{"id":209519,"date":"2025-10-23T16:16:22","date_gmt":"2025-10-23T08:16:22","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209519\/"},"modified":"2025-10-23T16:16:23","modified_gmt":"2025-10-23T08:16:23","slug":"cdn-20","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209519\/","title":{"rendered":"CDN \u52a8\u6001\u8bf7\u6c42\u52a0\u901f\uff1a\u6253\u9020\u6beb\u79d2\u7ea7\u54cd\u5e94\u7684\u5b9e\u6218\u65b9\u6848"},"content":{"rendered":"<p>\u5728\u4e92\u8054\u7f51\u5e94\u7528\u5bf9\u5ef6\u8fdf\u548c\u7a33\u5b9a\u6027\u8981\u6c42\u8d8a\u6765\u8d8a\u9ad8\u7684\u4eca\u5929\uff0c\u4f20\u7edf\u7684\u9759\u6001\u8d44\u6e90 CDN 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\u7b49\u534f\u8bae\u7279\u6027\u5bf9\u4e2d\u95f4\u4ee3\u7406\u548c\u52a0\u901f\u670d\u52a1\u63d0\u51fa\u66f4\u9ad8\u8981\u6c42\u3002<\/li>\n<\/ul>\n<h2>\u52a8\u6001\u8bf7\u6c42\u52a0\u901f\u7684\u6838\u5fc3\u539f\u7406<\/h2>\n<p>\u8981\u5b9e\u73b0\u52a8\u6001\u8bf7\u6c42\u7684\u6beb\u79d2\u7ea7\u54cd\u5e94\uff0c\u9700\u8981\u4ece\u7f51\u7edc\u4f20\u8f93\u3001\u534f\u8bae\u4f18\u5316\u3001\u8fb9\u7f18\u5904\u7406\u3001\u56de\u6e90\u4f18\u5316\u53ca\u667a\u80fd\u8def\u7531\u7b49\u591a\u4e2a\u5c42\u9762\u534f\u540c\u53d1\u529b\uff1a<\/p>\n<h3>1. \u7f51\u7edc\u5c42\uff1a\u51cf\u5c11 RTT \u4e0e\u4e22\u5305<\/h3>\n<p>\u52a8\u6001\u8bf7\u6c42\u7684\u5ef6\u8fdf\u4e2d\u5f88\u5927\u4e00\u90e8\u5206\u6765\u81ea TCP\/QUIC \u63e1\u624b\u548c\u5305\u5f80\u8fd4\u3002\u5e38\u89c1\u4f18\u5316\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 Anycast + \u8fb9\u7f18\u8282\u70b9\u90e8\u7f72\uff0c\u7f29\u77ed\u7528\u6237\u5230\u8fb9\u7f18\u7684\u7269\u7406\u8ddd\u79bb\uff1b<\/li>\n<li>\u91c7\u7528 TCP Fast Open\u3001Keep-Alive\u3001TLS 0-RTT\uff08\u6216\u4f7f\u7528 QUIC\/HTTP\/3\uff09\u51cf\u5c11\u63e1\u624b\u5f00\u9500\uff1b<\/li>\n<li>\u542f\u7528\u8fde\u63a5\u590d\u7528\u4e0e\u957f\u8fde\u63a5\u6280\u672f\uff0c\u907f\u514d\u6bcf\u6b21\u8bf7\u6c42\u90fd\u91cd\u65b0\u5efa\u7acb\u8fde\u63a5\uff1b<\/li>\n<li>\u5728\u63a5\u5165\u5c42\u4f7f\u7528\u524d\u5411\u7ea0\u9519\uff08FEC\uff09\u4e0e\u4e22\u5305\u91cd\u4f20\u7b56\u7565\uff0c\u51cf\u8f7b\u4e22\u5305\u9020\u6210\u7684\u5c3e\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>2. \u534f\u8bae\u5c42\uff1a\u9009\u62e9\u66f4\u9ad8\u6548\u7684\u4f20\u8f93\u534f\u8bae<\/h3>\n<p>HTTP\/2 \u7684\u591a\u8def\u590d\u7528\u548c\u5934\u90e8\u538b\u7f29\u5728\u63d0\u9ad8\u5e76\u53d1\u5c0f\u8bf7\u6c42\u6548\u7387\u4e0a\u6709\u660e\u663e\u4f18\u52bf\uff1b\u800c HTTP\/3\uff08\u57fa\u4e8e QUIC\uff09\u901a\u8fc7\u7528\u6237\u6001\u62e5\u585e\u63a7\u5236\u548c 0-RTT 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Edge Worker\uff09\u505a API \u805a\u5408\u3001\u964d\u9891\u6216\u9884\u8ba1\u7b97\uff1b<\/li>\n<li>\u5bf9\u6388\u6743\u4fe1\u606f\u8fdb\u884c\u53ef\u77ed\u671f\u7f13\u5b58\uff08\u4f8b\u5982 JWT\u3001session \u6458\u8981\uff09\uff0c\u5728\u4fdd\u8bc1\u5b89\u5168\u6027\u7684\u524d\u63d0\u4e0b\u51cf\u5c11\u9891\u7e41\u56de\u6e90\u9274\u6743\u3002<\/li>\n<\/ul>\n<h3>4. \u667a\u80fd\u8def\u7531\u4e0e\u5c31\u8fd1\u56de\u6e90<\/h3>\n<p>\u901a\u8fc7\u667a\u80fd DNS\u3001Anycast 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Side Includes\uff08ESI\uff09\u6216\u8fb9\u7f18\u6e32\u67d3\uff0c\u628a\u9875\u9762\u4e2d\u53ef\u7f13\u5b58\u548c\u4e0d\u53ef\u7f13\u5b58\u90e8\u5206\u5206\u79bb\uff1b<\/li>\n<li>\u4f7f\u7528\u77ed\u671f\u7f13\u5b58\u4e0e\u7f13\u5b58\u7a7f\u900f\u9632\u62a4\uff08\u5982\u9488\u5bf9\u767b\u5f55\u6001\u7684\u7279\u6b8a\u5904\u7406\uff09\uff1b<\/li>\n<li>\u5728\u8de8\u5883\u573a\u666f\u4e0b\uff0c\u5229\u7528\u9999\u6e2fVPS \u6216 \u65b0\u52a0\u5761\u670d\u52a1\u5668 \u4f5c\u4e3a\u4e2d\u8f6c\u8282\u70b9\uff0c\u964d\u4f4e\u533a\u57df\u5185\u7528\u6237\u7684\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u79fb\u52a8\u5e94\u7528\u4e0e\u5168\u7403 API \u670d\u52a1<\/h3>\n<ul>\n<li>\u90e8\u7f72\u5168\u7403\u8fb9\u7f18\u8282\u70b9\u5e76\u7ed3\u5408\u667a\u80fd DNS\uff0c\u4f7f\u79fb\u52a8\u5ba2\u6237\u7aef\u8bf7\u6c42\u8def\u7531\u5230\u6700\u4f18\u8282\u70b9\uff1b<\/li>\n<li>\u4f7f\u7528 HTTP\/3 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