{"id":1282,"date":"2015-04-03T16:22:39","date_gmt":"2015-04-03T08:22:39","guid":{"rendered":"http:\/\/www.dogeye.net\/?p=1282"},"modified":"2015-04-03T16:22:39","modified_gmt":"2015-04-03T08:22:39","slug":"http2%e7%ae%80%e5%8d%95%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/ykyi.net\/?p=1282","title":{"rendered":"HTTP2\u7b80\u5355\u6559\u7a0b"},"content":{"rendered":"

\u8bd1\u81ea\uff1ahttp:\/\/qnimate.com\/post-series\/http2-complete-tutorial\/<\/a><\/p>\n

HTTP1.1\u662f\u57281999\u5e74\u7684\u65f6\u5019\u88ab\u5f15\u5165\u4e1a\u754c\u7684\u3002\u4ece\u5f53\u65f6\u5230\u73b0\u5728\uff0cWEB\u5df2\u7ecf\u53d1\u751f\u4e86\u76f8\u5f53\u5927\u7684\u53d8\u5316\u3002\u5f88\u591a\u4eba\u5f00\u59cb\u7528\u79fb\u52a8\u8bbe\u5907\u4e0a\u7f51\uff0c\u6709\u4e9b\u79fb\u52a8\u73af\u5883\u4e0b\u7f51\u7edc\u8d28\u91cf\u975e\u5e38\u4e0d\u7a33\u5b9a\u3002\u53e6\u5916\uff0cWEB\u9875\u9762\u7684\u5185\u5bb9\u4e5f\u76f8\u5f53\u7684\u4e30\u5bcc\u4e86\u3002\u8fd9\u4e9b\u90fd\u8d1f\u9762\u5f71\u54cd\u4e86WEB\u9875\u9762\u7684\u52a0\u8f7d\u65f6\u95f4\u3002\u56e0\u6b64\uff0c\u9700\u8981\u4e00\u4e2a\u65b0\u7684\u534f\u8bae\u6765\u52a0\u901fWEB\u7684\u52a0\u8f7d\u3002<\/p>\n

 <\/p>\n

HTTP\/2<\/strong>\u548c<\/strong>SPDY<\/strong>\u7684\u533a\u522b\uff1a<\/strong><\/p>\n

SPDY\u662f\u8c37\u6b4c\u4e8e2009\u5e74\u521b\u9020\u7684\u534f\u8bae\uff0c\u65e8\u5728WEB\u5ef6\u8fdf\u4ee5\u53ca\u589e\u5f3a\u5b89\u5168\u6027\u3002<\/p>\n

HTTP\/2\u662fSPDY\u7684\u4e00\u4e2a\u514b\u9686\u3002\u8c37\u6b4c\u5df2\u7ecf\u505c\u6b62\u4e86\u7ee7\u7eed\u5f00\u53d1SPDY\uff0c\u5e76\u4e14\u628a\u5de5\u4f5c\u8f6c\u79fb\u5230\u4e86HTTP\/2\u4e0a\u6765\u3002<\/p>\n

 <\/p>\n

HTTP\/2<\/strong>\u7684\u76ee\u6807\uff1a<\/strong><\/p>\n

    \n
  1. \u51cf\u5c11\u52a0\u8f7d\u5ef6\u65f6\u3002<\/li>\n
  2. \u51cf\u5c11TCP\u8fde\u63a5\u6570\u3002<\/li>\n
  3. \u589e\u5f3a\u7684\u7f51\u7edc\u5b89\u5168\u3002<\/li>\n
  4. \u4fdd\u6301\u548cHTTP\/1.1\u7684\u517c\u5bb9\u3002<\/li>\n<\/ol>\n

     <\/p>\n

    HTTP\/2<\/strong>\u7684\u529f\u80fd\uff1a<\/strong><\/p>\n

      \n
    1. \u591a\u8def\u590d\u7528Multiplexing\uff1a\u5f88\u591a\u4e2a\u5f02\u6b65\u7684HTTP\u8bf7\u6c42\u53ea\u4f7f\u7528\u4e00\u4e2aTCP\u7684\u8fde\u63a5\u3002<\/li>\n
    2. \u670d\u52a1\u7aefPUSH\uff1a\u5bf9\u4e8e\u4e00\u4e2a\u8bf7\u6c42\u53ef\u80fd\u6709\u591a\u4e2a\u56de\u590d\u3002<\/li>\n
    3. \u5934\u90e8\u538b\u7f29\uff1a\u538b\u7f29\u5934\u90e8(headers)\u3002<\/li>\n
    4. \u8bf7\u6c42\u5206\u7ea7\uff1a\u5bf9\u540c\u4e00\u4e2a\u57df\u540d\u7684\u8bf7\u6c42\u53ef\u4f5c\u4f18\u5148\u7ea7\u5206\u7ea7\u3002<\/li>\n
    5. \u4e8c\u8fdb\u5236\u534f\u8bae\uff1aHTTP\/2\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u534f\u8bae\uff0c\u800cHTTP\/1.1\u662f\u4e00\u4e2a\u6587\u672c\u534f\u8bae\u3002<\/li>\n<\/ol>\n

       <\/p>\n

      HTTP\/2<\/strong>\u89e3\u51b3\u4e86<\/strong>HTTP\/1.1<\/strong>\u7684\u54ea\u4e9b\u95ee\u9898\uff1a<\/strong><\/p>\n

        \n
      1. HTTP\u7ba1\u9053(HTTP pipelining)\uff1a\u4e00\u4e9bHTTP1.1\u5ba2\u6237\u7aef\u4f7f\u7528\u4e86HTTP\u7ba1\u9053\u6280\u672f\u6765\u51cf\u5c11TCP\u8fde\u63a5\u6570\u3002HTTP\u7ba1\u9053\u6307\u7684\u662f\u591a\u4e2aHTTP\u8bf7\u6c42\u88ab\u53d1\u5f80\u540c\u4e00\u4e2aTCP\u8fde\u63a5\uff0c\u800c\u4e0d\u7b49\u5f85\u524d\u4e00\u4e2a\u8bf7\u6c42\u7684\u56de\u590d\u3002\u4f46\u662f\u670d\u52a1\u7aef\u53d1\u9001\u56de\u590d\u65f6\u7684\u987a\u5e8f\u548c\u6536\u5230\u7684\u8bf7\u6c42\u7684\u987a\u5e8f\u4e00\u6837\u3002\u56e0\u6b64\uff0c\u9020\u6210\u4e86HOL\u963b\u585e\u95ee\u9898(head-of-line blocking)\u3002HOL Blocking\u7b80\u5355\u5730\u8bf4\u662f\u4e00\u4e2a\u56de\u590d\u7684\u5ef6\u8fdf\u4f1a\u4f7f\u5f97\u6392\u5728\u5b83\u540e\u9762\u7684\u56de\u590d\u90fd\u4f1a\u5ef6\u8fdf\u3002HTTP\/2\u900f\u8fc7\u5f15\u7528\u591a\u8def\u590d\u7528(Multiplexing)\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002\u591a\u4e2aHTTP\u8bf7\u6c42\u548c\u591a\u4e2aHTTP\u56de\u590d\u90fd\u4f7f\u7528\u540c\u4e00\u4e2aTCP\u8fde\u7eed\uff0c\u800c\u4e14HTTP\u56de\u590d\u7684\u987a\u5e8f\u4e0d\u9700\u8981\u4fdd\u6301HTTP\u8bf7\u6c42\u5230\u8fbe\u7684\u987a\u5e8f\u3002<\/li>\n
      2. \u540c\u4e00\u4e2a\u57df\u540d\u7684\u591a\u4e2aTCP\u8fde\u63a5\uff1a\u5728\u4f7f\u7528HTTP\/1.1\u65f6\uff0c\u9700\u8981\u5bf9\u540c\u4e00\u4e2a\u57df\u540d\u8d77\u591a\u4e2aTCP\u8fde\u63a5\u6765\u589e\u52a0\u541e\u5410\u91cf\u3002\u800c\u4f7f\u7528HTTP\/2\u65f6\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u57df\u540d\uff0c\u53ea\u5145\u8bb8\u6709\u4e00\u4e2aTCP\u8fde\u63a5\uff08only one TCP connection per domain is allowed\uff09\u3002\u6240\u6709\u7684\u8bf7\u6c42\u548c\u56de\u590d\u90fd\u901a\u8fc7\u552f\u4e00\u7684\u4e00\u4e2aTCP\u8fde\u63a5\u8fdb\u884c\u3002<\/li>\n
      3. TCP\u8fde\u63a5\u7684\u5173\u95ed\u65f6\u95f4\uff1a\u4f7f\u7528HTTP1.1\u65f6\uff0c\u4e00\u4e2aTCP\u8fde\u63a5\u5728\u8bf7\u6c42\u5b8c\u6210\u65f6\u7acb\u523b\u88ab\u5173\u95ed\u3002\u4f46\u5bf9\u4e8eHTTP\/2\uff0cTCP\u8fde\u63a5\u80fd\u5b58\u6d3b\u76f8\u5f53\u6210\u5730\u4e00\u6bb5\u65f6\u95f4\u3002<\/li>\n
      4. \u5934\u90e8\u538b\u7f29\uff1aHTTP\/1.1\u662f\u6ca1\u6709\u5934\u90e8\u538b\u7f29\u7684\uff0c\u4f46HTTP\/2\u5f15\u5165\u5934\u90e8\u538b\u7f29\u8fdb\u4e00\u6b65\u7684\u51cf\u5c11\u4e86\u5ef6\u65f6\u3002<\/li>\n<\/ol>\n

         <\/p>\n

        HTTP\/2<\/strong>\u5982\u4f55\u517c\u5bb9<\/strong>HTT\/1?<\/strong><\/p>\n

        HTTP\/2\u5ba2\u6237\u7aef\u5728\u4e0d\u786e\u5b9a\u5bf9\u65b9\u670d\u52a1\u5668\u662f\u5426\u652f\u6301HTTP\/2\u65f6\uff0c\u4f1a\u7528HTTP\/1\u534f\u8bae\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u65f6\u5e26\u4e0aUpgrade: HTTP\/2.0\u8fd9\u4e2a\u5934\u90e8\u3002\u5982\u679c\u5bf9\u65b9\u670d\u52a1\u5668\u652f\u6301HTTP\/2\uff0c\u5c31\u4f1a\u56de\u590dHTTP1.1 101\uff0c\u8868\u793a\u5207\u6362\u534f\u8bae(Switching Protocols status)\u3002\u800c\u5bf9\u4e8e\u8001\u65e7\u7684\u670d\u52a1\u5668\u5219\u7b80\u5355\u5730\u8fd4\u56deHTTP\/1.1\u7684\u72b6\u6001\u3002<\/p>\n

        HTTP\/2\u5ba2\u6237\u7aef\u53ef\u4ee5\u8bb0\u4e0b\u54ea\u4e9b\u670d\u52a1\u5668\u652f\u6301HTTP\/2\uff0c\u8fd9\u6837\uff0c\u4e0b\u6b21\u5c31\u53ef\u4ee5\u76f4\u63a5\u53d1\u8d77HTTP\/2\u8bf7\u6c42\uff0c\u800c\u4e0d\u5fc5\u518d\u7ecf\u8fc7\u4e00\u4e2a\u8be2\u95ee\u548c\u56de\u590d(Upgrade Round Trip).<\/p>\n

         <\/p>\n

        HTTP\/2<\/strong>\u4e2d\u7684\u591a\u8def\u590d\u7528\u662f\u600e\u4e48\u56de\u4e8b\uff1f<\/strong><\/p>\n

        HTTP\/2\u4f7f\u7528\u591a\u8def\u590d\u7528\uff0c\u591a\u4e2a\u8bf7\u6c42\u548c\u56de\u590d\u5168\u5f02\u6b65\u7684\u901a\u8fc7\u540c\u4e00\u4e2aTCP\u8fde\u63a5\u6536\u53d1\u3002<\/p>\n

        HTTP\/2\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u7684\u534f\u8bae\u3002\u6bcf\u4e00\u4e2a\u8bf7\u6c42\u548c\u56de\u590d\u90fd\u88ab\u5206\u914d\u4e86\u4e00\u4e2a\u6d41\u6807\u5fd7(Stream ID)\uff0c\u800c\u4e14\u8bf7\u6c42\u548c\u56de\u590d\u88ab\u5207\u6210\u4e86\u5f88\u591a\u5e27(Frame)\uff0c\u5c5e\u4e8e\u540c\u4e00\u4e2a\u8bf7\u6c42\u6216\u56de\u590d\u5e27\u7684Stream ID\u76f8\u540c\u3002\u56e0\u4e3a\u6709\u4e86\u8fd9\u4e2aStream ID\u548cFrame\u7684\u673a\u5236\uff0c\u8bf7\u6c42\u548c\u56de\u590d\u53ef\u4ee5\u5728\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7a0b\u5e8f\u4e24\u7aef\u540c\u65f6\u5168\u5f02\u6b65\u7684\u53d1\u9001\u3002\u56e0\u6b64\uff0cHTTP2\u6ca1\u6709\u4e86Head-of-line Blocking\u7684\u95ee\u9898\u3002<\/p>\n

        \u6bcf\u4e00\u4e2aStream\u8fd8\u53ef\u4ee5\u88ab\u8d4b\u4e8e\u4e00\u4e2a\u4f18\u5148\u7ea7\uff0c\u670d\u52a1\u5668\u53ef\u4ee5\u5206\u914d\u66f4\u591a\u7684\u7cfb\u7edf\u8d44\u6e90\u5904\u7406\u9ad8\u4f18\u7ea7\u7684Stream\u3002<\/p>\n

        HTTP\/2\u8fd8\u6709\u4e00\u4e2a\u4f20\u8f93\u5c42\u7ea7\u522b\u7684\u6d41\u63a7\u3002\u5b83\u534f\u5546\u4e86\u5ba2\u6237\u7a0b\u5e8f\u548c\u670d\u52a1\u5668\u4e24\u7aef\u6700\u591a\u4f7f\u7528\u591a\u5c11\u4e2aStream,\u670d\u52a1\u5668\u80fd\u5904\u7406\u7684\u6700\u5927\u5c3a\u5bf8\u7684Stream\u4ee5\u53ca\u6574\u4e2a\u8fde\u63a5\u6700\u591a\u5904\u7406\u591a\u5c11\u5b57\u8282\uff0c\u4ee5\u53ca\u6570\u636e\u88ab\u53d1\u9001\u7684\u901f\u7387\u3002<\/p>\n

         <\/p>\n

        HTTP\/2\u4e2d\u7684\u670d\u52a1\u5668\u63a8\u9001(Server Push)\u548c\u627f\u8bfa(Promise)<\/p>\n

        \u5f53\u670d\u52a1\u5668“\u611f\u89c9”\u5230\u5ba2\u6237\u7a0b\u5e8f\u9700\u8981\u66f4\u591a\u7684\u8d44\u6e90\u65f6\uff0c\u5c31\u4f1a\u7ed9\u5ba2\u6237\u7a0b\u5e8f\u53d1\u9001\u4e00\u4e2aPromise Stream \uff0c\u63d0\u9192\u5ba2\u6237\u7a0b\u5e8f\u9700\u8981\u4ec0\u4e48\u8d44\u6e90\u3002\u8fd9\u4e9bstream\u6bd4\u4e00\u822c\u7684stream\u7684\u4f18\u5148\u7ea7\u8981\u9ad8\u3002<\/p>\n

        \u8fd9\u9879\u6280\u672f\u5728\u52a0\u8f7d\u7f51\u9875\u65f6\u975e\u5e38\u7528\u6237\uff0c\u56e0\u4e3a\u7f51\u9875\u7684\u5927\u91cfcss\u548cjavascrpit\u53ef\u80fd\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u53d1\u9001\u3002\u800cHTTP\/1\u7684\u4f5c\u6cd5\u662f\u628acss\u548cjs\u90fdcombine\u5230\u4e00\u8d77\u3002<\/p>\n

        \u670d\u52a1\u5668\u53d1\u9001Promise Stream\u65f6\u63d0\u9192\u7684\u8d44\u6e90\u9075\u5b88\u540c\u6e90\u7b56\u7565(same origin policy)<\/p>\n

        HTTP\/2<\/strong>\u4e2d\u7684\u5934\u90e8\u538b\u7f29\uff1a<\/strong><\/p>\n

        HTTP\/2\u7684\u5934\u90e8\u538b\u7f29\u548cHTTP\/1.1\u4e2d\u65e9\u6709\u7684\u7528gzip\u538b\u7f29Body\u4e0d\u4e00\u6837\u3002\u4f7f\u7528HTTP\/2\u65f6\uff0c\u5728\u5ba2\u6237\u7a0b\u5e8f\u548c\u670d\u52a1\u5668\u4e24\u7aef\uff0c\u90fd\u4f1a\u4fdd\u5b58\u4e00\u5f20\u8868\uff0c\u8bb0\u5f55\u4e86\u6536\u5230\u8fc7\u7684\u5934\u90e8\u3002\u5b83\u4eec\u5728\u53d1\u9001HTTP\u65f6\u4e0d\u4f1a\u91cd\u590d\u53d1\u9001\u4e00\u6837\u7684\u5934\u90e8\uff0c\u5f53\u518d\u6b21\u53d1\u9001\u76f8\u540c\u7684\u5934\u90e8\u65f6\uff0c\u53ea\u4f1a\u53d1\u9001\u8be5\u5934\u90e8\u5bf9\u5e94\u7684\u8868\u7684\u7d22\u5f15\u53f7\u3002<\/p>\n

        copyright ykyi.net<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

        \u8bd1\u81ea\uff1ahttp:\/\/qnimate.com\/post-series\/http2-complete-tutorial\/ HTTP1.1\u662f\u57281999\u5e74\u7684\u65f6\u5019\u88ab\u5f15\u5165\u4e1a\u754c\u7684\u3002\u4ece\u5f53\u65f6\u5230\u73b0\u5728\uff0cWEB\u5df2\u7ecf\u53d1\u751f\u4e86\u76f8\u5f53\u5927\u7684\u53d8\u5316\u3002\u5f88\u591a\u4eba\u5f00\u59cb\u7528\u79fb\u52a8\u8bbe\u5907\u4e0a\u7f51\uff0c\u6709\u4e9b\u79fb\u52a8\u73af\u5883\u4e0b\u7f51\u7edc\u8d28\u91cf\u975e\u5e38\u4e0d\u7a33\u5b9a\u3002\u53e6\u5916\uff0cWEB\u9875\u9762\u7684\u5185\u5bb9\u4e5f\u76f8\u5f53\u7684\u4e30\u5bcc\u4e86\u3002\u8fd9\u4e9b\u90fd\u8d1f\u9762\u5f71\u54cd\u4e86WEB\u9875\u9762\u7684\u52a0\u8f7d\u65f6\u95f4\u3002\u56e0\u6b64\uff0c\u9700\u8981\u4e00\u4e2a\u65b0\u7684\u534f\u8bae\u6765\u52a0\u901fWEB\u7684\u52a0\u8f7d\u3002   HTTP\/2\u548cSPDY\u7684\u533a\u522b\uff1a SPDY\u662f\u8c37\u6b4c\u4e8e2009\u5e74\u521b\u9020\u7684\u534f\u8bae\uff0c\u65e8\u5728WEB\u5ef6\u8fdf\u4ee5\u53ca\u589e\u5f3a\u5b89\u5168\u6027\u3002 HTTP\/2\u662fSPDY\u7684\u4e00\u4e2a\u514b\u9686\u3002\u8c37\u6b4c\u5df2\u7ecf\u505c\u6b62\u4e86\u7ee7\u7eed\u5f00\u53d1SPDY\uff0c\u5e76\u4e14\u628a\u5de5\u4f5c\u8f6c\u79fb\u5230\u4e86HTTP\/2\u4e0a\u6765\u3002   HTTP\/2\u7684\u76ee\u6807\uff1a \u51cf\u5c11\u52a0\u8f7d\u5ef6\u65f6\u3002 \u51cf\u5c11TCP\u8fde\u63a5\u6570\u3002 \u589e\u5f3a\u7684\u7f51\u7edc\u5b89\u5168\u3002 \u4fdd\u6301\u548cHTTP\/1.1\u7684\u517c\u5bb9\u3002   HTTP\/2\u7684\u529f\u80fd\uff1a \u591a\u8def\u590d\u7528Multiplexing\uff1a\u5f88\u591a\u4e2a\u5f02\u6b65\u7684HTTP\u8bf7\u6c42\u53ea\u4f7f\u7528\u4e00\u4e2aTCP\u7684\u8fde\u63a5\u3002 \u670d\u52a1\u7aefPUSH\uff1a\u5bf9\u4e8e\u4e00\u4e2a\u8bf7\u6c42\u53ef\u80fd\u6709\u591a\u4e2a\u56de\u590d\u3002 \u5934\u90e8\u538b\u7f29\uff1a\u538b\u7f29\u5934\u90e8(headers)\u3002 \u8bf7\u6c42\u5206\u7ea7\uff1a\u5bf9\u540c\u4e00\u4e2a\u57df\u540d\u7684\u8bf7\u6c42\u53ef\u4f5c\u4f18\u5148\u7ea7\u5206\u7ea7\u3002 \u4e8c\u8fdb\u5236\u534f\u8bae\uff1aHTTP\/2\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u534f\u8bae\uff0c\u800cHTTP\/1.1\u662f\u4e00\u4e2a\u6587\u672c\u534f\u8bae\u3002   HTTP\/2\u89e3\u51b3\u4e86HTTP\/1.1\u7684\u54ea\u4e9b\u95ee\u9898\uff1a HTTP\u7ba1\u9053(HTTP pipelining)\uff1a\u4e00\u4e9bHTTP1.1\u5ba2\u6237\u7aef\u4f7f\u7528\u4e86HTTP\u7ba1\u9053\u6280\u672f\u6765\u51cf\u5c11TCP\u8fde\u63a5\u6570\u3002HTTP\u7ba1\u9053\u6307\u7684\u662f\u591a\u4e2aHTTP\u8bf7\u6c42\u88ab\u53d1\u5f80\u540c\u4e00\u4e2aTCP\u8fde\u63a5\uff0c\u800c\u4e0d\u7b49\u5f85\u524d\u4e00\u4e2a\u8bf7\u6c42\u7684\u56de\u590d\u3002\u4f46\u662f\u670d\u52a1\u7aef\u53d1\u9001\u56de\u590d\u65f6\u7684\u987a\u5e8f\u548c\u6536\u5230\u7684\u8bf7\u6c42\u7684\u987a\u5e8f\u4e00\u6837\u3002\u56e0\u6b64\uff0c\u9020\u6210\u4e86HOL\u963b\u585e\u95ee\u9898(head-of-line blocking)\u3002HOL Blocking\u7b80\u5355\u5730\u8bf4\u662f\u4e00\u4e2a\u56de\u590d\u7684\u5ef6\u8fdf\u4f1a\u4f7f\u5f97\u6392\u5728\u5b83\u540e\u9762\u7684\u56de\u590d\u90fd\u4f1a\u5ef6\u8fdf\u3002HTTP\/2\u900f\u8fc7\u5f15\u7528\u591a\u8def\u590d\u7528(Multiplexing)\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002\u591a\u4e2aHTTP\u8bf7\u6c42\u548c\u591a\u4e2aHTTP\u56de\u590d\u90fd\u4f7f\u7528\u540c\u4e00\u4e2aTCP\u8fde\u7eed\uff0c\u800c\u4e14HTTP\u56de\u590d\u7684\u987a\u5e8f\u4e0d\u9700\u8981\u4fdd\u6301HTTP\u8bf7\u6c42\u5230\u8fbe\u7684\u987a\u5e8f\u3002 \u540c\u4e00\u4e2a\u57df\u540d\u7684\u591a\u4e2aTCP\u8fde\u63a5\uff1a\u5728\u4f7f\u7528HTTP\/1.1\u65f6\uff0c\u9700\u8981\u5bf9\u540c\u4e00\u4e2a\u57df\u540d\u8d77\u591a\u4e2aTCP\u8fde\u63a5\u6765\u589e\u52a0\u541e\u5410\u91cf\u3002\u800c\u4f7f\u7528HTTP\/2\u65f6\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u57df\u540d\uff0c\u53ea\u5145\u8bb8\u6709\u4e00\u4e2aTCP\u8fde\u63a5\uff08only one TCP connection per domain is allowed\uff09\u3002\u6240\u6709\u7684\u8bf7\u6c42\u548c\u56de\u590d\u90fd\u901a\u8fc7\u552f\u4e00\u7684\u4e00\u4e2aTCP\u8fde\u63a5\u8fdb\u884c\u3002 TCP\u8fde\u63a5\u7684\u5173\u95ed\u65f6\u95f4\uff1a\u4f7f\u7528HTTP1.1\u65f6\uff0c\u4e00\u4e2aTCP\u8fde\u63a5\u5728\u8bf7\u6c42\u5b8c\u6210\u65f6\u7acb\u523b\u88ab\u5173\u95ed\u3002\u4f46\u5bf9\u4e8eHTTP\/2\uff0cTCP\u8fde\u63a5\u80fd\u5b58\u6d3b\u76f8\u5f53\u6210\u5730\u4e00\u6bb5\u65f6\u95f4\u3002 \u5934\u90e8\u538b\u7f29\uff1aHTTP\/1.1\u662f\u6ca1\u6709\u5934\u90e8\u538b\u7f29\u7684\uff0c\u4f46HTTP\/2\u5f15\u5165\u5934\u90e8\u538b\u7f29\u8fdb\u4e00\u6b65\u7684\u51cf\u5c11\u4e86\u5ef6\u65f6\u3002   HTTP\/2\u5982\u4f55\u517c\u5bb9HTT\/1? HTTP\/2\u5ba2\u6237\u7aef\u5728\u4e0d\u786e\u5b9a\u5bf9\u65b9\u670d\u52a1\u5668\u662f\u5426\u652f\u6301HTTP\/2\u65f6\uff0c\u4f1a\u7528HTTP\/1\u534f\u8bae\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u65f6\u5e26\u4e0aUpgrade: HTTP\/2.0\u8fd9\u4e2a\u5934\u90e8\u3002\u5982\u679c\u5bf9\u65b9\u670d\u52a1\u5668\u652f\u6301HTTP\/2\uff0c\u5c31\u4f1a\u56de\u590dHTTP1.1 101\uff0c\u8868\u793a\u5207\u6362\u534f\u8bae(Switching Protocols status)\u3002\u800c\u5bf9\u4e8e\u8001\u65e7\u7684\u670d\u52a1\u5668\u5219\u7b80\u5355\u5730\u8fd4\u56deHTTP\/1.1\u7684\u72b6\u6001\u3002 HTTP\/2\u5ba2\u6237\u7aef\u53ef\u4ee5\u8bb0\u4e0b\u54ea\u4e9b\u670d\u52a1\u5668\u652f\u6301HTTP\/2\uff0c\u8fd9\u6837\uff0c\u4e0b\u6b21\u5c31\u53ef\u4ee5\u76f4\u63a5\u53d1\u8d77HTTP\/2\u8bf7\u6c42\uff0c\u800c\u4e0d\u5fc5\u518d\u7ecf\u8fc7\u4e00\u4e2a\u8be2\u95ee\u548c\u56de\u590d(Upgrade Round Trip).   HTTP\/2\u4e2d\u7684\u591a\u8def\u590d\u7528\u662f\u600e\u4e48\u56de\u4e8b\uff1f HTTP\/2\u4f7f\u7528\u591a\u8def\u590d\u7528\uff0c\u591a\u4e2a\u8bf7\u6c42\u548c\u56de\u590d\u5168\u5f02\u6b65\u7684\u901a\u8fc7\u540c\u4e00\u4e2aTCP\u8fde\u63a5\u6536\u53d1\u3002 HTTP\/2\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u7684\u534f\u8bae\u3002\u6bcf\u4e00\u4e2a\u8bf7\u6c42\u548c\u56de\u590d\u90fd\u88ab\u5206\u914d\u4e86\u4e00\u4e2a\u6d41\u6807\u5fd7(Stream ID)\uff0c\u800c\u4e14\u8bf7\u6c42\u548c\u56de\u590d\u88ab\u5207\u6210\u4e86\u5f88\u591a\u5e27(Frame)\uff0c\u5c5e\u4e8e\u540c\u4e00\u4e2a\u8bf7\u6c42\u6216\u56de\u590d\u5e27\u7684Stream ID\u76f8\u540c\u3002\u56e0\u4e3a\u6709\u4e86\u8fd9\u4e2aStream ID\u548cFrame\u7684\u673a\u5236\uff0c\u8bf7\u6c42\u548c\u56de\u590d\u53ef\u4ee5\u5728\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7a0b\u5e8f\u4e24\u7aef\u540c\u65f6\u5168\u5f02\u6b65\u7684\u53d1\u9001\u3002\u56e0\u6b64\uff0cHTTP2\u6ca1\u6709\u4e86Head-of-line Blocking\u7684\u95ee\u9898\u3002 \u6bcf\u4e00\u4e2aStream\u8fd8\u53ef\u4ee5\u88ab\u8d4b\u4e8e\u4e00\u4e2a\u4f18\u5148\u7ea7\uff0c\u670d\u52a1\u5668\u53ef\u4ee5\u5206\u914d\u66f4\u591a\u7684\u7cfb\u7edf\u8d44\u6e90\u5904\u7406\u9ad8\u4f18\u7ea7\u7684Stream\u3002 HTTP\/2\u8fd8\u6709\u4e00\u4e2a\u4f20\u8f93\u5c42\u7ea7\u522b\u7684\u6d41\u63a7\u3002\u5b83\u534f\u5546\u4e86\u5ba2\u6237\u7a0b\u5e8f\u548c\u670d\u52a1\u5668\u4e24\u7aef\u6700\u591a\u4f7f\u7528\u591a\u5c11\u4e2aStream,\u670d\u52a1\u5668\u80fd\u5904\u7406\u7684\u6700\u5927\u5c3a\u5bf8\u7684Stream\u4ee5\u53ca\u6574\u4e2a\u8fde\u63a5\u6700\u591a\u5904\u7406\u591a\u5c11\u5b57\u8282\uff0c\u4ee5\u53ca\u6570\u636e\u88ab\u53d1\u9001\u7684\u901f\u7387\u3002 … Continue reading “HTTP2\u7b80\u5355\u6559\u7a0b”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,6],"tags":[39],"class_list":["post-1282","post","type-post","status-publish","format-standard","hentry","category-network","category-tech_articles","tag-http"],"_links":{"self":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/1282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1282"}],"version-history":[{"count":0,"href":"https:\/\/ykyi.net\/index.php?rest_route=\/wp\/v2\/posts\/1282\/revisions"}],"wp:attachment":[{"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ykyi.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}