{"id":209649,"date":"2025-10-23T19:52:17","date_gmt":"2025-10-23T11:52:17","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209649\/"},"modified":"2025-10-23T19:52:18","modified_gmt":"2025-10-23T11:52:18","slug":"cdn-76","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209649\/","title":{"rendered":"\u535a\u5ba2\u4e0e\u81ea\u5a92\u4f53\u52a0\u901f\u79d8\u7b08\uff1aCDN\u90e8\u7f72\u4e0e\u4f18\u5316"},"content":{"rendered":"<p>\u5728\u5168\u7403\u8bbf\u95ee\u5206\u5e03\u65e5\u76ca\u5206\u6563\u7684\u4eca\u5929\uff0c\u535a\u5ba2\u4e0e\u81ea\u5a92\u4f53\u7ad9\u70b9\u8981\u5b9e\u73b0\u5feb\u901f\u3001\u7a33\u5b9a\u7684\u5185\u5bb9\u5206\u53d1\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u7ecf\u6210\u4e3a\u5fc5\u5907\u5de5\u5177\u3002\u65e0\u8bba\u662f\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u6258\u7ba1\u7684\u7ad9\u70b9\uff0c\u8fd8\u662f\u90e8\u7f72\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u7b49\u73af\u5883\u4e0b\uff0c\u5408\u7406\u7684CDN\u90e8\u7f72\u4e0e\u4f18\u5316\u7b56\u7565\u90fd\u80fd\u663e\u8457\u63d0\u5347\u9875\u9762\u52a0\u8f7d\u901f\u5ea6\u3001\u964d\u4f4e\u5e26\u5bbd\u6210\u672c\u5e76\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u5230\u5b9e\u64cd\u3001\u4ece\u4f18\u52bf\u5bf9\u6bd4\u5230\u9009\u8d2d\u5efa\u8bae\uff0c\u8be6\u5c3d\u8bb2\u89e3\u5982\u4f55\u4e3a\u535a\u5ba2\u4e0e\u81ea\u5a92\u4f53\u52a0\u901f\u5e76\u5b9e\u73b0\u7a33\u5b9a\u8fd0\u8425\u3002<\/p>\n<h2>CDN 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\u5728\u4e0d\u540c\u5730\u7406\u4f4d\u7f6e\u90e8\u7f72\u7684\u7f13\u5b58\u670d\u52a1\u5668\uff0c\u79bb\u7ec8\u7aef\u7528\u6237\u8d8a\u8fd1\uff0c\u5ef6\u8fdf\u8d8a\u4f4e\u3002<\/li>\n<li><strong>\u56de\u6e90\uff08Origin\uff09<\/strong>\uff1a\u5f53\u8fb9\u7f18\u8282\u70b9\u6ca1\u6709\u7f13\u5b58\u547d\u4e2d\u65f6\uff0c\u4f1a\u5411\u6e90\u7ad9\uff08\u4f8b\u5982\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u8bf7\u6c42\u5185\u5bb9\u3002<\/li>\n<li><strong>\u7f13\u5b58\u7b56\u7565\uff08Cache-Control \/ Expires\uff09<\/strong>\uff1a\u901a\u8fc7 HTTP \u5934\u63a7\u5236\u8d44\u6e90\u5728\u8fb9\u7f18\u8282\u70b9\u7684\u7f13\u5b58\u65f6\u957f\u4e0e\u53ef\u53d8\u6027\u3002<\/li>\n<li><strong>Anycast \u8def\u7531<\/strong>\uff1a\u7528\u4e8e\u5c06\u7528\u6237\u8bf7\u6c42\u81ea\u52a8\u8def\u7531\u5230\u6700\u8fd1\u6216\u6700\u4f18\u7684\u8fb9\u7f18\u8282\u70b9\uff0c\u63d0\u5347\u7a33\u5b9a\u6027\u548c\u5197\u4f59\u3002<\/li>\n<li><strong>HTTP\/2 \u548c HTTP\/3\uff08QUIC\uff09<\/strong>\uff1a\u73b0\u4ee3\u4f20\u8f93\u534f\u8bae\u80fd\u51cf\u5c11\u8fde\u63a5\u5ef6\u8fdf\u3001\u591a\u8def\u590d\u7528\u548c\u5934\u90e8\u538b\u7f29\uff0c\u9002\u7528\u4e8e TLS \u52a0\u5bc6\u540e\u7684\u52a0\u901f\u3002<\/li>\n<\/ul>\n<h2>\u535a\u5ba2\u4e0e\u81ea\u5a92\u4f53\u7684\u5178\u578b\u5e94\u7528\u573a\u666f<\/h2>\n<p>\u4e0d\u540c\u7ad9\u70b9\u7c7b\u578b\u548c\u6d41\u91cf\u6a21\u5f0f\u4f1a\u5f71\u54cd CDN \u7684\u90e8\u7f72\u7b56\u7565\u3002\u5e38\u89c1\u573a\u666f\u5305\u62ec\uff1a<\/p>\n<h3>\u9759\u6001\u8d44\u6e90\u5bc6\u96c6\u578b\u535a\u5ba2<\/h3>\n<ul>\n<li>\u5927\u91cf\u56fe\u7247\u3001\u89c6\u9891\u7f29\u7565\u56fe\u4e0e\u9759\u6001\u6587\u4ef6\uff08CSS\/JS\uff09\u3002\u5efa\u8bae\u5f00\u542f\u56fe\u7247\u4f18\u5316\uff08WebP\/AVIF \u8f6c\u7801\uff09\u3001\u81ea\u52a8\u538b\u7f29\u4e0e\u5ef6\u8fdf\u52a0\u8f7d\uff08lazy-loading\uff09\u3002<\/li>\n<li>\u5c06\u8fd9\u4e9b\u8d44\u6e90\u653e\u5230 CDN \u7684\u8fb9\u7f18\u8282\u70b9\u7f13\u5b58\uff0c\u8bbe\u7f6e\u8f83\u957f\u7684 Cache-Control\uff08\u4f8b\u5982 30 \u5929\u6216 365 \u5929\uff09\uff0c\u5e76\u901a\u8fc7\u6587\u4ef6\u540d\u54c8\u5e0c\uff08fingerprint\uff09\u5b9e\u73b0\u7248\u672c\u63a7\u5236\u3002<\/li>\n<\/ul>\n<h3>\u9ad8\u5e76\u53d1\u6d3b\u52a8\u6216\u63a8\u6587\u578b\u81ea\u5a92\u4f53<\/h3>\n<ul>\n<li>\u77ed\u65f6\u95f4\u5185\u7a81\u53d1\u6d41\u91cf\uff08\u4f8b\u5982\u70ed\u5e16\u3001\u4e13\u9898\u53d1\u5e03\uff09\u9700\u8981\u9632\u6b62\u6e90\u7ad9\u88ab\u51fb\u7a7f\u3002\u5efa\u8bae\u542f\u7528 CDN \u7684\u7f13\u5b58\u5c42\u3001\u9650\u6d41\u4e0e\u901f\u7387\u9650\u5236\u529f\u80fd\uff0c\u5e76\u4f7f\u7528 Origin Shield\uff08\u6216\u4e2d\u95f4\u7f13\u5b58\u5c42\uff09\u51cf\u5c11\u56de\u6e90\u538b\u529b\u3002<\/li>\n<li>\u7ed3\u5408 WAF\uff08Web Application Firewall\uff09\u963b\u6321\u6076\u610f\u6293\u53d6\u4e0e\u653b\u51fb\uff0c\u4fdd\u969c\u9999\u6e2fVPS \u6216 \u7f8e\u56fdVPS \u4e0a\u7684\u6e90\u7ad9\u7a33\u5b9a\u3002<\/li>\n<\/ul>\n<h3>\u56fd\u9645\u5316\u8bbf\u95ee\u7684\u591a\u533a\u57df\u90e8\u7f72<\/h3>\n<ul>\n<li>\u82e5\u53d7\u4f17\u5206\u5e03\u5728\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u3001\u7f8e\u56fd\u7b49\u5730\uff0c\u53ef\u7ed3\u5408\u5730\u57df\u8def\u7531\u4e0e\u591a\u6e90\u7ad9\u7b56\u7565\uff1a\u4f8b\u5982\u4e9a\u6d32\u7528\u6237\u4f18\u5148\u8c03\u5ea6\u81f3\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65e5\u672c\u670d\u52a1\u5668\uff0c\u65b0\u7f8e\u6d32\u7528\u6237\u8d70\u7f8e\u56fd\u670d\u52a1\u5668\u3002<\/li>\n<li>\u914d\u5408\u5168\u7403 DNS\uff08\u652f\u6301 GeoDNS \u6216 Anycast DNS\uff09\u51cf\u5c0f\u89e3\u6790\u5ef6\u8fdf\uff0c\u8c03\u6574 DNS TTL \u4ee5\u4fbf\u5feb\u901f\u5207\u6362\u3002<\/li>\n<\/ul>\n<h2>CDN \u90e8\u7f72\u7684\u5173\u952e\u6280\u672f\u7ec6\u8282<\/h2>\n<p>\u4e0b\u9762\u5217\u51fa\u4e00\u4e9b\u5b9e\u6218\u4e2d\u5e38\u7528\u4e14\u6709\u6548\u7684\u6280\u672f\u70b9\uff0c\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff1a<\/p>\n<h3>\u7f13\u5b58\u63a7\u5236\u4e0e\u7f13\u5b58\u5c42\u7ea7\u8bbe\u8ba1<\/h3>\n<ul>\n<li>\u4f7f\u7528 Cache-Control\uff1a\u5bf9\u9759\u6001\u8d44\u6e90\u8bbe\u7f6e <code>Cache-Control: public, max-age=31536000, immutable<\/code>\uff0c\u5bf9\u52a8\u6001\u9875\u9762\u8bbe\u7f6e\u8f83\u77ed\u7f13\u5b58\uff08\u6216\u4f7f\u7528 Edge Side Includes\/Surrogate Keys \u8fdb\u884c\u7247\u6bb5\u7f13\u5b58\uff09\u3002<\/li>\n<li>\u5229\u7528 ETag \u4e0e Last-Modified \u505a\u6761\u4ef6\u8bf7\u6c42\uff0c\u51cf\u5c11\u56de\u6e90\u6d41\u91cf\u3002<\/li>\n<li>\u914d\u7f6e\u5206\u5c42\u7f13\u5b58\uff08Edge Cache + Origin Cache-Control\uff09\u5e76\u542f\u7528 Origin Shield\uff0c\u51cf\u5c11\u591a\u4e2a\u8fb9\u7f18\u8282\u70b9\u540c\u65f6\u56de\u6e90\u7684\u6982\u7387\u3002<\/li>\n<\/ul>\n<h3>\u4f20\u8f93\u534f\u8bae\u4e0e\u52a0\u5bc6\u4f18\u5316<\/h3>\n<ul>\n<li>\u5f3a\u5236\u5f00\u542f TLS \u5e76\u4f7f\u7528\u73b0\u4ee3\u5957\u4ef6\uff1a\u4f18\u5148\u542f\u7528 TLS 1.3\uff0c\u7ed3\u5408 HTTP\/2 \u6216 HTTP\/3\uff08QUIC\uff09\u4ee5\u51cf\u5c11\u63e1\u624b\u5ef6\u8fdf\u548c\u63d0\u5347\u5e76\u53d1\u4f20\u8f93\u6548\u7387\u3002<\/li>\n<li>TLS \u8bc1\u4e66\u7ba1\u7406\uff1a\u4f7f\u7528 CDN \u63d0\u4f9b\u7684\u6258\u7ba1\u8bc1\u4e66\u6216\u81ea\u52a8\u5316\u5de5\u5177\uff08\u4f8b\u5982 ACME\uff09\u4e3a\u591a\u4e2a\u57df\u540d\u4e0e\u5b50\u57df\u540d\uff08\u5305\u62ec\u56fe\u7247\u57df\u540d\u3001\u9759\u6001\u57df\u540d\uff09\u5feb\u901f\u4e0b\u53d1\u8bc1\u4e66\u3002<\/li>\n<\/ul>\n<h3>\u538b\u7f29\u4e0e\u56fe\u7247\u4f18\u5316<\/h3>\n<ul>\n<li>\u542f\u7528 Brotli \u6216 Gzip \u538b\u7f29\u6587\u672c\u8d44\u6e90\uff08HTML\/CSS\/JS\uff09\uff0cBrotli \u5728\u8f83\u9ad8\u538b\u7f29\u6bd4\u4e0b\u66f4\u4f18\u3002<\/li>\n<li>\u56fe\u7247\u81ea\u52a8\u683c\u5f0f\u8f6c\u6362\u4e0e\u6309\u9700\u88c1\u526a\uff1aCDN \u5728\u8fb9\u7f18\u8282\u70b9\u6839\u636e User-Agent \u6216 Accept \u8bf7\u6c42\u81ea\u52a8\u4e0b\u53d1 WebP\/AVIF\uff0c\u6216\u6309\u5c4f\u5e55\u5206\u8fa8\u7387\u63d0\u4f9b\u5408\u9002\u5c3a\u5bf8\uff0c\u914d\u5408 responsive images\uff08srcset\uff09\u663e\u8457\u964d\u4f4e\u5e26\u5bbd\u3002<\/li>\n<\/ul>\n<h3>\u52a8\u6001\u5185\u5bb9\u4e0e API \u52a0\u901f<\/h3>\n<ul>\n<li>\u5bf9 API \u6216\u52a8\u6001\u9875\u9762\u4f7f\u7528\u667a\u80fd\u7f13\u5b58\u7b56\u7565\uff1a\u77ed\u65f6\u95f4\u7f13\u5b58\uff08\u4f8b\u5982\u51e0\u79d2\u5230\u51e0\u5206\u949f\uff09\uff0c\u5e76\u5728\u56de\u6e90\u65f6\u4f7f\u7528 Cache-Control: stale-while-revalidate \/ stale-if-error \u7b49\u673a\u5236\u63d0\u5347\u53ef\u7528\u6027\u3002<\/li>\n<li>\u4e3a\u52a8\u6001\u8bf7\u6c42\u542f\u7528 TCP\/QUIC \u4f18\u5316\u4e0e\u8fde\u63a5\u6c60\u590d\u7528\uff0c\u51cf\u5c11\u8de8\u533a\u57df\u957f\u8fde\u63a5\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u66f4\u65b0\u4e0e\u5931\u6548\u7b56\u7565<\/h3>\n<ul>\n<li>\u5b9e\u73b0\u6309\u9700\u6e05\u7406\uff08Purge\uff09\u4e0e\u57fa\u4e8e\u6807\u7b7e\u7684\u5931\u6548\uff08Surrogate Keys\uff09\uff0c\u907f\u514d\u9010\u6761\u6e05\u7406\u5e26\u6765\u7684\u590d\u6742\u6027\u3002<\/li>\n<li>\u53d1\u5e03\u6d41\u7a0b\u4e2d\u5c06\u9759\u6001\u8d44\u6e90\u7248\u672c\u53f7\u5316\uff0c\u4ece\u800c\u901a\u8fc7\u53d8\u66f4 URL \u8fbe\u5230\u5f3a\u5236\u5237\u65b0\u6548\u679c\uff0c\u964d\u4f4e\u5bf9 Purge \u7684\u4f9d\u8d56\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u81ea\u5efa\u7f13\u5b58 vs \u7b2c\u4e09\u65b9 CDN<\/h2>\n<p>\u9009\u62e9\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u81ea\u5df1\u7684\u9999\u6e2fVPS \u4e0a\u81ea\u5efa\u7f13\u5b58\u5c42\uff0c\u8fd8\u662f\u4f7f\u7528\u7b2c\u4e09\u65b9 CDN\uff0c\u5404\u6709\u4f18\u52a3\uff1a<\/p>\n<ul>\n<li><strong>\u81ea\u5efa\u7f13\u5b58\uff08\u4f8b\u5982 Squid\u3001Varnish\uff09<\/strong>\uff1a\u63a7\u5236\u529b\u5f3a\u3001\u6210\u672c\u53ef\u63a7\uff0c\u9002\u5408\u9700\u8981\u6781\u7aef\u5b9a\u5236\u7684\u4f01\u4e1a\u3002\u4f46\u90e8\u7f72\u4e0e\u7ef4\u62a4\u590d\u6742\uff0c\u9700\u8981\u5168\u7403 PoP \u6765\u8986\u76d6\u6d77\u5916\u8bbf\u95ee\uff08\u6bd4\u5982\u7f8e\u56fd\u3001\u97e9\u56fd\u3001\u65e5\u672c\u3001\u65b0\u52a0\u5761\uff09\u65f6\u4ee3\u4ef7\u9ad8\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u65b9 CDN\uff08\u4f8b\u5982\u5168\u7403 CDN \u63d0\u4f9b\u5546\uff09<\/strong>\uff1a\u90e8\u7f72\u5feb\u901f\u3001\u8986\u76d6\u5e7f\u6cdb\u3001\u5e26\u6709\u81ea\u52a8\u4f18\u5316\u529f\u80fd\uff08\u56fe\u50cf\u538b\u7f29\u3001\u534f\u8bae\u5347\u7ea7\u3001WAF 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