{"id":803,"date":"2010-10-01T11:49:53","date_gmt":"2010-10-01T11:49:53","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=803"},"modified":"2010-10-01T11:49:53","modified_gmt":"2010-10-01T11:49:53","slug":"http-%e5%8d%8f%e8%ae%ae","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2010\/10\/01\/http-%e5%8d%8f%e8%ae%ae\/","title":{"rendered":"HTTP \u534f\u8bae"},"content":{"rendered":"

Internet\u7684\u57fa\u672c\u534f\u8bae\u662fTCP\/IP\u534f\u8bae\uff0c\u5728TCP\/IP\u6a21\u578b\u6700\u4e0a\u5c42\u7684\u662f\u5e94\u7528\u5c42\uff08Application layer\uff09\uff0c\u5b83\u5305\u542b\u6240\u6709\u9ad8\u5c42\u7684\u534f\u8bae\u3002\u9ad8\u5c42\u534f\u8bae\u6709\uff1a\u6587\u4ef6\u4f20\u8f93\u534f\u8baeFTP\u3001\u7535\u5b50\u90ae\u4ef6\u4f20\u8f93\u534f\u8baeSMTP\u3001\u57df\u540d\u7cfb\u7edf\u670d\u52a1DNS\u3001\u7f51\u7edc\u65b0\u95fb\u4f20\u8f93\u534f\u8baeNNTP\u548cHTTP\u534f\u8bae\u7b49\u3002<\/p>\n

?? \u5728\u5730\u5740\u680f\u4e2d\u952e\u5165\uff1ahttp:\/\/www.google.com\/<\/a> \u5c31\u4ee3\u8868\u7528http\u7528\u6237\u534f\u8bae\u6765\u8bbf\u95ee\u6307\u5b9a\u4f4d\u7f6e\u7684\u4fe1\u606f\u3002
\n??
\n?? HTTP\u662f\u5de5\u4f5c\u6d41\u7a0b
\n\u4e00\u6b21HTTP\u64cd\u4f5c\u79f0\u4e3a\u4e00\u4e2a\u4e8b\u52a1\uff0c\u5176\u5de5\u4f5c\u8fc7\u7a0b\u53ef\u5206\u4e3a\u56db\u6b65\uff1a
\n\uff081\uff09\u9996\u5148\u5ba2\u6237\u673a\u4e0e\u670d\u52a1\u5668\u9700\u8981\u5efa\u7acb\u8fde\u63a5\u3002\u53ea\u8981\u5355\u51fb\u67d0\u4e2a\u8d85\u7ea7\u94fe\u63a5\uff0cHTTP\u7684\u5de5\u4f5c\u5c31\u5f00\u59cb\u4e86\u3002
\n\uff082\uff09\u8fde\u63a5\u540e\uff0c\u5ba2\u6237\u673a\u53d1\u9001\u4e00\u4e2a\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668\uff0c\u8bf7\u6c42\u65b9\u5f0f\u7684\u683c\u5f0f\u4e3a\uff1a\u7edf\u4e00\u8d44\u6e90\u6807\u8bc6\u7b26\uff08URL\uff09\u3001\u534f\u8bae\u7248\u672c\u53f7\uff0c\u540e\u8fb9\u662fMIME\u4fe1\u606f\u5305\u62ec\u8bf7\u6c42\u4fee\u9970\u7b26\u3001\u5ba2\u6237\u673a\u4fe1\u606f\u548c\u53ef\u80fd\u7684\u5185\u5bb9\u3002
\n\uff083\uff09\u670d\u52a1\u5668\u63a5\u5230\u8bf7\u6c42\u540e\uff0c\u7ed9\u4e88\u76f8\u5e94\u7684\u54cd\u5e94\u4fe1\u606f\uff0c\u5176\u683c\u5f0f\u4e3a\u4e00\u4e2a\u72b6\u6001\u884c\uff0c\u5305\u62ec\u4fe1\u606f\u7684\u534f\u8bae\u7248\u672c\u53f7\u3001\u4e00\u4e2a\u6210\u529f\u6216\u9519\u8bef\u7684\u4ee3\u7801\uff0c\u540e\u8fb9\u662fMIME\u4fe1\u606f\u5305\u62ec\u670d\u52a1\u5668\u4fe1\u606f\u3001\u5b9e\u4f53\u4fe1\u606f\u548c\u53ef\u80fd\u7684\u5185\u5bb9\u3002
\n\uff084\uff09\u5ba2\u6237\u7aef\u63a5\u6536\u670d\u52a1\u5668\u6240\u8fd4\u56de\u7684\u4fe1\u606f\u901a\u8fc7\u6d4f\u89c8\u5668\u663e\u793a\u5728\u7528\u6237\u7684\u663e\u793a\u5c4f\u4e0a\uff0c\u7136\u540e\u5ba2\u6237\u673a\u4e0e\u670d\u52a1\u5668\u65ad\u5f00\u8fde\u63a5\u3002
\n??? ?
\n??? http \u7531\u8bf7\u6c42\u4e0e\u54cd\u5e94\u4e24\u90e8\u5206\u7ec4\u6210\u3002<\/strong>
\n??? ?
\n??? 1\uff0c\u8bf7\u6c42\u62a5\u6587<\/strong>
\n???????? \u8bf7\u6c42\u884c\uff08request line\uff09\u3001\u8bf7\u6c42\u5934\u90e8\uff08header\uff09\u3001\u7a7a\u884c\u548c\u8bf7\u6c42\u6570\u636e4\u4e2a\u90e8\u5206\u7ec4\u6210
\n????????????? \u683c\u5f0f\uff1a<\/p>\n

???????????????? \u8bf7\u6c42\u65b9\u6cd5 URL http\u534f\u8bae\u7248\u672c?? \uff08\u8bf7\u6c42\u884c\uff09<\/p>\n

??????????????????? User-Agent\uff1a\u4ea7\u751f\u8bf7\u6c42\u7684\u6d4f\u89c8\u5668\u7c7b\u578b\u3002<\/p>\n

??????????????????? Accept\uff1a\u5ba2\u6237\u7aef\u53ef\u8bc6\u522b\u7684\u5185\u5bb9\u7c7b\u578b\u5217\u8868\u3002?????? (\u8bf7\u6c42\u5934\u90e8)<\/p>\n

??????????????????? Host\uff1a\u8bf7\u6c42\u7684\u4e3b\u673a\u540d\uff0c\u5141\u8bb8\u591a\u4e2a\u57df\u540d\u540c\u5904\u4e00\u4e2aIP\u5730\u5740\uff0c\u5373\u865a\u62df\u4e3b\u673a\u3002<\/p>\n

???????????????????? …..
\n?????????????????????????? \u7a7a\u7684\u4e00\u884c
\n?????????????????????????? \u8bf7\u6c42\u6570\u636e\uff08post\u65b9\u6cd5\u624d\u6709\uff09<\/p>\n

??? HTTP\u534f\u8bae\u7684\u8bf7\u6c42\u65b9\u6cd5\u6709GET\u3001POST\u3001HEAD\u3001PUT\u3001DELETE\u3001OPTIONS\u3001TRACE\u3001CONNECT\u3002\u6700\u5e38\u7528\u7684GET\u65b9\u6cd5\u548cPOST\u65b9\u6cd5\u3002<\/p>\n

??? get \u4e3b\u8981\u7528\u4e8e\u8bf7\u6c42\u670d\u52a1\u5668\u4f20\u6765\u6570\u636e\uff0c\u9002\u7528\u4e8e\u53c2\u6570\u4e0d\u591a\u7684\u9875\u9762\uff0c\u6545\u5176\u6ca1\u6709\u8bf7\u6c42\u6570\u636e\u6bb5\uff0c\u5b83\u4f20\u7684\u53c2\u6570\u5728\u8bf7\u6c42\u884c\u7684URL\u4e2d\u4f20\u9012\uff0c\u800cpost\u4e3b\u8981\u5411\u670d\u52a1\u5668\u4f20\u6570\u636e\uff0c\u9002\u7528\u4e8e\u5927\u91cf\u53c2\u6570\u7684\u9875\u9762\uff0c\u5b83\u7684\u53c2\u6570\u5b58\u50a8\u4e8e\u8bf7\u6c42\u6570\u636e\u4e2d\uff0c\u6545\u5728\u8bf7\u6c42\u884c\u7684URL\u4e2d\u4e0d\u7528\u518d\u5e26\u53c2\u3002\u8fd9\u4e5f\u662f\u7528get\u65b9\u6cd5url\u4f1a\u663e\u793a\u53c2\u6570\uff0c\u800cpost\u5374\u4e0d\u4f1a\u7684\u539f\u56e0\u6240\u5728\u3002<\/p>\n

??? \uff081\uff09get<\/p>\n

??? GET \/books\/?name=Professional%20Ajax HTTP\/1.1??????? (\u8bf7\u6c42\u884c)<\/p>\n

??? Host: www.wrox.com<\/a>???????????????????????????????????????????????????????? (\u8bf7\u6c42\u5934\u90e8)<\/p>\n

??? User-Agent: Mozilla\/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6)<\/p>\n

??? Gecko\/20050225 Firefox\/1.0.1<\/p>\n

??? Connection: Keep-Alive<\/p>\n

??? \u8bf7\u6c42\u884c<\/p>\n

??? \u8bf7\u6c42\u884c\u7684\u7b2c\u4e00\u90e8\u5206\u8bf4\u660e\u4e86\u8be5\u8bf7\u6c42\u662fGET\u8bf7\u6c42\u3002\u8be5\u884c\u7684\u7b2c\u4e8c\u90e8\u5206\u662f\u4e00\u4e2a\u659c\u6760\/books\/\uff0c\u7528\u6765\u8bf4\u660e\u8bf7\u6c42\u7684\u662f\u8be5\u57df\u540d\u7684\/books\u76ee\u5f55\u3002\u8be5\u884c\u7684\u6700\u540e\u4e00\u90e8\u5206\u8bf4\u660e\u4f7f\u7528\u7684\u662fHTTP 1.1\u7248\u672c\uff08\u53e6\u4e00\u4e2a\u53ef\u9009\u9879\u662f1.0\uff09\u3002\u518d\u914d\u5408host\u5c31\u662f\u6240\u8981\u7684\u4f4d\u7f6e\u3002<\/p>\n

??? \u8bf7\u6c42\u5934\u90e8<\/p>\n

?????????? \u7b2c2\u884c\u662f\u8bf7\u6c42\u7684\u7b2c\u4e00\u4e2a\u9996\u90e8\uff0cHOST\u3002\u9996\u90e8HOST\u5c06\u6307\u51fa\u8bf7\u6c42\u7684\u76ee\u7684\u5730\u3002\u7ed3\u5408HOST\u548c\u4e0a\u4e00\u884c\u4e2d\u7684\u659c\u6760\uff08\/books\uff09\uff0c\u53ef\u4ee5\u901a\u77e5\u670d\u52a1\u5668\u8bf7\u6c42\u7684\u662f? www.wrox.com\/books<\/a>\uff08HTTP 1.1\u624d\u9700\u8981\u4f7f\u7528\u9996\u90e8HOST\uff0c\u800c\u539f\u6765\u76841.0\u7248\u672c\u5219\u4e0d\u9700\u8981\u4f7f\u7528\uff09\u3002
\n?????????? \u7b2c\u4e09\u884c\u4e2d\u5305\u542b\u7684\u662f\u9996\u90e8 User-Agent\uff0c\u670d\u52a1\u5668\u7aef\u548c\u5ba2\u6237\u7aef\u811a\u672c\u90fd\u80fd\u591f\u8bbf\u95ee\u5b83\uff0c\u5b83\u662f\u6d4f\u89c8\u5668\u7c7b\u578b\u68c0\u6d4b\u903b\u8f91\u7684\u91cd\u8981\u57fa\u7840\u3002\u8be5\u4fe1\u606f\u7531\u4f60\u4f7f\u7528\u7684\u6d4f\u89c8\u5668\u6765\u5b9a\u4e49\uff08\u5728\u672c\u4f8b\u4e2d\u662f Firefox 1.0.1\uff09\uff0c\u5e76\u4e14\u5728\u6bcf\u4e2a\u8bf7\u6c42\u4e2d\u5c06\u81ea\u52a8\u53d1\u9001\u3002\u6700\u540e\u4e00\u884c\u662f\u9996\u90e8Connection\uff0c\u901a\u5e38\u5c06\u6d4f\u89c8\u5668\u64cd\u4f5c\u8bbe\u7f6e\u4e3aKeep-Alive\uff08\u5f53\u7136\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u4e3a\u5176\u4ed6\u503c\uff0c\u4f46\u8fd9\u5df2\u7ecf\u8d85\u51fa\u4e86\u672c\u4e66\u8ba8\u8bba\u7684\u8303\u56f4\uff09\u3002\u6ce8\u610f\uff0c\u5728\u6700\u540e\u4e00\u4e2a\u9996\u90e8\u4e4b\u540e\u6709\u4e00\u4e2a\u7a7a\u884c\u3002\u5373\u4f7f\u4e0d\u5b58\u5728\u8bf7\u6c42\u4e3b\u4f53\uff0c\u8fd9\u4e2a\u7a7a\u884c\u4e5f\u662f\u5fc5\u9700\u7684\u3002<\/p>\n

??? \uff082\uff09post<\/p>\n

??? POST \/ HTTP\/1.1?????????????????????????????? \uff08\u8bf7\u6c42\u884c\uff09<\/p>\n

??? Host: www.wrox.com\/<\/a>???????????????????? ? ? (\u8bf7\u6c42\u5934\u90e8)<\/p>\n

??? User-Agent: Mozilla\/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6)<\/p>\n

??? Gecko\/20050225 Firefox\/1.0.1<\/p>\n

??? Content-Type: application\/x-www-form-urlencoded??????? ?<\/p>\n

??? Content-Length: 40????????????????????? ?<\/p>\n

??? Connection: Keep-Alive<\/p>\n

??? name=Professional%20Ajax&publisher=Wiley????????????????????? \uff08 \u8bf7\u6c42\u6570\u636e\uff09<\/p>\n

??? \u9996\u90e8Host\u548cUser-Agent\u4ecd\u7136\u5b58\u5728\uff0c\u5728\u540e\u9762\u6709\u4e24\u4e2a\u65b0\u884c\u3002\u5176\u4e2d\u9996\u90e8Content-Type\u8bf4\u660e\u4e86\u8bf7\u6c42\u4e3b\u4f53\u7684\u5185\u5bb9\u662f\u5982\u4f55\u7f16\u7801\u7684\u3002\u6d4f\u89c8\u5668\u59cb\u7ec8\u4ee5application\/ x-www- form- urlencoded\u7684\u683c\u5f0f\u7f16\u7801\u6765\u4f20\u9001\u6570\u636e\uff0c\u8fd9\u662f\u9488\u5bf9\u7b80\u5355URL\u7f16\u7801\u7684MIME\u7c7b\u578b\u3002\u9996\u90e8Content-Length\u8bf4\u660e\u4e86\u8bf7\u6c42\u4e3b\u4f53\u7684\u5b57\u8282\u6570\u3002\u5728\u9996\u90e8Connection\u540e\u662f\u4e00\u4e2a\u7a7a\u884c\uff0c\u518d\u540e\u9762\u5c31\u662f\u8bf7\u6c42\u4e3b\u4f53\u3002\u4e0e\u5927\u591a\u6570\u6d4f\u89c8\u5668\u7684POST\u8bf7\u6c42\u4e00\u6837\uff0c\u8fd9\u662f\u4ee5\u7b80\u5355\u7684\u201c\u540d\u79f0?\u503c\u201d\u5bf9\u7684\u5f62\u5f0f\u7ed9\u51fa\u7684\uff0c\u5176\u4e2d name\u662fProfessional Ajax\uff0cpublisher\u662fWiley\u3002\u4f60\u53ef\u4ee5\u4ee5\u540c\u6837\u7684\u683c\u5f0f\u6765\u7ec4\u7ec7URL\u7684\u67e5\u8be2\u5b57\u7b26\u4e32\u53c2\u6570\u3002<\/p>\n

??? HTTP\u54cd\u5e94<\/p>\n

???? \u4e0e\u8bf7\u6c42\u4e0d\u540c\u70b9\u5c31\u5728\u4e8e\u8bf7\u6c42\u884c\uff01<\/p>\n

??? \u5982\u4e0b\u6240\u793a\uff0cHTTP\u54cd\u5e94\u7684\u683c\u5f0f\u4e0e\u8bf7\u6c42\u7684\u683c\u5f0f\u5341\u5206\u7c7b\u4f3c\uff1a<\/p>\n

??? <status-line><\/p>\n

??? <headers><\/p>\n

??? <blank line><\/p>\n

??? [<response-body>]<\/p>\n

??? \u6b63\u5982\u4f60\u6240\u89c1\uff0c\u5728\u54cd\u5e94\u4e2d\u552f\u4e00\u771f\u6b63\u7684\u533a\u522b\u5728\u4e8e\u7b2c\u4e00\u884c\u4e2d\u7528\u72b6\u6001\u4fe1\u606f\u4ee3\u66ff\u4e86\u8bf7\u6c42\u4fe1\u606f\u3002\u72b6\u6001\u884c\uff08status line\uff09\u901a\u8fc7\u63d0\u4f9b\u4e00\u4e2a\u72b6\u6001\u7801\u6765\u8bf4\u660e\u6240\u8bf7\u6c42\u7684\u8d44\u6e90\u60c5\u51b5\u3002\u4ee5\u4e0b\u5c31\u662f\u4e00\u4e2aHTTP\u54cd\u5e94\u7684\u4f8b\u5b50\uff1a<\/p>\n

??? HTTP\/1.1 200 OK<\/p>\n

??? Date: Sat, 31 Dec 2005 23:59:59 GMT<\/p>\n

??? Content-Type: text\/html;charset=ISO-8859-1<\/p>\n

??? Content-Length: 122<\/p>\n

??? <html><\/p>\n

??? <head><\/p>\n

??? <title>Wrox Homepage<\/title><\/p>\n

??? <\/head><\/p>\n

??? <body><\/p>\n

??? <!– body goes here –><\/p>\n

??? <\/body><\/p>\n

??? <\/html><\/p>\n

??? \u5728\u672c\u4f8b\u4e2d\uff0c\u72b6\u6001\u884c\u7ed9\u51fa\u7684HTTP\u72b6\u6001\u4ee3\u7801\u662f200\uff0c\u4ee5\u53ca\u6d88\u606fOK\u3002\u72b6\u6001\u884c\u59cb\u7ec8\u5305\u542b\u7684\u662f\u72b6\u6001\u7801\u548c\u76f8\u5e94\u7684\u7b80\u77ed\u6d88\u606f\uff0c\u4ee5\u907f\u514d\u6df7\u4e71\u3002\u6700\u5e38\u7528\u7684\u72b6\u6001\u7801\u6709\uff1a<\/p>\n

??? \u25c6200 (OK): \u627e\u5230\u4e86\u8be5\u8d44\u6e90\uff0c\u5e76\u4e14\u4e00\u5207\u6b63\u5e38\u3002<\/p>\n

??? \u25c6304 (NOT MODIFIED): \u8be5\u8d44\u6e90\u5728\u4e0a\u6b21\u8bf7\u6c42\u4e4b\u540e\u6ca1\u6709\u4efb\u4f55\u4fee\u6539\u3002\u8fd9\u901a\u5e38\u7528\u4e8e\u6d4f\u89c8\u5668\u7684\u7f13\u5b58\u673a\u5236\u3002<\/p>\n

??? \u25c6 401 (UNAUTHORIZED): \u5ba2\u6237\u7aef\u65e0\u6743\u8bbf\u95ee\u8be5\u8d44\u6e90\u3002\u8fd9\u901a\u5e38\u4f1a\u4f7f\u5f97\u6d4f\u89c8\u5668\u8981\u6c42\u7528\u6237\u8f93\u5165\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u4ee5\u767b\u5f55\u5230\u670d\u52a1\u5668\u3002<\/p>\n

??? \u25c6403 (FORBIDDEN): \u5ba2\u6237\u7aef\u672a\u80fd\u83b7\u5f97\u6388\u6743\u3002\u8fd9\u901a\u5e38\u662f\u5728401\u4e4b\u540e\u8f93\u5165\u4e86\u4e0d\u6b63\u786e\u7684\u7528\u6237\u540d\u6216\u5bc6\u7801\u3002<\/p>\n

??? \u25c6404 (NOT FOUND): \u5728\u6307\u5b9a\u7684\u4f4d\u7f6e\u4e0d\u5b58\u5728\u6240\u7533\u8bf7\u7684\u8d44\u6e90\u3002<\/p>\n

??? \u5728\u72b6\u6001\u884c\u4e4b\u540e\u662f\u4e00\u4e9b\u9996\u90e8\u3002\u901a\u5e38\uff0c\u670d\u52a1\u5668\u4f1a\u8fd4\u56de\u4e00\u4e2a\u540d\u4e3aData\u7684\u9996\u90e8\uff0c\u7528\u6765\u8bf4\u660e\u54cd\u5e94\u751f\u6210\u7684\u65e5\u671f\u548c\u65f6\u95f4\uff08\u670d\u52a1\u5668\u901a\u5e38\u8fd8\u4f1a\u8fd4\u56de\u4e00\u4e9b\u5173\u4e8e\u5176\u81ea\u8eab\u7684\u4fe1\u606f\uff0c\u5c3d\u7ba1\u5e76\u975e\u662f\u5fc5\u9700\u7684\uff09\u3002\u63a5\u4e0b\u6765\u7684\u4e24\u4e2a\u9996\u90e8\u5927\u5bb6\u5e94\u8be5\u719f\u6089\uff0c\u5c31\u662f\u4e0ePOST\u8bf7\u6c42\u4e2d\u4e00\u6837\u7684Content-Type\u548c Content-Length\u3002\u5728\u672c\u4f8b\u4e2d\uff0c\u9996\u90e8Content-Type\u6307\u5b9a\u4e86MIME\u7c7b\u578bHTML\uff08text\/html\uff09\uff0c\u5176\u7f16\u7801\u7c7b\u578b\u662fISO- 8859-1\uff08\u8fd9\u662f\u9488\u5bf9\u7f8e\u56fd\u82f1\u8bed\u8d44\u6e90\u7684\u7f16\u7801\u6807\u51c6\uff09\u3002\u54cd\u5e94\u4e3b\u4f53\u6240\u5305\u542b\u7684\u5c31\u662f\u6240\u8bf7\u6c42\u8d44\u6e90\u7684HTML\u6e90\u6587\u4ef6\uff08\u5c3d\u7ba1\u8fd8\u53ef\u80fd\u5305\u542b\u7eaf\u6587\u672c\u6216\u5176\u4ed6\u8d44\u6e90\u7c7b\u578b\u7684\u4e8c\u8fdb\u5236\u6570\u636e\uff09\u3002\u6d4f\u89c8\u5668\u5c06\u628a\u8fd9\u4e9b\u6570\u636e\u663e\u793a\u7ed9\u7528\u6237\u3002<\/p>\n

??? \u6ce8\u610f\uff0c\u8fd9\u91cc\u5e76\u6ca1\u6709\u6307\u660e\u9488\u5bf9\u8be5\u54cd\u5e94\u7684\u8bf7\u6c42\u7c7b\u578b\uff0c\u4e0d\u8fc7\u8fd9\u5bf9\u4e8e\u670d\u52a1\u5668\u5e76\u4e0d\u91cd\u8981\u3002\u5ba2\u6237\u7aef\u77e5\u9053\u6bcf\u79cd\u7c7b\u578b\u7684\u8bf7\u6c42\u5c06\u8fd4\u56de\u4ec0\u4e48\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5e76\u51b3\u5b9a\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u6570\u636e\u3002<\/p>\n

\u5934\u90e8<\/span><\/strong>
\n? \u5728\u9875\u9762\u4e2d\u53ef\u901a\u8fc7meta\u8bbe\u7f6e\u5982\uff1a<meta http-equiv=”Content-Type” content=”text\/html; charset=gb2312″ \/><\/p>\n

HTTP\u7684\u5934\u57df\u5305\u62ec\u901a\u7528\u5934\uff0c\u8bf7\u6c42\u5934\uff0c\u54cd\u5e94\u5934\u548c\u5b9e\u4f53\u5934\u56db\u4e2a\u90e8\u5206<\/strong>\u3002\u6bcf\u4e2a\u5934\u57df\u7531\u4e00\u4e2a\u57df\u540d\uff0c\u5192\u53f7\uff08:\uff09\u548c\u57df\u503c\u4e09\u90e8\u5206\u7ec4\u6210\u3002\u57df\u540d\u662f\u5927\u5c0f\u5199\u65e0\u5173\u7684\uff0c\u57df\u503c\u524d\u53ef\u4ee5\u6dfb\u52a0\u4efb\u4f55\u6570\u91cf\u7684\u7a7a\u683c\u7b26\uff0c\u5934\u57df\u53ef\u4ee5\u88ab\u6269\u5c55\u4e3a\u591a\u884c\uff0c\u5728\u6bcf\u884c\u5f00\u59cb\u5904\uff0c\u4f7f\u7528\u81f3\u5c11\u4e00\u4e2a\u7a7a\u683c\u6216\u5236\u8868\u7b26\u3002<\/p>\n

\u901a\u7528\u5934\u57df<\/strong><\/p>\n

??? \u901a\u7528\u5934\u57df\u5305\u542b\u8bf7\u6c42\u548c\u54cd\u5e94\u6d88\u606f\u90fd\u652f\u6301\u7684\u5934\u57df\uff0c\u901a\u7528\u5934\u57df\u5305\u542bCache-Control\u3001 Connection\u3001Date\u3001Pragma\u3001Transfer-Encoding\u3001Upgrade\u3001Via\u3002\u5bf9\u901a\u7528\u5934\u57df\u7684\u6269\u5c55\u8981\u6c42\u901a\u8baf\u53cc\u65b9\u90fd\u652f\u6301\u6b64\u6269\u5c55\uff0c\u5982\u679c\u5b58\u5728\u4e0d\u652f\u6301\u7684\u901a\u7528\u5934\u57df\uff0c\u4e00\u822c\u5c06\u4f1a\u4f5c\u4e3a\u5b9e\u4f53\u5934\u57df\u5904\u7406\u3002<\/p>\n

(1)Cache-Control\u5934\u57df\uff08\u8bf7\u6c42\u548c\u5e94\u7b54\u901a\u7528\u5934\u57df\uff09
\nCache -Control\u6307\u5b9a\u8bf7\u6c42\u548c\u54cd\u5e94\u9075\u5faa\u7684\u7f13\u5b58\u673a\u5236\u3002\u4e0d\u8981\u7f13\u5b58\u7684\u5b9e\u4f53\uff0c\u8981\u6c42\u73b0\u5728\u4eceWEB\u670d\u52a1\u5668\u53bb\u53d6,\u5728\u8bf7\u6c42\u6d88\u606f\u6216\u54cd\u5e94\u6d88\u606f\u4e2d\u8bbe\u7f6eCache-Control\u5e76\u4e0d\u4f1a\u4fee\u6539\u53e6\u4e00\u4e2a\u6d88\u606f\u5904\u7406\u8fc7\u7a0b\u4e2d\u7684\u7f13\u5b58\u5904\u7406\u8fc7\u7a0b\u3002\u8bf7\u6c42\u65f6\u7684\u7f13\u5b58\u6307\u4ee4\u5305\u62ecno-cache\u3001no-store\u3001max-age\u3001max-stale\u3001min-fresh\u3001only-if-cached\uff0c\u54cd\u5e94\u6d88\u606f\u4e2d\u7684\u6307\u4ee4\u5305\u62ecpublic\u3001private\u3001no-cache\u3001no-store\u3001no-transform\u3001must-revalidate\u3001 proxy-revalidate\u3001max-age\u3002
\n\u5404\u4e2a\u6d88\u606f\u4e2d\u7684\u6307\u4ee4\u542b\u4e49\u5982\u4e0b\uff1a
\nPublic \u6307\u793a\u54cd\u5e94\u53ef\u88ab\u4efb\u4f55\u7f13\u5b58\u533a\u7f13\u5b58\u3002
\nPrivate \u6307\u793a\u5bf9\u4e8e\u5355\u4e2a\u7528\u6237\u7684\u6574\u4e2a\u6216\u90e8\u5206\u54cd\u5e94\u6d88\u606f\uff0c\u4e0d\u80fd\u88ab\u5171\u4eab\u7f13\u5b58\u5904\u7406\u3002\u8fd9\u5141\u8bb8\u670d\u52a1\u5668\u4ec5\u4ec5\u63cf\u8ff0\u5f53\u7528\u6237\u7684\u90e8\u5206\u54cd\u5e94\u6d88\u606f\uff0c\u6b64\u54cd\u5e94\u6d88\u606f\u5bf9\u4e8e\u5176\u4ed6\u7528\u6237\u7684\u8bf7\u6c42\u65e0\u6548\u3002
\nno-cache \u6307\u793a\u8bf7\u6c42\u6216\u54cd\u5e94\u6d88\u606f\u4e0d\u80fd\u7f13\u5b58
\nno-store \u7528\u4e8e\u9632\u6b62\u91cd\u8981\u7684\u4fe1\u606f\u88ab\u65e0\u610f\u7684\u53d1\u5e03\u3002\u5728\u8bf7\u6c42\u6d88\u606f\u4e2d\u53d1\u9001\u5c06\u4f7f\u5f97\u8bf7\u6c42\u548c\u54cd\u5e94\u6d88\u606f\u90fd\u4e0d\u4f7f\u7528\u7f13\u5b58\u3002
\nmax-age \u6307\u793a\u5ba2\u6237\u673a\u53ef\u4ee5\u63a5\u6536\u751f\u5b58\u671f\u4e0d\u5927\u4e8e\u6307\u5b9a\u65f6\u95f4\uff08\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff09\u7684\u54cd\u5e94\u3002
\nmin-fresh \u6307\u793a\u5ba2\u6237\u673a\u53ef\u4ee5\u63a5\u6536\u54cd\u5e94\u65f6\u95f4\u5c0f\u4e8e\u5f53\u524d\u65f6\u95f4\u52a0\u4e0a\u6307\u5b9a\u65f6\u95f4\u7684\u54cd\u5e94\u3002
\nmax-stale \u6307\u793a\u5ba2\u6237\u673a\u53ef\u4ee5\u63a5\u6536\u8d85\u51fa\u8d85\u65f6\u671f\u95f4\u7684\u54cd\u5e94\u6d88\u606f\u3002\u5982\u679c\u6307\u5b9amax-stale\u6d88\u606f\u7684\u503c\uff0c\u90a3\u4e48\u5ba2\u6237\u673a\u53ef\u4ee5\u63a5\u6536\u8d85\u51fa\u8d85\u65f6\u671f\u6307\u5b9a\u503c\u4e4b\u5185\u7684\u54cd\u5e94\u6d88\u606f\u3002
\n\u7981\u6b62\u9875\u9762\u7f13\u5b58\uff0c\uff1a<\/p>\n

?????????????????????????? request.setCharacterEncoding(“GB2312”);\/\/\u8bbe\u7f6e\u7f16\u7801
\n?????????????????????????? ((HttpServletResponse)response).setHeader(“Pragma”,”No-cache”);
\n?????????????????????????? ((HttpServletResponse)response).setHeader(“Cache-Control”,”no-cache”);
\n?????????????????????????? ((HttpServletResponse)response).setHeader(“Expires”,”0″);\/\/\u7981\u6b62\u7f13\u5b58<\/p>\n

(2)Connection
\n?Connection\uff1a\u8bf7\u6c42\uff1aclose\uff08\u544a\u8bc9WEB\u670d\u52a1\u5668\u6216\u8005\u4ee3\u7406\u670d\u52a1\u5668\uff0c\u5728\u5b8c\u6210\u672c\u6b21\u8bf7\u6c42\u7684\u54cd\u5e94\u540e\uff0c\u65ad\u5f00\u8fde\u63a5\uff0c\u4e0d\u8981\u7b49\u5f85\u672c\u6b21\u8fde\u63a5\u7684\u540e\u7eed\u8bf7\u6c42\u4e86\uff09\u3002
\nkeepalive\uff08\u544a\u8bc9WEB\u670d\u52a1\u5668\u6216\u8005\u4ee3\u7406\u670d\u52a1\u5668\uff0c\u5728\u5b8c\u6210\u672c\u6b21\u8bf7\u6c42\u7684\u54cd\u5e94\u540e\uff0c\u4fdd\u6301\u8fde\u63a5\uff0c\u7b49\u5f85\u672c\u6b21\u8fde\u63a5\u7684\u540e\u7eed\u8bf7\u6c42\uff09\u3002
\n\u54cd\u5e94\uff1aclose\uff08\u8fde\u63a5\u5df2\u7ecf\u5173\u95ed\uff09\u3002
\nkeepalive\uff08\u8fde\u63a5\u4fdd\u6301\u7740\uff0c\u5728\u7b49\u5f85\u672c\u6b21\u8fde\u63a5\u7684\u540e\u7eed\u8bf7\u6c42\uff09\u3002
\nKeep-Alive\uff1a\u5982\u679c\u6d4f\u89c8\u5668\u8bf7\u6c42\u4fdd\u6301\u8fde\u63a5\uff0c\u5219\u8be5\u5934\u90e8\u8868\u660e\u5e0c\u671b WEB \u670d\u52a1\u5668\u4fdd\u6301\u8fde\u63a5\u591a\u957f\u65f6\u95f4\uff08\u79d2\uff09\u3002
\n\u4f8b\u5982\uff1aKeep-Alive\uff1a300<\/p>\n

(3)Pragma \u4e3b\u8981\u4f7f\u7528 Pramga: no-cache\uff0c\u76f8\u5f53\u4e8e Cache-Control\uff1a no-cache\u3002
\n\u4f8b\u5982\uff1aPragma\uff1ano-cache
\n(4)Transfer-Encoding: WEB \u670d\u52a1\u5668\u8868\u660e\u81ea\u5df1\u5bf9\u672c\u54cd\u5e94\u6d88\u606f\u4f53\uff08\u4e0d\u662f\u6d88\u606f\u4f53\u91cc\u9762\u7684\u5bf9\u8c61\uff09\u4f5c\u4e86\u600e\u6837\u7684\u7f16\u7801\uff0c\u6bd4\u5982\u662f\u5426\u5206\u5757\uff08chunked\uff09\u3002\u4f8b\u5982\uff1aTransfer-Encoding: chunked<\/p>\n

(5)Via? \u5217\u51fa\u4ece\u5ba2\u6237\u7aef\u5230 \u6700\u7ec8\u670d\u52a1\u5668 \u6216\u8005\u76f8\u53cd\u65b9\u5411\u7684\u54cd\u5e94\u7ecf\u8fc7\u4e86\u54ea\u4e9b\u4ee3\u7406\u670d\u52a1\u5668\uff0c\u4ed6\u4eec\u7528\u4ec0\u4e48\u534f\u8bae\uff08\u548c\u7248\u672c\uff09\u53d1\u9001\u7684\u8bf7\u6c42\u3002
\n\u5f53\u5ba2\u6237\u7aef\u8bf7\u6c42\u5230\u8fbe\u7b2c\u4e00\u4e2a\u4ee3\u7406\u670d\u52a1\u5668\u65f6\uff0c\u8be5\u670d\u52a1\u5668\u4f1a\u5728\u81ea\u5df1\u53d1\u51fa\u7684\u8bf7\u6c42\u91cc\u9762\u6dfb\u52a0 Via \u5934\u90e8\uff0c\u5e76\u586b\u4e0a\u81ea\u5df1\u7684\u76f8\u5173\u4fe1\u606f\uff0c\u5f53\u4e0b\u4e00\u4e2a\u4ee3\u7406\u670d\u52a1\u5668
\n\u6536\u5230\u7b2c\u4e00\u4e2a\u4ee3\u7406\u670d\u52a1\u5668\u7684\u8bf7\u6c42\u65f6\uff0c\u4f1a\u5728\u81ea\u5df1\u53d1\u51fa\u7684\u8bf7\u6c42\u91cc\u9762\u590d\u5236\u524d\u4e00\u4e2a\u4ee3\u7406\u670d\u52a1\u5668\u7684\u8bf7\u6c42\u7684Via \u5934\u90e8\uff0c\u5e76\u628a\u81ea\u5df1\u7684\u76f8\u5173\u4fe1\u606f\u52a0\u5230\u540e\u9762\uff0c
\n\u4ee5\u6b64\u7c7b\u63a8\uff0c\u5f53 OCS \u6536\u5230\u6700\u540e\u4e00\u4e2a\u4ee3\u7406\u670d\u52a1\u5668\u7684\u8bf7\u6c42\u65f6\uff0c\u68c0\u67e5 Via \u5934\u90e8\uff0c\u5c31\u77e5\u9053\u8be5\u8bf7\u6c42\u6240\u7ecf\u8fc7\u7684\u8def\u7531\u3002
\n\u4f8b\u5982\uff1aVia\uff1a1.0 236-81.D07071953.sina.com.cn:80<\/a> (squid\/2.6.STABLE13)<\/p>\n

\u8bf7\u6c42\u5934\u57df
\n<\/strong>
\n\u8bf7\u6c42\u5934\u57df\u53ef\u80fd\u5305\u542b\u4e0b\u5217\u5b57\u6bb5Accept\u3001Accept- Charset\u3001Accept-Encoding\u3001Accept-Language\u3001Authorization\u3001From\u3001Host\u3001If- Modified-Since\u3001If-Match\u3001If-None-Match\u3001If-Range\u3001If-Unmodified- Since\u3001Max-Forwards\u3001Proxy-Authorization\u3001Range\u3001Referer\u3001User-Agent\u3002\u5bf9\u8bf7\u6c42\u5934\u57df\u7684\u6269\u5c55\u8981\u6c42\u901a\u8baf\u53cc\u65b9\u90fd\u652f\u6301\uff0c\u5982\u679c\u5b58\u5728\u4e0d\u652f\u6301\u7684\u8bf7\u6c42\u5934\u57df\uff0c\u4e00\u822c\u5c06\u4f1a\u4f5c\u4e3a\u5b9e\u4f53\u5934\u57df\u5904\u7406\u3002<\/p>\n

(1)Accept\uff1a\u544a\u8bc9WEB\u670d\u52a1\u5668\u81ea\u5df1\u63a5\u53d7\u4ec0\u4e48\u4ecb\u8d28\u7c7b\u578b\uff0c*\/* \u8868\u793a\u4efb\u4f55\u7c7b\u578b\uff0ctype\/* \u8868\u793a\u8be5\u7c7b\u578b\u4e0b\u7684\u6240\u6709\u5b50\u7c7b\u578b\uff0ctype\/sub-type\u3002
\n(2)Accept-Charset\uff1a \u6d4f\u89c8\u5668\u7533\u660e\u81ea\u5df1\u63a5\u6536\u7684\u5b57\u7b26\u96c6
\n(3)Accept-Encoding\uff1a \u6d4f\u89c8\u5668\u7533\u660e\u81ea\u5df1\u63a5\u6536\u7684\u7f16\u7801\u65b9\u6cd5\uff0c\u901a\u5e38\u6307\u5b9a\u538b\u7f29\u65b9\u6cd5\uff0c\u662f\u5426\u652f\u6301\u538b\u7f29\uff0c\u652f\u6301\u4ec0\u4e48\u538b\u7f29\u65b9\u6cd5\uff08gzip\uff0cdeflate\uff09
\n(4)Accept-Language\uff1a\uff1a\u6d4f\u89c8\u5668\u7533\u660e\u81ea\u5df1\u63a5\u6536\u7684\u8bed\u8a00. \u8ddf\u5b57\u7b26\u96c6\u7684\u533a\u522b\uff1a\u4e2d\u6587\u662f\u8bed\u8a00\uff0c\u4e2d\u6587\u6709\u591a\u79cd\u5b57\u7b26\u96c6\uff0c\u6bd4\u5982big5\uff0cgb2312\uff0cgbk\u7b49\u7b49\u3002<\/p>\n

(5)Authorization\uff1a\u5f53\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u6765\u81eaWEB\u670d\u52a1\u5668\u7684 WWW-Authenticate \u54cd\u5e94\u65f6\uff0c\u7528\u8be5\u5934\u90e8\u6765\u56de\u5e94\u81ea\u5df1\u7684\u8eab\u4efd\u9a8c\u8bc1\u4fe1\u606f\u7ed9WEB\u670d\u52a1\u5668\u3002
\n(6)Proxy-Authorization\uff1a\u6d4f\u89c8\u5668\u54cd\u5e94\u4ee3\u7406\u670d\u52a1\u5668\u7684\u8eab\u4efd\u9a8c\u8bc1\u8bf7\u6c42\uff0c\u63d0\u4f9b\u81ea\u5df1\u7684\u8eab\u4efd\u4fe1\u606f\u3002<\/p>\n

(7)Host\u5934\u57df
\nHost\u5934\u57df:\u5ba2\u6237\u7aef\u6307\u5b9a\u81ea\u5df1\u60f3\u8bbf\u95ee\u7684WEB\u670d\u52a1\u5668\u7684\u57df\u540d\/IP \u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002\u4f8b\u5982\uff1aHost\uff1arss.sina.com.cn<\/a>,\u5fc5\u987b\u8868\u793a\u8bf7\u6c42url\u7684\u539f\u59cb\u670d\u52a1\u5668\u6216\u7f51\u5173\u7684\u4f4d\u7f6e\u3002HTTP\/1.1\u8bf7\u6c42\u5fc5\u987b\u5305\u542b\u4e3b\u673a\u5934\u57df\uff0c\u5426\u5219\u7cfb\u7edf\u4f1a\u4ee5400\u72b6\u6001\u7801\u8fd4\u56de\u3002<\/p>\n

(8)User-Agent: \u6d4f\u89c8\u5668\u8868\u660e\u81ea\u5df1\u7684\u8eab\u4efd\uff08\u662f\u54ea\u79cd\u6d4f\u89c8\u5668\uff09\u3002
\n\u4f8b\u5982\uff1aUser-Agent\uff1aMozilla\/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.14) Gecko\/20080404 Firefox\/2.0.0.14<\/a><\/p>\n

(9)If-Modified-Since\uff1a\u5982\u679c\u8bf7\u6c42\u7684\u5bf9\u8c61\u5728\u8be5\u5934\u90e8\u6307\u5b9a\u7684\u65f6\u95f4\u4e4b\u540e\u4fee\u6539\u4e86\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\uff08\u6bd4\u5982\u8fd4\u56de\u5bf9\u8c61\uff09\uff0c\u5426\u5219\u8fd4\u56de\u4ee3\u7801304\uff0c\u544a\u8bc9\u6d4f\u89c8\u5668\u8be5\u5bf9\u8c61\u6ca1\u6709\u4fee\u6539\u3002\u4f8b\u5982\uff1aIf-Modified-Since\uff1aThu, 10 Apr 2008 09:14:42 GMT<\/p>\n

(10)If-Unmodified- Sincee\uff1a\u5982\u679c\u8bf7\u6c42\u7684\u5bf9\u8c61\u5728\u8be5\u5934\u90e8\u6307\u5b9a\u7684\u65f6\u95f4\u4e4b\u540e\u6ca1\u4fee\u6539\u8fc7\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\uff08\u6bd4\u5982\u8fd4\u56de\u5bf9\u8c61\uff09\u3002<\/p>\n

(11)If-Match\uff1a\u5982\u679c\u5bf9\u8c61\u7684 ETag \u6ca1\u6709\u6539\u53d8\uff0c\u5176\u5b9e\u4e5f\u5c31\u610f\u5473\u8457\u5bf9\u8c61\u6ca1\u6709\u6539\u53d8\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\u3002
\n(12)If-None-Match\uff1a\u5982\u679c\u5bf9\u8c61\u7684 ETag \u6539\u53d8\u4e86\uff0c\u5176\u5b9e\u4e5f\u5c31\u610f\u5473\u8457\u5bf9\u8c61\u4e5f\u6539\u53d8\u4e86\uff0c\u624d\u6267\u884c\u8bf7\u6c42\u7684\u52a8\u4f5c\u3002<\/p>\n

(13)If-Range\uff1a\u6d4f\u89c8\u5668\u544a\u8bc9 WEB \u670d\u52a1\u5668\uff0c\u5982\u679c\u6211\u8bf7\u6c42\u7684\u5bf9\u8c61\u6ca1\u6709\u6539\u53d8\uff0c\u5c31\u628a\u6211\u7f3a\u5c11\u7684\u90e8\u5206\u7ed9\u6211\uff0c\u5982\u679c\u5bf9\u8c61\u6539\u53d8\u4e86\uff0c\u5c31\u628a\u6574\u4e2a\u5bf9\u8c61\u7ed9\u6211\u3002\u6d4f\u89c8\u5668\u901a\u8fc7\u53d1\u9001\u8bf7\u6c42\u5bf9\u8c61\u7684 ETag \u6216\u8005 \u81ea\u5df1\u6240\u77e5\u9053\u7684\u6700\u540e\u4fee\u6539\u65f6\u95f4\u7ed9 WEB \u670d\u52a1\u5668\uff0c\u8ba9\u5176\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u6539\u53d8\u4e86\u3002\u603b\u662f\u8ddf Range \u5934\u90e8\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n

(14)Referer\uff1a\u6d4f\u89c8\u5668\u5411 WEB \u670d\u52a1\u5668\u8868\u660e\u81ea\u5df1\u662f\u4ece\u54ea\u4e2a \u7f51\u9875\/URL \u83b7\u5f97\/\u70b9\u51fb \u5f53\u524d\u8bf7\u6c42\u4e2d\u7684\u7f51\u5740\/URL,\u8fd9\u53ef\u4ee5\u5141\u8bb8\u670d\u52a1\u5668\u751f\u6210\u56de\u9000\u94fe\u8868\uff0c\u53ef\u7528\u6765\u767b\u9646\u3001\u4f18\u5316cache\u7b49,\u4f8b\u5982\uff1aReferer\uff1ahttp:\/\/www.sina.com\/<\/a><\/p>\n

\u54cd\u5e94\u5934\u57df<\/strong><\/p>\n

\u54cd\u5e94\u5934\u57df\u5141\u8bb8\u670d\u52a1\u5668\u4f20\u9012\u4e0d\u80fd\u653e\u5728\u72b6\u6001\u884c\u7684\u9644\u52a0\u4fe1\u606f\uff0c\u8fd9\u4e9b\u57df\u4e3b\u8981\u63cf\u8ff0\u670d\u52a1\u5668\u7684\u4fe1\u606f\u548cRequest-URI\u8fdb\u4e00\u6b65\u7684\u4fe1\u606f\u3002\u54cd\u5e94\u5934\u57df\u5305\u542bAge\u3001 Location\u3001Proxy-Authenticate\u3001Public\u3001Retry-After\u3001Server\u3001Vary\u3001Warning\u3001WWW- Authenticate\u3002\u5bf9\u54cd\u5e94\u5934\u57df\u7684\u6269\u5c55\u8981\u6c42\u901a\u8baf\u53cc\u65b9\u90fd\u652f\u6301\uff0c\u5982\u679c\u5b58\u5728\u4e0d\u652f\u6301\u7684\u54cd\u5e94\u5934\u57df\uff0c\u4e00\u822c\u5c06\u4f1a\u4f5c\u4e3a\u5b9e\u4f53\u5934\u57df\u5904\u7406\u3002\u3002<\/p>\n

(1)Content-Encoding\uff1aWEB\u670d\u52a1\u5668\u8868\u660e\u81ea\u5df1\u4f7f\u7528\u4e86\u4ec0\u4e48\u538b\u7f29\u65b9\u6cd5\uff08gzip\uff0cdeflate\uff09\u538b\u7f29\u54cd\u5e94\u4e2d\u7684\u5bf9\u8c61\u3002
\n\u4f8b\u5982\uff1aContent-Encoding\uff1agzip
\n(2)Content-Language\uff1aWEB \u670d\u52a1\u5668\u544a\u8bc9\u6d4f\u89c8\u5668\u81ea\u5df1\u54cd\u5e94\u7684\u5bf9\u8c61\u7684\u8bed\u8a00\u3002
\n(3)Content-Length\uff1a WEB \u670d\u52a1\u5668\u544a\u8bc9\u6d4f\u89c8\u5668\u81ea\u5df1\u54cd\u5e94\u7684\u5bf9\u8c61\u7684\u957f\u5ea6\u3002
\n\u4f8b\u5982\uff1aContent-Length: 26012
\n(4)Content-Range\uff1a WEB \u670d\u52a1\u5668\u8868\u660e\u8be5\u54cd\u5e94\u5305\u542b\u7684\u90e8\u5206\u5bf9\u8c61\u4e3a\u6574\u4e2a\u5bf9\u8c61\u7684\u54ea\u4e2a\u90e8\u5206\u3002
\n\u4f8b\u5982\uff1aContent-Range: bytes 21010-47021\/47022
\n(5)Content-Type\uff1a WEB \u670d\u52a1\u5668\u544a\u8bc9\u6d4f\u89c8\u5668\u81ea\u5df1\u54cd\u5e94\u7684\u5bf9\u8c61\u7684\u7c7b\u578b\u3002
\n\u4f8b\u5982\uff1aContent-Type\uff1aapplication\/xml<\/p>\n

(6)Age\uff1a\u5f53\u4ee3\u7406\u670d\u52a1\u5668\u7528\u81ea\u5df1\u7f13\u5b58\u7684\u5b9e\u4f53\u53bb\u54cd\u5e94\u8bf7\u6c42\u65f6\uff0c\u7528\u8be5\u5934\u90e8\u8868\u660e\u8be5\u5b9e\u4f53\u4ece\u4ea7\u751f\u5230\u73b0\u5728\u7ecf\u8fc7\u591a\u957f\u65f6\u95f4\u4e86\u3002<\/p>\n

(7)Location:\u7528\u4e8e\u91cd\u5b9a\u5411\u63a5\u6536\u8005\u5230\u4e00\u4e2a\u65b0URI\u5730\u5740\u3002WEB \u670d\u52a1\u5668\u544a\u8bc9\u6d4f\u89c8\u5668\uff0c\u8bd5\u56fe\u8bbf\u95ee\u7684\u5bf9\u8c61\u5df2\u7ecf\u88ab\u79fb\u5230\u522b\u7684\u4f4d\u7f6e\u4e86\uff0c\u5230\u8be5\u5934\u90e8\u6307\u5b9a\u7684\u4f4d\u7f6e\u53bb\u53d6\u3002(redirect \u5c31\u662f\u5229\u7528\u6b64location\uff0c\u4f20\u56de\u4e00\u4e2a\u72b6\u6001\u7801\u53ca\u8981\u8bf7\u6c42\u7684url,url\u653e\u5728location\u4e2d)<\/p>\n

(8)Proxy-Authenticatee\uff1a \u4ee3\u7406\u670d\u52a1\u5668\u54cd\u5e94\u6d4f\u89c8\u5668\uff0c\u8981\u6c42\u5176\u63d0\u4f9b\u4ee3\u7406\u8eab\u4efd\u9a8c\u8bc1\u4fe1\u606f\u3002<\/p>\n

(9)Server: WEB \u670d\u52a1\u5668\u8868\u660e\u81ea\u5df1\u662f\u4ec0\u4e48\u8f6f\u4ef6\u53ca\u7248\u672c\u7b49\u4fe1\u606f\u3002\u6b64\u57df\u80fd\u5305\u542b\u591a\u4e2a\u4ea7\u54c1\u6807\u8bc6\u548c\u6ce8\u91ca\uff0c\u4ea7\u54c1\u6807\u8bc6\u4e00\u822c\u6309\u7167\u91cd\u8981\u6027\u6392\u5e8f\u3002\u4f8b\u5982\uff1aServer\uff1aApache\/2.0.61 (Unix)<\/p>\n

(10)Vary: WEB\u670d\u52a1\u5668\u7528\u8be5\u5934\u90e8\u7684\u5185\u5bb9\u544a\u8bc9 Cache \u670d\u52a1\u5668\uff0c\u5728\u4ec0\u4e48\u6761\u4ef6\u4e0b\u624d\u80fd\u7528\u672c\u54cd\u5e94\u6240\u8fd4\u56de\u7684\u5bf9\u8c61\u54cd\u5e94\u540e\u7eed\u7684\u8bf7\u6c42\u3002\u5047\u5982\u6e90WEB\u670d\u52a1\u5668\u5728\u63a5\u5230\u7b2c\u4e00\u4e2a\u8bf7\u6c42\u6d88\u606f\u65f6\uff0c\u5176\u54cd\u5e94\u6d88\u606f\u7684\u5934\u90e8\u4e3a\uff1aContent-Encoding: gzip; Vary: Content-Encoding\u90a3\u4e48 Cache \u670d\u52a1\u5668\u4f1a\u5206\u6790\u540e\u7eed\u8bf7\u6c42\u6d88\u606f\u7684\u5934\u90e8\uff0c\u68c0\u67e5\u5176 Accept-Encoding\uff0c\u662f\u5426\u8ddf\u5148\u524d\u54cd\u5e94\u7684 Vary \u5934\u90e8\u503c\u4e00\u81f4\uff0c\u5373\u662f\u5426\u4f7f\u7528\u76f8\u540c\u7684\u5185\u5bb9\u7f16\u7801\u65b9\u6cd5\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u9632\u6b62 Cache \u670d\u52a1\u5668\u7528\u81ea\u5df1 Cache \u91cc\u9762\u538b\u7f29\u540e\u7684\u5b9e\u4f53\u54cd\u5e94\u7ed9\u4e0d\u5177\u5907\u89e3\u538b\u80fd\u529b\u7684\u6d4f\u89c8\u5668\u3002\u4f8b\u5982\uff1aVary\uff1aAccept-Encoding<\/p>\n

(11)Location\u54cd\u5e94\u5934Location\u54cd\u5e94\u5934\u7528\u4e8e\u91cd\u5b9a\u5411\u63a5\u6536\u8005\u5230\u4e00\u4e2a\u65b0URI\u5730\u5740\u3002<\/p>\n

\u5b9e\u4f53<\/strong>
\n\u8bf7\u6c42\u6d88\u606f\u548c\u54cd\u5e94\u6d88\u606f\u90fd\u53ef\u4ee5\u5305\u542b\u5b9e\u4f53\u4fe1\u606f<\/strong>\uff0c\u5b9e\u4f53\u4fe1\u606f\u4e00\u822c\u7531\u5b9e\u4f53\u5934\u57df\u548c\u5b9e\u4f53\u7ec4\u6210\u3002\u5b9e\u4f53\u5934\u57df\u5305\u542b\u5173\u4e8e\u5b9e\u4f53\u7684\u539f\u4fe1\u606f,\u5b9e\u4f53\u5934\u5305\u62ec
\nAllow\u3001Content- Base\u3001
\nContent-Encoding\u3001
\nContent-Language\u3001
\nContent-Length\u3001
\nContent-Location\u3001
\nContent-MD5\u3001
\nContent-Range\u3001
\nContent-Type\u3001
\nEtag\u3001Expires\u3001
\nLast-Modified\u3001
\nextension-header\u3002<\/p>\n

extension-header\uff1a\u5141\u8bb8\u5ba2\u6237\u7aef\u5b9a\u4e49\u65b0\u7684\u5b9e\u4f53\u5934\uff0c\u4f46\u662f\u8fd9\u4e9b\u57df\u53ef\u80fd\u65e0\u6cd5\u672a\u63a5\u53d7\u65b9\u8bc6\u522b\u3002\u5b9e\u4f53\u53ef\u4ee5\u662f\u4e00\u4e2a\u7ecf\u8fc7\u7f16\u7801\u7684\u5b57\u8282\u6d41\uff0c\u5b83\u7684\u7f16\u7801\u65b9\u5f0f\u7531Content-Encoding\u6216Content-Type\u5b9a\u4e49\uff0c\u5b83\u7684\u957f\u5ea6\u7531Content-Length\u6216Content -Range\u5b9a\u4e49\u3002<\/p>\n

Content-Type\u5b9e\u4f53\u5934\uff1a\u7528\u4e8e\u5411\u63a5\u6536\u65b9\u6307\u793a\u5b9e\u4f53\u7684\u4ecb\u8d28\u7c7b\u578b\uff0c\u6307\u5b9aHEAD\u65b9\u6cd5\u9001\u5230\u63a5\u6536\u65b9\u7684\u5b9e\u4f53\u4ecb\u8d28\u7c7b\u578b\uff0c\u6216GET\u65b9\u6cd5\u53d1\u9001\u7684\u8bf7\u6c42\u4ecb\u8d28\u7c7b\u578b Content-Range\u5b9e\u4f53\u5934<\/p>\n

Content-Range\u5b9e\u4f53\u5934\uff1a\u7528\u4e8e\u6307\u5b9a\u6574\u4e2a\u5b9e\u4f53\u4e2d\u7684\u4e00\u90e8\u5206\u7684\u63d2\u5165\u4f4d\u7f6e\uff0c\u4ed6\u4e5f\u6307\u793a\u4e86\u6574\u4e2a\u5b9e\u4f53\u7684\u957f\u5ea6\u3002\u5728\u670d\u52a1\u5668\u5411\u5ba2\u6237\u8fd4\u56de\u4e00\u4e2a\u90e8\u5206\u54cd\u5e94\uff0c\u5b83\u5fc5\u987b\u63cf\u8ff0\u54cd\u5e94\u8986\u76d6\u7684\u8303\u56f4\u548c\u6574\u4e2a\u5b9e\u4f53\u957f\u5ea6\u3002\u4e00\u822c\u683c\u5f0f\uff1a<\/p>\n

Content-Range: bytes-unit SP first-byte-pos -last-byte-pos\/entity-legth
\n\u4f8b\u5982\uff0c\u4f20\u9001\u5934500\u4e2a\u5b57\u8282\u6b21\u5b57\u6bb5\u7684\u5f62\u5f0f\uff1aContent-Range: bytes 0-499\/1234 \u5982\u679c\u4e00\u4e2ahttp\u6d88\u606f\u5305\u542b\u6b64\u8282\uff08\u4f8b\u5982\uff0c\u5bf9\u8303\u56f4\u8bf7\u6c42\u7684\u54cd\u5e94\u6216\u5bf9\u4e00\u7cfb\u5217\u8303\u56f4\u7684\u91cd\u53e0\u8bf7\u6c42\uff09\uff0cContent-Range\u8868\u793a\u4f20\u9001\u7684\u8303\u56f4\uff0cContent- Length\u8868\u793a\u5b9e\u9645\u4f20\u9001\u7684\u5b57\u8282\u6570\u3002<\/p>\n

<\/span>Range\uff1a\u6d4f\u89c8\u5668\uff08\u6bd4\u5982 Flashget \u591a\u7ebf\u7a0b\u4e0b\u8f7d\u65f6\uff09\u544a\u8bc9 WEB \u670d\u52a1\u5668\u81ea\u5df1\u60f3\u53d6\u5bf9\u8c61\u7684\u54ea\u90e8\u5206\u3002\u53ef\u4ee5\u8bf7\u6c42\u5b9e\u4f53\u7684\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u5b50\u8303\u56f4\u3002\u4f8b\u5982\uff0c
\n\u8868\u793a\u5934500\u4e2a\u5b57\u8282\uff1a???????? bytes = 0 – 499
\n\u8868\u793a\u7b2c\u4e8c\u4e2a500\u5b57\u8282\uff1a?????? bytes = 500 – 999
\n\u8868\u793a\u6700\u540e500\u4e2a\u5b57\u8282\uff1a?????? bytes = -500
\n\u8868\u793a500\u5b57\u8282\u4ee5\u540e\u7684\u8303\u56f4\uff1a?? bytes = 500-
\n\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u5b57\u8282\uff1a???? bytes = 0-0 , -1
\n\u540c\u65f6\u6307\u5b9a\u51e0\u4e2a\u8303\u56f4\uff1a???????? bytes = 500-600, 601-999
\n\u4f46\u662f\u670d\u52a1\u5668\u53ef\u4ee5\u5ffd\u7565\u6b64\u8bf7\u6c42\u5934\uff0c\u5982\u679c\u65e0\u6761\u4ef6GET\u5305\u542bRange\u8bf7\u6c42\u5934\uff0c\u54cd\u5e94\u4f1a\u4ee5\u72b6\u6001\u7801206\uff08Partial Content\uff09\u8fd4\u56de\u800c\u4e0d\u662f\u4ee5200
\n\u4f8b\u5982\uff1aRange: bytes=1173546-<\/span><\/p>\n

ETag\uff1a\u5c31\u662f\u4e00\u4e2a\u5bf9\u8c61\uff08\u6bd4\u5982URL\uff09\u7684\u6807\u5fd7\u503c\uff0c\u5c31\u4e00\u4e2a\u5bf9\u8c61\u800c\u8a00\uff0c\u6bd4\u5982\u4e00\u4e2a html \u6587\u4ef6\uff0c\u5982\u679c\u88ab\u4fee\u6539\u4e86\uff0c\u5176 Etag \u4e5f\u4f1a\u522b\u4fee\u6539\uff0c\u6240\u4ee5\uff0cETag \u7684\u4f5c\u7528\u8ddf Last-Modified \u7684\u4f5c\u7528\u5dee\u4e0d\u591a\uff0c\u4e3b\u8981\u4f9b WEB \u670d\u52a1\u5668\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u6539\u53d8\u4e86\u3002\u6bd4\u5982\u524d\u4e00\u6b21\u8bf7\u6c42\u67d0\u4e2a html \u6587\u4ef6\u65f6\uff0c\u83b7\u5f97\u4e86\u5176 ETag\uff0c\u5f53\u8fd9\u6b21\u53c8\u8bf7\u6c42\u8fd9\u4e2a\u6587\u4ef6\u65f6\uff0c\u6d4f\u89c8\u5668\u5c31\u4f1a\u628a\u5148\u524d\u83b7\u5f97\u7684 ETag \u503c\u53d1\u9001\u7ed9WEB \u670d\u52a1\u5668\uff0c\u7136\u540e WEB \u670d\u52a1\u5668\u4f1a\u628a\u8fd9\u4e2a ETag \u8ddf\u8be5\u6587\u4ef6\u7684\u5f53\u524d ETag \u8fdb\u884c\u5bf9\u6bd4\uff0c\u7136\u540e\u5c31\u77e5\u9053\u8fd9\u4e2a\u6587\u4ef6\u6709\u6ca1\u6709\u6539\u53d8\u4e86\u3002
\n
\n<\/span>Last-Modified\uff1aWEB \u670d\u52a1\u5668\u8ba4\u4e3a\u5bf9\u8c61\u7684\u6700\u540e\u4fee\u6539\u65f6\u95f4\uff0c\u6bd4\u5982\u6587\u4ef6\u7684\u6700\u540e\u4fee\u6539\u65f6\u95f4\uff0c\u52a8\u6001\u9875\u9762\u7684\u6700\u540e\u4ea7\u751f\u65f6\u95f4\u7b49\u7b49\u3002\u4f8b\u5982\uff1aLast-Modified\uff1aTue, 06 May 2008 02:42:43 GMT<\/p>\n

Expired\uff1aWEB\u670d\u52a1\u5668\u8868\u660e\u8be5\u5b9e\u4f53\u5c06\u5728\u4ec0\u4e48\u65f6\u5019\u8fc7\u671f\uff0c\u5bf9\u4e8e\u8fc7\u671f\u4e86\u7684\u5bf9\u8c61\uff0c\u53ea\u6709\u5728\u8ddfWEB\u670d\u52a1\u5668\u9a8c\u8bc1\u4e86\u5176\u6709\u6548\u6027\u540e\uff0c\u624d\u80fd\u7528\u6765\u54cd\u5e94\u5ba2\u6237\u8bf7\u6c42\u3002
\n\u662f HTTP\/1.0 \u7684\u5934\u90e8\u3002\u4f8b\u5982\uff1aExpires\uff1aSat, 23 May 2009 10:02:12 GMT<\/span>(11) Last-Modified\uff1aWEB \u670d\u52a1\u5668\u8ba4\u4e3a\u5bf9\u8c61\u7684\u6700\u540e\u4fee\u6539\u65f6\u95f4\uff0c\u6bd4\u5982\u6587\u4ef6\u7684\u6700\u540e\u4fee\u6539\u65f6\u95f4\uff0c\u52a8\u6001\u9875\u9762\u7684\u6700\u540e\u4ea7\u751f\u65f6\u95f4\u7b49\u7b49\u3002
\n\u4f8b\u5982\uff1aLast-Modified\uff1aTue, 06 May 2008 02:42:43 GMT<\/span><\/p>\n

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