{"id":488,"date":"2022-08-14T00:04:13","date_gmt":"2022-08-13T16:04:13","guid":{"rendered":"https:\/\/himpqblog.cn\/?p=488"},"modified":"2022-09-10T20:34:17","modified_gmt":"2022-09-10T12:34:17","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3-http2","status":"publish","type":"post","link":"https:\/\/himpqblog.cn\/index.php\/archives\/488","title":{"rendered":"\u6df1\u5165\u7406\u89e3 HTTP2"},"content":{"rendered":"\n<p>\u4f17\u6240\u5468\u77e5\uff0cHTTP2\u662f\u4f7f\u7528\u4e8c\u8fdb\u5236\u6765\u4f20\u8f93\u6570\u636e\u7684\uff0c\u76f8\u6bd4\u4e8eHTTP\/1.1\u7684\u660e\u6587\u4f20\u8f93\u53ef\u8bfb\u6027\u5f88\u5dee\uff0c\u5e76\u4e14\u5927\u90e8\u5206\u6d4f\u89c8\u5668\u53ea\u652f\u6301\u52a0\u5bc6\u7684HTTP2\uff0c\u6240\u4ee5\u5bf9\u4e8e\u5927\u90e8\u5206\u4ecb\u7ecd\u5148\u57fa\u4e8eHTTP\/1.1\u518d\u901a\u8fc7<strong><em>Upgrade<\/em><\/strong>\u5934\u8fdb\u884c\u5347\u7ea7\u7684\u6587\u7ae0\u4f60\u57fa\u672c\u53ef\u4ee5\u4e0d\u8bfb\u4e0b\u53bb\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">HTTP\/1.1\u4e0eHTTP2\u7684\u5bf9\u6bd4<\/h2>\n\n\n\n<p>HTTP\/1.1\u4ecd\u5728\u88ab\u7edd\u5927\u90e8\u5206\u7f51\u7ad9\u652f\u6301\u7740\uff0c\u4e14\u5728\u672a\u67653\u5e74\u5185\u4e0d\u4f1a\u88ab\u6dd8\u6c70\uff08\u731c\u6d4b\uff09<\/p>\n\n\n\n<p>HTTP\/1.1\u7684\u957f\u8fde\u63a5\u80fd\u6709\u6548\u7684\u51cf\u5c11\u591a\u6587\u4ef6\u8bf7\u6c42\u65f6\u7684\u5ef6\u8fdf\uff0c\u4f46\u662f\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u5fc5\u987b\u8981\u6309\u7167\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u6570\u636e\u8fdb\u884c\u54cd\u5e94\uff0c\u5426\u5219\u6570\u636e\u4f1a\u7a9c\u53f0\u3002<\/p>\n\n\n\n<p>\u76f8\u6bd4\u4e8eHTTP\/1.1\uff0cHTTP2\u4f7f\u7528\u591a\u8def\u590d\u7528\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u5b9a\u4e49\u4e00\u4e2a\u6700\u5c0f\u7684\u6570\u636e\u5355\u4f4d\u2014\u2014\u5e27\uff0c\u5404\u4e2a\u5e27\u5728\u540c\u4e00\u8fde\u63a5\u4e0a\u4f20\u8f93\uff0c\u6240\u4ee5\u4e0d\u540c\u6587\u4ef6\u7684\u6570\u636e\u53ef\u4ee5\u4ea4\u53c9\u4f20\u8f93\uff0c\u4f46\u662f\u4e5f\u662f\u65e0\u6cd5\u53d1\u9001\u6587\u4ef6\u6570\u636e\u7684\u987a\u5e8f\uff08\u5373\u53d1\u9001\u4e00\u4e2a\u6587\u4ef6\u4f60\u65e0\u6cd5\u5148\u53d1\u9001\u5c3e\u90e8\u518d\u53d1\u9001\u5934\u90e8\uff0c\u5fc5\u987b\u7531\u5934\u81f3\u5c3e\uff09<\/p>\n\n\n\n<p>HTTP\/1.1\u7684\u8bf7\u6c42\u5934\u54cd\u5e94\u5934\u5728\u6709\u65f6Cookie\u6570\u636e\u91cf\u5927\u7684\u65f6\u5019\u5360\u7528\u751a\u81f3\u6bd4\u54cd\u5e94\u7684\u6570\u636e\u8fd8\u8981\u5927\uff0c\u6240\u4ee5HTTP2\u4f7f\u7528\u4e86\u5934\u90e8\u538b\u7f29\uff08HPack\uff09\u5bf9\u5934\u90e8\u8fdb\u884c\u538b\u7f29\uff0c\u5f53\u591a\u4e2a\u8bf7\u6c42\u5934\u6216\u54cd\u5e94\u5934\u51fa\u73b0\u76f8\u540c\u7684\u4fe1\u606f\u65f6\u5360\u7528\u660e\u663e\u51cf\u5c11\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fde\u63a5<\/h2>\n\n\n\n<p>\u8fde\u63a5\u9636\u6bb5\uff0c\u5bf9\u4e8eHTTP\/1.1\u76f4\u63a5\u8fde\u63a5\u4ea4\u6362\u6570\u636e\u5373\u53ef\uff0c\u800cHTTP\/2\u6839\u636e\u7f51\u7edc\u4f60\u4eec\u4e5f\u80fd\u770b\u5230\u901a\u8fc7Upgrade\u5934\u8fdb\u884c\u5347\u7ea7\u7684\u4f8b\u5b50\uff0c\u4f46\u5bf9\u4e8e\u76f4\u63a5\u8fdb\u884cHTTPS\u8fde\u63a5\u7684HTTP2\uff0c\u53cc\u65b9\u5728\u63e1\u624b\u9636\u6bb5\u5c31\u4f1a\u76f4\u63a5\u4ea4\u6362\u6240\u652f\u6301\u7684\u534f\u8bae<\/p>\n\n\n\n<p>\u5927\u90e8\u5206\u90fd\u662f\u5728ALPN\u4e2d\u8bbe\u7f6e(Python)\uff1a<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"CSS\" data-shcb-language-slug=\"css\"><span><code class=\"hljs language-css\"><span class=\"hljs-selector-tag\">sslsocket<\/span><span class=\"hljs-selector-class\">.set_alpn_protocols<\/span>(<span class=\"hljs-selector-attr\">&#91;<span class=\"hljs-string\">\"h2\"<\/span>, <span class=\"hljs-string\">\"http\/1.1\"<\/span>]<\/span>)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">CSS<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">css<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>\u4e5f\u80fd\u4ece\u4e2d\u770b\u5230\uff0cHTTP2\u7684\u7b80\u5199\u5c31\u662fh2\u3002<\/p>\n\n\n\n<p>\u5efa\u7acb\u8fde\u63a5\u4e4b\u540e\uff08\u63e1\u624b\u4e4b\u540e\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"CSS\" data-shcb-language-slug=\"css\"><span><code class=\"hljs language-css\"><span class=\"hljs-selector-tag\">sslsocket<\/span><span class=\"hljs-selector-class\">.selected_alpn_protocol<\/span>()<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">CSS<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">css<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>\u6765\u83b7\u53d6\u5ba2\u6237\u7aef\u9009\u62e9\u4f7f\u7528\u7684\u534f\u8bae\u3002<\/p>\n\n\n\n<p>\u81ea\u6b64\uff0c\u8fde\u63a5\u9636\u6bb5\u7ed3\u675f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u4f20\u8f93<\/h2>\n\n\n\n<p>\u5728\u8fdb\u884c\u6b63\u5f0f\u6570\u636e\u4f20\u8f93\u524d\uff0c\u5ba2\u6237\u7aef\u4f1a\u5148\u53d1\u9001\u4e00\u4e2aMagic\u5e27\uff0c\u5927\u5c0f\u4e3a24\u5b57\u8282\uff0c\u5176\u5185\u5bb9\u4e3a<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">PRI * HTTP\/2.0\\r\\n\\r\\nSM\\r\\n\\r\\n<\/code><\/span><\/pre>\n\n\n<p>\u5176\u4e2dPRISM\u5bf9\u5e94\u7740\u68f1\u955c\u95e8\u4e8b\u4ef6\uff0c\u6307\u7684\u662f\u7f8e\u56fd\u653f\u5e9c\u7684\u4e00\u4e2a\u76d1\u542c\u7fa4\u4f17\u83b7\u53d6\u7fa4\u4f17\u9690\u79c1\u7684\u8ba1\u5212\uff0c\u5176\u4e2d\u5305\u62ec\u5fae\u8f6f\u96c5\u864e\u5728\u5185\u7684\u4e5d\u5bb6\u516c\u53f8\uff0c\u8fd9\u91cc\u4e0d\u518d\u53d9\u8ff0\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u8fd9\u662f\u4e00\u4e2aHTTP\/1.1\u683c\u5f0f\u7684\u8bf7\u6c42\uff0c\u6240\u4ee5\u5f53\u670d\u52a1\u5668\u4e0d\u652f\u6301HTTP2\u65f6\u4f1a\u5904\u7406\u8be5\u9519\u8bef\uff0c\u4ee5\u9632\u6b62\u8fdb\u884c\u4f20\u8f93\u540e\u624d\u53d1\u73b0\u5bf9\u65b9\u4e0d\u54cd\u5e94\u7684\u5c34\u5c2c\u4e8b\u4ef6\u3002<\/p>\n\n\n\n<p>\u968f\u540e\u4fbf\u5f00\u59cb\u4f20\u8f93\u6570\u636e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u4f20\u8f93 &#8211; \u5e27<\/h2>\n\n\n\n<p>\u5e27\u771f\u7684\u662fHTTP2\u4e00\u5947\u5999\u7684\u8bbe\u8ba1\uff0c\u5e27\u75319\u4e2a\u5b57\u8282\u7684\u5e27\u5934\u548c\u8d1f\u8f7d\u90e8\u5206\u7ec4\u6210\uff0c\u4e8c\u8005\u4e3a\u4e00\u4e2a\u6574\u4f53\u3002<\/p>\n\n\n\n<p>\u5176\u4e2d\u5e27\u5934\u91cc\u9762\u5305\u542b\u7684\u5185\u5bb9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>3\u5b57\u8282 \u2014\u2014 \u8d1f\u8f7d\u957f\u5ea6   (Length)<\/li><li>1\u5b57\u8282 \u2014\u2014 \u5e27\u7c7b\u578b  (Type)<\/li><li>1\u5b57\u8282 \u2014\u2014 \u5e27\u6807\u8bc6  (Flags)<\/li><li>4\u5b57\u8282 \u2014\u2014 1\u6bd4\u7279\u7684R\u6807\u8bb0 + 31\u6bd4\u7279\u7684\u6d41\u6807\u8bc6<\/li><\/ul>\n\n\n\n<p>\u53ef\u80fd\u6709\u4eba\u8fd8\u4e0d\u660e\u767d\u6bd4\u7279\u548c\u5b57\u8282\u7684\u5173\u7cfb\uff0c\u4e00\u4e2a\u5b57\u8282\u75318\u4e2a\u6bd4\u7279\u7ec4\u6210\uff0c\u6bd4\u7279\u53ea\u67090\u548c1\uff0c\u6309\u7167\u5b57\u8282\u50a8\u5b58\u65b9\u5f0f\u7684\u4e0d\u540c\u8fd8\u6709\u5b57\u8282\u5e8f\uff08\u5012\u7740\u5b58\u50a8\u5b57\u8282\u6216\u6b63\u7740\u5b58\u50a8\uff09\u7b49\u3002<\/p>\n\n\n\n<p>\u8d1f\u8f7d\u957f\u5ea6\u544a\u8bc9\u4e86\u63a5\u6536\u8005\u9664\u4e86\u8bfb\u53d6\u8fd99\u5b57\u8282\u7684\u5e27\u5934\u8fd8\u9700\u8981\u8bfb\u53d6\u591a\u957f\u7684\u6570\u636e\uff0c\u5e27\u7c7b\u578b\u544a\u8bc9\u4e86\u63a5\u6536\u8005\u8fd9\u662f\u4ec0\u4e48\u5e27\uff0c\u5e27\u6807\u8bc6\u7528\u4e8e\u6807\u8bb0\u4fe1\u606f\uff0c\u6d41\u6807\u8bc6\u544a\u8bc9\u4e86\u8fd9\u662f\u5c5e\u4e8e\u54ea\u4e2a\u6d41\u4e0a\u7684\u6570\u636e\uff0c\u4f7f\u6570\u636e\u4e0d\u4f1a\u7a9c\u53f0\u3002<\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\u8bb2\u8bb2\u5e27\u7c7b\u578b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>0  &#8211;  Data\u5e27\uff0c\u7528\u4e8e\u4f20\u8f93\u6570\u636e<\/li><li>1  &#8211;  Header\u5e27\uff0c\u7528\u4e8e\u4f20\u8f93\u8bf7\u6c42\u5934\u548c\u54cd\u5e94\u5934<\/li><li>2  &#8211;  Priority\u5e27\uff0c\u7528\u4e8e\u544a\u8bc9\u6d41\u7684\u4f18\u5148\u7ea7<\/li><li>3  &#8211;  Rst_Stream\u5e27\uff0c\u7528\u4e8e\u544a\u8bc9\u670d\u52a1\u5668\u6216\u5ba2\u6237\u7aef\u8bf7\u6c42\u53d6\u6d88\uff0c\u522b\u5728\u8fd9\u4e2a\u6d41\u4e0a\u4f20\u8f93\u6570\u636e<\/li><li>4  &#8211;  Setting\u5e27\uff0c\u7528\u4e8e\u670d\u52a1\u5668\u4e0e\u5ba2\u6237\u7aef\u4e4b\u95f4\u4ea4\u6362\u8bbe\u5b9a\uff08\u4f8b\u5982\u5e27\u6700\u5927\u5927\u5c0f\uff09<\/li><li>5  &#8211;  Push_Promise\u5e27\uff0c\u670d\u52a1\u5668\u63a8\u9001\u6570\u636e\uff08\u5373\u5ba2\u6237\u7aef\u6ca1\u6709\u8bf7\u6c42\u4f46\u662f\u670d\u52a1\u5668\u8fd8\u662f\u5148\u53d1\u8fc7\u6765\uff09<\/li><li>6  &#8211;  Ping\u5e27\uff0c\u7528\u4e8e\u957f\u65f6\u95f4\u4e0d\u4f20\u8f93\u6570\u636e\u540e\u8be2\u95ee\u5bf9\u65b9\u662f\u5426\u8fd8\u4fdd\u6301\u7740\u8fde\u63a5<\/li><li>7  &#8211;  GoAway\u5e27\uff0c\u7528\u4e8e\u5173\u95ed\u8fde\u63a5\uff08\u5176\u4e2d\u9644\u5e26\u539f\u56e0\u548c\u9519\u8bef\u4fe1\u606f\uff09<\/li><li>8  &#8211;  Window_Update\u5e27\uff0c\u7528\u4e8e\u5b9e\u73b0\u6d41\u91cf\u63a7\u5236<\/li><li>9  &#8211;  Continuation\u5e27\uff0c\u7528\u4e8e\u5bf9\u5934\u90e8\u7684\u9644\u52a0<\/li><\/ul>\n\n\n\n<p>\u517110\u4e2a\u5e27\u7c7b\u578b\uff0c\u5176\u4e2d\u771f\u6b63\u5e38\u7528\u7684\u53ea\u6709Data\u5e27\uff0cHeader\u5e27\uff0cRst_Stream\u5e27\uff0cSetting\u5e27\uff0cGoAway\u5e27\uff0cWindow_Update\u5e27<\/p>\n\n\n\n<p>\u5e27\u7c7b\u578b\u7b49\u5230\u4e0b\u6b21\u518d\u8fdb\u884c\u8be6\u89e3\uff08\u4ece\u6570\u636e\u5c42\u9762\u63d0\u4f9b\u4f8b\u5b50\u8be6\u7ec6\u89e3\u8bf4\uff0c\u800c\u4e0d\u662f\u5355\u7eaf\u7ed9\u4f60\u4e2a\u6846\u67b6\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u4f20\u8f93 &#8211; 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