{"id":209679,"date":"2025-10-23T20:40:29","date_gmt":"2025-10-23T12:40:29","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209679\/"},"modified":"2025-10-23T20:40:29","modified_gmt":"2025-10-23T12:40:29","slug":"cdn-89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209679\/","title":{"rendered":"CDN\u52a0\u901f\u79fb\u52a8\u7535\u5546\uff1a\u63d0\u5347\u52a0\u8f7d\u901f\u5ea6\u4e0e\u8f6c\u5316\u7387\u7684\u5173\u952e"},"content":{"rendered":"<p>\u5728\u79fb\u52a8\u7535\u5546\u73af\u5883\u4e2d\uff0c\u9875\u9762\u52a0\u8f7d\u901f\u5ea6\u76f4\u63a5\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u4e0e\u8f6c\u5316\u7387\u3002\u968f\u7740\u79fb\u52a8\u8bbe\u5907\u4e0e\u7f51\u7edc\u73af\u5883\u591a\u6837\u5316\uff0c\u4f20\u7edf\u96c6\u4e2d\u5f0f\u670d\u52a1\u5668\u67b6\u6784\u5df2\u96be\u4ee5\u6ee1\u8db3\u5168\u7403\u6216\u8de8\u533a\u57df\u4e1a\u52a1\u7684\u5b9e\u65f6\u9700\u6c42\u3002\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u901a\u8fc7\u5c06\u9759\u6001\u548c\u90e8\u5206\u52a8\u6001\u5185\u5bb9\u5206\u53d1\u5230\u9760\u8fd1\u7528\u6237\u7684\u8282\u70b9\uff08POP\uff09\uff0c\u5df2\u6210\u4e3a\u79fb\u52a8\u7535\u5546\u52a0\u901f\u7684\u6838\u5fc3\u6280\u672f\u4e4b\u4e00\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\uff0c\u4ece\u539f\u7406\u3001\u5e94\u7528\u573a\u666f\u3001\u6280\u672f\u7ec6\u8282\u5230\u9009\u8d2d\u5efa\u8bae\u5168\u9762\u89e3\u6790\u5982\u4f55\u5229\u7528CDN\u63d0\u5347\u79fb\u52a8\u7aef\u52a0\u8f7d\u901f\u5ea6\u4e0e\u8f6c\u5316\u7387\u3002<\/p>\n<h2>CDN \u7684\u57fa\u672c\u539f\u7406\u4e0e\u5173\u952e\u7ec4\u6210<\/h2>\n<p>CDN \u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7f13\u5b58\u548c\u8def\u7531\u7cfb\u7edf\uff0c\u4e3b\u8981\u7531\u4ee5\u4e0b\u7ec4\u4ef6\u7ec4\u6210\uff1a<\/p>\n<ul>\n<li>\u8fb9\u7f18\u8282\u70b9\uff08POP\uff09\uff1a\u90e8\u7f72\u5728\u63a5\u8fd1\u7528\u6237\u7684\u5730\u7406\u4f4d\u7f6e\uff0c\u7f13\u5b58\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001JS\u3001CSS\uff09\u4ee5\u53ca\u53ef\u7f13\u5b58\u7684\u52a8\u6001\u7247\u6bb5\u3002<\/li>\n<li>\u56de\u6e90\uff08Origin\uff09\uff1a\u901a\u5e38\u4e3a\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u5176\u5b83\u6d77\u5916\u670d\u52a1\u5668\uff0c\u8d1f\u8d23\u672a\u547d\u4e2d\u7f13\u5b58\u65f6\u63d0\u4f9b\u539f\u59cb\u5185\u5bb9\u3002<\/li>\n<li>\u5168\u5c40\u8c03\u5ea6\u4e0e DNS \u8def\u7531\uff1a\u6839\u636e\u7528\u6237\u5730\u7406\u4f4d\u7f6e\u3001\u8282\u70b9\u8d1f\u8f7d\u548c\u7f51\u7edc\u6761\u4ef6\uff0c\u5c06\u8bf7\u6c42\u5f15\u5bfc\u81f3\u6700\u4f18\u8282\u70b9\u3002<\/li>\n<li>\u63a7\u5236\u9762\u4e0e\u7ba1\u7406\u63a5\u53e3\uff1a\u7528\u4e8e\u7f13\u5b58\u7b56\u7565\u3001\u5237\u65b0\uff08purge\uff09\u3001\u65e5\u5fd7\u4e0e\u5b89\u5168\u7b56\u7565\uff08WAF\u3001DDoS\uff09\u914d\u7f6e\u3002<\/li>\n<\/ul>\n<p>\u5728\u79fb\u52a8\u7535\u5546\u4e2d\uff0c\u7528\u6237\u8bf7\u6c42\u901a\u5e38\u901a\u8fc7 DNS \u6216 Anycast \u8def\u7531\u88ab\u5bfc\u5411\u6700\u8fd1\u7684 POP\uff0c\u82e5\u8282\u70b9\u6709\u7f13\u5b58\u5219\u76f4\u63a5\u54cd\u5e94\uff1b\u5426\u5219\u8fb9\u7f18\u8282\u70b9\u4f1a\u4ee5\u4f18\u5316\u7684\u56de\u6e90\u7b56\u7565\u4ece\u9999\u6e2fVPS\u6216\u7f8e\u56fdVPS\u7b49 origin \u62c9\u53d6\u6570\u636e\u5e76\u7f13\u5b58\uff0c\u4ee5\u4f9b\u540e\u7eed\u8bf7\u6c42\u52a0\u901f\u3002<\/p>\n<h3>\u7f13\u5b58\u7b56\u7565\u4e0e\u4e00\u81f4\u6027<\/h3>\n<p>\u6709\u6548\u7684\u7f13\u5b58\u7b56\u7565\u662f\u63d0\u5347\u547d\u4e2d\u7387\u4e0e\u964d\u4f4e\u56de\u6e90\u538b\u529b\u7684\u5173\u952e\u3002\u5e38\u7528\u505a\u6cd5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>Cache-Control \u4e0e Expires\uff1a\u57fa\u4e8e\u6587\u4ef6\u7c7b\u578b\u8bbe\u7f6e\u4e0d\u540c\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u5982\u56fe\u7247\u957f\u671f\u7f13\u5b58\u3001HTML \u77ed\u7f13\u5b58\u6216\u4f7f\u7528\u534f\u5546\u7f13\u5b58\uff08ETag\/Last-Modified\uff09\u3002<\/li>\n<li>\u5206\u5c42\u7f13\u5b58\uff08Tiered Caching\uff09\uff1a\u5728\u591a\u4e2a\u533a\u57df\u7684\u8282\u70b9\u4e4b\u95f4\u5efa\u7acb\u6c47\u805a\u5c42\uff0c\u51cf\u5c11\u8de8\u6d0b\u56de\u6e90\u6b21\u6570\uff0c\u5c24\u5176\u5bf9\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u56de\u6e90\u5230\u9999\u6e2f\u6216\u7f8e\u56fd origin \u6709\u5229\u3002<\/li>\n<li>\u4e3b\u52a8\u5237\u65b0\uff08Purge\uff09\u4e0e\u56de\u6eda\uff1a\u53d1\u5e03\u4fc3\u9500\u9875\u9762\u6216\u66f4\u6362\u6a21\u677f\u65f6\uff0c\u5feb\u901f\u6e05\u7406\u8fb9\u7f18\u7f13\u5b58\u4ee5\u4fdd\u8bc1\u5185\u5bb9\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2>\u9488\u5bf9\u79fb\u52a8\u7aef\u7684\u4f18\u5316\u6280\u672f\u7ec6\u8282<\/h2>\n<p>\u79fb\u52a8\u7aef\u7684\u7f51\u7edc\u6ce2\u52a8\u3001\u5e26\u5bbd\u9650\u5236\u53ca\u8bbe\u5907\u80fd\u529b\u5dee\u5f02\u8981\u6c42\u989d\u5916\u7684\u4f18\u5316\u624b\u6bb5\uff1a<\/p>\n<h3>\u4f20\u8f93\u5c42\u4e0e\u534f\u8bae\u4f18\u5316<\/h3>\n<ul>\n<li><strong>HTTP\/2 \u4e0e HTTP\/3\uff08QUIC\uff09<\/strong>\uff1a\u591a\u8def\u590d\u7528\u4e0e\u5934\u90e8\u538b\u7f29\u51cf\u5c11 RTT\uff0cQUIC \u5728\u9ad8\u4e22\u5305\u73af\u5883\u4e0b\u8868\u73b0\u66f4\u4f73\uff0c\u660e\u663e\u964d\u4f4e\u79fb\u52a8\u7f51\u7edc\u4e0b\u7684\u5ef6\u8fdf\u3002<\/li>\n<li><strong>TLS \u4f18\u5316<\/strong>\uff1a\u542f\u7528 TLS 1.3\u30010-RTT\uff08\u8c28\u614e\u4f7f\u7528\uff09\u548c\u4f1a\u8bdd\u6062\u590d\u53ef\u4ee5\u51cf\u5c11\u63e1\u624b\u5ef6\u8fdf\uff1b\u8fb9\u7f18 TLS \u7ec8\u7aef\u53ef\u907f\u514d\u9891\u7e41\u8de8\u6d0b\u63e1\u624b\u3002<\/li>\n<li><strong>TCP \u8c03\u4f18<\/strong>\uff1a\u5229\u7528\u62e5\u585e\u63a7\u5236\uff08BBR\uff09\u548c\u5feb\u901f\u91cd\u4f20\uff0c\u63d0\u9ad8\u5728 4G\/5G \u6ce2\u52a8\u7f51\u7edc\u4e0b\u7684\u541e\u5410\u548c\u7a33\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h3>\u8d44\u6e90\u4e0e\u5185\u5bb9\u81ea\u9002\u5e94<\/h3>\n<ul>\n<li><strong>\u56fe\u7247\u4e0e\u5a92\u4f53\u6309\u9700\u4e0b\u53d1<\/strong>\uff1a\u8fb9\u7f18\u8fdb\u884c\u56fe\u7247\u683c\u5f0f\u8f6c\u6362\uff08WebP\/AVIF\uff09\u3001\u6309\u9700\u7f29\u653e\uff08responsive images\uff09\u548c\u61d2\u52a0\u8f7d\uff0c\u663e\u8457\u51cf\u5c0f\u9996\u5c4f\u4f53\u79ef\u3002<\/li>\n<li><strong>\u52a8\u6001\u5185\u5bb9\u4e2a\u6027\u5316\u7f13\u5b58<\/strong>\uff1a\u5bf9\u7528\u6237\u4f1a\u8bdd\u3001\u4ef7\u683c\u6216\u5e93\u5b58\u7b49\u5feb\u901f\u53d8\u5316\u7684\u5185\u5bb9\u91c7\u7528 Edge Side Includes\uff08ESI\uff09\u6216\u8fb9\u7f18\u811a\u672c\uff08Edge Functions\uff09\u5b9e\u73b0\u5c40\u90e8\u62fc\u88c5\uff0c\u65e2\u4fdd\u8bc1\u4e2a\u6027\u5316\u53c8\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\u3002<\/li>\n<li><strong>\u8d44\u6e90\u5408\u5e76\u4e0e\u5206\u7247<\/strong>\uff1a\u5728\u4fdd\u8bc1\u5e76\u884c\u4e0b\u8f7d\u6548\u7387\u7684\u524d\u63d0\u4e0b\u5408\u7406\u5408\u5e76\u5173\u952e CSS\/JS \u6216\u5229\u7528 HTTP\/2 \u591a\u8def\u590d\u7528\u51cf\u5c11\u8bf7\u6c42\u6570\u3002<\/li>\n<\/ul>\n<h3>\u79fb\u52a8\u7f51\u7edc\u611f\u77e5\u4e0e\u667a\u80fd\u8def\u7531<\/h3>\n<p>\u5148\u8fdb\u7684 CDN \u4f1a\u6839\u636e\u5ba2\u6237\u7aef\u7f51\u7edc\u7c7b\u578b\uff08Wi-Fi\/4G\/5G\uff09\u3001\u5ef6\u8fdf\u4e0e\u4e22\u5305\u7387\u9009\u62e9\u6700\u4f18\u56de\u6e90\u8def\u5f84\u6216\u8282\u70b9\u3002For example\uff0c\u5904\u4e8e\u4e1c\u4e9a\u5730\u533a\u7684\u7528\u6237\u53ef\u88ab\u8c03\u5ea6\u5230\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u6216\u9999\u6e2f\u8282\u70b9\u4ee5\u964d\u4f4e\u5ef6\u8fdf\uff0c\u800c\u8de8\u592a\u5e73\u6d0b\u6d41\u91cf\u5219\u4f18\u5148\u4f7f\u7528\u8fde\u63a5\u5230\u7f8e\u56fd\u670d\u52a1\u5668\u7684\u9ad8\u901f\u94fe\u8def\u3002<\/p>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u6210\u529f\u5b9e\u8df5<\/h2>\n<p>\u5178\u578b\u79fb\u52a8\u7535\u5546\u573a\u666f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u5168\u7403\u4fc3\u9500\u6d3b\u52a8\uff1a\u77ed\u65f6\u95f4\u5185\u6d41\u91cf\u66b4\u589e\uff0cCDN \u7684\u5f39\u6027\u7f13\u5b58\u3001\u901f\u7387\u9650\u5236\u4e0e DDoS \u9632\u62a4\u80fd\u4fdd\u62a4 origin\uff08\u5982\u9999\u6e2f\u670d\u52a1\u5668\uff09\u514d\u906d\u8fc7\u8f7d\u3002<\/li>\n<li>\u591a\u8bed\u8a00\/\u591a\u533a\u57df\u7ad9\u70b9\uff1a\u6839\u636e\u7528\u6237\u5730\u7406\u5b9a\u4f4d\u63d0\u4f9b\u672c\u5730\u5316\u5185\u5bb9\uff0c\u540c\u65f6\u4f7f\u7528\u5730\u57df\u611f\u77e5\u8def\u7531\u5c06\u7528\u6237\u547d\u4e2d\u6700\u8fd1\u7684 POP\u3002<\/li>\n<li>\u79fb\u52a8APP \u4e0e PWA\uff1a\u5c06\u9759\u6001\u8d44\u6e90\u548c\u90e8\u5206 API \u7f13\u5b58\u5230\u8fb9\u7f18\uff0c\u914d\u5408\u5ba2\u6237\u7aef\u7f13\u5b58\u7b56\u7565\uff0c\u63d0\u5347\u51b7\u542f\u52a8\u901f\u5ea6\u4e0e\u79bb\u7ebf\u4f53\u9a8c\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1aCDN \u4e0e\u4f20\u7edf\u52a0\u901f\u65b9\u6848<\/h2>\n<p>\u4e0e\u4ec5\u9760\u63d0\u5347 origin \u914d\u7f6e\uff08\u4f8b\u5982\u66f4\u6362\u66f4\u9ad8\u89c4\u683c\u7684\u9999\u6e2fVPS \u6216\u7f8e\u56fdVPS\uff09\u76f8\u6bd4\uff0cCDN \u5177\u5907\u4ee5\u4e0b\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u51cf\u5c11\u5ef6\u8fdf\uff1a<\/strong>\u8fb9\u7f18\u8282\u70b9\u9760\u8fd1\u7528\u6237\uff0c\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u548c\u9875\u9762\u9996\u6b21\u7ed8\u5236\uff08FCP\uff09\u663e\u8457\u6539\u5584\u3002<\/li>\n<li><strong>\u66f4\u9ad8\u53ef\u7528\u6027\uff1a<\/strong>\u8de8\u8282\u70b9\u5197\u4f59\u548c\u667a\u80fd\u8c03\u5ea6\u63d0\u5347\u6297\u6545\u969c\u80fd\u529b\uff0c\u964d\u4f4e\u5355\u70b9\u6545\u969c\u98ce\u9669\u3002<\/li>\n<li><strong>\u6210\u672c\u6548\u7387\uff1a<\/strong>\u901a\u8fc7\u7f13\u5b58\u51cf\u5c11\u56de\u6e90\u5e26\u5bbd\u4e0e\u670d\u52a1\u5668\u8d1f\u8f7d\uff0c\u76f8\u5bf9\u4e8e\u6269\u5bb9 origin \u66f4\u5177\u6210\u672c\u6548\u76ca\u3002<\/li>\n<li><strong>\u5b89\u5168\u9632\u62a4\uff1a<\/strong>\u5185\u7f6e WAF\u3001DDoS \u9632\u62a4\u4e0e\u901f\u7387\u9650\u5236\uff0c\u4fdd\u62a4\u57df\u540d\u6ce8\u518c\u540e\u7684\u7ebf\u4e0a\u8d44\u4ea7\u4e0e\u670d\u52a1\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae<\/h2>\n<p>\u9009\u62e9\u5408\u9002\u7684 CDN \u670d\u52a1\u4e0e\u914d\u5957\u57fa\u7840\u8bbe\u65bd\u65f6\uff0c\u5e94\u7efc\u5408\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u8282\u70b9\u8986\u76d6\u4e0e\u8282\u70b9\u8d28\u91cf\uff1a<\/strong>\u5982\u679c\u76ee\u6807\u7528\u6237\u4e3b\u8981\u5728\u4e1c\u4e9a\u5e02\u573a\uff0c\u4f18\u5148\u9009\u62e9\u5728\u9999\u6e2f\u3001\u65b0\u52a0\u5761\u3001\u65e5\u672c\u3001\u97e9\u56fd\u7b49\u5730\u62e5\u6709 POP \u7684 CDN\uff1b\u9762\u5411\u7f8e\u6d32\u5219\u9700\u8981\u8986\u76d6\u7f8e\u56fd\u8282\u70b9\u3002<\/li>\n<li><strong>\u4e0e\u73b0\u6709\u670d\u52a1\u5668\u7684\u7f51\u7edc\u4e92\u901a\uff1a<\/strong>\u82e5 origin \u90e8\u7f72\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\uff0c\u68c0\u67e5 CDN \u8fb9\u7f18\u4e0e origin \u4e4b\u95f4\u7684\u56de\u6e90\u94fe\u8def\u65f6\u5ef6\u4e0e\u5e26\u5bbd\uff0c\u6216\u8003\u8651\u90e8\u7f72\u4e2d\u8f6c\u8282\u70b9\/\u8fb9\u7f18\u7f13\u5b58\u5c42\u3002<\/li>\n<li><strong>\u8fb9\u7f18\u8ba1\u7b97\u80fd\u529b\uff1a<\/strong>\u652f\u6301\u8fb9\u7f18\u811a\u672c\u6216\u51fd\u6570\u53ef\u4ee5\u5c06\u90e8\u5206\u4e1a\u52a1\u903b\u8f91\u4e0b\u653e\u5230 POP\uff08\u5982 A\/B \u6d4b\u8bd5\u3001\u4e2a\u6027\u5316\u62fc\u63a5\uff09\uff0c\u51cf\u5c0f origin \u538b\u529b\u3002<\/li>\n<li><strong>\u5b89\u5168\u4e0e\u5408\u89c4\uff1a<\/strong>\u786e\u4fdd CDN 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