{"id":209523,"date":"2025-10-23T16:19:08","date_gmt":"2025-10-23T08:19:08","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209523\/"},"modified":"2025-10-23T16:19:09","modified_gmt":"2025-10-23T08:19:09","slug":"cdn-22","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209523\/","title":{"rendered":"\u4e00\u6587\u8bfb\u61c2CDN\u7f13\u5b58\u5237\u65b0\u673a\u5236\uff1a\u539f\u7406\u3001\u7b56\u7565\u4e0e\u5b9e\u6218\u6280\u5de7"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5316\u7684\u4e92\u8054\u7f51\u73af\u5883\u4e2d\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u662f\u63d0\u5347\u7f51\u7ad9\u54cd\u5e94\u901f\u5ea6\u548c\u7a33\u5b9a\u6027\u7684\u6838\u5fc3\u6280\u672f\u4e4b\u4e00\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u548c\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u7406\u89e3CDN\u7f13\u5b58\u5237\u65b0\u673a\u5236\uff0c\u4e0d\u4ec5\u6709\u52a9\u4e8e\u4fdd\u8bc1\u5185\u5bb9\u4e00\u81f4\u6027\uff0c\u8fd8\u80fd\u5728\u53d1\u5e03\u9891\u7e41\u66f4\u65b0\u7684\u573a\u666f\uff08\u5982\u7535\u5546\u6d3b\u52a8\u3001\u65b0\u95fb\u53d1\u5e03\uff09\u4e2d\u907f\u514d\u7528\u6237\u770b\u5230\u8fc7\u671f\u5185\u5bb9\u3002\u672c\u6587\u5c06\u6df1\u5165\u89e3\u6790CDN\u7f13\u5b58\u5237\u65b0\u539f\u7406\u3001\u5e38\u89c1\u7b56\u7565\u4e0e\u5b9e\u6218\u6280\u5de7\uff0c\u7ed3\u5408\u5b9e\u9645\u8fd0\u7ef4\u573a\u666f\u7ed9\u51fa\u53ef\u6267\u884c\u7684\u5efa\u8bae\uff0c\u5e2e\u52a9\u4f60\u5728\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u6d77\u5916\u670d\u52a1\u5668\u7b49\u57fa\u7840\u8bbe\u65bd\u65f6\u4f18\u5316\u7f13\u5b58\u7b56\u7565\u3002<\/p>\n<h2>CDN\u7f13\u5b58\u5237\u65b0\u57fa\u672c\u539f\u7406<\/h2>\n<p>CDN\u7684\u6838\u5fc3\u5728\u4e8e\u5c06\u5185\u5bb9\u7f13\u5b58\u5728\u9760\u8fd1\u7528\u6237\u7684\u8fb9\u7f18\u8282\u70b9\uff08edge\uff09\u4e0a\uff0c\u51cf\u5c11\u5230\u539f\u70b9\u670d\u52a1\u5668\uff08origin\uff09\u7684\u8bf7\u6c42\u6b21\u6570\u3002\u7f13\u5b58\u5237\u65b0\uff08cache invalidation \/ purge\uff09\u662f\u8ba9\u8fb9\u7f18\u8282\u70b9\u4e22\u5f03\u6216\u66f4\u65b0\u5df2\u7f13\u5b58\u8d44\u6e90\u7684\u8fc7\u7a0b\u3002\u5e38\u89c1\u5237\u65b0\u6a21\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>TTL\uff08Time To Live\uff09\u9a71\u52a8\u5237\u65b0<\/strong>\uff1a\u901a\u8fc7Cache-Control\/max-age\u6216s-maxage\u8bbe\u7f6e\u8d44\u6e90\u7684\u751f\u547d\u5468\u671f\uff0c\u8fc7\u671f\u540e\u8fb9\u7f18\u8282\u70b9\u91cd\u65b0\u5411origin\u9a8c\u8bc1\u6216\u62c9\u53d6\u3002<\/li>\n<li><strong>\u4e3b\u52a8\u6e05\u9664\uff08Purge\/Invalidate\uff09<\/strong>\uff1a\u901a\u8fc7CDN\u63d0\u4f9b\u7684API\u6216\u63a7\u5236\u9762\u677f\uff0c\u5b9e\u65f6\u5220\u9664\u6307\u5b9aURL\u6216\u4e00\u7ec4\u8d44\u6e90\u7684\u7f13\u5b58\u3002<\/li>\n<li><strong>\u7248\u672c\u5316\uff08Cache Busting\uff09<\/strong>\uff1a\u53d8\u66f4\u8d44\u6e90URL\uff08\u5982\u6dfb\u52a0hash\u6216\u7248\u672c\u53f7\uff09\u6765\u7ed5\u8fc7\u65e7\u7f13\u5b58\uff0c\u5e38\u7528\u5728\u9759\u6001\u8d44\u6e90\uff08JS\/CSS\/\u56fe\u7247\uff09\u53d1\u5e03\u6d41\u7a0b\u3002<\/li>\n<li><strong>\u6761\u4ef6\u8bf7\u6c42\uff08Conditional GET\uff09<\/strong>\uff1a\u8fb9\u7f18\u8282\u70b9\u4f7f\u7528If-Modified-Since\u6216If-None-Match\u5411origin\u53d1\u51fa\u6761\u4ef6\u8bf7\u6c42\uff0corigin\u8fd4\u56de304\u4ee5\u8282\u7701\u5e26\u5bbd\u3002<\/li>\n<\/ul>\n<p>\u7406\u89e3\u4e0a\u8ff0\u673a\u5236\u540e\uff0c\u8fd8\u9700\u638c\u63e1\u7f13\u5b58\u952e\uff08cache key\uff09\u7684\u6784\u6210\uff1a\u4e3b\u673a\u540d\u3001\u8def\u5f84\u3001\u67e5\u8be2\u5b57\u7b26\u4e32\u3001Cookie\u3001\u8bf7\u6c42\u5934\uff08\u5982Accept-Encoding\uff09\u90fd\u53ef\u80fd\u53c2\u4e0ecache key\u8ba1\u7b97\u3002\u9519\u8bef\u7684cache key\u914d\u7f6e\u4f1a\u5bfc\u81f4\u7f13\u5b58\u51fb\u7a7f\u6216\u7f13\u5b58\u6c61\u67d3\uff08\u4f8b\u5982\u628a\u7528\u6237\u4f1a\u8bddCookie\u4f5c\u4e3acache key\u7684\u4e00\u90e8\u5206\uff09\u3002<\/p>\n<h3>\u6280\u672f\u7ec6\u8282\uff1a\u8f6f\u6e05\u7406\u4e0e\u786c\u6e05\u7406<\/h3>\n<p>\u5f88\u591aCDN\u533a\u5206\u201c\u8f6f\u5237\u65b0\u201d\uff08soft purge\uff09\u548c\u201c\u786c\u5237\u65b0\u201d\uff08hard purge\uff09\u3002\u8f6f\u5237\u65b0\u901a\u5e38\u5c06\u7f13\u5b58\u6761\u76ee\u6807\u8bb0\u4e3a\u5931\u6548\uff0c\u4f46\u5728\u540e\u53f0\u9010\u6b65\u56de\u6e90\u5e76\u66f4\u65b0\uff1b\u786c\u5237\u65b0\u7acb\u5373\u5728\u8fb9\u7f18\u8282\u70b9\u5220\u9664\u7f13\u5b58\u5e76\u963b\u65ad\u4f9d\u8d56\u8be5\u7f13\u5b58\u7684\u8bf7\u6c42\u76f4\u5230\u65b0\u5185\u5bb9\u5c31\u7eea\u3002\u8f6f\u5237\u65b0\u4f18\u70b9\u662f\u5e73\u6ed1\u8fc7\u6e21\u3001\u964d\u4f4e\u5bf9origin\u7684\u77ac\u65f6\u538b\u529b\uff1b\u786c\u5237\u65b0\u7528\u4e8e\u5b89\u5168\u4fee\u8865\u6216\u654f\u611f\u4fe1\u606f\u6cc4\u9732\u7684\u7d27\u6025\u60c5\u5f62\u3002<\/p>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u63a8\u8350\u7b56\u7565<\/h2>\n<p>\u9488\u5bf9\u4e0d\u540c\u573a\u666f\u91c7\u7528\u4e0d\u540c\u7b56\u7565\u53ef\u4ee5\u5728\u6027\u80fd\u4e0e\u4e00\u81f4\u6027\u4e4b\u95f4\u53d6\u5f97\u5e73\u8861\uff1a<\/p>\n<ul>\n<li><strong>\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001JS\u3001CSS\uff09<\/strong>\uff1a\u63a8\u8350\u4f7f\u7528\u7248\u672c\u5316+\u957fTTL\uff08Cache-Control: max-age=31536000, immutable\uff09\uff0c\u7ed3\u5408\u6784\u5efa\u6d41\u7a0b\u81ea\u52a8\u66f4\u65b0\u6587\u4ef6\u540d\u6216hash\uff0c\u907f\u514d\u9891\u7e41purge\u3002<\/li>\n<li><strong>\u9891\u7e41\u66f4\u65b0\u4f46\u975e\u7d27\u6025\u5185\u5bb9\uff08\u65b0\u95fb\u3001\u535a\u5ba2\uff09<\/strong>\uff1a\u4f7f\u7528\u77edTTL\uff0c\u7ed3\u5408stale-while-revalidate\/stale-if-error\u7b56\u7565\uff0c\u4ee5\u964d\u4f4eorigin\u538b\u529b\u5e76\u5728\u66f4\u65b0\u65f6\u4fdd\u8bc1\u53ef\u7528\u6027\u3002<\/li>\n<li><strong>\u7d27\u6025\u4fee\u590d\u3001\u654f\u611f\u6570\u636e\u53d8\u66f4<\/strong>\uff1a\u901a\u8fc7CDN\u7684API\u6267\u884c\u786c\u6e05\u9664\u6216\u57fa\u4e8esurrogate-key\u7684\u6279\u91cf\u5931\u6548\u64cd\u4f5c\uff0c\u5fc5\u8981\u65f6\u589e\u52a0origin\u9a8c\u8bc1\u548c\u5f3a\u5236Cache-Control: no-cache\u5934\u3002<\/li>\n<li><strong>\u4e2a\u6027\u5316\/\u8ba4\u8bc1\u9875\u9762<\/strong>\uff1a\u907f\u514d\u8fb9\u7f18\u7f13\u5b58\u6216\u4f7f\u7528\u8fb9\u7f18\u4fa7\u79c1\u6709\u7f13\u5b58\u7b56\u7565\uff0c\u5229\u7528Cookie\u6216Authorization\u6392\u9664cache key\uff0c\u6216\u91c7\u7528Edge-Side Includes\uff08ESI\uff09\u5c40\u90e8\u62fc\u88c5\u3002<\/li>\n<\/ul>\n<h3>\u8de8\u533a\u57df\u7ad9\u70b9\u4e0e\u8fb9\u7f18\u914d\u7f6e\u8003\u8651<\/h3>\n<p>\u5f53\u4f60\u7684\u7f51\u7ad9\u90e8\u7f72\u5728\u9999\u6e2fVPS\u6216\u7f8e\u56fdVPS\uff0c\u6216\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u7ec4\u5408\u4ee5\u8986\u76d6\u4e9a\u592a\u4e0e\u5317\u7f8e\u7528\u6237\u65f6\uff0cCDN\u7684\u5730\u7406\u5206\u5e03\u548c\u914d\u7f6e\u5c31\u663e\u5f97\u5c24\u4e3a\u91cd\u8981\u3002\u9009\u62e9\u5408\u9002\u7684cache key\u7b56\u7565\u9700\u8981\u8003\u8651\u5730\u57df\u5dee\u5f02\uff08\u4f8b\u5982\u8bed\u8a00\u5207\u6362\u3001\u5730\u533a\u5185\u5bb9\u5dee\u5f02\uff09\uff0c\u4ee5\u53caDNS\/Anycast\u7684\u8def\u7531\u7b56\u7565\u3002\u5bf9\u4e8e\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7b49\u591a\u533a\u57df\u90e8\u7f72\uff0c\u5e94\u4fdd\u6301origin\u914d\u7f6e\u4e00\u81f4\u6027\uff0c\u5e76\u4f18\u5148\u4f7f\u7528\u5168\u7403\u4e00\u81f4\u7684\u7f13\u5b58\u7b56\u7565\uff0c\u8f85\u4ee5\u533a\u57df\u5316\u7684\u4f8b\u5916\u89c4\u5219\u3002<\/p>\n<h2>\u7f13\u5b58\u5237\u65b0\u5b9e\u6218\u6280\u5de7\u4e0e\u81ea\u52a8\u5316<\/h2>\n<p>\u4ee5\u4e0b\u4e3a\u5b9e\u6218\u4e2d\u5e38\u7528\u3001\u53ef\u7acb\u523b\u843d\u5730\u7684\u6280\u5de7\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528Surrogate Keys\/Tags<\/strong>\uff1a\u4e3a\u4e00\u7ec4\u76f8\u5173\u8d44\u6e90\u6253\u4e0a\u540c\u4e00\u6807\u7b7e\uff08\u4f8b\u5982article-123\uff09\uff0c\u53d1\u5e03\u65b0\u5185\u5bb9\u65f6\u901a\u8fc7\u6807\u7b7e\u4e00\u952e\u6279\u91cf\u5931\u6548\uff0c\u907f\u514d\u5bf9\u6bcf\u4e2aURL\u9010\u4e2apurge\u3002<\/li>\n<li><strong>\u5206\u7ea7\u5237\u65b0\u4e0e\u8282\u6d41<\/strong>\uff1a\u5bf9\u5927\u91cfURL\u5237\u65b0\u91c7\u7528\u5206\u6279\u5f02\u6b65\u7b56\u7565\uff0c\u7ed3\u5408\u961f\u5217\uff08\u5982Redis\u3001RabbitMQ\uff09\u4e0e\u91cd\u8bd5\u673a\u5236\uff0c\u9632\u6b62\u77ac\u65f6\u5237\u7f13\u5b58\u5bfc\u81f4origin\u96ea\u5d29\u3002<\/li>\n<li><strong>\u9884\u70ed\uff08Cache Warming\uff09<\/strong>\uff1a\u5728\u53d1\u5e03\u540e\u901a\u8fc7\u811a\u672c\u6216CDN\u9884\u53d6API\u89e6\u53d1\u8fb9\u7f18\u8282\u70b9\u62c9\u53d6\u65b0\u5185\u5bb9\uff0c\u51cf\u5c11\u9996\u6ce2\u7528\u6237\u7684\u7f13\u5b58\u672a\u547d\u4e2d\u5ef6\u8fdf\u3002<\/li>\n<li><strong>\u5229\u7528Conditional Requests\u4e0eETag<\/strong>\uff1a\u4e3a\u52a8\u6001\u751f\u6210\u7684\u8d44\u6e90\u8fd4\u56deETag\/Last-Modified\uff0c\u5141\u8bb8\u8fb9\u7f18\u8282\u70b9\u4f7f\u7528If-None-Match\/If-Modified-Since\u8fdb\u884c\u9ad8\u6548\u9a8c\u8bc1\uff0c\u964d\u4f4e\u5e26\u5bbd\u3002<\/li>\n<li><strong>\u6d4b\u8bd5\u4e0e\u9a8c\u8bc1<\/strong>\uff1a\u7528curl -I\u67e5\u770b\u54cd\u5e94\u5934\uff08Cache-Control\u3001Age\u3001X-Cache\uff09\uff0c\u6a21\u62df\u4e0d\u540c\u5730\u57df\u548cQuery\u5b57\u7b26\u4e32\u9a8c\u8bc1cache key\u6548\u679c\u3002<\/li>\n<\/ul>\n<p>\u793a\u4f8bcurl\u547d\u4ee4\uff08\u5feb\u901f\u68c0\u67e5\u7f13\u5b58\u547d\u4e2d\uff09\uff1a<\/p>\n<p><code>curl -I -H \"Host: example.com\" https:\/\/edge-node.example.com\/path<\/code><\/p>\n<p>\u5173\u6ce8\u54cd\u5e94\u5934\u4e2dAge\uff08\u8868\u793a\u7f13\u5b58\u5df2\u4fdd\u5b58\u591a\u4e45\uff09\u3001X-Cache\uff08CDN\u662f\u5426\u547d\u4e2d\uff09\u3001Via\/Server\u7b49\u5b57\u6bb5\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n<h3>\u76d1\u63a7\u3001\u62a5\u8b66\u4e0e\u6210\u672c\u63a7\u5236<\/h3>\n<p>\u7f13\u5b58\u5237\u65b0\u867d\u7136\u80fd\u4fdd\u8bc1\u5185\u5bb9\u4e00\u81f4\u6027\uff0c\u4f46\u9891\u7e41\u5237\u65b0\u4f1a\u5bfc\u81f4\u5e26\u5bbd\u548corigin\u8bbf\u95ee\u91cf\u6fc0\u589e\uff0c\u4ece\u800c\u5e26\u6765\u6210\u672c\u4e0a\u5347\u3002\u5e94\u5efa\u7acb\u76d1\u63a7\u6307\u6807\uff1a<\/p>\n<ul>\n<li>\u7f13\u5b58\u547d\u4e2d\u7387\uff08global &amp; per-pop\uff09<\/li>\n<li>origin\u8bf7\u6c42QPS\u4e0e\u5e26\u5bbd<\/li>\n<li>\u5355\u6b21\/\u77ed\u65f6\u95f4\u7a97\u53e3\u5185\u7684purge\u8bf7\u6c42\u91cf<\/li>\n<li>\u9519\u8bef\u7387\u4e0e\u54cd\u5e94\u65f6\u95f4\uff08\u5c24\u5176\u5728\u5237\u65b0\u7a97\u53e3\uff09<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u9608\u503c\u62a5\u8b66\uff08\u5982origin 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