{"id":31519,"date":"2009-04-01T19:06:49","date_gmt":"2009-04-01T11:06:49","guid":{"rendered":"https:\/\/www.fuhaijun.com\/?p=31519"},"modified":"2009-04-01T19:06:49","modified_gmt":"2009-04-01T11:06:49","slug":"http%e9%95%bf%e8%bf%9e%e6%8e%a5%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%ab%af%e6%8e%a8%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"http:\/\/www.fuhaijun.com\/?p=31519","title":{"rendered":"HTTP\u957f\u8fde\u63a5\u670d\u52a1\u5668\u7aef\u63a8\u6280\u672f"},"content":{"rendered":"

\u670d\u52a1\u5668\u63a8\u9001(Server Push)<\/p>\n

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\u5ba2\u6237\u7aef\u62c9\u66f3(Client Pull)<\/p>\n

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\u5728\u5b9e\u9645\u60c5\u51b5\u4e2d\uff0c\u5efa\u7acbHTTP\u8fde\u63a5\u901a\u5e38\u9700\u8981\u82b1\u8d39\u76f8\u5f53\u591a\u7684\u65f6\u95f4\uff0c\u591a\u8fbe\u4e00\u79d2\u751a\u81f3\u66f4\u591a\u3002\u56e0\u6b64\u4ece\u6027\u80fd\u4e0a\u8003\u8651\uff0c\u670d\u52a1\u5668\u63a8\u9001\u5bf9\u4e8e\u6700\u7ec8\u7528\u6237\u66f4\u6709\u5438\u5f15\u529b\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u9700\u8981\u7ecf\u5e38\u66f4\u65b0\u4fe1\u606f\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n

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\u5982\u679c\u5b9e\u73b0\u670d\u52a1\u5668\u63a8\u9001\u7684CGI\u7a0b\u5e8f\u662f\u4f7f\u7528Shell\u811a\u672c\u8bed\u8a00\u7f16\u5199\u7684\uff0c\u6709\u65f6\u4f1a\u5b58\u5728\u4e00\u4e9b\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u5ba2\u6237\u7aef\u6700\u7ec8\u7528\u6237\u4e2d\u65ad\u8fde\u63a5\uff0cShell\u7a0b\u5e8f\u901a\u5e38\u4e0d\u80fd\u6ce8\u610f\u5230\uff0c\u8fd9\u5c06\u4f7f\u8d44\u6e90\u6beb\u65e0\u7528\u5904\u7684\u6d6a\u8d39\u6389\uff0c\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\u7684\u529e\u6cd5\u662f\u7528Perl\u6216\u8005C\u6765\u7f16\u5199\u8fd9\u7c7bCGI\u7a0b\u5e8f\uff0c\u4ee5\u4f7f\u7528\u6237\u4e2d\u65ad\u8fde\u63a5\u65f6\u80fd\u591f\u7ed3\u675f\u8fd0\u884c\u3002<\/p>\n

\u5982\u4e0a\u6240\u8ff0\uff0c\u5728\u670d\u52a1\u5668\u63a8\u9001\u4e2d\uff0c\u591a\u4e2a\u54cd\u5e94\u4e2d\u8fde\u63a5\u59cb\u7ec8\u4fdd\u6301\uff0c\u4f7f\u670d\u52a1\u5668\u53ef\u5728\u4efb\u4f55\u65f6\u95f4\u53d1\u9001\u66f4\u591a\u7684\u6570\u636e\u3002\u4e00\u4e2a\u660e\u663e\u7684\u597d\u5904\u662f\u670d\u52a1\u5668\u5b8c\u5168\u80fd\u591f\u63a7\u5236\u66f4\u65b0\u6570\u636e\u7684\u65f6\u95f4\u548c\u9891\u7387\u3002\u53e6\u5916\uff0c\u8fd9\u79cd\u65b9\u6cd5\u6548\u7387\u9ad8\uff0c\u56e0\u4e3a\u59cb\u7ec8\u4fdd\u6301\u8fde\u63a5\u3002\u7f3a\u70b9\u662f\u4fdd\u6301\u8fde\u63a5\u72b6\u6001\u4f1a\u6d6a\u8d39\u670d\u52a1\u5668\u7aef\u7684\u8d44\u6e90\u3002\u670d\u52a1\u5668\u63a8\u9001\u8fd8\u6bd4\u8f83\u5bb9\u6613\u4e2d\u65ad\u3002<\/p>\n

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\u670d\u52a1\u5668\u5728\u54cd\u5e94\u8bf7\u6c42\u65f6\uff0cHTTP\u4f7f\u7528MIME\u62a5\u6587\u683c\u5f0f\u6765\u5c01\u88c5\u6570\u636e\u3002\u901a\u5e38\u4e00\u4e2aHTTP\u54cd\u5e94\u53ea\u80fd\u5305\u542b\u4e00\u4e2a\u6570\u636e\u5757\u3002\u4f46MIME\u6709\u4e00\u79cd\u673a\u5236\u53ef\u7528\u4e00\u4e2a\u62a5\u6587\uff08\u6216HTTP\u54cd\u5e94\uff09\u8868\u793a\u5c06\u591a\u4e2a\u6570\u636e\u5757\uff0c\u8fd9\u79cd\u673a\u5236\u5c31\u662f\u6210\u4e3a\u201cmultipart\/mixed\u201d\u7684\u6807\u51c6MIME\u7c7b\u578b\u3002multipart\/mixed\u62a5\u6587\u5927\u4f53\u683c\u5f0f\u5982\u4e0b\uff1a
Content-type:multipart\/mixed;boundary=ThisRandomString
\u2013ThisRandomString
Content-type:text\/plain
\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u6570\u636e\u3002
\u2013ThisRandomString
Content-type:text\/plain
\u7b2c\u4e8c\u4e2a\u5bf9\u8c61\u7684\u6570\u636e\u3002
\u2013ThisRandomString\u2013<\/p>\n

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Content-type:multipart\/x-mixed-replace;boundary=ThisRandomString
\u2013ThisRandomString
Content-type:text\/plain
\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u6570\u636e
\u2013ThisRandomString
Content-type:text\/plain
\u7b2c\u4e8c\u4e2a\uff08\u6700\u540e\u4e00\u4e2a\uff09\u5bf9\u8c61\u7684\u6570\u636e\u3002
\u2013ThisRandomString\u2013
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HTTP\u8fde\u63a5\u59cb\u7ec8\u4fdd\u6301\uff0c\u56e0\u800c\u670d\u52a1\u5668\u53ef\u4ee5\u6309\u81ea\u5df1\u9700\u8981\u7684\u901f\u5ea6\u548c\u9891\u7387\u63a8\u9001\u65b0\u6570\u636e\uff0c\u4e24\u4e2a\u6570\u636e\u5757\u4e4b\u95f4\u6d4f\u89c8\u5668\u4ec5\u9700\u5728\u5f53\u524d\u7a97\u53e3\u7b49\u5019\uff0c\u7528\u6237\u751a\u81f3\u53ef\u4ee5\u5230\u5176\u4ed6\u7a97\u53e3\u505a\u522b\u7684\u4e8b\u60c5\uff0c\u5f53\u670d\u52a1\u5668\u9700\u8981\u53d1\u9001\u65b0\u6570\u636e\u65f6\uff0c\u5b83\u53ea\u662f\u6e90\uff08ABC\u8f93\u5165\u6cd5\u6ca1\u90a3\u4e2a\u5b57*&^$#\uff09\u4f20\u8f93\u7ba1\u9053\u53d1\u9001\u6570\u636e\u5757\uff0c\u5ba2\u6237\u7aef\u76f8\u5e94\u7684\u7a97\u53e3\u8fdb\u884c\u81ea\u6211\u66f4\u65b0\u3002<\/p>\n

\u5728\u670d\u52a1\u5668\u63a8\u9001\u6280\u672f\u4e2d\uff0c\u201cmultipart\/x-mixed-replace\u201d\u7c7b\u578b\u7684\u62a5\u6587\u7531\u552f\u4e00\u7684\u8fb9\u754c\u7ebf\u7ec4\u6210\uff0c\u8fd9\u4e9b\u8fb9\u754c\u7ebf\u5206\u5272\u6bcf\u4e2a\u6570\u636e\u5757\u3002\u6bcf\u4e2a\u6570\u636e\u5757\u90fd\u6709\u81ea\u5df1\u7684\u5934\u6807\uff0c\u56e0\u800c\u80fd\u591f\u6307\u5b9a\u5bf9\u8c61\u76f8\u5173\u7684\u5185\u5bb9\u7c7b\u578b\u548c\u5176\u4ed6\u4fe1\u606f\u3002\u7531\u4e8e\u201cmultipart\/x-mixed-replace\u201d\u7684\u7279\u6027\u662f\u6bcf\u4e00\u65b0\u6570\u636e\u5757\u53d6\u4ee3\u524d\u4e00\u6570\u636e\u5bf9\u8c61\uff0c\u56e0\u800c\u6d4f\u89c8\u5668\u4e2d\u603b\u662f\u663e\u793a\u6700\u65b0\u7684\u6570\u636e\u5bf9\u8c61\u3002
\u201cmultipart\/x-mixed-replace\u201d\u62a5\u6587\u6ca1\u6709\u7ed3\u5c3e\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u670d\u52a1\u5668\u53ef\u4ee5\u6c38\u8fdc\u4fdd\u6301\u8fde\u63a5\uff0c\u5e76\u53d1\u9001\u6240\u9700\u7684\u6570\u636e\u3002\u5982\u679c\u7528\u6237\u4e0d\u518d\u5728\u6d4f\u89c8\u5668\u7a97\u53e3\u4e2d\u663e\u793a\u6570\u636e\u6d41\uff0c\u6216\u8005\u6d4f\u89c8\u5668\u5230\u670d\u52a1\u5668\u95f4\u7684\u8fde\u63a5\u4e2d\u95f4\uff08\u4f8b\u5982\u7528\u6237\u6309\u201cSTOP\u201d\u6309\u94ae\uff09\uff0c\u670d\u52a1\u5668\u7684\u63a8\u9001\u624d\u4f1a\u4e2d\u65ad\u3002\u8fd9\u662f\u4eba\u4eec\u4f7f\u7528\u670d\u52a1\u5668\u63a8\u9001\u7684\u5178\u578b\u65b9\u5f0f\u3002<\/p>\n

\u5f53\u6d4f\u89c8\u5668\u53d1\u73b0\u201cContent-type\u201d\u5934\u6807\u6216\u5230\u8fbe\u5934\u6807\u7ed3\u675f\u5904\u65f6\uff0c\u6d4f\u89c8\u5668\u7a97\u53e3\u4e2d\u7684\u524d\u4e00\u4e2a\u6587\u6863\u88ab\u6e05\u9664\uff0c\u5e76\u5f00\u59cb\u663e\u793a\u4e0b\u4e00\u4e2a\u6587\u6863\u3002\u53d1\u73b0\u4e0b\u4e00\u4e2a\u62a5\u6587\u8fb9\u754c\u65f6\uff0c\u5c31\u8ba4\u4e3a\u5f53\u524d\u6570\u636e\u5757\uff08\u6587\u6863\uff09\u5df2\u7ecf\u7ed3\u675f\u3002
\u603b\u4e4b\uff0c\u670d\u52a1\u5668\u63a8\u9001\u7684\u6570\u636e\u7531\u4e00\u7ec4\u5934\u6807\uff08\u901a\u5e38\u5305\u62ec\u201cContent-type\u201d\uff09\u3001\u6570\u636e\u672c\u8eab\u548c\u5206\u5272\u7b26\uff08\u62a5\u6587\u8fb9\u754c\uff09\u4e09\u90e8\u5206\u7ec4\u6210\u3002\u6d4f\u89c8\u5668\u770b\u5230\u5206\u5272\u7b26\u65f6\uff0c\u5b83\u4fdd\u6301\u72b6\u6001\u4e0d\u53d8\uff0c\u76f4\u5230\u4e0b\u4e00\u4e2a\u6570\u636e\u5757\u5230\u8fbe\u3002<\/p>\n

\u5c06\u4ee5\u4e0a\u6982\u5ff5\u8fdb\u884c\u7528\u7f16\u7a0b\u65b9\u6cd5\u5b9e\u73b0\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u5b9e\u9645\u7684\u670d\u52a1\u5668\u63a8\u9001\u7a0b\u5e8f\u3002\u4f8b\u5982\uff0c\u4e0b\u9762\u7684Unix shell\u7a0b\u5e8f\u5c06\u4f7f\u6d4f\u89c8\u5668\u6bcf5\u79d2\u663e\u793a\u4e00\u6b21\u670d\u52a1\u5668\u4e0a\u7684\u8fdb\u7a0b\u5217\u8868\uff1a
#!\/bin\/sh
echo \u201cHTTP\/1.1 200\u2033
echo \u201cContent-type: multipart\/x-mixed-replace;boundary=\u2013ThisRandomString\u2013\u201d
echo \u201c\u201d
echo \u201c\u2013ThisRandomString\u2013\u201d
while true
do
echo \u201cContent-type: text\/html\u201d
echo \u201c\u201d
echo \u201ch2Processes on this machine updated every 5 seconds\/h2\u2033
echo \u201ctime:\u201d
date
echo \u201cp\u201d
echo \u201cplaintext\u201d
ps -el
echo \u201c\u2013ThisRandomString\u2013\u201d
sleep 5
done
\u6ce8\u610f\u5230\uff0c\u8fb9\u754c\u8bbe\u7f6e\u5728sleep\u8bed\u53e5\u4e4b\u524d\u53d1\u9001\uff0c\u8fd9\u80fd\u591f\u786e\u4fdd\u6d4f\u89c8\u5668\u6e05\u9664\u5176\u7f13\u51b2\u533a\uff0c\u5e76\u663e\u793a\u6240\u63a5\u6536\u5230\u7684\u6700\u65b0\u6570\u636e\u3002
NCSA HTTPD\u7528\u6237\u5728\u5185\u5bb9\u7c7b\u578b\u4e2d\u4e0d\u80fd\u4f7f\u7528\u7a7a\u683c\uff0c\u5305\u62ec\u8fb9\u754c\u53c2\u6570\u3002NCSA HTTPD\u53ea\u80fd\u5c06\u4e0d\u5e26\u7a7a\u683c\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u4f5c\u4e3a\u5185\u5bb9\u7c7b\u578b\u3002\u5982\u679c\u5728\u5185\u5bb9\u7c7b\u578b\u884c\u4e2d\u5b58\u5728\u7a7a\u683c\uff08\u5192\u53f7\u540e\u9762\u7684\u7a7a\u683c\u9664\u5916\uff09\uff0c\u7a7a\u683c\u540e\u7684\u4efb\u4f55\u6587\u672c\u90fd\u4f1a\u88ab\u5220\u9664\u3002
\u4e0b\u9762\u7684\u793a\u4f8b\u662f\u6b63\u786e\u7684\uff1a
Content-type: multipart\/x-mixed-replace;boundary=ThisRandomString
\u800c\u4e0b\u4f8b\u5219
\n\u4e0d\u80fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u56e0\u4e3a\u5b83\u5728\u4e2d\u95f4\u6709\u7a7a\u683c\uff1a
Content-type: multipart\/x-mixed-replace; boundary=ThisRandomString
\u670d\u52a1\u5668\u63a8\u9001\u7684\u53e6\u4e00\u4e2a\u4f18\u70b9\u662f\u5b83\u53ef\u4ee5\u9488\u5bf9\u5355\u4e2a\u5185\u8054\u56fe\u8c61\u8fdb\u884c\u3002\u5305\u62ec\u56fe\u8c61\u7684\u6587\u6863\u53ef\u4ee5\u7531\u670d\u52a1\u5668\u5b9a\u65f6\u6216\u5b9a\u5468\u671f\u8fdb\u884c\u66f4\u65b0\u3002\u800c\u5b9e\u73b0\u8fd9\u4e00\u70b9\u975e\u5e38\u7b80\u5355\uff1a\u53ea\u9700\u4f7fIMG\u5143\u7d20\u7684SRC\u5c5e\u6027\u6307\u5411\u63a8\u9001\u4e00\u7cfb\u5217\u56fe\u8c61\u7684URL\u5373\u53ef\u3002<\/p>\n

\u5982\u679c\u670d\u52a1\u5668\u63a8\u9001\u7528\u4e8e\u5355\u4e2a\u5185\u8054\u56fe\u8c61\uff0c\u6587\u6863\u4e2d\u7684\u56fe\u8c61\u5c31\u4f1a\u4e00\u6b21\u6b21\u88ab\u65b0\u63a8\u9001\u6765\u7684\u56fe\u8c61\u6240\u4ee3\u66ff\uff0c\u800c\u6587\u6863\u672c\u8eab\u4e0d\u9700\u53d8\u5316\uff08\u5047\u8bbe\u6587\u6863\u6ca1\u6709\u8fdb\u884c\u670d\u52a1\u5668\u63a8\u9001\uff09\u3002\u8fd9\u6837\uff0cWEB\u9875\u9762\u4e2d\u6709\u9650\u7684\u52a8\u753b\u5c31\u53ef\u4ee5\u4e3a\u9759\u6001\u753b\u9762\u6240\u4ee3\u66ff\u3002<\/p>\n

\u5ba2\u6237\u7aef\u62d6\u66f3<\/p>\n

\u5ba2\u6237\u7aef\u62d6\u66f3\u7684\u4e00\u4e2a\u7b80\u5355\u7528\u6cd5\u662f\u4f7f\u6587\u6863\u6309\u56fa\u5b9a\u5468\u671f\u81ea\u52a8\u91cd\u8f7d\u3002\u4f8b\u5982\uff0c\u8003\u8651\u4e0b\u9762\u7684HTML\u6587\u6863\uff1a<\/p>\n

This is Document ONE!<\/h3>\n

Here\u2019s some text.<\/p>\n

\u5982\u679c\u5c06\u5b83\u8f7d\u5165\u652f\u6301\u52a8\u6001\u6587\u6863\u7684\u6d4f\u89c8\u5668\uff08Netscape 1.1\u4ee5\u4e0a\uff0cInternet Explorer\u548cMosaic\u4e5f\u652f\u6301\u5ba2\u6237\u7aef\u62d6\u66f3\uff09\uff0c\u5b83\u5c06\u6bcf\u9694\u4e00\u79d2\u5c06\u81ea\u5df1\u91cd\u8f7d\u4e00\u6b21\u3002
\u7531\u4e8eMETA\u5143\u7d20\u5b9e\u9645\u662f\u5728HTML\u6587\u6863\u4e2d\u6a21\u62dfHTTP\u54cd\u5e94\u5934\u6807\uff0c\u6240\u4ee5\u5b83\u80fd\u591f\u544a\u77e5\u6d4f\u89c8\u5668\u5c06\u81ea\u8eab\u4fe1\u606f\u5f53\u4f5cHTTP\u54cd\u5e94\u4f7f\u7528\u3002\u4e0a\u4f8b\u4e2d\u7684META\u6807\u8bb0\u76f8\u5f53\u4e8e\uff1a
Refresh:1
\u8fd9\u6837\uff0c\u5b9e\u9645\u4e0a\u5c31\u662fHTTP\u5934\u6807\u544a\u77e5\u6d4f\u89c8\u5668\u6bcf\u4e00\u79d2\u66f4\u65b0\u4e00\u6b21\u6587\u6863\u3002\u5982\u679c\u9700\u8981\u5ef6\u65f6\u662f12\u79d2\uff0c\u90a3\u4e48\u5c31\u662f\u8fd9\u6837\u7684\u6307\u4ee4\uff1a<\/p>\n

\u90a3\u4e48\u5b83\u7b49\u6548\u4e8e\uff1a
Refresh:12<\/p>\n

\u5173\u4e8e\u5ba2\u6237\u7aef\u7684\u62d6\u66f3\u6211\u4e5f\u61d2\u7684\u7ee7\u7eed\u5199\u4e0b\u53bb\uff0c\u5173\u4e8e\u600e\u4e48\u4f7f\u5ba2\u6237\u7aef\u81ea\u52a8\u7533\u8bf7\u5176\u4ed6URL\u7684\u6570\u636e\u8bdd\uff0c\u8bf7\u4f7f\u7528\u5982\u4e0b\uff1a<\/p>\n

\u6ce8\u610f\u7684\u662f\uff0c\u6b64\u5904\u7684URL\u4e0d\u80fd\u4f7f\u7528\u76f8\u5bf9\u8def\u5f84\uff0c\u5fc5\u987b\u5168\u90e8\u6307\u5b9a\u3002<\/p>\n

\u5176\u4e2d\u65f6\u95f4\u95f4\u9694\u53ef\u4ee5\u8bbe\u7f6e\u4e3a0\uff0c\u8fd9\u6837\u6d4f\u89c8\u5668\u5728\u5f53\u524d\u6587\u6863\u663e\u793a\u5b8c\u6bd5\u540e\uff0c\u4ee5\u6700\u5feb\u7684\u901f\u5ea6\u8f7d\u5165\u65b0\u7684\u6570\u636e\uff01<\/p>\n

\u968f\u673a\u63a8\u8350<\/h5>\n","protected":false},"excerpt":{"rendered":"

\u670d\u52a1\u5668\u63a8\u9001(Server Push) \u63a8\u9001\u6280\u672f\u7684\u57fa\u7840\u601d\u60f3\u662f\u5c06\u6d4f\u89c8\u5668\u4e3b\u52a8\u67e5\u8be2\u4fe1\u606f\u6539\u4e3a\u670d\u52a1\u5668\u4e3b\u52a8\u53d1\u9001\u4fe1\u606f\u3002\u670d\u52a1\u5668\u53d1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31519","post","type-post","status-publish","format-standard","hentry","category-default"],"_links":{"self":[{"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts\/31519"}],"collection":[{"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=31519"}],"version-history":[{"count":0,"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=\/wp\/v2\/posts\/31519\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31519"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31519"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.fuhaijun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31519"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}