{"id":209639,"date":"2025-10-23T19:42:42","date_gmt":"2025-10-23T11:42:42","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209639\/"},"modified":"2025-10-23T19:42:43","modified_gmt":"2025-10-23T11:42:43","slug":"cdn-72","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209639\/","title":{"rendered":"CDN\u52a0\u901f\u5927\u6570\u636e\u5e73\u53f0\u8bbf\u95ee\uff1a\u67b6\u6784\u5b9e\u6218\u4e0e\u4f18\u5316\u7b56\u7565"},"content":{"rendered":"<p>\u5728\u5927\u6570\u636e\u5e73\u53f0\u7684\u5feb\u901f\u53d1\u5c55\u80cc\u666f\u4e0b\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u4ece\u4f20\u7edf\u7684\u9759\u6001\u8d44\u6e90\u52a0\u901f\uff0c\u9010\u6b65\u6269\u5c55\u5230\u5bf9\u5927\u6570\u636e\u8bbf\u95ee\u3001\u5206\u6790\u7ed3\u679c\u5206\u53d1\u3001\u6d41\u5f0f\u5904\u7406\u4ee5\u53ca API 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\u7684\u4e3b\u52a8\u5931\u6548\uff08Purge\/Invalidate\uff09\u4e0e\u57fa\u4e8e\u7248\u672c\u7684\u547d\u540d\uff08cache-busting\uff09\u6765\u4fdd\u8bc1\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u667a\u80fd\u8def\u7531\u4e0e\u8d1f\u8f7d\u5747\u8861<\/strong>\uff1a\u4f7f\u7528 Anycast\u3001GSLB\uff08\u5168\u5c40\u8d1f\u8f7d\u5747\u8861\uff09\u548c\u5065\u5eb7\u68c0\u67e5\uff0c\u628a\u7528\u6237\u8bf7\u6c42\u5206\u914d\u5230\u6700\u4f18\u7684\u8fb9\u7f18\u6216\u6700\u8fd1\u7684\u6570\u636e\u4e2d\u5fc3\uff0c\u652f\u6301\u8de8\u5730\u57df\uff08\u5982\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u52a0\u901f\u3002<\/li>\n<li><strong>\u4f20\u8f93\u5c42\u4f18\u5316<\/strong>\uff1a\u652f\u6301 HTTP\/2\u3001\u591a\u8def\u590d\u7528\u3001TLS \u4f1a\u8bdd\u91cd\u7528\u3001QUIC\/HTTP\/3 \u6765\u964d\u4f4e\u63e1\u624b\u5f00\u9500\u548c\u63d0\u9ad8\u5e76\u53d1\u4f20\u8f93\u6548\u7387\uff0c\u5c24\u5176\u9002\u5408\u5927\u91cf\u5c0f\u6587\u4ef6\u6216\u9ad8\u5e76\u53d1 API \u573a\u666f\u3002<\/li>\n<\/ul>\n<h3>\u4e0e\u5927\u6570\u636e\u5b58\u50a8\u7684\u7ed3\u5408\u70b9<\/h3>\n<p>\u5927\u6570\u636e\u5e73\u53f0\u5e38\u89c1\u5b58\u50a8\u5305\u62ec\u5bf9\u8c61\u5b58\u50a8\uff08S3\/\u517c\u5bb9 API\uff09\u3001HDFS\u3001\u6570\u636e\u5e93\u5bfc\u51fa\u7684\u9759\u6001\u6587\u4ef6\u4ee5\u53ca\u6d41\u5f0f\u4e2d\u95f4\u4ef6\u3002CDN \u4e0e\u8fd9\u4e9b\u5b58\u50a8\u7ed3\u5408\u7684\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li>\u5bf9\u8c61\u5b58\u50a8\u4f5c\u4e3a\u6e90\u7ad9\uff1a\u5bf9\u9759\u6001\u5206\u6790\u7ed3\u679c\u3001\u6a21\u578b\u6743\u91cd\u3001\u6570\u636e\u5feb\u7167\u7b49\u4f7f\u7528 CDN \u7f13\u5b58\uff0c\u51cf\u5c11\u9891\u7e41\u8bfb\u53d6 S3 \u7684\u6210\u672c\u3002<\/li>\n<li>\u52a0\u901f API \u4e0e\u52a8\u6001\u67e5\u8be2\uff1a\u901a\u8fc7\u7f13\u5b58\u534a\u9759\u6001 API\uff08\u5982\u5e26\u6709\u7248\u672c\u53f7\u6216\u65f6\u95f4\u7a97\u53e3\u7684\u5206\u6790\u7ed3\u679c\uff09\u53ca\u4f7f\u7528 Edge Compute\/Workers \u5728\u8fb9\u7f18\u8fdb\u884c\u8f7b\u91cf\u805a\u5408\u4e0e\u9884\u8ba1\u7b97\u3002<\/li>\n<li>\u5927\u6587\u4ef6\u5206\u5757\u4e0e\u65ad\u70b9\u7eed\u4f20\uff1a\u5229\u7528 Range \u8bf7\u6c42\u914d\u5408\u8fb9\u7f18\u7f13\u5b58\u4e0e\u56de\u6e90\u591a\u7ebf\u7a0b\u4e0b\u8f7d\u6765\u52a0\u901f\u5927\u6587\u4ef6\u5206\u53d1\uff08\u4f8b\u5982\u673a\u5668\u5b66\u4e60\u6570\u636e\u96c6\u3001\u65e5\u5fd7\u5f52\u6863\uff09\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u8df5\u8981\u70b9<\/h2>\n<p>\u5728\u5b9e\u9645\u90e8\u7f72\u4e2d\uff0c\u4e0d\u540c\u573a\u666f\u9700\u8981\u4e0d\u540c\u7684 CDN \u7b56\u7565\u3002<\/p>\n<h3>\u573a\u666f\u4e00\uff1a\u79bb\u7ebf\u5206\u6790\u7ed3\u679c\u4e0e\u6a21\u578b\u5206\u53d1<\/h3>\n<ul>\n<li>\u5c06\u6a21\u578b\u6587\u4ef6\u4e0e\u79bb\u7ebf\u5206\u6790\u62a5\u544a\u653e\u5728\u5bf9\u8c61\u5b58\u50a8\uff0c\u901a\u8fc7 CDN \u7f13\u5b58\u5e38\u7528\u7248\u672c\u3002\u4f7f\u7528\u7248\u672c\u5316\u6587\u4ef6\u540d\u907f\u514d\u9891\u7e41\u5931\u6548\u8bf7\u6c42\u3002<\/li>\n<li>\u5229\u7528\u538b\u7f29\u4e0e\u5206\u5757\uff08\u4f8b\u5982 gzip + range\uff09\u964d\u4f4e\u4f20\u8f93\u6210\u672c\uff0c\u5e76\u5728\u8fb9\u7f18\u8282\u70b9\u63d0\u4f9b\u52a0\u901f\u4e0b\u8f7d\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e8c\uff1a\u6570\u636e API \u4e0e\u4eea\u8868\u76d8\u52a0\u901f<\/h3>\n<ul>\n<li>\u5bf9\u54cd\u5e94\u53ef\u7f13\u5b58\u7684\u63a5\u53e3\u8bbe\u7f6e\u5408\u7406\u7684 Cache-Control\uff08\u5982 max-age, s-maxage\uff09\uff0c\u5e76\u914d\u5408 stale-while-revalidate \u6216 stale-if-error \u63d0\u5347\u53ef\u7528\u6027\u3002<\/li>\n<li>\u5bf9\u52a8\u6001\u6570\u636e\u4f7f\u7528 Edge \u6e32\u67d3\u6216 WebAssembly\/Workers \u505a\u90e8\u5206\u805a\u5408\uff0c\u51cf\u5c11\u56de\u6e90\u538b\u529b\u4e0e\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e09\uff1a\u6d41\u5f0f\u65e5\u5fd7\u3001\u6307\u6807\u548c\u5b9e\u65f6\u5c55\u793a<\/h3>\n<ul>\n<li>\u5b9e\u65f6\u6d41\u6570\u636e\u901a\u5e38\u4e0d\u53ef\u7f13\u5b58\uff0c\u5efa\u8bae\u628a CDN \u7528\u4e8e\u5206\u53d1\u9759\u6001\u524d\u7aef\u3001\u5207\u7247\u5316\u5386\u53f2\u6570\u636e\u4e0e\u5b58\u6863\uff0c\u5b9e\u65f6\u4f20\u8f93\u5219\u8d70 WebSocket\u3001gRPC \u6216\u4e13\u7528\u6d41\u901a\u9053\u3002<\/li>\n<li>\u7ed3\u5408\u8fb9\u7f18\u8ba1\u7b97\u505a\u91c7\u6837\u6216\u538b\u7f29\uff0c\u964d\u4f4e\u4e2d\u5fc3\u5e73\u53f0\u7684\u5904\u7406\u91cf\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u5316\u7b56\u7565\uff1a\u4ece\u7f13\u5b58\u7b56\u7565\u5230\u8fd0\u7ef4\u7ec6\u8282<\/h2>\n<p>CDN \u5728\u5927\u6570\u636e\u573a\u666f\u4e0b\u7684\u4f18\u5316\u4e0d\u4ec5\u662f\u914d\u7f6e\u7f13\u5b58\u90a3\u4e48\u7b80\u5355\uff0c\u8fd8\u9700\u8981\u4ece\u534f\u8bae\u3001\u7f51\u7edc\u4e0e\u8fd0\u7ef4\u591a\u65b9\u9762\u5165\u624b\u3002<\/p>\n<h3>\u7f13\u5b58\u7b56\u7565\u4e0e\u952e\u8bbe\u8ba1<\/h3>\n<ul>\n<li>\u5408\u7406\u8bbe\u8ba1 Cache Key\uff1a\u53bb\u6389\u4e0d\u5f71\u54cd\u5185\u5bb9\u7684\u67e5\u8be2\u53c2\u6570\uff0c\u4fdd\u7559\u7528\u4e8e\u533a\u5206\u7248\u672c\u7684\u53c2\u6570\uff08\u5982 ?v=202510\uff09\u3002<\/li>\n<li>\u5dee\u5f02\u5316\u7f13\u5b58\u7b56\u7565\uff1a\u9759\u6001\u5927\u5bf9\u8c61\u957f\u7f13\u5b58\uff08\u51e0\u5c0f\u65f6\u5230\u51e0\u5929\uff09\uff0c\u534a\u9759\u6001 API \u4f7f\u7528\u77ed\u7f13\u5b58\uff08\u51e0\u5341\u79d2\u5230\u51e0\u5206\u949f\uff09\uff0c\u5b9e\u65f6 API \u7981\u7528\u7f13\u5b58\u6216\u4f7f\u7528 Edge \u8ba1\u7b97\u3002<\/li>\n<li>\u4f7f\u7528\u5206\u5c42\u7f13\u5b58\uff08Regional\/Tiered\uff09\u548c Origin Shield \u51cf\u5c11 origin \u538b\u529b\u3002<\/li>\n<\/ul>\n<h3>\u4f20\u8f93\u4e0e\u534f\u8bae\u4f18\u5316<\/h3>\n<ul>\n<li>\u542f\u7528 HTTP\/2 \u548c QUIC\uff08HTTP\/3\uff09\u4ee5\u63d0\u9ad8\u5e76\u53d1\u8fde\u63a5\u6027\u80fd\u4e0e\u4e22\u5305\u6062\u590d\u901f\u5ea6\u3002<\/li>\n<li>\u5229\u7528 TLS \u4f1a\u8bdd\u590d\u7528\u4e0e OCSP stapling \u51cf\u5c11\u63e1\u624b\u5ef6\u8fdf\uff0c\u5c24\u5176\u5bf9\u8de8\u56fd\u8bbf\u95ee\uff08\u5982\u4ece\u9999\u6e2f\u5230\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u5f88\u91cd\u8981\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u586b\u5145\u4e0e\u9884\u70ed<\/h3>\n<ul>\n<li>\u5bf9\u5173\u952e\u6570\u636e\u505a\u9884\u70ed\uff08cache warming\uff09\uff0c\u901a\u8fc7\u811a\u672c\u5728\u6d41\u91cf\u4f4e\u5cf0\u65f6\u6279\u91cf\u8bbf\u95ee\u8fb9\u7f18 URL\uff0c\u63d0\u524d\u6784\u5efa\u7f13\u5b58\u3002<\/li>\n<li>\u57fa\u4e8e\u8bbf\u95ee\u9891\u7387\u8c03\u6574\u7f13\u5b58\u7b56\u7565\uff0c\u4f7f\u7528 CDN \u63d0\u4f9b\u7684\u76d1\u63a7\u6570\u636e\uff08Cache Hit Ratio\u3001Byte Hit Ratio\uff09\u4f5c\u4e3a\u4f18\u5316\u4f9d\u636e\u3002<\/li>\n<\/ul>\n<h3>\u4e00\u81f4\u6027\u3001\u5931\u6548\u4e0e\u56de\u6e90\u63a7\u5236<\/h3>\n<ul>\n<li>\u5bf9\u9700\u8981\u5f3a\u4e00\u81f4\u6027\u7684\u573a\u666f\u4f7f\u7528\u77ed TTL \u6216\u76f4\u63a5\u56de\u6e90\uff0c\u5e76\u7ed3\u5408 ETag\/If-Modified-Since \u5b9e\u73b0\u6761\u4ef6\u56de\u6e90\u3002<\/li>\n<li>\u5236\u5b9a\u5408\u7406\u7684\u5931\u6548\u7b56\u7565\uff1a\u9891\u7e41\u66f4\u65b0\u7684\u6570\u636e\u91c7\u7528\u5c40\u90e8\u5931\u6548\u6216\u7248\u672c\u5316\uff0c\u907f\u514d\u5168\u91cf purge \u5bfc\u81f4\u77ac\u95f4\u9ad8\u5e76\u53d1\u56de\u6e90\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u4e0e\u53ef\u9760\u6027<\/h3>\n<ul>\n<li>\u7ed3\u5408 WAF\u3001\u9632\u706b\u5899\u4e0e\u901f\u7387\u9650\u5236\u673a\u5236\u9632\u62a4 DDoS\u3001\u66b4\u529b\u8bbf\u95ee\uff0c\u786e\u4fdd\u5e73\u53f0\u5728\u906d\u53d7\u653b\u51fb\u65f6\u4ecd\u80fd\u5229\u7528\u8fb9\u7f18\u7f13\u5b58\u4fdd\u6301\u53ef\u7528\u6027\u3002<\/li>\n<li>\u4f7f\u7528\u7b7e\u540d URL\uff08Signed URL\uff09\u6216 Token \u673a\u5236\u4fdd\u62a4\u79c1\u6709\u6570\u636e\u5206\u53d1\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1aCDN vs \u4f20\u7edf\u76f4\u8fde\u4e0e\u4e13\u7ebf<\/h2>\n<p>\u9009\u62e9 CDN \u8fd8\u662f\u4f9d\u8d56\u4e13\u7ebf\/\u76f4\u8fde\uff0c\u9700\u8981\u6839\u636e\u6210\u672c\u3001\u5ef6\u8fdf\u4e0e\u63a7\u5236\u7a0b\u5ea6\u5e73\u8861\uff1a<\/p>\n<ul>\n<li><strong>\u5ef6\u8fdf\u4e0e\u7528\u6237\u4f53\u9a8c<\/strong>\uff1aCDN \u5728\u5168\u7403\u8fb9\u7f18\u8282\u70b9\u53ef\u663e\u8457\u964d\u4f4e\u9996\u6b21\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\uff0c\u5bf9\u7f51\u7ad9\u3001\u4eea\u8868\u76d8\u53ca\u6570\u636e\u4e0b\u8f7d\u6709\u76f4\u63a5\u63d0\u5347\uff0c\u5c24\u5176\u662f\u9762\u5411\u9999\u6e2f\u3001\u4e1c\u4e9a\uff08\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\uff09\u3001\u6216\u4e1c\u5357\u4e9a\uff08\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u7684\u7528\u6237\u3002<\/li>\n<li><strong>\u6210\u672c<\/strong>\uff1aCDN 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