{"id":210345,"date":"2025-10-24T11:33:50","date_gmt":"2025-10-24T03:33:50","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210345\/"},"modified":"2025-10-24T11:33:52","modified_gmt":"2025-10-24T03:33:52","slug":"cdn-369","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210345\/","title":{"rendered":"CDN+\u667a\u80fd\u7f13\u5b58\uff1a\u89c6\u9891\u52a0\u901f\u7684\u5b9e\u6218\u4f18\u5316\u6307\u5357"},"content":{"rendered":"<p>\u5728\u5728\u7ebf\u89c6\u9891\u6210\u4e3a\u4e3b\u6d41\u7684\u4eca\u5929\uff0c\u5982\u4f55\u4e3a\u5168\u7403\u6216\u533a\u57df\u7528\u6237\u63d0\u4f9b<strong>\u4f4e\u5ef6\u8fdf\u3001\u9ad8\u53ef\u7528\u3001\u53ef\u6269\u5c55<\/strong>\u7684\u89c6\u9891\u5206\u53d1\u4f53\u9a8c\uff0c\u662f\u7ad9\u957f\u3001\u4f01\u4e1a\u4e0e\u5f00\u53d1\u8005\u5fc5\u987b\u9762\u5bf9\u7684\u8bfe\u9898\u3002\u901a\u8fc7\u5c06\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u4e0e\u667a\u80fd\u7f13\u5b58\u7b56\u7565\u7ed3\u5408\uff0c\u53ef\u4ee5\u5728\u4e0d\u76f2\u76ee\u6269\u5145\u6e90\u7ad9\u5e26\u5bbd\u4e0e\u8ba1\u7b97\u8d44\u6e90\u7684\u524d\u63d0\u4e0b\uff0c\u663e\u8457\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u5e76\u964d\u4f4e\u6210\u672c\u3002\u672c\u6587\u4ece\u539f\u7406\u5230\u5b9e\u6218\u3001\u4ece\u573a\u666f\u5230\u9009\u8d2d\u5efa\u8bae\uff0c\u6df1\u5165\u8bb2\u89e3\u53ef\u64cd\u4f5c\u7684\u4f18\u5316\u65b9\u6cd5\u3002<\/p>\n<h2>\u57fa\u7840\u539f\u7406\uff1aCDN 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Shield\uff09<\/strong>\uff1a\u5728\u591a\u4e2a\u8fb9\u7f18\u8282\u70b9\u548c\u6e90\u7ad9\u4e4b\u95f4\u52a0\u4e00\u5c42\u4e2d\u95f4\u7f13\u5b58\uff0c\u51cf\u5c11\u5bf9\u6e90\u7ad9\u7684\u5e76\u53d1\u538b\u529b\u3002<\/li>\n<li><strong>Stale-While-Revalidate\u3001Stale-If-Error<\/strong>\uff1a\u5f53\u540e\u7aef\u4e0d\u53ef\u7528\u6216\u6b63\u5728\u5237\u65b0\u7f13\u5b58\u65f6\u8fd4\u56de\u5df2\u8fc7\u671f\u7684\u5185\u5bb9\uff0c\u4fdd\u8bc1\u53ef\u7528\u6027\u5e76\u540e\u53f0\u5237\u65b0\u3002<\/li>\n<li><strong>\u9884\u70ed\uff08Cache Warming \/ Prefetch\uff09<\/strong>\uff1a\u5bf9\u5373\u5c06\u4e0a\u7ebf\u6216\u9884\u671f\u6d41\u884c\u7684\u89c6\u9891\uff0c\u4e3b\u52a8\u63a8\u9001\u5230\u8fb9\u7f18\u8282\u70b9\u4ee5\u907f\u514d\u9996\u8bf7\u6c42\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u6848\u4f8b<\/h2>\n<p>\u4e0d\u540c\u7684\u4e1a\u52a1\u573a\u666f\u51b3\u5b9a\u4e86\u5177\u4f53\u5b9e\u73b0\u7684\u6743\u8861\u3002<\/p>\n<h3>\u89c6\u9891\u70b9\u64ad\uff08VOD\uff09<\/h3>\n<p>\u70b9\u64ad\u901a\u5e38\u53ef\u4ee5\u5bb9\u5fcd\u8f83\u9ad8\u7684\u521d\u59cb\u62c9\u53d6\u65f6\u95f4\uff0c\u4f46\u8ffd\u6c42\u64ad\u653e\u8fc7\u7a0b\u4e2d\u7684\u7a33\u5b9a\u6027\u3002\u4f18\u5316\u70b9\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 HLS\/DASH \u5206\u7247\u5e76\u642d\u914d ABR\uff08\u81ea\u9002\u5e94\u7801\u7387\uff09\u7b56\u7565\uff0c\u914d\u5408\u8fb9\u7f18\u7f13\u5b58\u51cf\u5c11\u4e2d\u9014\u7f13\u51b2\u3002<\/li>\n<li>\u4e3a\u70ed\u95e8\u5185\u5bb9\u8bbe\u7f6e\u8f83\u957f\u7684 TTL\uff0c\u540c\u65f6\u901a\u8fc7 Cache Key \u53bb\u9664\u65e0\u5173\u53c2\u6570\uff0c\u4ece\u800c\u63d0\u5347\u547d\u4e2d\u7387\u3002<\/li>\n<li>\u7ed3\u5408\u9884\u70ed\u811a\u672c\uff0c\u5c06\u70ed\u95e8\u7247\u6bb5\u63d0\u524d\u63a8\u9001\u5230\u4e3b\u8981\u533a\u57df\uff08\u4f8b\u5982\u9999\u6e2f\/\u65e5\u672c\/\u97e9\u56fd\/\u65b0\u52a0\u5761\uff09\u8fb9\u7f18\u8282\u70b9\uff0c\u5c24\u5176\u5728\u8425\u9500\u6d3b\u52a8\u524d\u3002<\/li>\n<\/ul>\n<h3>\u76f4\u64ad\u4e0e\u4f4e\u5ef6\u8fdf\u6d41<\/h3>\n<p>\u76f4\u64ad\u8981\u6c42\u4f4e\u5ef6\u8fdf\u548c\u9ad8\u5e76\u53d1\uff0c\u7f13\u5b58\u7b56\u7565\u66f4\u4e3a\u8c28\u614e\uff1a<\/p>\n<ul>\n<li>\u91c7\u7528\u4f4e\u5ef6\u8fdf HLS\uff08LL-HLS\uff09\u3001DASH with CMAF \u6216 WebRTC \u7b49\u6280\u672f\uff0c\u5206\u7247\u66f4\u77ed\uff0c\u51cf\u5c11\u64ad\u653e\u5ef6\u8fdf\u3002<\/li>\n<li>\u5bf9\u76f4\u64ad\u6d41\u901a\u5e38\u4e0d\u505a\u957f\u65f6\u95f4\u7f13\u5b58\uff0c\u800c\u662f\u5229\u7528\u8fb9\u7f18\u8f6c\u53d1\u548c\u534f\u8bae\u4f18\u5316\uff08HTTP\/2\u3001QUIC\/HTTP3\uff09\u964d\u4f4e\u65f6\u5ef6\u3002<\/li>\n<li>\u5728\u89c2\u4f17\u5730\u57df\u5206\u5e03\u5e7f\u7684\u573a\u666f\u4e0b\uff0c\u9009\u62e9\u8986\u76d6\u8be5\u5730\u533a\u7684\u8fb9\u7f18\u8282\u70b9\uff08\u5982\u7f8e\u56fd\u670d\u52a1\u5668\u4e0e\u9999\u6e2f\u670d\u52a1\u5668\u8282\u70b9\u914d\u5408\uff09\u5f88\u5173\u952e\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1aCDN+\u667a\u80fd\u7f13\u5b58 \u4e0e \u4f20\u7edf\u76f4\u8fde\u7684\u533a\u522b<\/h2>\n<p>\u5c06 CDN \u4e0e\u667a\u80fd\u7f13\u5b58\u878d\u5408\u540e\uff0c\u4e3b\u8981\u4f18\u52bf\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u5ef6\u8fdf\u663e\u8457\u4e0b\u964d<\/strong>\uff1a\u7528\u6237\u8bf7\u6c42\u88ab\u8def\u7531\u5230\u6700\u8fd1\u8fb9\u7f18\uff0c\u8de8\u5883\u8bbf\u95ee\u4f53\u9a8c\u6539\u5584\uff0c\u5c24\u5176\u5bf9\u4e9a\u6d32\u7528\u6237\u91c7\u7528\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65e5\u672c\/\u97e9\u56fd\/\u65b0\u52a0\u5761\u8fb9\u7f18\u6548\u679c\u660e\u663e\u3002<\/li>\n<li><strong>\u5e26\u5bbd\u6210\u672c\u964d\u4f4e<\/strong>\uff1a\u8fb9\u7f18\u547d\u4e2d\u7387\u9ad8\u65f6\u6e90\u7ad9\u51fa\u6d41\u91cf\u51cf\u5c11\uff0c\u9002\u5408\u5927\u89c4\u6a21\u70b9\u64ad\u573a\u666f\u3002<\/li>\n<li><strong>\u6297\u7a81\u53d1\u6d41\u91cf\u80fd\u529b\u5f3a<\/strong>\uff1a\u70ed\u70b9\u89c6\u9891\u80fd\u5728\u8fb9\u7f18\u8fdb\u884c\u5206\u53d1\uff0c\u51cf\u8f7b\u6e90\u7ad9\u538b\u529b\u3002<\/li>\n<li><strong>\u8fd0\u7ef4\u4e0e\u53ef\u9760\u6027\u63d0\u5347<\/strong>\uff1a\u901a\u8fc7\u591a\u533a\u57df\u90e8\u7f72\uff08\u4f8b\u5982\u7f8e\u56fdVPS \u4e0e\u9999\u6e2fVPS \u7ec4\u5408\uff09\u548c Origin Shield\uff0c\u964d\u4f4e\u5355\u70b9\u6545\u969c\u98ce\u9669\u3002<\/li>\n<\/ul>\n<h2>\u5b9e\u65bd\u7ec6\u8282\uff1a\u7f13\u5b58\u914d\u7f6e\u4e0e\u4f18\u5316\u6280\u5de7<\/h2>\n<p>\u4e0b\u9762\u5217\u51fa\u53ef\u76f4\u63a5\u5b9e\u65bd\u7684\u6280\u672f\u7ec6\u8282\u4e0e\u5efa\u8bae\uff1a<\/p>\n<h3>\u5408\u7406\u8bbe\u7f6e Cache-Control \u4e0e\u5206\u6bb5\u7b56\u7565<\/h3>\n<ul>\n<li>\u5bf9\u9759\u6001\u5207\u7247\u8bbe\u7f6e Cache-Control: public, max-age=86400\uff08\u6839\u636e\u70ed\u5ea6\u8c03\u6574\uff09\u3002<\/li>\n<li>\u5bf9 manifest\uff08m3u8\/MPD\uff09\u8bbe\u7f6e\u8f83\u77ed\u7684 max-age\uff0c\u5e76\u914d\u5408 ETag\/Last-Modified \u5b9e\u73b0\u589e\u91cf\u5237\u65b0\u3002<\/li>\n<li>\u652f\u6301\u5b57\u8282\u8303\u56f4\uff08Range\uff09\u4e0e\u65ad\u70b9\u7eed\u4f20\uff0c\u6e90\u7ad9\u4e0e CDN \u90fd\u9700\u6b63\u786e\u5904\u7406 206 Partial Content\u3002<\/li>\n<\/ul>\n<h3>\u4f18\u5316 Cache Key \u4e0e\u53bb\u53c2\u6570\u5316<\/h3>\n<p>\u5f88\u591a URL \u5e26\u6709\u65e0\u5173 query\uff08UTM\u3001sessionid \u7b49\uff09\uff0c\u4f1a\u5bfc\u81f4\u540c\u4e00\u5bf9\u8c61\u88ab\u591a\u6b21\u7f13\u5b58\u3002\u5e94\u5728 CDN \u5c42\u914d\u7f6e\u53bb\u53c2\u6570\u5316\u89c4\u5219\uff0c\u4ec5\u4fdd\u7559\u5f71\u54cd\u5185\u5bb9\u7684\u53c2\u6570\uff08\u5982 bitrate\u3001segment index\uff09\u3002<\/p>\n<h3>\u4f7f\u7528\u5206\u5c42\u7f13\u5b58\u4e0e\u56de\u6e90\u9650\u6d41<\/h3>\n<ul>\n<li>\u90e8\u7f72\u4e2d\u95f4\u7f13\u5b58\uff08Origin Shield\uff09\u53ef\u4ee5\u5c06\u6765\u81ea\u8fb9\u7f18\u7684\u56de\u6e90\u8bf7\u6c42\u5408\u5e76\uff0c\u51cf\u5c11\u5e76\u53d1\u56de\u6e90\u6b21\u6570\u3002<\/li>\n<li>\u8bbe\u7f6e\u56de\u6e90\u9650\u6d41\uff08rate 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