{"id":209851,"date":"2025-10-24T00:15:51","date_gmt":"2025-10-23T16:15:51","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209851\/"},"modified":"2025-10-24T00:15:52","modified_gmt":"2025-10-23T16:15:52","slug":"cdn-160","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209851\/","title":{"rendered":"CDN\u534f\u8bae\u652f\u6301\u5dee\u5f02\u89e3\u6790\uff1a\u4eceHTTP\/1.1\u5230HTTP\/3\/QUIC\u7684\u9009\u578b\u8981\u70b9"},"content":{"rendered":"<p>\u968f\u7740\u7f51\u7edc\u5e94\u7528\u5bf9\u6027\u80fd\u548c\u53ef\u9760\u6027\u8981\u6c42\u7684\u4e0d\u65ad\u63d0\u9ad8\uff0c\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u5728\u8de8\u5730\u57df\u52a0\u901f\u3001\u6297\u51fb\u6d41\u91cf\u7a81\u53d1\u548c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u65b9\u9762\u7684\u4f5c\u7528\u6108\u53d1\u91cd\u8981\u3002\u9009\u62e9\u4f55\u79cd\u4f20\u8f93\u534f\u8bae\u6765\u627f\u8f7d CDN \u7684\u6570\u636e\u4f20\u8f93\uff0c\u662f\u5f71\u54cd\u5ef6\u8fdf\u3001\u541e\u5410\u3001\u79fb\u52a8\u7aef\u4f53\u9a8c\u548c\u8fd0\u7ef4\u590d\u6742\u5ea6\u7684\u5173\u952e\u56e0\u7d20\u3002\u4ece\u957f\u671f\u5e7f\u6cdb\u90e8\u7f72\u7684 HTTP\/1.1\uff0c\u5230\u5f15\u5165\u591a\u8def\u590d\u7528\u548c\u5934\u90e8\u538b\u7f29\u7684 HTTP\/2\uff0c\u518d\u5230\u57fa\u4e8e UDP \u7684 QUIC \u4e0e HTTP\/3\uff0c\u6bcf\u4e00\u4ee3\u534f\u8bae\u90fd\u5728\u89e3\u51b3\u4e0d\u540c\u7684\u74f6\u9888\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\uff0c<strong>\u6df1\u5165\u5256\u6790\u5404\u534f\u8bae\u539f\u7406\u3001\u9002\u7528\u573a\u666f\u4e0e\u4f18\u52bf\u6bd4\u8f83<\/strong>\uff0c\u5e76\u7ed9\u51fa\u5728\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u6d77\u5916\u670d\u52a1\u5668\u7b49\u8282\u70b9\u5e03\u5c40\u60c5\u51b5\u4e0b\u7684\u9009\u578b\u5efa\u8bae\uff0c\u5e2e\u52a9\u4f60\u5728\u90e8\u7f72 CDN \u6216\u8bc4\u4f30\u4e91\u670d\u52a1\uff08\u5982\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u65f6\u505a\u51fa\u66f4\u5408\u9002\u7684\u51b3\u7b56\u3002<\/p>\n<h2>\u534f\u8bae\u539f\u7406\u6982\u8ff0\uff1a\u4ece TCP + TLS \u5230 QUIC \u7684\u6f14\u8fdb<\/h2>\n<p>\u7406\u89e3\u534f\u8bae\u5dee\u5f02\u7684\u7b2c\u4e00\u6b65\u662f\u638c\u63e1\u5176\u5e95\u5c42\u8bbe\u8ba1\u8981\u70b9\u3002<\/p>\n<h3>HTTP\/1.1\uff08\u57fa\u4e8e TCP\uff09<\/h3>\n<p>HTTP\/1.1 \u4f7f\u7528 TCP \u4f5c\u4e3a\u4f20\u8f93\u5c42\uff0c\u91c7\u7528\u6587\u672c\u534f\u8bae\u4e0e\u8bf7\u6c42\/\u54cd\u5e94\u6a21\u578b\u3002\u4e3b\u8981\u7279\u70b9\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8fde\u63a5\u590d\u7528\u53d7\u9650\uff1a\u867d\u7136\u6709 keep-alive\uff0c\u4f46\u5355\u4e2a TCP \u8fde\u63a5\u4e0a\u540c\u65f6\u5e76\u53d1\u8bf7\u6c42\u6709\u9650\uff0c\u5e38\u89c1\u4e3a pipelining \u652f\u6301\u4e0d\u4f73\u3002<\/li>\n<li>\u5934\u90e8\u5197\u4f59\uff1a\u6bcf\u6b21\u8bf7\u6c42\/\u54cd\u5e94\u90fd\u4f1a\u5e26\u5927\u91cf\u91cd\u590d\u5934\u90e8\uff0c\u589e\u52a0\u5e26\u5bbd\u5f00\u9500\u3002<\/li>\n<li>\u6162\u542f\u52a8\u4e0e\u961f\u5934\u963b\u585e\uff08Head-of-Line Blocking\uff0cTCP-level HOL\uff09\uff1a\u4e22\u5305\u5bfc\u81f4\u6574\u4e2a\u8fde\u63a5\u6062\u590d\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>HTTP\/2\uff08\u57fa\u4e8e TCP + TLS\uff09<\/h3>\n<p>HTTP\/2 \u5728\u540c\u4e00 TCP \u8fde\u63a5\u4e0a\u5f15\u5165\u4e86\u591a\u8def\u590d\u7528\u3001\u4e8c\u8fdb\u5236\u5e27\u548c\u5934\u538b\u7f29\uff08HPACK\uff09\uff0c\u663e\u8457\u6539\u5584\u4e86\u9875\u9762\u52a0\u8f7d\u6027\u80fd\u3002\u4f46\u4ecd\u4f9d\u8d56\u4e8e TCP\uff0c\u5b58\u5728\u56fa\u6709\u7f3a\u9677\uff1a<\/p>\n<ul>\n<li>\u89e3\u51b3\u4e86\u5e94\u7528\u5c42\u7684\u5e76\u53d1\u95ee\u9898\uff0c\u4f46\u5728 TCP \u5c42\u4ecd\u4f1a\u9047\u5230 HOL \u963b\u585e\uff1a\u4e00\u65e6\u6570\u636e\u5305\u4e22\u5931\uff0c\u6574\u4e2a\u8fde\u63a5\u4e0a\u7684\u6240\u6709\u6d41\u90fd\u4f1a\u88ab\u963b\u585e\u76f4\u5230\u4e22\u5931\u5305\u91cd\u4f20\u3002<\/li>\n<li>TLS \u63e1\u624b\u548c TCP \u4e09\u6b21\u63e1\u624b\u5bfc\u81f4\u7684\u8fde\u63a5\u5efa\u7acb\u5ef6\u8fdf\u5728\u9ad8\u4e22\u5305\u6216\u9ad8 RTT \u573a\u666f\u4e2d\u4ecd\u7136\u660e\u663e\u3002<\/li>\n<\/ul>\n<h3>HTTP\/3 \/ QUIC\uff08\u57fa\u4e8e UDP\uff09<\/h3>\n<p>QUIC \u5c06\u4f20\u8f93\u5c42\u8fc1\u79fb\u81f3 UDP\uff0c\u5e76\u5728\u7528\u6237\u6001\u5b9e\u73b0\u62e5\u585e\u63a7\u5236\u3001\u91cd\u4f20\u4e0e\u591a\u8def\u590d\u7528\uff1bHTTP\/3 \u5219\u5728 QUIC \u4e4b\u4e0a\u8fd0\u884c\u3002\u5173\u952e\u4f18\u52bf\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u5185\u7f6e\u8fde\u63a5\u8fc1\u79fb\u4e0e 0-RTT\/1-RTT \u5efa\u8fde\uff1a\u79fb\u52a8\u73af\u5883\u6216 IP \u53d8\u66f4\u80fd\u4fdd\u6301\u4f1a\u8bdd\u4e0d\u4e2d\u65ad\u3002<\/li>\n<li>\u907f\u514d TCP \u5c42 HOL\uff1aQUIC \u5728\u6d41\u7ea7\u522b\u505a\u72ec\u7acb\u91cd\u4f20\uff0c\u5355\u4e2a\u6d41\u7684\u4e22\u5305\u4e0d\u4f1a\u963b\u585e\u540c\u4e00\u8fde\u63a5\u4e0a\u7684\u5176\u4ed6\u6d41\u3002<\/li>\n<li>\u66f4\u5feb\u7684\u63e1\u624b\uff1a\u7ed3\u5408 TLS 1.3\uff0c\u53ef\u4ee5\u5b9e\u73b0\u66f4\u4f4e\u7684\u8fde\u63a5\u5efa\u7acb\u5ef6\u8fdf\u3002<\/li>\n<li>\u7528\u6237\u6001\u5b9e\u73b0\u7075\u6d3b\u5ea6\u9ad8\uff1a\u53ef\u5feb\u901f\u8fed\u4ee3\u62e5\u585e\u63a7\u5236\u7b97\u6cd5\uff0c\u5e76\u4f18\u5316\u5bf9\u79fb\u52a8\u7f51\u7edc\u7684\u9002\u914d\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u7ec6\u5316\uff1a\u54ea\u4e2a\u534f\u8bae\u66f4\u9002\u5408\u4f60\u7684 CDN \u8282\u70b9\uff1f<\/h2>\n<h3>\u9759\u6001\u8d44\u6e90\u4e0e\u5168\u7403\u5206\u53d1<\/h3>\n<p>\u5bf9\u4e8e\u5927\u91cf\u5c0f\u6587\u4ef6\uff08CSS\u3001JS\u3001\u56fe\u6807\uff09\u7684\u52a0\u901f\uff0c\u51cf\u5c11\u6bcf\u4e2a\u8bf7\u6c42\u7684\u5ef6\u8fdf\u548c\u5934\u90e8\u5f00\u9500\u81f3\u5173\u91cd\u8981\u3002HTTP\/2 \u7684\u591a\u8def\u590d\u7528\u548c\u5934\u90e8\u538b\u7f29\u5df2\u7ecf\u5e26\u6765\u660e\u663e\u6539\u8fdb\uff0c\u4f46\u5728\u9ad8\u4e22\u5305\u94fe\u8def\uff08\u4ece\u5927\u9646\u5230\u6d77\u5916\u8282\u70b9\u3001\u6216\u65e0\u7ebf\u94fe\u8def\uff09\u65f6\uff0cHTTP\/3\/QUIC \u7684\u6d41\u7ea7\u91cd\u4f20\u4e0e\u66f4\u5feb\u7684\u63e1\u624b\u80fd\u663e\u8457\u964d\u4f4e\u603b\u4f53\u52a0\u8f7d\u65f6\u95f4\u3002<\/p>\n<h3>\u5a92\u4f53\u6d41\u4e0e\u5927\u6587\u4ef6\u4f20\u8f93<\/h3>\n<p>\u89c6\u9891\u3001\u97f3\u9891\u6216\u5927\u6587\u4ef6\u4e0b\u8f7d\u66f4\u5173\u5fc3\u541e\u5410\u4e0e\u7a33\u5b9a\u6027\u3002\u4f20\u7edf\u4e0a TCP \u7684\u53ef\u9760\u4f20\u8f93\u548c\u6210\u719f\u7684\u62e5\u585e\u63a7\u5236\u4f7f\u5176\u5728\u957f\u65f6\u4f20\u8f93\u4e0a\u8868\u73b0\u7a33\u5065\u3002\u4f46\u5728\u7f51\u7edc\u6296\u52a8\u8f83\u5927\u6216\u5ba2\u6237\u7aef\u5207\u6362\u7f51\u7edc\uff08Wi-Fi4G\uff09\u65f6\uff0cQUIC \u7684\u8fde\u63a5\u8fc1\u79fb\u4e0e\u66f4\u7075\u6d3b\u7684\u62e5\u585e\u7b97\u6cd5\u4f1a\u51cf\u5c11\u4e2d\u65ad\uff0c\u63d0\u5347\u8fde\u7eed\u64ad\u653e\u4f53\u9a8c\u3002\u56e0\u6b64\u5982\u679c\u4f60\u7684 CDN \u9762\u5411\u79fb\u52a8\u7528\u6237\u6216\u7ecf\u5e38\u5728\u9999\u6e2f\u3001\u4e1c\u5357\u4e9a\u8282\u70b9\uff08\u5982\u65b0\u52a0\u5761\u3001\u65e5\u672c\u3001\u97e9\u56fd\uff09\u4e4b\u95f4\u5207\u6362\uff0cHTTP\/3 \u66f4\u6709\u5438\u5f15\u529b\u3002<\/p>\n<h3>\u5b9e\u65f6\u4ea4\u4e92\u4e0e API \u573a\u666f<\/h3>\n<p>\u4f4e\u5ef6\u8fdf RPC\u3001\u5b9e\u65f6\u534f\u4f5c\u5de5\u5177\u6216\u6e38\u620f\u670d\u52a1\u5668\u901a\u5e38\u53d7\u76ca\u4e8e\u66f4\u77ed\u7684\u5f80\u8fd4\u65f6\u5ef6\u548c\u5feb\u901f\u6062\u590d\u80fd\u529b\u3002QUIC \u5728\u51cf\u5c11\u63e1\u624b\u548c\u5e94\u5bf9\u4e22\u5305\u65b9\u9762\u4f18\u4e8e TCP\uff0c\u80fd\u591f\u63d0\u4f9b\u66f4\u4f18\u7684\u5b9e\u65f6\u6027\u80fd\u3002\u6b64\u5916\uff0c\u57df\u540d\u89e3\u6790\u4e0e TLS \u7ed3\u5408\u7684\u4f18\u5316\u4e5f\u80fd\u51cf\u5c11\u9996\u6b21\u8bf7\u6c42\u5ef6\u8fdf\u3002<\/p>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u4ece\u5ef6\u8fdf\u3001\u53ef\u9760\u6027\u5230\u8fd0\u7ef4\u6210\u672c<\/h2>\n<p>\u4e0b\u9762\u5bf9\u5173\u952e\u7ef4\u5ea6\u505a\u76f4\u63a5\u6bd4\u8f83\uff0c\u5e2e\u52a9\u4f60\u6743\u8861\u53d6\u820d\u3002<\/p>\n<h3>\u8fde\u63a5\u5efa\u7acb\u4e0e\u9996\u6b21\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09<\/h3>\n<ul>\n<li>HTTP\/1.1\uff1aTCP + TLS \u7684\u5b8c\u6574\u63e1\u624b\u5bfc\u81f4\u8f83\u9ad8\u7684 TTFB\uff0c\u5c24\u5176\u5728\u9ad8 RTT \u573a\u666f\u3002<\/li>\n<li>HTTP\/2\uff1a\u4f9d\u8d56\u540c\u6837\u7684 TCP\/TLS \u63e1\u624b\uff0c\u4f46\u957f\u8fde\u63a5\u590d\u7528\u80fd\u964d\u4f4e\u540e\u7eed\u8bf7\u6c42\u7684 TTFB\u3002<\/li>\n<li>HTTP\/3\uff1a\u7ed3\u5408 QUIC \u548c TLS 1.3\uff0c\u53ef\u5b9e\u73b0 0-RTT \u6216 1-RTT \u5efa\u8fde\uff0c\u663e\u8457\u964d\u4f4e\u9996\u6b21\u8bf7\u6c42\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u4e22\u5305\u6062\u590d\u4e0e\u7528\u6237\u4f53\u9a8c<\/h3>\n<ul>\n<li>TCP\uff08HTTP\/1.1\u3001HTTP\/2\uff09\uff1a\u4e22\u5305\u4f1a\u89e6\u53d1\u6574\u4f53\u8fde\u63a5\u7ea7\u522b\u7684\u91cd\u4f20\uff0c\u5bfc\u81f4 HOL \u963b\u585e\u3002<\/li>\n<li>QUIC\uff08HTTP\/3\uff09\uff1a\u6d41\u7ea7\u522b\u91cd\u4f20\u907f\u514d\u4e86\u5168\u5c40\u963b\u585e\uff0c\u5c24\u5176\u5728\u65e0\u7ebf\u548c\u8de8\u6d0b\u94fe\u8def\u4e0a\u4f53\u9a8c\u66f4\u7a33\u5b9a\u3002<\/li>\n<\/ul>\n<h3>\u90e8\u7f72\u4e0e\u517c\u5bb9\u6027<\/h3>\n<ul>\n<li>TCP\/TLS\uff08HTTP\/1.1\/2\uff09\u6210\u719f\uff0c\u51e0\u4e4e\u6240\u6709\u8fb9\u7f18\u8282\u70b9\u3001\u4ee3\u7406\u4e0e\u9632\u706b\u5899\u652f\u6301\u826f\u597d\u3002<\/li>\n<li>QUIC\/HTTP3 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\u57fa\u7840\u8bbe\u65bd\u6210\u719f\uff0c\u95ee\u9898\u6392\u67e5\u5de5\u5177\u94fe\u66f4\u5b8c\u5584\u3002<\/li>\n<\/ul>\n<h2>\u9009\u8d2d\u5efa\u8bae\uff1a\u5982\u4f55\u5728\u9999\u6e2f\u670d\u52a1\u5668\/\u7f8e\u56fd\u670d\u52a1\u5668\u7b49\u8282\u70b9\u4e0a\u9009\u62e9\u534f\u8bae\u4e0e\u90e8\u7f72\u7b56\u7565<\/h2>\n<p>\u4e0b\u9762\u7ed9\u51fa\u5177\u4f53\u53ef\u6267\u884c\u7684\u9009\u578b\u5efa\u8bae\uff0c\u7ed3\u5408\u5730\u57df\u8282\u70b9\uff08\u9999\u6e2fVPS\u3001\u7f8e\u56fdVPS\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff09\u548c\u5178\u578b\u4e1a\u52a1\u7c7b\u578b\uff1a<\/p>\n<h3>1. \u9762\u5411\u5168\u7403\u7528\u6237\u3001\u5305\u542b\u79fb\u52a8\u7aef\u7684\u9759\u6001\u52a0\u901f\uff08\u63a8\u8350\u6e10\u8fdb\u5f0f\u4f7f\u7528 HTTP\/3\uff09<\/h3>\n<ul>\n<li>\u5728\u8fb9\u7f18\u8282\u70b9\uff08\u9999\u6e2f\u3001\u4e1c\u4eac\u3001\u65b0\u52a0\u5761\u3001\u6d1b\u6749\u77f6\u7b49\uff09\u542f\u7528 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