{"id":209581,"date":"2025-10-23T18:00:15","date_gmt":"2025-10-23T10:00:15","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209581\/"},"modified":"2025-10-23T18:00:16","modified_gmt":"2025-10-23T10:00:16","slug":"cdn-47","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209581\/","title":{"rendered":"\u4f01\u4e1a\u7f51\u7ad9CDN\u52a0\u901f\u5b9e\u6218\uff1a\u5173\u952e\u7b56\u7565\u4e0e\u8bbf\u95ee\u6027\u80fd\u63d0\u5347\u79d8\u7c4d"},"content":{"rendered":"<p>\u5728\u4f01\u4e1a\u7ea7\u7f51\u7ad9\u67b6\u6784\u4e2d\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u6210\u4e3a\u63d0\u5347\u8bbf\u95ee\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u7684\u6838\u5fc3\u7ec4\u6210\u90e8\u5206\u3002\u65e0\u8bba\u662f\u9762\u5411\u9999\u6e2f\u5730\u533a\u7684\u95e8\u6237\uff0c\u8fd8\u662f\u8986\u76d6\u5168\u7403\u7684\u7535\u5546\u5e73\u53f0\uff0c\u5408\u7406\u8bbe\u8ba1\u4e0e\u90e8\u7f72CDN\u80fd\u591f\u663e\u8457\u964d\u4f4e\u5ef6\u8fdf\u3001\u7f13\u89e3\u6e90\u7ad9\u538b\u529b\u5e76\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u56f4\u7ed5CDN\u5de5\u4f5c\u539f\u7406\u3001\u5b9e\u6218\u914d\u7f6e\u3001\u5e38\u89c1\u95ee\u9898\u4e0e\u9009\u8d2d\u5efa\u8bae\u5c55\u5f00\uff0c\u5e26\u6765\u4e00\u5957\u53ef\u64cd\u4f5c\u7684\u6027\u80fd\u63d0\u5347\u79d8\u7c4d\u3002<\/p>\n<h2>CDN \u7684\u6838\u5fc3\u539f\u7406\u4e0e\u5173\u952e\u6280\u672f\u8981\u70b9<\/h2>\n<p>CDN \u7684\u57fa\u672c\u601d\u60f3\u662f\u5c06\u9759\u6001\u6216\u53ef\u7f13\u5b58\u7684\u8d44\u6e90\u590d\u5236\u5230\u5206\u5e03\u5728\u4e0d\u540c\u5730\u57df\u7684\u8fb9\u7f18\u8282\u70b9\uff08POP\uff09\uff0c\u5e76\u901a\u8fc7\u5c31\u8fd1\u8c03\u5ea6\u8ba9\u7528\u6237\u4ece\u6700\u8fd1\u8282\u70b9\u83b7\u53d6\u5185\u5bb9\uff0c\u51cf\u5c11\u7f51\u7edc\u8de8\u56fd\u6216\u8de8\u7f51\u7edc\u7684\u4f20\u8f93\u6b21\u6570\u4e0e\u8df3\u6570\u3002\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\u6d89\u53ca\u4ee5\u4e0b\u5173\u952e\u6280\u672f\uff1a<\/p>\n<h3>1. Anycast \u4e0e\u8fb9\u7f18\u5c31\u8fd1\u8def\u7531<\/h3>\n<ul>\n<li>\u4f7f\u7528 <strong>Anycast<\/strong> \u516c\u7f51\u5730\u5740\u5c06\u8bf7\u6c42\u8def\u7531\u5230\u6700\u8fd1\u6216\u6700\u4f18\u7684\u8fb9\u7f18\u8282\u70b9\uff0c\u4ee5\u7f29\u77ed\u5f80\u8fd4\u65f6\u5ef6\uff08RTT\uff09\u3002<\/li>\n<li>\u7ed3\u5408 DNS GeoIP \u6216 HTTP \u91cd\u5b9a\u5411\u505a\u4e8c\u6b21\u4f18\u5316\uff0c\u786e\u4fdd\u4e0d\u540c\u5730\u533a\uff08\u5982\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u7528\u6237\u547d\u4e2d\u5c31\u8fd1 POP\u3002<\/li>\n<\/ul>\n<h3>2. \u7f13\u5b58\u7b56\u7565\u4e0e HTTP \u5934\u63a7\u5236<\/h3>\n<ul>\n<li>\u5408\u7406\u8bbe\u7f6e <code>Cache-Control<\/code>\u3001<code>Expires<\/code>\u3001<code>ETag<\/code> \u7b49\u5934\uff0c\u533a\u5206\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001\u811a\u672c\u3001\u6837\u5f0f\uff09\u4e0e\u52a8\u6001\u63a5\u53e3\uff08API\uff09\u3002<\/li>\n<li>\u4f7f\u7528 <strong>stale-while-revalidate<\/strong>\u3001<strong>stale-if-error<\/strong> \u589e\u5f3a\u53ef\u7528\u6027\uff0c\u907f\u514d\u6e90\u7ad9\u77ed\u6682\u4e0d\u53ef\u7528\u5bfc\u81f4\u7528\u6237\u4f53\u9a8c\u964d\u7ea7\u3002<\/li>\n<li>\u4e3a\u767b\u5f55\u6001\u6216\u4e2a\u6027\u5316\u9875\u9762\u4f7f\u7528 <code>Set-Cookie<\/code> \u65f6\u8981\u5c0f\u5fc3\uff0c\u5c3d\u91cf\u628a\u4e0d\u542b\u654f\u611f\u4fe1\u606f\u7684\u8d44\u6e90\u5355\u72ec\u6258\u7ba1\u5230 CDN\u3002<\/li>\n<\/ul>\n<h3>3. TLS \u52a0\u901f\u4e0e HTTP\/2\u3001HTTP\/3<\/h3>\n<ul>\n<li>\u8fb9\u7f18\u8282\u70b9\u7ec8\u6b62 TLS\uff08SSL\uff09\uff0c\u51cf\u5c11\u6e90\u7ad9\u7684\u52a0\u5bc6\u89e3\u5bc6\u538b\u529b\uff0c\u540c\u65f6\u914d\u5408\u73b0\u4ee3\u534f\u8bae\uff08HTTP\/2 \u591a\u8def\u590d\u7528\u3001HTTP\/3 QUIC\uff09\u53ef\u663e\u8457\u63d0\u5347\u5e76\u53d1\u5c0f\u6587\u4ef6\u52a0\u8f7d\u6548\u7387\u3002<\/li>\n<li>\u786e\u4fdd\u8bc1\u4e66\u94fe\u6b63\u786e\u3001\u542f\u7528 OCSP stapling\uff0c\u4ee5\u514d\u589e\u52a0\u9996\u5305\u65f6\u5ef6\u3002<\/li>\n<\/ul>\n<h3>4. \u538b\u7f29\u3001\u56fe\u7247\u4f18\u5316\u4e0e\u8fb9\u7f18\u8f6c\u6362<\/h3>\n<ul>\n<li>\u542f\u7528 Gzip \u6216 Brotli \u5bf9\u6587\u672c\u7c7b\u8d44\u6e90\u538b\u7f29\uff1b\u5bf9\u56fe\u7247\u4f7f\u7528 WebP\/AVIF \u5e76\u505a\u6309\u9700\u88c1\u526a\u4e0e\u61d2\u52a0\u8f7d\uff0c\u51cf\u5c0f\u5e26\u5bbd\u3002<\/li>\n<li>\u5229\u7528\u8fb9\u7f18\u8ba1\u7b97\uff08Edge Workers\uff09\u8fdb\u884c\u56fe\u7247\u683c\u5f0f\u8f6c\u6362\u3001\u54cd\u5e94\u91cd\u5199\uff0c\u964d\u4f4e\u56de\u6e90\u6b21\u6570\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u914d\u7f6e\u5efa\u8bae<\/h2>\n<p>\u4e0d\u540c\u4e1a\u52a1\u7c7b\u578b\u5bf9 CDN \u7684\u914d\u7f6e\u4fa7\u91cd\u70b9\u4e0d\u540c\uff0c\u4ee5\u4e0b\u5217\u4e3e\u5e38\u89c1\u573a\u666f\u4e0e\u5bf9\u5e94\u5b9e\u8df5\uff1a<\/p>\n<h3>\u9759\u6001\u7f51\u7ad9 \/ \u843d\u5730\u9875<\/h3>\n<ul>\n<li>\u5c06\u6240\u6709\u9759\u6001\u8d44\u6e90\u5b8c\u6574\u7f13\u5b58\u5230\u8fb9\u7f18\uff0c\u8f83\u957f\u7684 Cache-Control\uff08\u4f8b\u5982 7 \u5929\uff09\u5373\u53ef\uff1b\u914d\u5408\u7248\u672c\u5316\uff08\u6587\u4ef6\u540d\u5e26 hash\uff09\u4fdd\u8bc1\u7f13\u5b58\u5237\u65b0\u53ef\u63a7\u3002<\/li>\n<li>\u542f\u7528 CDN \u7684 HTTP\/2\u3001Brotli\uff0c\u5f00\u542f\u667a\u80fd\u538b\u7f29\u4e0e\u8fb9\u7f18\u7f13\u5b58\u3002<\/li>\n<\/ul>\n<h3>\u7535\u5546\u5e73\u53f0 \/ \u52a8\u6001\u5185\u5bb9\u7ed3\u5408<\/h3>\n<ul>\n<li>\u91c7\u7528\u5206\u5c42\u7f13\u5b58\u7b56\u7565\uff1a\u9759\u6001\u8d44\u6e90\u5168\u7ad9\u7f13\u5b58\uff0cAPI \u63a5\u53e3\u4f7f\u7528\u77ed TTL \u5e76\u652f\u6301\u6761\u4ef6 GET\uff08If-Modified-Since \/ ETag\uff09\u3002<\/li>\n<li>\u5bf9\u5173\u952e\u4e1a\u52a1\u9875\u9762\uff08\u5982\u8d2d\u7269\u8f66\u3001\u7ed3\u7b97\uff09\u4f7f\u7528\u201cCache Tagging\u201d\u6216\u6309\u8def\u5f84\u7cbe\u786e\u6e05\u7406\uff08purge\uff09\uff0c\u907f\u514d\u5168\u7ad9\u5237\u65b0\u5e26\u6765\u7684\u6ce2\u52a8\u3002<\/li>\n<li>\u8003\u8651\u4f7f\u7528 <strong>\u4f1a\u8bdd\u9ecf\u6027<\/strong>\u6216\u8fb9\u7f18\u4f1a\u8bdd\u7f13\u5b58\u4ee5\u964d\u4f4e\u6e90\u7ad9\u538b\u529b\u3002<\/li>\n<\/ul>\n<h3>\u5168\u7403\u5206\u53d1\u4e0e\u533a\u57df\u4f18\u5316<\/h3>\n<ul>\n<li>\u82e5\u7528\u6237\u4e3b\u8981\u96c6\u4e2d\u5728\u4e9a\u6d32\uff08\u9999\u6e2f\u3001\u53f0\u6e7e\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\uff09\uff0c\u4f18\u5148\u9009\u62e9\u5728\u8be5\u533a\u57df\u62e5\u6709\u4e30\u5bcc POP \u7684 CDN \u670d\u52a1\u5546\uff1b\u540c\u65f6\u4e3a\u7f8e\u6d32\u7528\u6237\u8003\u8651\u7f8e\u56fd\u670d\u52a1\u5668 \u6216 \u7f8e\u56fd\u4ea7\u54c1\u8282\u70b9\u3002<\/li>\n<li>\u591a CDN \u7b56\u7565\uff08Multi-CDN\uff09\u53ef\u4ee5\u6839\u636e\u6545\u969c\u3001\u6027\u80fd\u4e0e\u6d41\u91cf\u6210\u672c\u505a\u533a\u57df\u8c03\u5ea6\uff0c\u907f\u514d\u5355\u70b9\u5931\u6548\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u81ea\u5efa\u8d1f\u8f7d vs \u516c\u5171 CDN<\/h2>\n<p>\u5728\u9009\u62e9\u81ea\u5efa\u52a0\u901f\u5c42\uff08\u4f8b\u5982\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u4e0a\u90e8\u7f72\u7f13\u5b58\u8282\u70b9\uff09\u8fd8\u662f\u4f7f\u7528\u7b2c\u4e09\u65b9 CDN \u65f6\uff0c\u9700\u8981\u6743\u8861\u6210\u672c\u3001\u63a7\u5236\u6743\u4e0e\u8fd0\u7ef4\u590d\u6742\u5ea6\uff1a<\/p>\n<ul>\n<li><strong>\u7b2c\u4e09\u65b9 CDN<\/strong>\uff1a\u5feb\u901f\u90e8\u7f72\u3001\u5168\u7403 POP\u3001\u5185\u7f6e\u5b89\u5168\uff08WAF\u3001DDoS \u9632\u62a4\uff09\u548c\u534f\u8bae\u4f18\u5316\u3002\u9002\u5408\u5e0c\u671b\u5feb\u901f\u63d0\u5347\u5168\u7403\u6027\u80fd\u4e14\u4e0d\u613f\u610f\u6295\u5165\u5927\u91cf\u8fd0\u7ef4\u7684\u4f01\u4e1a\u7528\u6237\u3002<\/li>\n<li><strong>\u81ea\u5efa\u8fb9\u7f18 \/ \u534a\u6258\u7ba1\u65b9\u6848<\/strong>\uff1a\u5728\u5e26\u5bbd\u6210\u672c\u3001\u6570\u636e\u5408\u89c4\u6216\u7279\u6b8a\u4e1a\u52a1\u903b\u8f91\uff08\u4f8b\u5982\u4e0e\u516c\u53f8\u540e\u7aef\u6df1\u5ea6\u96c6\u6210\uff09\u65f6\u66f4\u7075\u6d3b\u3002\u9700\u8981\u8fd0\u7ef4\u56e2\u961f\u652f\u6301\uff0c\u53ef\u914d\u5408\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS \u6216\u6d77\u5916\u670d\u52a1\u5668\u6784\u5efa\u591a\u70b9\u56de\u6e90\u3002<\/li>\n<\/ul>\n<h3>\u6027\u80fd\u4e0e\u6210\u672c\u5bf9\u6bd4\u8981\u70b9<\/h3>\n<ul>\n<li>\u5e26\u5bbd\u8d39\u7528\uff1a\u6d77\u5916\u6d41\u91cf\u8d39\u7528\u5dee\u5f02\u8f83\u5927\uff0c\u9999\u6e2f\u670d\u52a1\u5668\u5bf9\u4e9a\u6d32\u56de\u6e90\u901a\u5e38\u66f4\u53cb\u597d\uff1b\u7f8e\u533a\u6d41\u91cf\u53ef\u80fd\u5728\u7f8e\u4e1c\/\u7f8e\u897f\u8282\u70b9\u66f4\u7ecf\u6d4e\u3002<\/li>\n<li>\u8fd0\u7ef4\u6210\u672c\uff1a\u7b2c\u4e09\u65b9 CDN 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