7b56\u7565\u80fd\u964d\u4f4e\u5355\u70b9\u6545\u969c\u98ce\u9669\uff0c\u6539\u5584\u8de8\u5883\u8bbf\u95ee\uff08\u4f8b\u5982\u9999\u6e2f\u5230\u7f8e\u6d32\u7684\u5ef6\u65f6\u53ef\u663e\u8457\u4e0b\u964d\uff09\u3002<\/li>\n<\/ul>\n<h2>\u4e0d\u540c\u65b9\u6848\u4f18\u52bf\u5bf9\u6bd4\uff08\u4ee5\u5730\u533a\u4e0e\u90e8\u7f72\u65b9\u5f0f\u4e3a\u7ef4\u5ea6\uff09<\/h2>\n<p>\u4ee5\u4e0b\u4ece\u8282\u70b9\u5206\u5e03\u3001\u5ef6\u8fdf\u3001\u6210\u672c\u4e0e\u63a7\u5236\u529b\u7b49\u89d2\u5ea6\u5bf9\u6bd4\u5e38\u89c1\u9009\u9879\uff1a<\/p>\n<ul>\n<li><strong>\u5546\u4e1a CDN\uff08\u5927\u578b\u5382\u5546\uff09<\/strong>\uff1a\u4f18\u70b9\u662f\u5168\u7403 PoP \u5206\u5e03\u5e7f\u3001\u529f\u80fd\u9f50\u5168\uff08WAF\u3001Bot \u7ba1\u7406\u3001\u56fe\u50cf\u5904\u7406\u7b49\uff09\u4e0e SLA\uff1b\u7f3a\u70b9\u901a\u5e38\u662f\u6210\u672c\u8f83\u9ad8\uff0c\u590d\u6742\u5b9a\u4ef7\uff08\u8bf7\u6c42\u6570\u3001\u6d41\u91cf\u3001\u8bf7\u6c42\u5cf0\u503c\u8ba1\u8d39\uff09\u3002\u9002\u5408\u4f01\u4e1a\u7ea7\u5168\u7403\u6d41\u91cf\u3002<\/li>\n<li><strong>\u533a\u57df\u5316 CDN\uff08\u5982\u4ee5\u4e9a\u592a\u4e3a\u4e3b\uff09<\/strong>\uff1a\u5728\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u9996\u5c14\u3001\u65b0\u52a0\u5761\u7b49\u5730\u8282\u70b9\u5bc6\u96c6\uff0c\u9488\u5bf9\u533a\u57df\u7528\u6237\u7684\u5ef6\u8fdf\u66f4\u4f4e\uff0c\u4ef7\u683c\u901a\u5e38\u5177\u5907\u4f18\u52bf\u3002\u9002\u5408\u533a\u57df\u5316\u4e1a\u52a1\u4e0e\u5bf9\u5ef6\u8fdf\u654f\u611f\u7684\u5e94\u7528\u3002<\/li>\n<li><strong>\u81ea\u5efa + \u53cd\u5411\u4ee3\u7406\uff08\u7ed3\u5408\u9999\u6e2f\u670d\u52a1\u5668\/\u7f8e\u56fd\u670d\u52a1\u5668\uff09<\/strong>\uff1a\u901a\u8fc7\u5728\u5173\u952e\u533a\u57df\u90e8\u7f72\u591a\u53f0\u6e90\u7ad9\uff08\u9999\u6e2f\u670d\u52a1\u5668\u4f5c\u4e3a\u4e9a\u6d32\u8fb9\u7f18\u6e90\uff0c\u7f8e\u56fd\u670d\u52a1\u5668\u670d\u52a1\u7f8e\u6d32\uff09+ \u8f7b\u91cf\u7ea7 CDN \u6216\u8d1f\u8f7d\u5747\u8861\u5b9e\u73b0\u8f83\u9ad8\u63a7\u5236\u529b\u4e0e\u6210\u672c\u53ef\u63a7\u6027\uff0c\u4f46\u5bf9\u8fd0\u7ef4\u8981\u6c42\u9ad8\u3002<\/li>\n<li><strong>VPS \u7ec4\u5408\uff08\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\uff09\u52a0\u8f7b\u91cf\u7f13\u5b58<\/strong>\uff1a\u9002\u5408\u6d41\u91cf\u4e2d\u5c0f\u3001\u9884\u7b97\u6709\u9650\u7684\u9879\u76ee\u3002\u7f3a\u70b9\u662f\u53ef\u6269\u5c55\u6027\u4e0e\u6297 DDoS 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CDN\uff1b\u9762\u5411\u7f8e\u6d32\u5219\u9700\u8981\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS \u6709\u8282\u70b9\u652f\u6301\u3002<\/p>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff1a\u5982\u4f55\u505a\u51fa\u6700\u4f18\u51b3\u7b56<\/h2>\n<p>\u9009\u578b\u65f6\u5e94\u7ed3\u5408\u6027\u80fd\u3001\u6210\u672c\u3001\u8fd0\u7ef4\u590d\u6742\u5ea6\u4e0e\u5408\u89c4\u8981\u6c42\uff0c\u9010\u9879\u9a8c\u8bc1\u5e76\u505a\u597d\u8bd5\u9a8c\uff1a<\/p>\n<ul>\n<li><strong>\u660e\u786e\u76ee\u6807 KPI<\/strong>\uff1a\u4f8b\u5982\u9996\u5c4f\u65f6\u95f4\u3001TTFB\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u5e26\u5bbd\u6210\u672c\u548c\u53ef\u7528\u6027\u76ee\u6807\uff08\u4f8b\u5982 99.9%\uff09\u3002<\/li>\n<li><strong>\u505a\u771f\u5b9e\u6d41\u91cf\u6d4b\u8bd5<\/strong>\uff1a\u5229\u7528 A\/B \u6d4b\u8bd5\u6216\u7070\u5ea6\u8def\u7531\uff0c\u628a\u90e8\u5206\u6d41\u91cf\u5f15\u5bfc\u81f3\u5019\u9009 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