{"id":209621,"date":"2025-10-23T19:15:17","date_gmt":"2025-10-23T11:15:17","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209621\/"},"modified":"2025-10-23T19:15:18","modified_gmt":"2025-10-23T11:15:18","slug":"cdn-66","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209621\/","title":{"rendered":"CDN\u62a4\u822a\u7535\u5546\u79d2\u6740\uff1a\u79d2\u7ea7\u54cd\u5e94\uff0c\u7a33\u63a7\u9ad8\u5e76\u53d1"},"content":{"rendered":"<p>\u5728\u7535\u5546\u5e73\u53f0\u5f00\u5c55\u9650\u65f6\u79d2\u6740\u6d3b\u52a8\u65f6\uff0c\u77ed\u65f6\u95f4\u5185\u7684\u6d41\u91cf\u66b4\u589e\u3001\u5e76\u53d1\u8bf7\u6c42\u6fc0\u589e\u4ee5\u53ca\u652f\u4ed8\u94fe\u8def\u7684\u9ad8\u53ef\u9760\u6027\u9700\u6c42\uff0c\u90fd\u4f1a\u7ed9\u670d\u52a1\u5668\u548c\u7f51\u7edc\u5e26\u6765\u5de8\u5927\u6311\u6218\u3002\u501f\u52a9\u5408\u7406\u8bbe\u8ba1\u7684\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\uff0c\u53ef\u4ee5\u5728\u79d2\u7ea7\u54cd\u5e94\u80fd\u529b\u3001\u5e76\u53d1\u63a7\u5236\u4e0e\u6545\u969c\u9694\u79bb\u65b9\u9762\u5927\u5e45\u63d0\u5347\u7cfb\u7edf\u7a33\u5b9a\u6027\u4e0e\u7528\u6237\u4f53\u9a8c\u3002\u672c\u6587\u4ece\u6280\u672f\u539f\u7406\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u3001\u4e0e\u4f20\u7edf\u67b6\u6784\u7684\u4f18\u52bf\u5bf9\u6bd4\u4ee5\u53ca\u5b9e\u6218\u7ea7\u9009\u8d2d\u5efa\u8bae\u56db\u4e2a\u65b9\u9762\uff0c\u8be6\u5c3d\u5256\u6790\u5982\u4f55\u7528 CDN \u4e3a\u7535\u5546\u79d2\u6740\u62a4\u822a\uff0c\u540c\u65f6\u517c\u987e\u591a\u5730\u57df\u90e8\u7f72\uff08\u4f8b\u5982\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u7b49\uff09\u7684\u73b0\u72b6\u4e0e\u8003\u8651\u3002<\/p>\n<h2>CDN \u652f\u6491\u79d2\u6740\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>CDN \u7684\u6838\u5fc3\u662f\u5c06\u9759\u6001\u4e0e\u90e8\u5206\u52a8\u6001\u5185\u5bb9\u5206\u53d1\u5230\u79bb\u7528\u6237\u66f4\u8fd1\u7684\u8fb9\u7f18\u8282\u70b9\uff08PoP\uff09\uff0c\u901a\u8fc7\u5730\u7406\u5c31\u8fd1\u3001\u7f51\u7edc\u4f18\u5316\u4e0e\u534f\u8bae\u52a0\u901f\u6765\u964d\u4f4e\u54cd\u5e94\u65f6\u95f4\u3002\u5bf9\u79d2\u6740\u573a\u666f\u6765\u8bf4\uff0c\u5173\u952e\u6280\u672f\u70b9\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7f13\u5b58\u7b56\u7565\u4e0e\u7f13\u5b58\u5c42\u7ea7<\/strong>\uff1a\u5728\u8fb9\u7f18\u8282\u70b9\u7f13\u5b58\u5546\u54c1\u9875\u9759\u6001\u8d44\u6e90\uff08\u56fe\u7247\u3001\u811a\u672c\u3001\u6837\u5f0f\u8868\uff09\uff0c\u51cf\u5c11\u5bf9\u6e90\u7ad9\uff08origin\uff09\u8bf7\u6c42\u9891\u7387\u3002\u4f7f\u7528\u591a\u7ea7\u7f13\u5b58\uff08edge \u2192 mid-tier \u2192 origin\uff09\u53ef\u4ee5\u5728\u6e90\u7ad9\u538b\u529b\u7a81\u589e\u65f6\u63d0\u4f9b\u7f13\u51b2\u3002<\/li>\n<li><strong>\u7f13\u5b58\u952e\u4e0e\u53d8\u4f53\u5904\u7406<\/strong>\uff1a\u5b9a\u4e49\u5408\u7406\u7684 cache-key\uff08\u662f\u5426\u5305\u542b Host\u3001Query String\u3001Cookie\u3001Header\uff09\uff0c\u5bf9\u9632\u6b62\u7f13\u5b58\u7a7f\u900f\u548c\u7f13\u5b58\u6c61\u67d3\u81f3\u5173\u91cd\u8981\u3002\u63a8\u8350\u5bf9\u9759\u6001\u8d44\u6e90\u4f7f\u7528\u5ffd\u7565 Query String \u7684\u7b56\u7565\uff0c\u5bf9\u5e26\u7528\u6237\u6807\u8bc6\u6216\u4e2a\u6027\u5316\u7684\u8bf7\u6c42\u8d70\u52a8\u6001\u56de\u6e90\u3002<\/li>\n<li><strong>\u534f\u8bae\u4e0e\u4f20\u8f93\u4f18\u5316<\/strong>\uff1a\u652f\u6301 HTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u53ef\u5b9e\u73b0\u591a\u8def\u590d\u7528\u3001\u5934\u90e8\u538b\u7f29\u4e0e\u66f4\u5feb\u7684\u8fde\u63a5\u5efa\u7acb\uff0c\u51cf\u5c11 RTT\uff1bTLS \u5378\u8f7d\u4e0e\u7f13\u5b58\u4f1a\u51cf\u8f7b\u540e\u7aef\u8ba1\u7b97\u8d1f\u62c5\u3002<\/li>\n<li><strong>\u8fde\u63a5\u590d\u7528\u4e0e\u957f\u8fde\u63a5<\/strong>\uff1a\u8fb9\u7f18\u8282\u70b9\u4e0e\u6e90\u7ad9\u4e4b\u95f4\u4f7f\u7528\u6301\u4e45\u8fde\u63a5\u3001\u8fde\u63a5\u6c60\u590d\u7528\u548c keep-alive\uff0c\u53ef\u663e\u8457\u964d\u4f4e TCP\/TLS \u63e1\u624b\u5f00\u9500\uff0c\u63d0\u5347\u77ed\u65f6\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002<\/li>\n<li><strong>\u52a8\u6001\u5185\u5bb9\u52a0\u901f\u4e0e\u8fb9\u7f18\u8ba1\u7b97<\/strong>\uff1a\u901a\u8fc7\u8fb9\u7f18\u811a\u672c\u6216\u51fd\u6570\uff08Edge Functions\uff09\u5728 CDN \u8282\u70b9\u5c31\u8fd1\u6267\u884c\u8ba4\u8bc1\u3001\u9650\u6d41\u6216\u9875\u9762\u7ec4\u88c5\uff0c\u51cf\u5c11\u56de\u6e90\u9891\u6b21\u5e76\u964d\u4f4e\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u5931\u6548\u4e0e\u5237\u65b0\u7b56\u7565<\/h3>\n<p>\u79d2\u6740\u6d3b\u52a8\u5e38\u4f1a\u6d89\u53ca\u4ef7\u683c\u3001\u5e93\u5b58\u7b49\u5b9e\u65f6\u66f4\u65b0\u3002\u5408\u7406\u63a7\u5236\u7f13\u5b58 TTL \u4e0e\u63d0\u4f9b\u9ad8\u6548\u7684\u7f13\u5b58\u5237\u65b0\uff08Purge\uff09\/\u9884\u70ed\uff08Warm-up\uff09\u673a\u5236\u975e\u5e38\u5173\u952e\u3002\u4e00\u822c\u5b9e\u8df5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8bbe\u7f6e\u77ed TTL \u6216\u4f7f\u7528 stale-while-revalidate \u6765\u5728\u56de\u6e90\u540c\u65f6\u7ee7\u7eed\u4e3a\u7528\u6237\u63d0\u4f9b\u65e7\u7248\u672c\u3002<\/li>\n<li>\u5728\u5f00\u552e\u524d\u8fdb\u884c\u7f13\u5b58\u9884\u70ed\uff0c\u5c06\u5173\u952e\u9875\u9762\u4e0e\u8d44\u6e90\u4e3b\u52a8\u63a8\u9001\u5230\u8fb9\u7f18\u8282\u70b9\uff0c\u907f\u514d\u9996\u6b21\u8bf7\u6c42\u7684\u51b7\u542f\u52a8\u5ef6\u8fdf\u3002<\/li>\n<li>\u5bf9\u5e93\u5b58\u53d8\u52a8\u654f\u611f\u7684 API \u8d70\u52a8\u6001\u56de\u6e90\u5e76\u914d\u5408\u5206\u5e03\u5f0f\u5185\u5b58\u7f13\u5b58\uff08\u5982 Redis\uff09\u5b9e\u73b0\u9ad8\u5e76\u53d1\u8bfb\u5199\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u8981\u70b9<\/h2>\n<p>\u79d2\u6740\u6d3b\u52a8\u53ef\u5206\u4e3a\u5927\u91cf\u9759\u6001\u8d44\u6e90\u4ea4\u4ed8\u3001\u9875\u9762\u6e32\u67d3\u4e0e\u652f\u4ed8\u94fe\u8def\u4e09\u7c7b\u5173\u952e\u73af\u8282\u3002CDN \u5728\u5404\u6761\u94fe\u8def\u7684\u4f5c\u7528\u4e0e\u914d\u5408\u7b56\u7565\u5982\u4e0b\uff1a<\/p>\n<h3>\u9759\u6001\u8d44\u6e90\u52a0\u901f\uff1a\u56fe\u7247\u3001JS\u3001CSS<\/h3>\n<ul>\n<li>\u9759\u6001\u8d44\u6e90\u5927\u91cf\u7f13\u5b58\u4e8e\u8fb9\u7f18\u8282\u70b9\uff0c\u8282\u7701\u5e26\u5bbd\u5e76\u63d0\u9ad8\u9996\u5c4f\u52a0\u8f7d\u901f\u5ea6\u3002<\/li>\n<li>\u5f00\u542f Brotli\/Gzip \u538b\u7f29\u4e0e\u5408\u7406\u7684\u7f13\u5b58\u7b56\u7565\uff0c\u914d\u5408 CDN \u7684\u667a\u80fd\u538b\u7f29\u53ef\u4ee5\u51cf\u5c0f\u4f20\u8f93\u4f53\u79ef\u3002<\/li>\n<li>\u5229\u7528\u8d44\u6e90\u7248\u672c\u5316\uff08\u6587\u4ef6\u540d\u5e26 Hash\uff09\u907f\u514d\u624b\u52a8\u6e05\u7406\u9891\u7e41 Purge\u3002<\/li>\n<\/ul>\n<h3>\u52a8\u6001\u9875\u9762\u4e0e API\uff1a\u7f13\u5b58\u5206\u5c42\u4e0e\u56de\u6e90\u63a7\u5236<\/h3>\n<ul>\n<li>\u5bf9\u5546\u54c1\u8be6\u60c5\u9875\u91c7\u53d6\u201c\u534a\u9759\u6001\u5316\u201d\uff1a\u7f13\u5b58\u4e0d\u9891\u7e41\u53d8\u5316\u90e8\u5206\uff08\u63cf\u8ff0\u3001\u56fe\u7247\uff09\uff0c\u800c\u5c06\u5e93\u5b58\u4e0e\u4ef7\u683c\u901a\u8fc7\u5f02\u6b65\u63a5\u53e3\u52a0\u8f7d\u6216\u8fb9\u7f18\u6e32\u67d3\u3002<\/li>\n<li>\u4e3a\u9ad8\u5e76\u53d1 API \u5f15\u5165\u901f\u7387\u9650\u5236\u3001\u4ee4\u724c\u6876\uff08Token Bucket\uff09\u6216\u6f0f\u6876\uff08Leaky Bucket\uff09\u7b97\u6cd5\uff0c\u5e76\u5728\u8fb9\u7f18\u8282\u70b9\u5b9e\u73b0\u521d\u7ea7\u9650\u6d41\uff0c\u4fdd\u62a4\u6e90\u7ad9\u3002<\/li>\n<li>\u90e8\u7f72 Origin Shield\uff08\u4e2d\u95f4\u56de\u6e90\u5c42\uff09\u4ee5\u51cf\u5c11\u6765\u81ea\u591a\u4e2a\u8fb9\u7f18\u8282\u70b9\u7684\u56de\u6e90\u538b\u529b\u3002<\/li>\n<\/ul>\n<h3>\u652f\u4ed8\u4e0e\u4e0b\u5355\u94fe\u8def\uff1a\u4e00\u81f4\u6027\u4e0e\u53ef\u9760\u6027<\/h3>\n<ul>\n<li>\u652f\u4ed8\u4e0e\u4e0b\u5355\u5fc5\u987b\u7ecf\u8fc7\u53ef\u4fe1\u7684\u6e90\u7ad9\u6216\u4e13\u95e8\u7684\u652f\u4ed8\u7f51\u5173\uff0c\u907f\u514d\u901a\u8fc7 CDN \u7f13\u5b58\u654f\u611f\u4e8b\u52a1\u6570\u636e\u3002<\/li>\n<li>\u4f7f\u7528\u5e42\u7b49\u8bbe\u8ba1\uff08Idempotency Key\uff09\u548c\u5206\u5e03\u5f0f\u4e8b\u52a1\u8865\u507f\u7b56\u7565\uff0c\u9632\u6b62\u91cd\u590d\u4e0b\u5355\u6216\u8d85\u5356\u3002<\/li>\n<li>\u9488\u5bf9\u9ad8\u5e76\u53d1\u5199\u5165\u573a\u666f\u91c7\u7528\u961f\u5217\u5316\uff08\u6d88\u606f\u961f\u5217\uff09\u4e0e\u4e50\u89c2\/\u60b2\u89c2\u9501\u7684\u6df7\u5408\u65b9\u6848\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1aCDN + \u8fb9\u7f18 vs \u4f20\u7edf\u5355\u70b9\u6269\u5bb9<\/h2>\n<p>\u5728\u5bf9\u6bd4\u4f20\u7edf\u901a\u8fc7\u6a2a\u5411\u6269\u5bb9\u6e90\u7ad9\uff08\u589e\u52a0\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\u5b9e\u4f8b\uff09\u4e0e\u5f15\u5165 CDN \u7684\u65b9\u6848\u65f6\uff0c\u53ef\u4ee5\u4ece\u51e0\u4e2a\u7ef4\u5ea6\u8003\u91cf\uff1a<\/p>\n<ul>\n<li><strong>\u5ef6\u8fdf\u4e0e\u7528\u6237\u4f53\u9a8c<\/strong>\uff1aCDN \u80fd\u663e\u8457\u964d\u4f4e\u5168\u7403\u7528\u6237\u7684\u7f51\u7edc\u5f80\u8fd4\u65f6\u95f4\uff0c\u5c24\u5176\u5bf9\u4e8e\u8de8\u5883\u8bbf\u95ee\uff08\u4f8b\u5982\u9999\u6e2fVPS \u670d\u52a1\u8bbf\u95ee\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u7528\u6237\u8bbf\u95ee\u7f8e\u56fdVPS\uff09\uff0c\u8fb9\u7f18\u8282\u70b9\u80fd\u63d0\u4f9b\u66f4\u7a33\u5b9a\u7684\u54cd\u5e94\u3002<\/li>\n<li><strong>\u5e76\u53d1\u627f\u8f7d\u80fd\u529b<\/strong>\uff1aCDN 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origin\u3002<\/li>\n<li><strong>\u6210\u672c\u4e0e\u53ef\u63a7\u6027<\/strong>\uff1a\u957f\u671f\u6765\u770b\uff0c\u901a\u8fc7\u8fb9\u7f18\u7f13\u5b58\u548c\u51cf\u5c11\u56de\u6e90\u6d41\u91cf\u80fd\u8282\u7701\u5e26\u5bbd\u6210\u672c\uff0c\u4f46\u9700\u8981\u5728\u7f13\u5b58\u547d\u4e2d\u7387\u548c\u5b9e\u65f6\u6027\u4e4b\u95f4\u6743\u8861\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u4e0e\u67b6\u6784\u5efa\u8bae\uff08\u9762\u5411\u7ad9\u957f\u4e0e\u4f01\u4e1a\uff09<\/h2>\n<p>\u5728\u9009\u62e9 CDN \u4e0e\u670d\u52a1\u5668\u90e8\u7f72\u7ec4\u5408\u65f6\uff0c\u5efa\u8bae\u6309\u4ee5\u4e0b\u6b65\u9aa4\u89c4\u5212\uff1a<\/p>\n<ul>\n<li><strong>\u786e\u5b9a\u8986\u76d6\u5730\u57df<\/strong>\uff1a\u6839\u636e\u7528\u6237\u5206\u5e03\u9009\u62e9 PoP 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