{"id":209637,"date":"2025-10-23T19:41:21","date_gmt":"2025-10-23T11:41:21","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209637\/"},"modified":"2025-10-23T19:41:22","modified_gmt":"2025-10-23T11:41:22","slug":"cdn-71","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209637\/","title":{"rendered":"CDN\uff1a\u91cd\u5851\u793e\u4ea4\u5a92\u4f53\u7684\u79d2\u5f00\u4f53\u9a8c\u4e0e\u5168\u7403\u6269\u5c55\u80fd\u529b"},"content":{"rendered":"<p>\u5728\u793e\u4ea4\u5a92\u4f53\u65f6\u4ee3\uff0c\u7528\u6237\u5bf9\u201c\u79d2\u5f00\u201d\u4f53\u9a8c\u7684\u671f\u671b\u5df2\u6210\u4e3a\u8861\u91cf\u5e73\u53f0\u7ade\u4e89\u529b\u7684\u91cd\u8981\u6307\u6807\u3002\u65e0\u8bba\u662f\u56fe\u7247\u7011\u5e03\u6d41\u3001\u77ed\u89c6\u9891\u64ad\u653e\u8fd8\u662f\u5b9e\u65f6\u804a\u5929\u4e92\u52a8\uff0c\u80cc\u540e\u7684\u4ea4\u4ed8\u67b6\u6784\u90fd\u76f4\u63a5\u5f71\u54cd\u7528\u6237\u7559\u5b58\u4e0e\u8f6c\u5316\u3002CDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u4f5c\u4e3a\u5206\u5e03\u5f0f\u4ea4\u4ed8\u7684\u6838\u5fc3\u6280\u672f\uff0c\u6b63\u5728\u6df1\u523b\u91cd\u5851\u793e\u4ea4\u5a92\u4f53\u5728\u6027\u80fd\u3001\u53ef\u6269\u5c55\u6027\u4e0e\u5168\u7403\u8986\u76d6\u4e0a\u7684\u80fd\u529b\u3002<\/p>\n<h2>CDN 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\u4f18\u5316\u3001\u8fde\u63a5\u590d\u7528\u7b49\u6280\u672f\uff0c\u63d0\u5347\u5e76\u53d1\u4e0e\u63e1\u624b\u6548\u7387\u3002<\/li>\n<li><strong>\u5b89\u5168\u4e0e\u8fb9\u7f18\u8ba1\u7b97<\/strong>\uff1a\u96c6\u6210 WAF\u3001DDoS \u9632\u62a4\u3001\u8fb9\u7f18\u51fd\u6570\uff08edge workers\uff09\u4e0e\u52a8\u6001\u5185\u5bb9\u4e2a\u6027\u5316\u5904\u7406\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u7b56\u7565\u4e0e\u7f13\u5b58\u547d\u4e2d\u7387\u4f18\u5316<\/h3>\n<p>\u793e\u4ea4\u5a92\u4f53\u7684\u5185\u5bb9\u7c7b\u578b\u590d\u6742\uff0c\u5408\u7406\u7684\u7f13\u5b58\u7b56\u7565\u81f3\u5173\u91cd\u8981\u3002\u5e38\u7528\u505a\u6cd5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u5229\u7528 <strong>Cache-Control<\/strong>\u3001Expires\u3001ETag \u7b49 HTTP \u5934\u63a7\u5236\u7f13\u5b58\u751f\u547d\u5468\u671f\uff1b\u5bf9\u4e0d\u9891\u7e41\u66f4\u65b0\u7684\u5c01\u9762\u56fe\u7247\u548c\u9759\u6001\u8d44\u6e90\u8bbe\u7f6e\u8f83\u957f\u7684 max-age\u3002<\/li>\n<li>\u5bf9\u52a8\u6001\u4f46\u53ef\u77ed\u671f\u7f13\u5b58\u7684\u8d44\u6e90\uff08\u5982\u7528\u6237\u65f6\u95f4\u7ebf\u7247\u6bb5\uff09\u91c7\u7528\u8f83\u77ed\u7684 TTL\uff0c\u5e76\u7ed3\u5408\u57fa\u4e8e\u7248\u672c\u53f7\u7684\u7f13\u5b58\u952e\uff08\u4f8b\u5982 resource?v=timestamp\uff09\u8fdb\u884c\u5f3a\u5236\u5237\u65b0\u3002<\/li>\n<li>\u4f7f\u7528 <strong>\u5206\u5c42\u7f13\u5b58<\/strong>\uff08edge + regional POP + origin shield\uff09\u63d0\u9ad8\u7f13\u5b58\u547d\u4e2d\u7387\u5e76\u51cf\u8f7b\u6e90\u7ad9\u8d1f\u8f7d\u3002<\/li>\n<li>\u7ec6\u5316\u7f13\u5b58\u952e\uff08\u5305\u542b cookie\u3001Accept-Encoding\u3001User-Agent \u7b49\uff09\u4ee5\u652f\u6301\u591a\u5a92\u4f53\u7f16\u7801\u53d8\u4f53\uff08AV1\/H.264\/H.265\uff09\u4e0e\u56fe\u50cf\u5c3a\u5bf8\u54cd\u5e94\u5f0f\u88c1\u526a\u3002<\/li>\n<\/ul>\n<h2>\u793e\u4ea4\u5a92\u4f53\u5e38\u89c1\u5e94\u7528\u573a\u666f\u4e0e CDN \u7684\u4f5c\u7528<\/h2>\n<h3>\u56fe\u7247\/\u77ed\u89c6\u9891\u7684\u5feb\u901f\u5206\u53d1<\/h3>\n<p>\u56fe\u7247\u4e0e\u77ed\u89c6\u9891\u662f\u793e\u5a92\u5e73\u53f0\u7684\u6838\u5fc3\u6d41\u91cf\u6765\u6e90\u3002CDN \u5728\u6b64\u573a\u666f\u7684\u6280\u672f\u8981\u70b9\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fb9\u7f18\u8f6c\u7801\u4e0e\u5207\u7247\uff1a\u5c06\u539f\u59cb\u89c6\u9891\u5728\u8fb9\u7f18\u8fdb\u884c\u591a\u7801\u7387\u7801\u6d41\u5207\u7247\uff08HLS\/DASH\uff09\uff0c\u914d\u5408 ABR\uff08\u81ea\u9002\u5e94\u7801\u7387\uff09\u5b9e\u73b0\u79d2\u5f00\u4e0e\u987a\u7545\u64ad\u653e\u3002<\/li>\n<li>\u8fb9\u7f18\u89c6\u9891\u7f13\u5b58\u4e0e\u9884\u53d6\uff1a\u5bf9\u70ed\u95e8\u89c6\u9891\u8fdb\u884c\u4e3b\u52a8\u9884\u70ed\uff08prefetch\uff09\u4e0e\u7f13\u5b58\uff0c\u540c\u65f6\u901a\u8fc7 LRU\/LFU \u7b49\u7b56\u7565\u7ba1\u7406\u6709\u9650\u7684\u8fb9\u7f18\u5b58\u50a8\u3002<\/li>\n<li>\u56fe\u50cf\u5b9e\u65f6\u88c1\u526a\u4e0e WebP\/AVIF \u652f\u6301\uff1a\u6839\u636e\u5ba2\u6237\u7aef\u80fd\u529b\u8fd4\u56de\u4e0d\u540c\u683c\u5f0f\u4e0e\u5206\u8fa8\u7387\uff0c\u51cf\u5c11\u5e26\u5bbd\u4e0e\u52a0\u8f7d\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<h3>\u5b9e\u65f6\u4e92\u52a8\uff08\u804a\u5929\u3001\u901a\u77e5\u3001\u76f4\u64ad\uff09<\/h3>\n<p>\u5b9e\u65f6\u7279\u6027\u5bf9\u5ef6\u8fdf\u975e\u5e38\u654f\u611f\u3002CDN \u652f\u6301\u7684\u5173\u952e\u6280\u672f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>WebSocket \/ HTTP\/2 Server Push \/ SSE \u7684\u8fb9\u7f18\u4ee3\u7406\u4e0e\u957f\u8fde\u63a5\u4f18\u5316\uff0c\u51cf\u5c11\u63e1\u624b\u4e0e\u91cd\u8fde\u5e26\u6765\u7684\u5ef6\u8fdf\u3002<\/li>\n<li>\u5c06\u5b9e\u65f6\u4fe1\u4ee4\u6d41\u91cf\u901a\u8fc7\u8fb9\u7f18\u8def\u7531\u5230\u6700\u8fd1\u7684\u6570\u636e\u4e2d\u5fc3\uff0c\u7ed3\u5408 WebRTC \u7684 STUN\/TURN \u4e2d\u7ee7\u80fd\u529b\u4ee5\u4f18\u5316\u70b9\u5bf9\u70b9\u6216\u591a\u70b9\u76f4\u64ad\u3002<\/li>\n<li>\u8fb9\u7f18\u51fd\u6570\u7528\u4e8e\u6d88\u606f\u9884\u5904\u7406\u3001\u9274\u6743\u4e0e\u901f\u7387\u9650\u5236\uff0c\u964d\u4f4e\u56de\u6e90\u538b\u529b\u5e76\u63d0\u5347\u5e76\u53d1\u627f\u8f7d\u3002<\/li>\n<\/ul>\n<h3>API \u52a0\u901f\u4e0e\u79fb\u52a8\u7aef\u4f18\u5316<\/h3>\n<p>\u793e\u5a92\u540e\u7aef API \u7684\u54cd\u5e94\u901f\u5ea6\u76f4\u63a5\u5f71\u54cd\u9875\u9762\u6e32\u67d3\u4e0e\u9996\u5c4f\u65f6\u95f4\u3002CDN \u53ef\u5bf9 API \u505a\u5230\uff1a<\/p>\n<ul>\n<li>\u667a\u80fd\u8def\u7531\u4e0e\u8fde\u63a5\u590d\u7528\uff0c\u51cf\u5c11\u8de8\u6d0b RTT\u3002<\/li>\n<li>\u5bf9\u53ef\u7f13\u5b58\u7684 API \u54cd\u5e94\u8bbe\u7f6e\u5fae\u7f13\u5b58\uff08\u5982 1-5 \u79d2\uff09\u4ee5\u5e94\u5bf9\u77ed\u65f6\u95f4\u5185\u7684\u9ad8\u5e76\u53d1\u8bbf\u95ee\uff08\u4f8b\u5982\u70ed\u95e8\u5e16\u5b50\u7684\u77ed\u65f6\u95f4\u7a81\u589e\uff09\u3002<\/li>\n<li>\u8fb9\u7f18\u4fa7\u8fdb\u884c\u538b\u7f29\uff08Brotli\u3001gzip\uff09\u4e0e\u5185\u5bb9\u534f\u5546\uff08Accept-Encoding\uff09\uff0c\u5e76\u5bf9\u79fb\u52a8\u7f51\u7edc\u8fdb\u884c\u4f18\u5316\uff08TCP\/TLS \u8c03\u4f18\u3001\u63a8\u9001\u5408\u5e76\uff09\u3002<\/li>\n<\/ul>\n<h2>\u4e0e\u4f20\u7edf\u5355\u70b9\u90e8\u7f72\uff08\u5982\u5355\u4e00\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u5bf9\u6bd4\u4f18\u52bf<\/h2>\n<p>\u5c06\u793e\u4ea4\u5e73\u53f0\u4ec5\u90e8\u7f72\u5728\u5355\u4e00\u533a\u57df\u670d\u52a1\u5668\uff08\u65e0\u8bba\u662f\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u8fd8\u662f\u65e5\u672c\u670d\u52a1\u5668\uff09\u5b58\u5728\u660e\u663e\u74f6\u9888\uff1a<\/p>\n<ul>\n<li>\u5168\u7403\u7528\u6237\u8bbf\u95ee\u5ef6\u8fdf\u9ad8\uff0c\u8de8\u6d0b RTT \u5bfc\u81f4\u9996\u5c4f\u65f6\u95f4\u4e0e\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u660e\u663e\u53d8\u957f\u3002<\/li>\n<li>\u6e90\u7ad9\u5e26\u5bbd\u4e0e\u5e76\u53d1\u627f\u8f7d\u80fd\u529b\u6210\u4e3a\u74f6\u9888\uff0c\u5bb9\u6613\u5728\u6d41\u91cf\u5cf0\u503c\u65f6\u53d1\u751f\u62e5\u585e\u6216\u5b95\u673a\u3002<\/li>\n<li>\u5355\u70b9\u906d\u53d7 DDoS \u653b\u51fb\u98ce\u9669\u66f4\u9ad8\uff0c\u6062\u590d\u4e0e\u6269\u5bb9\u6162\u3002<\/li>\n<\/ul>\n<p>\u800c\u90e8\u7f72 CDN \u540e\u53ef\u4ee5\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li><strong>\u63a5\u8fd1\u7528\u6237\u7684\u8fb9\u7f18\u4ea4\u4ed8<\/strong>\uff0c\u6781\u5927\u964d\u4f4e\u5ef6\u8fdf\u5e76\u63d0\u5347\u79d2\u5f00\u4f53\u9a8c\uff1b<\/li>\n<li>\u901a\u8fc7 POP \u5206\u6563\u6d41\u91cf\uff0c\u63d0\u5347\u6297\u538b\u80fd\u529b\u4e0e\u53ef\u7528\u6027\uff1b<\/li>\n<li>\u914d\u5408\u591a\u533a\u57df\u6e90\u7ad9\uff08\u9999\u6e2f\u3001\u7f8e\u56fd\u3001\u65b0\u52a0\u5761\u3001\u97e9\u56fd\u3001\u65e5\u672c\u7b49\uff09\u5b9e\u73b0\u4e3b\u52a8\u5c31\u8fd1\u56de\u6e90\u4e0e\u5bb9\u707e\u7b56\u7565\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae\uff08\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff09<\/h2>\n<h3>\u8bc4\u4f30\u6307\u6807\u4e0e\u6d4b\u8bd5\u65b9\u6cd5<\/h3>\n<p>\u9009\u62e9 CDN 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<\/li>\n<li>\u76d1\u63a7\u4e0e\u65e5\u5fd7\uff1a\u5b9e\u65f6\u6027\u80fd\u6307\u6807\u3001Trace\u3001\u539f\u59cb\u65e5\u5fd7\u5bfc\u51fa\u4e0e\u5206\u6790\u80fd\u529b\uff08\u4fbf\u4e8e\u5b9a\u4f4d\u6162\u8bf7\u6c42\uff09\u3002<\/li>\n<\/ul>\n<p>\u5efa\u8bae\u901a\u8fc7\u771f\u5b9e\u7528\u6237\u76d1\u6d4b\uff08RUM\uff09\u3001\u5408\u6210\u6d4b\u8bd5\uff08\u5408\u89c4\u7684\u5168\u7403\/\u533a\u57df\u5316\u538b\u6d4b\uff09\u4e0e\u9759\u6001\u57fa\u7ebf\u6d4b\u8bd5\u6765\u9a8c\u8bc1\u4f9b\u5e94\u5546\u8868\u73b0\u3002\u53e6\u5916\uff0c\u53ef\u5728\u591a\u533a\u57df\uff08\u5982\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\uff09\u90e8\u7f72\u5c0f\u6d41\u91cf\u63a2\u9488\u4ee5\u6bd4\u8f83\u56de\u6e90\u7b56\u7565\u4e0e\u5ef6\u8fdf\u3002<\/p>\n<h3>\u4e0e\u57fa\u7840\u8bbe\u65bd\uff08\u670d\u52a1\u5668\u3001VPS\u3001\u57df\u540d\uff09\u534f\u540c<\/h3>\n<p>CDN 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