{"id":209505,"date":"2025-10-23T16:03:14","date_gmt":"2025-10-23T08:03:14","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209505\/"},"modified":"2025-10-23T16:03:15","modified_gmt":"2025-10-23T08:03:15","slug":"cdn-13","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209505\/","title":{"rendered":"CDN\u57fa\u7840\u672f\u8bed\u5168\u89e3\u6790\uff1a\u4e00\u6587\u641e\u5b9a\u5173\u952e\u6982\u5ff5"},"content":{"rendered":"<p>\u5728\u4e92\u8054\u7f51\u6027\u80fd\u4f18\u5316\u4e0e\u5168\u7403\u5206\u53d1\u7684\u5b9e\u8df5\u4e2d\uff0c\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u5df2\u7ecf\u6210\u4e3a\u7ad9\u957f\u3001\u4f01\u4e1a\u548c\u5f00\u53d1\u8005\u7684\u5fc5\u5907\u5de5\u5177\u3002\u672c\u6587\u5c06\u4ece\u5e95\u5c42\u539f\u7406\u3001\u6838\u5fc3\u672f\u8bed\u5230\u5b9e\u9645\u9009\u578b\u5efa\u8bae\u8fdb\u884c\u5168\u9762\u89e3\u6790\uff0c\u5e2e\u52a9\u4f60\u5728\u5efa\u8bbe\u7f51\u7ad9\u6216\u5e94\u7528\u65f6\u505a\u51fa\u66f4\u5408\u7406\u7684\u67b6\u6784\u51b3\u7b56\u3002\u65e0\u8bba\u4f60\u4f7f\u7528\u7684\u662f\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\uff0c\u8fd8\u662f\u8ba1\u5212\u5728\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u4e0a\u90e8\u7f72\u670d\u52a1\uff0c\u7406\u89e3 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\u80fd\u6709\u6548\u63d0\u5347\u8bbf\u95ee\u901f\u5ea6\u3001\u51cf\u8f7b\u6e90\u7ad9\u538b\u529b\u5e76\u589e\u5f3a\u6297\u5cf0\u503c\u80fd\u529b\u3002<\/p>\n<h3>\u5e38\u89c1\u672f\u8bed\u8be6\u89e3<\/h3>\n<ul>\n<li><strong>\u8fb9\u7f18\u8282\u70b9\uff08Edge Node \/ PoP\uff09<\/strong>\uff1a\u7528\u4e8e\u7f13\u5b58\u548c\u54cd\u5e94\u7528\u6237\u8bf7\u6c42\u7684\u5730\u7406\u5206\u6563\u670d\u52a1\u5668\u3002<\/li>\n<li><strong>\u56de\u6e90\uff08Origin Pull\uff09<\/strong>\uff1a\u8fb9\u7f18\u8282\u70b9\u5728\u9996\u6b21\u8bf7\u6c42\u6216\u7f13\u5b58\u5931\u6548\u65f6\uff0c\u4ece\u6e90\u7ad9\u62c9\u53d6\u5185\u5bb9\u3002<\/li>\n<li><strong>\u56de\u6e90\uff08Origin Push\uff09<\/strong>\uff1a\u6e90\u7ad9\u4e3b\u52a8\u5c06\u5185\u5bb9\u63a8\u9001\u5230\u8fb9\u7f18\u8282\u70b9\uff0c\u5e38\u7528\u4e8e\u5927\u6587\u4ef6\u6216\u9700\u8981\u9884\u70ed\u7684\u573a\u666f\u3002<\/li>\n<li><strong>\u7f13\u5b58\u7b56\u7565<\/strong>\uff1a\u5305\u62ec HTTP Cache-Control\u3001Expires\u3001E-Tag \u7b49\u5934\u90e8\uff0c\u7528\u4e8e\u63a7\u5236\u7f13\u5b58\u65f6\u95f4\u548c\u9a8c\u8bc1\u673a\u5236\u3002<\/li>\n<li><strong>\u7f13\u5b58\u547d\u4e2d\u7387\uff08Cache Hit Ratio\uff09<\/strong>\uff1a\u8861\u91cf\u8bf7\u6c42\u88ab\u8fb9\u7f18\u8282\u70b9\u547d\u4e2d\u7f13\u5b58\u7684\u6bd4\u4f8b\uff0c\u76f4\u63a5\u5f71\u54cd\u52a0\u901f\u6548\u679c\u4e0e\u6210\u672c\u3002<\/li>\n<li><strong>\u8d1f\u8f7d\u5747\u8861\uff08Load Balancing\uff09<\/strong>\uff1a\u4e3a\u591a\u6e90\u7ad9\u6216\u591a\u8282\u70b9\u5206\u914d\u6d41\u91cf\uff0c\u5e38\u7ed3\u5408 DNS \u89e3\u6790\u6216\u4efb\u4f55cast \u6280\u672f\u5b9e\u73b0\u3002<\/li>\n<li><strong>\u52a8\u9759\u5206\u79bb<\/strong>\uff1a\u5c06\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001CSS\u3001JS\u3001\u89c6\u9891\uff09\u901a\u8fc7 CDN \u53d1\u5e03\uff0c\u52a8\u6001\u8bf7\u6c42\u4ecd\u76f4\u8fbe\u6e90\u7ad9\u6216\u8d70\u5e94\u7528\u5c42\u52a0\u901f\u3002<\/li>\n<li><strong>HTTPS \u4e0e\u8bc1\u4e66\u7ba1\u7406<\/strong>\uff1a\u73b0\u4ee3 CDN \u652f\u6301 TLS \u7ec8\u6b62\uff0c\u63d0\u4f9b\u81ea\u5e26\u8bc1\u4e66\u3001SNI \u6216\u81ea\u5b9a\u4e49\u8bc1\u4e66\u4e0a\u4f20\u529f\u80fd\u3002<\/li>\n<li><strong>\u8de8\u57df\u8d44\u6e90\u5171\u4eab\uff08CORS\uff09<\/strong>\uff1a\u5f53 CDN \u6258\u7ba1\u8d44\u6e90\u88ab\u5916\u57df\u5f15\u7528\u65f6\uff0c\u9700\u8981\u5408\u7406\u914d\u7f6e Access-Control-Allow-Origin\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u6280\u672f\u7ec6\u8282<\/h2>\n<p>CDN \u7684\u5e94\u7528\u8fdc\u8d85\u9759\u6001\u6587\u4ef6\u52a0\u901f\uff0c\u5178\u578b\u573a\u666f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u5168\u7403\u9759\u6001\u8d44\u6e90\u5206\u53d1\uff1a\u9002\u5408\u5728\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u6258\u7ba1\u6e90\u7ad9\uff0c\u5229\u7528\u8fb9\u7f18\u8282\u70b9\u8986\u76d6\u4e1c\u4e9a\u3001\u5317\u7f8e\u7b49\u533a\u57df\uff0c\u964d\u4f4e\u8de8\u5883\u4f20\u8f93\u5ef6\u8fdf\u3002<\/li>\n<li>\u9ad8\u6e05\u89c6\u9891\u4e0e\u6d41\u5a92\u4f53\u5206\u53d1\uff1a\u9700\u8981\u652f\u6301\u5206\u6bb5\u4e0b\u8f7d\uff08HLS\/DASH\uff09\u3001\u8fb9\u7f18\u8f6c\u7801\u6216\u8fb9\u7f18\u7f13\u5b58\u9884\u70ed\uff0c\u63d0\u5347\u5e26\u5bbd\u5229\u7528\u7387\u4e0e\u64ad\u653e\u7a33\u5b9a\u6027\u3002<\/li>\n<li>API \u52a0\u901f\u4e0e\u5168\u7ad9\u52a0\u901f\uff1a\u7ed3\u5408\u667a\u80fd\u8def\u7531\u3001TLS \u52a0\u901f\u4e0e HTTP\/2 \u6216 QUIC\uff08HTTP\/3\uff09\uff0c\u4f18\u5316\u52a8\u6001\u5185\u5bb9\u7684\u4f20\u8f93\u6027\u80fd\u3002<\/li>\n<li>DDoS \u9632\u62a4\u4e0e WAF\uff1aCDN \u53ef\u4ee5\u4f5c\u4e3a\u7b2c\u4e00\u9053\u9632\u7ebf\uff0c\u5438\u6536\u5927\u91cf\u6076\u610f\u6d41\u91cf\u5e76\u8fc7\u6ee4\u5e38\u89c1\u653b\u51fb\u3002<\/li>\n<\/ul>\n<p>\u6280\u672f\u914d\u7f6e\u793a\u4f8b\uff1a\u82e5\u4f60\u7684\u6e90\u7ad9\u4f4d\u4e8e\u9999\u6e2fVPS\uff0c\u9762\u5411\u4e2d\u56fd\u5927\u9646\u4e0e\u4e1c\u5357\u4e9a\u7528\u6237\uff0c\u5efa\u8bae\u5728 CDN \u7b56\u7565\u4e2d\u542f\u7528\u533a\u57df\u6027\u8282\u70b9\u4f18\u5148\u3001GZIP\/ Brotli \u538b\u7f29\u3001\u957f\u7f13\u5b58\u65f6\u95f4\u7684\u9759\u6001\u8d44\u6e90\u4e0e\u77ed\u7f13\u5b58\u6216\u4e0d\u7f13\u5b58\u7684 API \u8def\u5f84\u3002\u540c\u65f6\u542f\u7528 TLS\uff08\u8bc1\u4e66\u53ef\u4ee5\u7531 CDN \u514d\u8d39\u6258\u7ba1\uff09\u548c HTTP\/2 \u6216 QUIC \u6765\u51cf\u5c11\u63e1\u624b\u4e0e\u4f20\u8f93\u5ef6\u8fdf\u3002<\/p>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1aCDN \u4e0e\u4f20\u7edf\u52a0\u901f\u65b9\u6848<\/h2>\n<p>\u5c06 CDN \u4e0e\u4f20\u7edf\u7684\u4ec5\u4f9d\u9760\u5355\u70b9\u670d\u52a1\u5668\u3001\u6216\u8005\u4ec5\u4f5c\u8d1f\u8f7d\u5747\u8861\u7684\u65b9\u6848\u76f8\u6bd4\uff0c\u6709\u4ee5\u4e0b\u660e\u663e\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li><strong>\u5168\u7403\u5206\u5e03\uff0c\u964d\u4f4e\u5ef6\u8fdf<\/strong>\uff1aCDN \u7684\u8fb9\u7f18\u8282\u70b9\u8986\u76d6\u591a\u56fd\u591a\u5730\u533a\uff0c\u53ef\u663e\u8457\u7f29\u77ed\u7528\u6237\u5230\u670d\u52a1\u7684\u94fe\u8def\u957f\u5ea6\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7b49\u4e9a\u6d32\u8282\u70b9\u5bc6\u96c6\u7684\u7f51\u7edc\u62d3\u6251\u3002<\/li>\n<li><strong>\u5e26\u5bbd\u4e0e\u6210\u672c\u4f18\u5316<\/strong>\uff1a\u901a\u8fc7\u7f13\u5b58\u547d\u4e2d\u524a\u51cf\u56de\u6e90\u6d41\u91cf\uff0c\u964d\u4f4e\u6e90\u7ad9\u5e26\u5bbd\u5f00\u9500\uff0c\u5c24\u5176\u5728\u89c6\u9891\u3001\u56fe\u7247\u5bc6\u96c6\u578b\u5e94\u7528\u4e0a\u66f4\u660e\u663e\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\u4e0e\u6297\u538b\u80fd\u529b<\/strong>\uff1a\u8fb9\u7f18\u5206\u6563\u8bf7\u6c42\u4e0e\u591a\u8282\u70b9\u5bb9\u707e\u663e\u8457\u63d0\u5347\u6574\u4f53\u53ef\u7528\u6027\uff0c\u914d\u5408 DDoS \u7f13\u89e3\u80fd\u62b5\u6297\u77ed\u65f6\u5927\u6d41\u91cf\u7a81\u53d1\u3002<\/li>\n<li><strong>\u8fd0\u7ef4\u7b80\u5316<\/strong>\uff1a\u8bb8\u591a CDN \u63d0\u4f9b\u63a7\u5236\u53f0\u3001API \u4e0e\u65e5\u5fd7\uff0c\u4fbf\u4e8e\u76d1\u63a7\u6d41\u91cf\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u4e0e\u5b89\u5168\u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n<p>\u4f46\u4e5f\u6709\u9700\u8981\u6ce8\u610f\u7684\u9650\u5236\uff1a\u5bf9\u4e8e\u5f3a\u4e00\u81f4\u6027\u8981\u6c42\u6216\u590d\u6742\u7684\u4f1a\u8bdd\u9ecf\u6027\u573a\u666f\uff0cCDN \u5e76\u4e0d\u80fd\u66ff\u4ee3\u540e\u7aef\u5e94\u7528\u67b6\u6784\u8bbe\u8ba1\u3002\u8fd8\u6709\uff0c\u8de8\u5883 CDN \u5728\u4e2d\u56fd\u5927\u9646\u8bbf\u95ee\u65f6\u53ef\u80fd\u6d89\u53ca ICP \u5907\u6848\u4e0e\u5408\u89c4\u95ee\u9898\uff0c\u9009\u62e9\u8282\u70b9\u4e0e\u670d\u52a1\u5546\u65f6\u9700\u7559\u610f\u5f53\u5730\u6cd5\u89c4\u3002<\/p>\n<h2>\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae<\/h2>\n<p>\u9009\u62e9\u5408\u9002\u7684 CDN \u65f6\uff0c\u5e94\u4ece\u4ee5\u4e0b\u7ef4\u5ea6\u8bc4\u4f30\uff1a<\/p>\n<ul>\n<li><strong>\u8282\u70b9\u8986\u76d6\u4e0e\u7f51\u7edc\u8d28\u91cf<\/strong>\uff1a\u67e5\u770b CDN \u5728\u76ee\u6807\u5e02\u573a\uff08\u5982\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u3001\u7f8e\u56fd\uff09\u662f\u5426\u6709\u8db3\u591f PoP\uff0c\u53ca\u4e0e\u8fd0\u8425\u5546\u7684\u4e92\u8054\u5173\u7cfb\u3002<\/li>\n<li><strong>\u7f13\u5b58\u7b56\u7565\u652f\u6301<\/strong>\uff1a\u662f\u5426\u652f\u6301\u81ea\u5b9a\u4e49\u8def\u5f84\u89c4\u5219\u3001Query String \u7f13\u5b58\u7b56\u7565\u3001\u7f13\u5b58\u9884\u70ed\uff08prefetch\uff09\u4e0e\u5e26\u5bbd\u5305\u8ba1\u8d39\u6a21\u5f0f\u3002<\/li>\n<li><strong>\u534f\u8bae\u4e0e\u6027\u80fd\u4f18\u5316<\/strong>\uff1a\u652f\u6301 HTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u3001TLS 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