\u4e3a\u4ec0\u4e48\u8981\u538b\u7f29<\/strong><\/div>\n
\u5728 HTTP\/1 \u4e2d\uff0cHTTP \u8bf7\u6c42\u548c\u54cd\u5e94\u90fd\u662f\u7531\u300c\u72b6\u6001\u884c\u3001\u8bf7\u6c42 \/ \u54cd\u5e94\u5934\u90e8\u3001\u6d88\u606f\u4e3b\u4f53\u300d\u4e09\u90e8\u5206\u7ec4\u6210\u3002\u4e00\u822c\u800c\u8a00\uff0c\u6d88\u606f\u4e3b\u4f53\u90fd\u4f1a\u7ecf\u8fc7 gzip \u538b\u7f29\uff0c\u6216\u8005\u672c\u8eab\u4f20\u8f93\u7684\u5c31\u662f\u538b\u7f29\u8fc7\u540e\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u4f8b\u5982\u56fe\u7247\u3001\u97f3\u9891\uff09\uff0c\u4f46\u72b6\u6001\u884c\u548c\u5934\u90e8\u5374\u6ca1\u6709\u7ecf\u8fc7\u4efb\u4f55\u538b\u7f29\uff0c\u76f4\u63a5\u4ee5\u7eaf\u6587\u672c\u4f20\u8f93\u3002\u968f\u7740 Web \u529f\u80fd\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u6bcf\u4e2a\u9875\u9762\u4ea7\u751f\u7684\u8bf7\u6c42\u6570\u4e5f\u8d8a\u6765\u8d8a\u591a\uff0c\u6839\u636e HTTP Archive \u7684\u7edf\u8ba1\uff0c\u5f53\u524d\u5e73\u5747\u6bcf\u4e2a\u9875\u9762\u90fd\u4f1a\u4ea7\u751f\u4e0a\u767e\u4e2a\u8bf7\u6c42\u3002\u8d8a\u6765\u8d8a\u591a\u7684\u8bf7\u6c42\u5bfc\u81f4\u6d88\u8017\u5728\u5934\u90e8\u7684\u6d41\u91cf\u8d8a\u6765\u8d8a\u591a\uff0c\u5c24\u5176\u662f\u6bcf\u6b21\u90fd\u8981\u4f20\u8f93 UserAgent\u3001Cookie \u8fd9\u7c7b\u4e0d\u4f1a\u9891\u7e41\u53d8\u52a8\u7684\u5185\u5bb9\uff0c\u5b8c\u5168\u662f\u4e00\u79cd\u6d6a\u8d39\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u6211\u968f\u624b\u6253\u5f00\u7684\u4e00\u4e2a\u9875\u9762\u7684\u6293\u5305\u7ed3\u679c\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u4f20\u8f93\u5934\u90e8\u7684\u7f51\u7edc\u5f00\u9500\u8d85\u8fc7 100kb\uff0c\u6bd4 HTML \u8fd8\u591a\uff1a<\/p>\n
$\"linux_web_http2_02\"$ <\/p>\n
\u4e0b\u9762\u662f\u5176\u4e2d\u4e00\u4e2a\u8bf7\u6c42\u7684\u660e\u7ec6\u3002\u53ef\u4ee5\u770b\u5230\uff0c\u4e3a\u4e86\u83b7\u5f97 58 \u5b57\u8282\u7684\u6570\u636e\uff0c\u5728\u5934\u90e8\u4f20\u8f93\u4e0a\u82b1\u8d39\u4e86\u597d\u51e0\u500d\u7684\u6d41\u91cf\uff1a<\/p>\n
$\"linux_web_http2_03\"$ <\/p>\n
HTTP\/1 \u65f6\u4ee3\uff0c\u4e3a\u4e86\u51cf\u5c11\u5934\u90e8\u6d88\u8017\u7684\u6d41\u91cf\uff0c\u6709\u5f88\u591a\u4f18\u5316\u65b9\u6848\u53ef\u4ee5\u5c1d\u8bd5\uff0c\u4f8b\u5982\u5408\u5e76\u8bf7\u6c42\u3001\u542f\u7528 Cookie-Free \u57df\u540d\u7b49\u7b49\uff0c\u4f46\u662f\u8fd9\u4e9b\u65b9\u6848\u6216\u591a\u6216\u5c11\u4f1a\u5f15\u5165\u4e00\u4e9b\u65b0\u7684\u95ee\u9898\uff0c\u8fd9\u91cc\u4e0d\u5c55\u5f00\u8ba8\u8bba\u3002<\/p>\n
\u538b\u7f29\u540e\u7684\u6548\u679c<\/strong><\/div>\n
\u9996\u5148\u76f4\u63a5\u4e0a\u56fe\u3002\u4e0b\u56fe\u9009\u4e2d\u7684 Stream \u662f\u9996\u6b21\u8bbf\u95ee\u672c\u7ad9\uff0c\u6d4f\u89c8\u5668\u53d1\u51fa\u7684\u8bf7\u6c42\u5934\uff1a<\/p>\n
$\"linux_web_http2_04\"$ <\/p>\n
\u4ece\u56fe\u7247\u4e2d\u53ef\u4ee5\u770b\u5230\u8fd9\u4e2a HEADERS \u6d41\u7684\u957f\u5ea6\u662f 206 \u4e2a\u5b57\u8282\uff0c\u800c\u89e3\u7801\u540e\u7684\u5934\u90e8\u957f\u5ea6\u6709 451 \u4e2a\u5b57\u8282\u3002\u7531\u6b64\u53ef\u89c1\uff0c\u538b\u7f29\u540e\u7684\u5934\u90e8\u5927\u5c0f\u51cf\u5c11\u4e86\u4e00\u534a\u591a\u3002<\/p>\n
\u7136\u800c\u8fd9\u5c31\u662f\u5168\u90e8\u5417\uff1f\u518d\u4e0a\u4e00\u5f20\u56fe\u3002\u4e0b\u56fe\u9009\u4e2d\u7684 Stream \u662f\u70b9\u51fb\u672c\u7ad9\u94fe\u63a5\u540e\uff0c\u6d4f\u89c8\u5668\u53d1\u51fa\u7684\u8bf7\u6c42\u5934\uff1a<\/p>\n
$\"linux_web_http2_05\"$ <\/p>\n
\u53ef\u4ee5\u770b\u5230\u8fd9\u4e00\u6b21\uff0cHEADERS \u6d41\u7684\u957f\u5ea6\u53ea\u6709 49 \u4e2a\u5b57\u8282\uff0c\u4f46\u662f\u89e3\u7801\u540e\u7684\u5934\u90e8\u957f\u5ea6\u5374\u6709 470 \u4e2a\u5b57\u8282\u3002\u8fd9\u4e00\u6b21\uff0c\u538b\u7f29\u540e\u7684\u5934\u90e8\u5927\u5c0f\u51e0\u4e4e\u53ea\u6709\u539f\u59cb\u5927\u5c0f\u7684 1\/10\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u524d\u540e\u4e24\u6b21\u5dee\u8ddd\u8fd9\u4e48\u5927\u5462\uff1f\u6211\u4eec\u628a\u4e24\u6b21\u7684\u5934\u90e8\u4fe1\u606f\u5c55\u5f00\uff0c\u67e5\u770b\u540c\u4e00\u4e2a\u5b57\u6bb5\u4e24\u6b21\u4f20\u8f93\u6240\u5360\u7528\u7684\u5b57\u8282\u6570\uff1a<\/p>\n
$\"linux_web_http2_06\"$ <\/p>\n
$\"linux_web_http2_07\"$
\n\u5bf9\u6bd4\u540e\u53ef\u4ee5\u53d1\u73b0\uff0c\u7b2c\u4e8c\u6b21\u7684\u8bf7\u6c42\u5934\u90e8\u4e4b\u6240\u4ee5\u975e\u5e38\u5c0f\uff0c\u662f\u56e0\u4e3a\u5927\u90e8\u5206\u952e\u503c\u5bf9\u53ea\u5360\u7528\u4e86\u4e00\u4e2a\u5b57\u8282\u3002\u5c24\u5176\u662f UserAgent\u3001Cookie \u8fd9\u6837\u7684\u5934\u90e8\uff0c\u9996\u6b21\u8bf7\u6c42\u4e2d\u9700\u8981\u5360\u7528\u5f88\u591a\u5b57\u8282\uff0c\u540e\u7eed\u8bf7\u6c42\u4e2d\u90fd\u53ea\u9700\u8981\u4e00\u4e2a\u5b57\u8282\u3002<\/p>\n
\u6280\u672f\u539f\u7406<\/strong><\/div>\n
\u4e0b\u9762\u8fd9\u5f20\u622a\u56fe\uff0c\u53d6\u81ea Google \u7684\u6027\u80fd\u4e13\u5bb6 Ilya Grigorik \u5728 Velocity 2015 \u2022 SC \u4f1a\u8bae\u4e2d\u5206\u4eab\u7684\u300cHTTP\/2 is here, let's optimize!\u300d\uff0c\u975e\u5e38\u76f4\u89c2\u5730\u63cf\u8ff0\u4e86 HTTP\/2 \u4e2d\u5934\u90e8\u538b\u7f29\u7684\u539f\u7406\uff1a<\/p>\n
$\"linux_web_http2_08\"$ <\/p>\n
\u6211\u518d\u7528\u901a\u4fd7\u7684\u8bed\u8a00\u89e3\u91ca\u4e0b\uff0c\u5934\u90e8\u538b\u7f29\u9700\u8981\u5728\u652f\u6301 HTTP\/2 \u7684\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u7aef\u4e4b\u95f4\uff1a\u7ef4\u62a4\u4e00\u4efd\u76f8\u540c\u7684\u9759\u6001\u5b57\u5178\uff08Static Table\uff09\uff0c\u5305\u542b\u5e38\u89c1\u7684\u5934\u90e8\u540d\u79f0\uff0c\u4ee5\u53ca\u7279\u522b\u5e38\u89c1\u7684\u5934\u90e8\u540d\u79f0\u4e0e\u503c\u7684\u7ec4\u5408\uff1b<\/p>\n
\n
\u7ef4\u62a4\u4e00\u4efd\u76f8\u540c\u7684\u9759\u6001\u5b57\u5178\uff08Static Table\uff09\uff0c\u5305\u542b\u5e38\u89c1\u7684\u5934\u90e8\u540d\u79f0\uff0c\u4ee5\u53ca\u7279\u522b\u5e38\u89c1\u7684\u5934\u90e8\u540d\u79f0\u4e0e\u503c\u7684\u7ec4\u5408<\/li>\n
\u7ef4\u62a4\u4e00\u4efd\u76f8\u540c\u7684\u52a8\u6001\u5b57\u5178\uff08Dynamic Table\uff09\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u5185\u5bb9<\/li>\n
\u652f\u6301\u57fa\u4e8e\u9759\u6001\u54c8\u592b\u66fc\u7801\u8868\u7684\u54c8\u592b\u66fc\u7f16\u7801\uff08Huffman Coding\uff09<\/li>\n<\/ul>\n
\u9759\u6001\u5b57\u5178\u7684\u4f5c\u7528\u6709\u4e24\u4e2a\uff1a1\uff09\u5bf9\u4e8e\u5b8c\u5168\u5339\u914d\u7684\u5934\u90e8\u952e\u503c\u5bf9\uff0c\u4f8b\u5982 :method: GET\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u4e00\u4e2a\u5b57\u7b26\u8868\u793a\uff1b2\uff09\u5bf9\u4e8e\u5934\u90e8\u540d\u79f0\u53ef\u4ee5\u5339\u914d\u7684\u952e\u503c\u5bf9\uff0c\u4f8b\u5982 cookie: xxxxxxx\uff0c\u53ef\u4ee5\u5c06\u540d\u79f0\u4f7f\u7528\u4e00\u4e2a\u5b57\u7b26\u8868\u793a\u3002HTTP\/2 \u4e2d\u7684\u9759\u6001\u5b57\u5178\u5982\u4e0b<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Index<\/th>\n \u00a0 \u00a0Header Name<\/th>\n Header Value<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\n \u00a0 \u00a0 :authority<\/td>\n <\/td>\n<\/tr>\n
2<\/td>\n \u00a0 \u00a0 :method<\/td>\n GET<\/td>\n<\/tr>\n
3<\/td>\n \u00a0 \u00a0 :method<\/td>\n POST<\/td>\n<\/tr>\n
4<\/td>\n \u00a0 \u00a0 :path<\/td>\n \/<\/td>\n<\/tr>\n
5<\/td>\n \u00a0 \u00a0 :path<\/td>\n \/index.html<\/td>\n<\/tr>\n
6<\/td>\n \u00a0 \u00a0 :scheme<\/td>\n http<\/td>\n<\/tr>\n
7<\/td>\n \u00a0 \u00a0 :scheme<\/td>\n https<\/td>\n<\/tr>\n
8<\/td>\n \u00a0 \u00a0 :status<\/td>\n 200<\/td>\n<\/tr>\n
...<\/td>\n \u00a0 \u00a0 ...<\/td>\n ...<\/td>\n<\/tr>\n
32<\/td>\n \u00a0 \u00a0 cookie<\/td>\n <\/td>\n<\/tr>\n
...<\/td>\n \u00a0 \u00a0 ...<\/td>\n ...<\/td>\n<\/tr>\n
60<\/td>\n \u00a0 \u00a0 via<\/td>\n <\/td>\n<\/tr>\n
61<\/td>\n \u00a0 \u00a0 www-authenticate<\/td>\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u540c\u65f6\uff0c\u6d4f\u89c8\u5668\u53ef\u4ee5\u544a\u77e5\u670d\u52a1\u7aef\uff0c\u5c06 cookie: xxxxxxx \u6dfb\u52a0\u5230\u52a8\u6001\u5b57\u5178\u4e2d\uff0c\u8fd9\u6837\u540e\u7eed\u6574\u4e2a\u952e\u503c\u5bf9\u5c31\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5b57\u7b26\u8868\u793a\u4e86\u3002\u7c7b\u4f3c\u7684\uff0c\u670d\u52a1\u7aef\u4e5f\u53ef\u4ee5\u66f4\u65b0\u5bf9\u65b9\u7684\u52a8\u6001\u5b57\u5178\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u52a8\u6001\u5b57\u5178\u4e0a\u4e0b\u6587\u6709\u5173\uff0c\u9700\u8981\u4e3a\u6bcf\u4e2a HTTP\/2 \u8fde\u63a5\u7ef4\u62a4\u4e0d\u540c\u7684\u5b57\u5178,\u4f7f\u7528\u5b57\u5178\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u5347\u538b\u7f29\u6548\u679c\uff0c\u5176\u4e2d\u9759\u6001\u5b57\u5178\u5728\u9996\u6b21\u8bf7\u6c42\u4e2d\u5c31\u53ef\u4ee5\u4f7f\u7528\u3002\u5bf9\u4e8e\u9759\u6001\u3001\u52a8\u6001\u5b57\u5178\u4e2d\u4e0d\u5b58\u5728\u7684\u5185\u5bb9\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u54c8\u592b\u66fc\u7f16\u7801\u6765\u51cf\u5c0f\u4f53\u79ef\u3002HTTP\/2 \u4f7f\u7528\u4e86\u4e00\u4efd\u9759\u6001\u54c8\u592b\u66fc\u7801\u8868\uff08\u8be6\u89c1\uff09\uff0c\u4e5f\u9700\u8981\u5185\u7f6e\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u7aef\u4e4b\u4e2d\u3002
\n\u8fd9\u91cc\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0cHTTP\/1 \u7684\u72b6\u6001\u884c\u4fe1\u606f\uff08Method\u3001Path\u3001Status \u7b49\uff09\uff0c\u5728 HTTP\/2 \u4e2d\u88ab\u62c6\u6210\u952e\u503c\u5bf9\u653e\u5165\u5934\u90e8\uff08\u5192\u53f7\u5f00\u5934\u7684\u90a3\u4e9b\uff09\uff0c\u540c\u6837\u53ef\u4ee5\u4eab\u53d7\u5230\u5b57\u5178\u548c\u54c8\u592b\u66fc\u538b\u7f29\u3002\u53e6\u5916\uff0cHTTP\/2 \u4e2d\u6240\u6709\u5934\u90e8\u540d\u79f0\u5fc5\u987b\u5c0f\u5199\u3002<\/p>\n
\u5b9e\u73b0\u7ec6\u8282<\/p>\n
\u4e86\u89e3\u4e86 HTTP\/2 \u5934\u90e8\u538b\u7f29\u7684\u57fa\u672c\u539f\u7406\uff0c\u6700\u540e\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5177\u4f53\u7684\u5b9e\u73b0\u7ec6\u8282\u3002HTTP\/2 \u7684\u5934\u90e8\u952e\u503c\u5bf9\u6709\u4ee5\u4e0b\u8fd9\u4e9b\u60c5\u51b5\uff1a<\/p>\n
1\uff09\u6574\u4e2a\u5934\u90e8\u952e\u503c\u5bf9\u90fd\u5728\u5b57\u5178\u4e2d<\/strong><\/p>\n
0 1 2 3 4 5 6 7\r\n+---+---+---+---+---+---+---+---+\r\n| 1 | Index (7+) |\r\n+---+---------------------------+\r\n<\/pre>\n
\u8fd9\u662f\u6700\u7b80\u5355\u7684\u60c5\u51b5\uff0c\u4f7f\u7528\u4e00\u4e2a\u5b57\u8282\u5c31\u53ef\u4ee5\u8868\u793a\u8fd9\u4e2a\u5934\u90e8\u4e86\uff0c\u6700\u5de6\u4e00\u4f4d\u56fa\u5b9a\u4e3a 1\uff0c\u4e4b\u540e\u4e03\u4f4d\u5b58\u653e\u952e\u503c\u5bf9\u5728\u9759\u6001\u6216\u52a8\u6001\u5b57\u5178\u4e2d\u7684\u7d22\u5f15\u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\uff0c\u5934\u90e8\u7d22\u5f15\u503c\u4e3a 2\uff080000010\uff09\uff0c\u5728\u9759\u6001\u5b57\u5178\u4e2d\u67e5\u8be2\u53ef\u5f97 :method: GET\u3002<\/p>\n
$\"linux_web_http2_09\"$ <\/p>\n
2\uff09\u5934\u90e8\u540d\u79f0\u5728\u5b57\u5178\u4e2d\uff0c\u66f4\u65b0\u52a8\u6001\u5b57\u5178<\/strong><\/p>\n
0 1 2 3 4 5 6 7\r\n+---+---+---+---+---+---+---+---+\r\n| 0 | 1 | Index (6+) |\r\n+---+---+-----------------------+\r\n| H | Value Length (7+) |\r\n+---+---------------------------+\r\n| Value String (Length octets) |\r\n+-------------------------------+\r\n<\/pre>\n
\u5bf9\u4e8e\u8fd9\u79cd\u60c5\u51b5\uff0c\u9996\u5148\u9700\u8981\u4f7f\u7528\u4e00\u4e2a\u5b57\u8282\u8868\u793a\u5934\u90e8\u540d\u79f0\uff1a\u5de6\u4e24\u4f4d\u56fa\u5b9a\u4e3a 01\uff0c\u4e4b\u540e\u516d\u4f4d\u5b58\u653e\u5934\u90e8\u540d\u79f0\u5728\u9759\u6001\u6216\u52a8\u6001\u5b57\u5178\u4e2d\u7684\u7d22\u5f15\u3002\u63a5\u4e0b\u6765\u7684\u4e00\u4e2a\u5b57\u8282\u7b2c\u4e00\u4f4d H \u8868\u793a\u5934\u90e8\u503c\u662f\u5426\u4f7f\u7528\u4e86\u54c8\u592b\u66fc\u7f16\u7801\uff0c\u5269\u4f59\u4e03\u4f4d\u8868\u793a\u5934\u90e8\u503c\u7684\u957f\u5ea6 L\uff0c\u540e\u7eed L \u4e2a\u5b57\u8282\u5c31\u662f\u5934\u90e8\u503c\u7684\u5177\u4f53\u5185\u5bb9\u4e86\u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\u7d22\u5f15\u503c\u4e3a 32\uff08100000\uff09\uff0c\u5728\u9759\u6001\u5b57\u5178\u4e2d\u67e5\u8be2\u53ef\u5f97 cookie\uff1b\u5934\u90e8\u503c\u4f7f\u7528\u4e86\u54c8\u592b\u66fc\u7f16\u7801\uff081\uff09\uff0c\u957f\u5ea6\u662f 28\uff080011100\uff09\uff1b\u63a5\u4e0b\u6765\u7684 28 \u4e2a\u5b57\u8282\u662f cookie \u7684\u503c\uff0c\u5c06\u5176\u8fdb\u884c\u54c8\u592b\u66fc\u89e3\u7801\u5c31\u80fd\u5f97\u5230\u5177\u4f53\u5185\u5bb9\u3002<\/p>\n
$\"linux_web_http2_10\"$ <\/p>\n
\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u7aef\u770b\u5230\u8fd9\u79cd\u683c\u5f0f\u7684\u5934\u90e8\u952e\u503c\u5bf9\uff0c\u4f1a\u5c06\u5176\u6dfb\u52a0\u5230\u81ea\u5df1\u7684\u52a8\u6001\u5b57\u5178\u4e2d\u3002\u540e\u7eed\u4f20\u8f93\u8fd9\u6837\u7684\u5185\u5bb9\uff0c\u5c31\u7b26\u5408\u7b2c 1 \u79cd\u60c5\u51b5\u4e86\u3002<\/p>\n
3\uff09\u5934\u90e8\u540d\u79f0\u4e0d\u5728\u5b57\u5178\u4e2d\uff0c\u66f4\u65b0\u52a8\u6001\u5b57\u5178<\/strong><\/p>\n
0 1 2 3 4 5 6 7\r\n+---+---+---+---+---+---+---+---+\r\n| 0 | 1 | 0 |\r\n+---+---+-----------------------+\r\n| H | Name Length (7+) |\r\n+---+---------------------------+\r\n| Name String (Length octets) |\r\n+---+---------------------------+\r\n| H | Value Length (7+) |\r\n+---+---------------------------+\r\n| Value String (Length octets) |\r\n+-------------------------------+\r\n<\/pre>\n
\u8fd9\u79cd\u60c5\u51b5\u4e0e\u7b2c 2 \u79cd\u60c5\u51b5\u7c7b\u4f3c\uff0c\u53ea\u662f\u7531\u4e8e\u5934\u90e8\u540d\u79f0\u4e0d\u5728\u5b57\u5178\u4e2d\uff0c\u6240\u4ee5\u7b2c\u4e00\u4e2a\u5b57\u8282\u56fa\u5b9a\u4e3a 01000000\uff1b\u63a5\u7740\u7533\u660e\u540d\u79f0\u662f\u5426\u4f7f\u7528\u54c8\u592b\u66fc\u7f16\u7801\u53ca\u957f\u5ea6\uff0c\u5e76\u653e\u4e0a\u540d\u79f0\u7684\u5177\u4f53\u5185\u5bb9\uff1b\u518d\u7533\u660e\u503c\u662f\u5426\u4f7f\u7528\u54c8\u592b\u66fc\u7f16\u7801\u53ca\u957f\u5ea6\uff0c\u6700\u540e\u653e\u4e0a\u503c\u7684\u5177\u4f53\u5185\u5bb9\u3002\u4f8b\u5982\u4e0b\u56fe\u4e2d\u540d\u79f0\u7684\u957f\u5ea6\u662f 5\uff080000101\uff09\uff0c\u503c\u7684\u957f\u5ea6\u662f 6\uff080000110\uff09\u3002\u5bf9\u5176\u5177\u4f53\u5185\u5bb9\u8fdb\u884c\u54c8\u592b\u66fc\u89e3\u7801\u540e\uff0c\u53ef\u5f97 pragma: no-cache<\/span>\u3002<\/p>\n
$\"linux_web_http2_11\"$ <\/p>\n
\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u7aef\u770b\u5230\u8fd9\u79cd\u683c\u5f0f\u7684\u5934\u90e8\u952e\u503c\u5bf9\uff0c\u4f1a\u5c06\u5176\u6dfb\u52a0\u5230\u81ea\u5df1\u7684\u52a8\u6001\u5b57\u5178\u4e2d\u3002\u540e\u7eed\u4f20\u8f93\u8fd9\u6837\u7684\u5185\u5bb9\uff0c\u5c31\u7b26\u5408\u7b2c 1 \u79cd\u60c5\u51b5\u4e86\u3002<\/p>\n
4\uff09\u5934\u90e8\u540d\u79f0\u5728\u5b57\u5178\u4e2d\uff0c\u4e0d\u5141\u8bb8\u66f4\u65b0\u52a8\u6001\u5b57\u5178<\/strong><\/p>\n
0 1 2 3 4 5 6 7\r\n+---+---+---+---+---+---+---+---+\r\n| 0 | 0 | 0 | 1 | Index (4+) |\r\n+---+---+-----------------------+\r\n| H | Value Length (7+) |\r\n+---+---------------------------+\r\n| Value String (Length octets) |\r\n+-------------------------------+\r\n<\/pre>\n
\u8fd9\u79cd\u60c5\u51b5\u4e0e\u7b2c 2 \u79cd\u60c5\u51b5\u975e\u5e38\u7c7b\u4f3c\uff0c\u552f\u4e00\u4e0d\u540c\u4e4b\u5904\u662f\uff1a\u7b2c\u4e00\u4e2a\u5b57\u8282\u5de6\u56db\u4f4d\u56fa\u5b9a\u4e3a 0001\uff0c\u53ea\u5269\u4e0b\u56db\u4f4d\u6765\u5b58\u653e\u7d22\u5f15\u4e86\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n
$\"linux_web_http2_12\"$ <\/p>\n
\u8fd9\u91cc\u9700\u8981\u4ecb\u7ecd\u53e6\u5916\u4e00\u4e2a\u77e5\u8bc6\u70b9\uff1a\u5bf9\u6574\u6570\u7684\u89e3\u7801\u3002\u4e0a\u56fe\u4e2d\u7b2c\u4e00\u4e2a\u5b57\u8282\u4e3a 00011111\uff0c\u5e76\u4e0d\u4ee3\u8868\u5934\u90e8\u540d\u79f0\u7684\u7d22\u5f15\u4e3a 15\uff081111\uff09\u3002\u7b2c\u4e00\u4e2a\u5b57\u8282\u53bb\u6389\u56fa\u5b9a\u7684 0001\uff0c\u53ea\u5269\u56db\u4f4d\u53ef\u7528\uff0c\u5c06\u4f4d\u6570\u7528 N \u8868\u793a\uff0c\u5b83\u53ea\u80fd\u7528\u6765\u8868\u793a\u5c0f\u4e8e\u300c2 ^ N - 1 = 15\u300d\u7684\u6574\u6570 I\u3002\u5bf9\u4e8e I\uff0c\u9700\u8981\u6309\u7167\u4ee5\u4e0b\u89c4\u5219\u6c42\u503c\uff08RFC 7541 \u4e2d\u7684\u4f2a\u4ee3\u7801\uff0cvia<\/a>\uff09\uff1a<\/p>\n
if<\/span> I < 2<\/span> ^ N - 1<\/span>, return<\/span> I # I \u5c0f\u4e8e 2 ^ N - 1 \u65f6\uff0c\u76f4\u63a5\u8fd4\u56de<\/span>\r\nelse<\/span>\r\n M = 0<\/span>\r\n repeat\r\n B = next octet # \u8ba9 B \u7b49\u4e8e\u4e0b\u4e00\u4e2a\u516b\u4f4d<\/span>\r\n I = I + (B & 127<\/span>) * 2<\/span> ^ M # I = I + (B \u4f4e\u4e03\u4f4d * 2 ^ M)<\/span>\r\n M = M + 7<\/span>\r\n while<\/span> B & 128<\/span> == 128<\/span> # B \u6700\u9ad8\u4f4d = 1 \u65f6\u7ee7\u7eed\uff0c\u5426\u5219\u8fd4\u56de I<\/span>\r\n return<\/span> I\r\n<\/pre>\n
\u5bf9\u4e8e\u4e0a\u56fe\u4e2d\u7684\u6570\u636e\uff0c\u6309\u7167\u8fd9\u4e2a\u89c4\u5219\u7b97\u51fa\u7d22\u5f15\u503c\u4e3a 32\uff0800011111 00010001\uff0c15 + 17\uff09\uff0c\u4ee3\u8868 cookie<\/span>\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u534f\u8bae\u4e2d\u6240\u6709\u5199\u6210\uff08N+\uff09\u7684\u6570\u5b57\uff0c\u4f8b\u5982 Index (4+)\u3001Name Length (7+)\uff0c\u90fd\u9700\u8981\u6309\u7167\u8fd9\u4e2a\u89c4\u5219\u6765\u7f16\u7801\u548c\u89e3\u7801\u3002<\/p>\n
\u8fd9\u79cd\u683c\u5f0f\u7684\u5934\u90e8\u952e\u503c\u5bf9\uff0c\u4e0d\u5141\u8bb8\u88ab\u6dfb\u52a0\u5230\u52a8\u6001\u5b57\u5178\u4e2d\uff08\u4f46\u53ef\u4ee5\u4f7f\u7528\u54c8\u592b\u66fc\u7f16\u7801\uff09\u3002\u5bf9\u4e8e\u4e00\u4e9b\u975e\u5e38\u654f\u611f\u7684\u5934\u90e8\uff0c\u6bd4\u5982\u7528\u6765\u8ba4\u8bc1\u7684 Cookie\uff0c\u8fd9\u4e48\u505a\u53ef\u4ee5\u63d0\u9ad8\u5b89\u5168\u6027\u3002<\/p>\n
5\uff09\u5934\u90e8\u540d\u79f0\u4e0d\u5728\u5b57\u5178\u4e2d\uff0c\u4e0d\u5141\u8bb8\u66f4\u65b0\u52a8\u6001\u5b57\u5178<\/strong><\/p>\n
0 1 2 3 4 5 6 7\r\n+---+---+---+---+---+---+---+---+\r\n| 0 | 0 | 0 | 1 | 0 |\r\n+---+---+-----------------------+\r\n| H | Name Length (7+) |\r\n+---+---------------------------+\r\n| Name String (Length octets) |\r\n+---+---------------------------+\r\n| H | Value Length (7+) |\r\n+---+---------------------------+\r\n| Value String (Length octets) |\r\n+-------------------------------+\r\n<\/pre>\n
\u8fd9\u79cd\u60c5\u51b5\u4e0e\u7b2c 3 \u79cd\u60c5\u51b5\u975e\u5e38\u7c7b\u4f3c\uff0c\u552f\u4e00\u4e0d\u540c\u4e4b\u5904\u662f\uff1a\u7b2c\u4e00\u4e2a\u5b57\u8282\u56fa\u5b9a\u4e3a 00010000\u3002\u8fd9\u79cd\u60c5\u51b5\u6bd4\u8f83\u5c11\u89c1\uff0c\u6ca1\u6709\u622a\u56fe\uff0c\u5404\u4f4d\u53ef\u4ee5\u8111\u8865\u3002\u540c\u6837\uff0c\u8fd9\u79cd\u683c\u5f0f\u7684\u5934\u90e8\u952e\u503c\u5bf9\uff0c\u4e5f\u4e0d\u5141\u8bb8\u88ab\u6dfb\u52a0\u5230\u52a8\u6001\u5b57\u5178\u4e2d\uff0c\u53ea\u80fd\u4f7f\u7528\u54c8\u592b\u66fc\u7f16\u7801\u6765\u51cf\u5c11\u4f53\u79ef\u3002<\/p>\n
\u5b9e\u9645\u4e0a\uff0c\u534f\u8bae\u4e2d\u8fd8\u89c4\u5b9a\u4e86\u4e0e 4\u30015 \u975e\u5e38\u7c7b\u4f3c\u7684\u53e6\u5916\u4e24\u79cd\u683c\u5f0f\uff1a\u5c06 4\u30015 \u683c\u5f0f\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u7b2c\u56db\u4f4d\u7531 1 \u6539\u4e3a 0 \u5373\u53ef\u3002\u5b83\u8868\u793a\u300c\u672c\u6b21\u4e0d\u66f4\u65b0\u52a8\u6001\u8bcd\u5178\u300d\uff0c\u800c 4\u30015 \u8868\u793a\u300c\u7edd\u5bf9\u4e0d\u5141\u8bb8\u66f4\u65b0\u52a8\u6001\u8bcd\u5178\u300d\u3002\u533a\u522b\u4e0d\u662f\u5f88\u5927\uff0c\u8fd9\u91cc\u7565\u8fc7\u3002<\/p>\n
\u660e\u767d\u4e86\u5934\u90e8\u538b\u7f29\u7684\u6280\u672f\u7ec6\u8282\uff0c\u7406\u8bba\u4e0a\u53ef\u4ee5\u5f88\u8f7b\u677e\u5199\u51fa HTTP\/2 \u5934\u90e8\u89e3\u7801\u5de5\u5177\u4e86\u3002\u6211\u6bd4\u8f83\u61d2\uff0c\u76f4\u63a5\u627e\u6765 node-http2 \u4e2d\u7684 compressor.js<\/a> \u9a8c\u8bc1\u4e00\u4e0b\uff1a<\/p>\n
var<\/span> Decompressor = require<\/span>('.\/compressor'<\/span>).Decompressor;\r\n\r\nvar<\/span> testLog = require<\/span>('bunyan'<\/span>).createLogger({name: 'test'<\/span>});\r\nvar<\/span> decompressor = new<\/span> Decompressor(testLog, 'REQUEST'<\/span>);\r\n\r\nvar<\/span> buffer = new<\/span> Buffer('820481634188353daded6ae43d3f877abdd07f66a281b0dae053fad0321aa49d13fda992a49685340c8a6adca7e28102e10fda9677b8d05707f6a62293a9d810020004015309ac2ca7f2c3415c1f53b0497ca589d34d1f43aeba0c41a4c7a98f33a69a3fdf9a68fa1d75d0620d263d4c79a68fbed00177febe58f9fbed00177b518b2d4b70ddf45abefb4005db901f1184ef034eff609cb60725034f48e1561c8469669f081678ae3eb3afba465f7cb234db9f4085aec1cd48ff86a8eb10649cbf'<\/span>, 'hex'<\/span>);\r\n\r\nconsole<\/span>.log(decompressor.decompress(buffer));\r\n\r\ndecompressor._table.forEach(function<\/span>(row, index)<\/span> <\/span>{\r\n console<\/span>.log(index + 1<\/span>, row[0<\/span>], row[1<\/span>]);\r\n});\r\n<\/pre>\n
\u5934\u90e8\u539f\u59cb\u6570\u636e\u6765\u81ea\u4e8e\u672c\u6587\u7b2c\u4e09\u5f20\u622a\u56fe\uff0c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff08\u9759\u6001\u5b57\u5178\u53ea\u622a\u53d6\u4e86\u4e00\u90e8\u5206\uff09\uff1a<\/p>\n
{ ':method'<\/span>: 'GET'<\/span>,\r\n ':path'<\/span>: '\/'<\/span>,\r\n ':authority'<\/span>: 'imququ.com'<\/span>,\r\n ':scheme'<\/span>: 'https'<\/span>,\r\n 'user-agent'<\/span>: 'Mozilla\/5.0 (Macintosh; Intel Mac OS X 10.11; rv:41.0) Gecko\/20100101 Firefox\/41.0'<\/span>,\r\n accept: 'text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8'<\/span>,\r\n 'accept-language'<\/span>: 'en-US,en;q=0.5'<\/span>,\r\n 'accept-encoding'<\/span>: 'gzip, deflate'<\/span>,\r\n cookie: 'v=47; u=6f048d6e-adc4-4910-8e69-797c399ed456'<\/span>,\r\n pragma: 'no-cache'<\/span> }\r\n1<\/span> ':authority'<\/span> ''<\/span>\r\n2<\/span> ':method'<\/span> 'GET'<\/span>\r\n3<\/span> ':method'<\/span> 'POST'<\/span>\r\n4<\/span> ':path'<\/span> '\/'<\/span>\r\n5<\/span> ':path'<\/span> '\/index.html'<\/span>\r\n6<\/span> ':scheme'<\/span> 'http'<\/span>\r\n7<\/span> ':scheme'<\/span> 'https'<\/span>\r\n8<\/span> ':status'<\/span> '200'<\/span>\r\n... ...\r\n32<\/span> 'cookie'<\/span> ''<\/span>\r\n... ...\r\n60<\/span> 'via'<\/span> ''<\/span>\r\n61<\/span> 'www-authenticate'<\/span> ''<\/span>\r\n62<\/span> 'pragma'<\/span> 'no-cache'<\/span>\r\n63<\/span> 'cookie'<\/span> 'u=6f048d6e-adc4-4910-8e69-797c399ed456'<\/span>\r\n64<\/span> 'accept-language'<\/span> 'en-US,en;q=0.5'<\/span>\r\n65<\/span> 'accept'<\/span> 'text\/html,application\/xhtml+xml,application\/xml;q=0.9,*\/*;q=0.8'<\/span>\r\n66<\/span> 'user-agent'<\/span> 'Mozilla\/5.0 (Macintosh; Intel Mac OS X 10.11; rv:41.0) Gecko\/20100101 Firefox\/41.0'<\/span>\r\n67<\/span> ':authority'<\/span> 'imququ.com'<\/span>\r\n<\/pre>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u6bb5\u4ece Wireshark \u62f7\u51fa\u6765\u7684\u5934\u90e8\u6570\u636e\u53ef\u4ee5\u6b63\u5e38\u89e3\u7801\uff0c\u52a8\u6001\u5b57\u5178\u4e5f\u5f97\u5230\u4e86\u66f4\u65b0\uff0862 - 67\uff09\u3002<\/p>\n
\u603b\u7ed3<\/strong><\/div>\n
\u5728\u8fdb\u884c HTTP\/2 \u7f51\u7ad9\u6027\u80fd\u4f18\u5316\u65f6\u5f88\u91cd\u8981\u4e00\u70b9\u662f\u300c\u4f7f\u7528\u5c3d\u53ef\u80fd\u5c11\u7684\u8fde\u63a5\u6570\u300d\uff0c\u672c\u6587\u63d0\u5230\u7684\u5934\u90e8\u538b\u7f29\u662f\u5176\u4e2d\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u539f\u56e0\uff1a\u540c\u4e00\u4e2a\u8fde\u63a5\u4e0a\u4ea7\u751f\u7684\u8bf7\u6c42\u548c\u54cd\u5e94\u8d8a\u591a\uff0c\u52a8\u6001\u5b57\u5178\u79ef\u7d2f\u5f97\u8d8a\u5168\uff0c\u5934\u90e8\u538b\u7f29\u6548\u679c\u4e5f\u5c31\u8d8a\u597d\u3002\u6240\u4ee5\uff0c\u9488\u5bf9 HTTP\/2 \u7f51\u7ad9\uff0c\u6700\u4f73\u5b9e\u8df5\u662f\u4e0d\u8981\u5408\u5e76\u8d44\u6e90\uff0c\u4e0d\u8981\u6563\u5217\u57df\u540d\u3002<\/p>\n
\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6d4f\u89c8\u5668\u4f1a\u9488\u5bf9\u8fd9\u4e9b\u60c5\u51b5\u4f7f\u7528\u540c\u4e00\u4e2a\u8fde\u63a5\uff1a<\/p>\n
\n
\u540c\u4e00\u57df\u540d\u4e0b\u7684\u8d44\u6e90\uff1b<\/li>\n
\u4e0d\u540c\u57df\u540d\u4e0b\u7684\u8d44\u6e90\uff0c\u4f46\u662f\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\uff1a1\uff09\u89e3\u6790\u5230\u540c\u4e00\u4e2a IP\uff1b2\uff09\u4f7f\u7528\u540c\u4e00\u4e2a\u8bc1\u4e66\uff1b<\/li>\n<\/ul>\n
\u4e0a\u9762\u7b2c\u4e00\u70b9\u5bb9\u6613\u7406\u89e3\uff0c\u7b2c\u4e8c\u70b9\u5219\u5f88\u5bb9\u6613\u88ab\u5ffd\u7565\u3002\u5b9e\u9645\u4e0a Google \u5df2\u7ecf\u8fd9\u4e48\u505a\u4e86\uff0cGoogle \u4e00\u7cfb\u5217\u7f51\u7ad9\u90fd\u5171\u7528\u4e86\u540c\u4e00\u4e2a\u8bc1\u4e66\uff0c\u53ef\u4ee5\u8fd9\u6837\u9a8c\u8bc1\uff1a<\/p>\n
$ openssl s_client -connect google.com:443<\/span> |openssl x509 -noout -text | grep DNS\r\n\r\ndepth=2<\/span> C = US, O = GeoTrust Inc., CN = GeoTrust Global CA\r\nverify error:num=20<\/span>:unable to get local<\/span> issuer certificate\r\nverify return<\/span>:0<\/span>\r\n DNS:*.google.com, DNS:*.android.com, DNS:*.appengine.google.com, DNS:*.cloud.google.com, DNS:*.google-analytics.com, DNS:*.google.ca, DNS:*.google.cl, DNS:*.google.co.in, DNS:*.google.co.jp, DNS:*.google.co.uk, DNS:*.google.com.ar, DNS:*.google.com.au, DNS:*.google.com.br, DNS:*.google.com.co, DNS:*.google.com.mx, DNS:*.google.com.tr, DNS:*.google.com.vn, DNS:*.google.de, DNS:*.google.es, DNS:*.google.fr, DNS:*.google.hu, DNS:*.google.it, DNS:*.google.nl, DNS:*.google.pl, DNS:*.google.pt, DNS:*.googleadapis.com, DNS:*.googleapis.cn, DNS:*.googlecommerce.com, DNS:*.googlevideo.com, DNS:*.gstatic.cn, DNS:*.gstatic.com, DNS:*.gvt1.com, DNS:*.gvt2.com, DNS:*.metric.gstatic.com, DNS:*.urchin.com, DNS:*.url.google.com, DNS:*.youtube-nocookie.com, DNS:*.youtube.com, DNS:*.youtubeeducation.com, DNS:*.ytimg.com, DNS:android.com, DNS:g.co, DNS:goo.gl, DNS:google-analytics.com, DNS:google.com, DNS:googlecommerce.com, DNS:urchin.com, DNS:youtu.be, DNS:youtube.com, DNS:youtubeeducation.com\r\n<\/pre>\n
\u4f7f\u7528\u591a\u57df\u540d\u52a0\u4e0a\u76f8\u540c\u7684 IP \u548c\u8bc1\u4e66\u90e8\u7f72 Web \u670d\u52a1\u6709\u7279\u6b8a\u7684\u610f\u4e49\uff1a\u8ba9\u652f\u6301 HTTP\/2 \u7684\u7ec8\u7aef\u53ea\u5efa\u7acb\u4e00\u4e2a\u8fde\u63a5\uff0c\u7528\u4e0a HTTP\/2 \u534f\u8bae\u5e26\u6765\u7684\u5404\u79cd\u597d\u5904\uff1b\u800c\u53ea\u652f\u6301 HTTP\/1.1 \u7684\u7ec8\u7aef\u5219\u4f1a\u5efa\u7acb\u591a\u4e2a\u8fde\u63a5\uff0c\u8fbe\u5230\u540c\u65f6\u66f4\u591a\u5e76\u53d1\u8bf7\u6c42\u7684\u76ee\u7684\u3002\u8fd9\u5728 HTTP\/2 \u5b8c\u5168\u666e\u53ca\u524d\u4e5f\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002<\/p>\n
\n
\u539f\u6587\u6765\u81ea\uff1a https:\/\/imququ.com\/post\/header-compression-in-http2.html<\/a><\/p>\n
\u672c\u6587\u5730\u5740\uff1a http:\/\/lrxjmw.cn\/linux-web-http2.html<\/a>\u7f16\u8f91\uff1a\u5f20\u5b8f\u5b87\uff0c\u5ba1\u6838\u5458\uff1a\u9004\u589e\u5b9d<\/span><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
\u5bfc\u8bfb \u6211\u4eec\u77e5\u9053\uff0cHTTP\/2 \u534f\u8bae\u7531\u4e24\u4e2a RFC \u7ec4\u6210\uff1a\u4e00\u4e2a\u662f RFC 7540\uff0c\u63cf\u8ff0\u4e86 HTTP\/2 \u534f\u8bae\u672c […]<\/p>\n","protected":false},"author":309,"featured_media":8104,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-8084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/8084","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/309"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=8084"}],"version-history":[{"count":16,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/8084\/revisions"}],"predecessor-version":[{"id":248822,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/8084\/revisions\/248822"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/8104"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=8084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=8084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=8084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}