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2\u3001\u51cf\u5c11DNS\u67e5\u627e\u6b21\u6570
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3\u3001\u907f\u514d\u8df3\u8f6c
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\nHTTP\/1.1 301 Moved Permanently
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\n\u6709\u9884\u671f\u7684\u52a0\u8f7d\uff1a\u8f7d\u5165\u91cd\u65b0\u8bbe\u8ba1\u8fc7\u7684\u9875\u9762\u65f6\u4f7f\u7528\u9884\u52a0\u8f7d\u3002\u8fd9\u79cd\u60c5\u51b5\u7ecf\u5e38\u51fa\u73b0\u5728\u9875\u9762\u7ecf\u8fc7\u91cd\u65b0\u8bbe\u8ba1\u540e\u7528\u6237\u62b1\u6028\u201c\u65b0\u7684\u9875\u9762\u770b\u8d77\u6765\u5f88\u9177\uff0c\u4f46\u662f\u5374\u6bd4\u4ee5\u524d\u6162\u201d\u3002\u95ee\u9898\u53ef\u80fd\u51fa\u5728\u7528\u6237\u5bf9\u4e8e\u4f60\u7684\u65e7\u7ad9\u70b9\u5efa\u7acb\u4e86\u5b8c\u6574\u7684\u7f13\u5b58\uff0c\u800c\u5bf9\u4e8e\u65b0\u7ad9\u70b9\u5374\u6ca1\u6709\u4efb\u4f55\u7f13\u5b58\u5185\u5bb9\u3002\u56e0\u6b64\u4f60\u53ef\u4ee5\u5728\u8bbf\u95ee\u65b0\u7ad9\u4e4b\u524d\u5c31\u52a0\u8f7d\u4e00\u90e8\u5185\u5bb9\u6765\u907f\u514d\u8fd9\u79cd\u7ed3\u679c\u7684\u51fa\u73b0\u3002\u5728\u4f60\u7684\u65e7\u7ad9\u4e2d\u5229\u7528\u6d4f\u89c8\u5668\u7684\u7a7a\u4f59\u65f6\u95f4\u52a0\u8f7d\u65b0\u7ad9\u4e2d\u7528\u5230\u7684\u56fe\u50cf\u7684\u548c\u811a\u672c\u6765\u63d0\u9ad8\u8bbf\u95ee\u901f\u5ea6\u3002<\/p>\n
7\u3001\u51cf\u5c11DOM\u5143\u7d20\u6570\u91cf
\n\u4e00\u4e2a\u590d\u6742\u7684\u9875\u9762\u610f\u5473\u7740\u9700\u8981\u4e0b\u8f7d\u66f4\u591a\u6570\u636e\uff0c\u540c\u65f6\u4e5f\u610f\u5473\u7740JavaScript\u904d\u5386DOM\u7684\u6548\u7387\u8d8a\u6162\u3002\u6bd4\u5982\u5f53\u4f60\u589e\u52a0\u4e00\u4e2a\u4e8b\u4ef6\u53e5\u67c4\u65f6\u5728500\u548c5000\u4e2aDOM\u5143\u7d20\u4e2d\u5faa\u73af\u6548\u679c\u80af\u5b9a\u662f\u4e0d\u4e00\u6837\u7684\u3002
\n\u5927\u91cf\u7684DOM\u5143\u7d20\u7684\u5b58\u5728\u610f\u5473\u7740\u9875\u9762\u4e2d\u6709\u53ef\u4ee5\u4e0d\u7528\u79fb\u9664\u5185\u5bb9\u53ea\u9700\u8981\u66ff\u6362\u5143\u7d20\u6807\u7b7e\u5c31\u53ef\u4ee5\u7cbe\u7b80\u7684\u90e8\u5206\u3002\u4f60\u5728\u9875\u9762\u5e03\u5c40\u4e2d\u4f7f\u7528\u8868\u683c\u4e86\u5417\uff1f\u4f60\u6709\u6ca1\u6709\u4ec5\u4ec5\u4e3a\u4e86\u5e03\u5c40\u800c\u5f15\u5165\u66f4\u591a\u7684<div>\u5143\u7d20\u5462\uff1f\u4e5f\u8bb8\u4f1a\u5b58\u5728\u4e00\u4e2a\u9002\u5408\u6216\u8005\u5728\u8bed\u610f\u662f\u66f4\u8d34\u5207\u7684\u6807\u7b7e\u53ef\u4ee5\u4f9b\u4f60\u4f7f\u7528\u3002
\nYUI CSS utilities\u53ef\u4ee5\u7ed9\u4f60\u7684\u5e03\u5c40\u5e26\u6765\u5de8\u5927\u5e2e\u52a9\uff1agrids.css\u53ef\u4ee5\u5e2e\u4f60\u5b9e\u73b0\u6574\u4f53\u5e03\u5c40\uff0cfont.css\u548creset.css\u53ef\u4ee5\u5e2e\u52a9\u4f60\u79fb\u9664\u6d4f\u89c8\u5668\u9ed8\u8ba4\u683c\u5f0f\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u91cd\u65b0\u5ba1\u89c6\u4f60\u9875\u9762\u4e2d\u6807\u7b7e\u7684\u673a\u4f1a\uff0c\u6bd4\u5982\u53ea\u6709\u5728\u8bed\u610f\u4e0a\u6709\u610f\u4e49\u65f6\u624d\u4f7f\u7528<div>\uff0c\u800c\u4e0d\u662f\u56e0\u4e3a\u5b83\u5177\u6709\u6362\u884c\u6548\u679c\u624d\u4f7f\u7528\u5b83\u3002
\nDOM\u5143\u7d20\u6570\u91cf\u5f88\u5bb9\u6613\u8ba1\u7b97\u51fa\u6765\uff0c\u53ea\u9700\u8981\u5728Firebug\u7684\u63a7\u5236\u53f0\u5185\u8f93\u5165\uff1a
\ndocument.getElementsByTagName(‘*’).length
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8\u3001\u6839\u636e\u57df\u540d\u5212\u5206\u9875\u9762\u5185\u5bb9
\n\u628a\u9875\u9762\u5185\u5bb9\u5212\u5206\u6210\u82e5\u5e72\u90e8\u5206\u53ef\u4ee5\u4f7f\u4f60\u6700\u5927\u9650\u5ea6\u5730\u5b9e\u73b0\u5e73\u884c\u4e0b\u8f7d\u3002\u7531\u4e8eDNS\u67e5\u627e\u5e26\u6765\u7684\u5f71\u54cd\u4f60\u9996\u5148\u8981\u786e\u4fdd\u4f60\u4f7f\u7528\u7684\u57df\u540d\u6570\u91cf\u57282\u4e2a\u52304\u4e2a\u4e4b\u95f4\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u628a\u7528\u5230\u7684HTML\u5185\u5bb9\u548c\u52a8\u6001\u5185\u5bb9\u653e\u5728www.example.org\u4e0a\uff0c\u800c\u628a\u9875\u9762\u5404\u79cd\u7ec4\u4ef6\uff08\u56fe\u7247\u3001\u811a\u672c\u3001CSS)\u5206\u522b\u5b58\u653e\u5728statics1.example.org\u548cstatics.example.org\u4e0a\u3002
\n\u4f60\u53ef\u5728Tenni Theurer\u548cPatty Chi\u5408\u5199\u7684\u6587\u7ae0Maximizing Parallel Downloads in the Carpool Lane\u627e\u5230\u66f4\u591a\u76f8\u5173\u4fe1\u606f\u3002<\/p>\n
9\u3001\u4f7fiframe\u7684\u6570\u91cf\u6700\u5c0f
\nifrmae\u5143\u7d20\u53ef\u4ee5\u5728\u7236\u6587\u6863\u4e2d\u63d2\u5165\u4e00\u4e2a\u65b0\u7684HTML\u6587\u6863\u3002\u4e86\u89e3iframe\u7684\u5de5\u4f5c\u7406\u7136\u540e\u624d\u80fd\u66f4\u52a0\u6709\u6548\u5730\u4f7f\u7528\u5b83\uff0c\u8fd9\u4e00\u70b9\u5f88\u91cd\u8981\u3002<\/p>\n
<iframe>\u4f18\u70b9\uff1a
\n\u89e3\u51b3\u52a0\u8f7d\u7f13\u6162\u7684\u7b2c\u4e09\u65b9\u5185\u5bb9\u5982\u56fe\u6807\u548c\u5e7f\u544a\u7b49\u7684\u52a0\u8f7d\u95ee\u9898
\nSecurity sandbox
\n\u5e76\u884c\u52a0\u8f7d\u811a\u672c
\n<iframe>\u7684\u7f3a\u70b9\uff1a<\/p>\n
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\n\u4f1a\u963b\u6b62\u9875\u9762\u52a0\u8f7d
\n\u6ca1\u6709\u8bed\u610f
\n10\u3001\u4e0d\u8981\u51fa\u73b0404\u9519\u8bef
\nHTTP\u8bf7\u6c42\u65f6\u95f4\u6d88\u8017\u662f\u5f88\u5927\u7684\uff0c\u56e0\u6b64\u4f7f\u7528HTTP\u8bf7\u6c42\u6765\u83b7\u5f97\u4e00\u4e2a\u6ca1\u6709\u7528\u5904\u7684\u54cd\u5e94\uff08\u4f8b\u5982404\u6ca1\u6709\u627e\u5230\u9875\u9762\uff09\u662f\u5b8c\u5168\u6ca1\u6709\u5fc5\u8981\u7684\uff0c\u5b83\u53ea\u4f1a\u964d\u4f4e\u7528\u6237\u4f53\u9a8c\u800c\u4e0d\u4f1a\u6709\u4e00\u70b9\u597d\u5904\u3002
\n\u6709\u4e9b\u7ad9\u70b9\u628a404\u9519\u8bef\u54cd\u5e94\u9875\u9762\u6539\u4e3a\u201c\u4f60\u662f\u4e0d\u662f\u8981\u627e***\u201d\uff0c\u8fd9\u867d\u7136\u6539\u8fdb\u4e86\u7528\u6237\u4f53\u9a8c\u4f46\u662f\u540c\u6837\u4e5f\u4f1a\u6d6a\u8d39\u670d\u52a1\u5668\u8d44\u6e90\uff08\u5982\u6570\u636e\u5e93\u7b49\uff09\u3002\u6700\u7cdf\u7cd5\u7684\u60c5\u51b5\u662f\u6307\u5411\u5916\u90e8JavaScript\u7684\u94fe\u63a5\u51fa\u73b0\u95ee\u9898\u5e76\u8fd4\u56de404\u4ee3\u7801\u3002\u9996\u5148\uff0c\u8fd9\u79cd\u52a0\u8f7d\u4f1a\u7834\u574f\u5e76\u884c\u52a0\u8f7d\uff1b\u5176\u6b21\u6d4f\u89c8\u5668\u4f1a\u628a\u8bd5\u56fe\u5728\u8fd4\u56de\u7684404\u54cd\u5e94\u5185\u5bb9\u4e2d\u627e\u5230\u53ef\u80fd\u6709\u7528\u7684\u90e8\u5206\u5f53\u4f5cJavaScript\u4ee3\u7801\u6765\u6267\u884c\u3002<\/p>\n
11\u3001\u4f7f\u7528\u5185\u5bb9\u5206\u53d1\u7f51\u7edc
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\n\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08Content Delivery Network\uff0cCDN\uff09\u662f\u7531\u4e00\u7cfb\u5217\u5206\u6563\u5230\u5404\u4e2a\u4e0d\u540c\u5730\u7406\u4f4d\u7f6e\u4e0a\u7684Web\u670d\u52a1\u5668\u7ec4\u6210\u7684\uff0c\u5b83\u63d0\u9ad8\u4e86\u7f51\u7ad9\u5185\u5bb9\u7684\u4f20\u8f93\u901f\u5ea6\u3002\u7528\u4e8e\u5411\u7528\u6237\u4f20\u8f93\u5185\u5bb9\u7684\u670d\u52a1\u5668\u4e3b\u8981\u662f\u6839\u636e\u548c\u7528\u6237\u5728\u7f51\u7edc\u4e0a\u7684\u9760\u8fd1\u7a0b\u5ea6\u6765\u6307\u5b9a\u7684\u3002\u4f8b\u5982\uff0c\u62e5\u6709\u6700\u5c11\u7f51\u7edc\u8df3\u6570\uff08network hops\uff09\u548c\u54cd\u5e94\u901f\u5ea6\u6700\u5feb\u7684\u670d\u52a1\u5668\u4f1a\u88ab\u9009\u5b9a\u3002
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12\u3001\u4e3a\u6587\u4ef6\u5934\u6307\u5b9aExpires\u6216Cache-Control
\n\u8fd9\u6761\u5b88\u5219\u5305\u62ec\u4e24\u65b9\u9762\u7684\u5185\u5bb9\uff1a
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\n\u6d4f\u89c8\u5668\uff08\u548c\u4ee3\u7406\uff09\u4f7f\u7528\u7f13\u5b58\u6765\u51cf\u5c11HTTP\u8bf7\u6c42\u7684\u5927\u5c0f\u548c\u6b21\u6570\u4ee5\u52a0\u5feb\u9875\u9762\u8bbf\u95ee\u901f\u5ea6\u3002Web\u670d\u52a1\u5668\u5728HTTP\u54cd\u5e94\u4e2d\u4f7f\u7528Expires\u6587\u4ef6\u5934\u6765\u544a\u8bc9\u5ba2\u6237\u7aef\u5185\u5bb9\u9700\u8981\u7f13\u5b58\u591a\u957f\u65f6\u95f4\u3002\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\u662f\u4e00\u4e2a\u8f83\u957f\u65f6\u95f4\u7684Expires\u6587\u4ef6\u5934\uff0c\u5b83\u544a\u8bc9\u6d4f\u89c8\u5668\u8fd9\u4e2a\u54cd\u5e94\u76f4\u52302010\u5e744\u670815\u65e5\u624d\u8fc7\u671f\u3002
\nExpires: Thu, 15 Apr 2010 20:00:00 GMT
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\nExpiresDefault “access plus 10 years”
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13\u3001Gzip\u538b\u7f29\u6587\u4ef6\u5185\u5bb9
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\n\u4eceHTTP\/1.1\u5f00\u59cb\uff0cweb\u5ba2\u6237\u7aef\u90fd\u9ed8\u8ba4\u652f\u6301HTTP\u8bf7\u6c42\u4e2d\u6709Accept-Encoding\u6587\u4ef6\u5934\u7684\u538b\u7f29\u683c\u5f0f\uff1a
\nAccept-Encoding: gzip, deflate
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\nContent-Encoding: gzip
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\n\u670d\u52a1\u5668\u6839\u636e\u6587\u4ef6\u7c7b\u578b\u6765\u9009\u62e9\u9700\u8981\u8fdb\u884cgzip\u538b\u7f29\u7684\u6587\u4ef6\uff0c\u4f46\u662f\u8fd9\u8fc7\u4e8e\u9650\u5236\u4e86\u53ef\u538b\u7f29\u7684\u6587\u4ef6\u3002\u5927\u591a\u6570web\u670d\u52a1\u5668\u4f1a\u538b\u7f29HTML\u6587\u6863\u3002\u5bf9\u811a\u672c\u548c\u6837\u5f0f\u8868\u8fdb\u884c\u538b\u7f29\u540c\u6837\u4e5f\u662f\u503c\u5f97\u505a\u7684\u4e8b\u60c5\uff0c\u4f46\u662f\u5f88\u591aweb\u670d\u52a1\u5668\u90fd\u6ca1\u6709\u8fd9\u4e2a\u529f\u80fd\u3002\u5b9e\u9645\u4e0a\uff0c\u538b\u7f29\u4efb\u4f55\u4e00\u4e2a\u6587\u672c\u7c7b\u578b\u7684\u54cd\u5e94\uff0c\u5305\u62ecXML\u548cJSON\uff0c\u90fd\u503c\u5f97\u7684\u3002\u56fe\u50cf\u548cPDF\u6587\u4ef6\u7531\u4e8e\u5df2\u7ecf\u538b\u7f29\u8fc7\u4e86\u6240\u4ee5\u4e0d\u80fd\u518d\u8fdb\u884cgzip\u538b\u7f29\u3002\u5982\u679c\u8bd5\u56fegizp\u538b\u7f29\u8fd9\u4e9b\u6587\u4ef6\u7684\u8bdd\u4e0d\u4f46\u4f1a\u6d6a\u8d39CPU\u8d44\u6e90\u8fd8\u4f1a\u589e\u52a0\u6587\u4ef6\u7684\u5927\u5c0f\u3002
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14\u3001\u914d\u7f6eETag
\nEntity tags\uff08ETags\uff09\uff08\u5b9e\u4f53\u6807\u7b7e\uff09\u662fweb\u670d\u52a1\u5668\u548c\u6d4f\u89c8\u5668\u7528\u4e8e\u5224\u65ad\u6d4f\u89c8\u5668\u7f13\u5b58\u4e2d\u7684\u5185\u5bb9\u548c\u670d\u52a1\u5668\u4e2d\u7684\u539f\u59cb\u5185\u5bb9\u662f\u5426\u5339\u914d\u7684\u4e00\u79cd\u673a\u5236\uff08\u201c\u5b9e\u4f53\u201d\u5c31\u662f\u6240\u8bf4\u7684\u201c\u5185\u5bb9\u201d\uff0c\u5305\u62ec\u56fe\u7247\u3001\u811a\u672c\u3001\u6837\u5f0f\u8868\u7b49\uff09\u3002\u589e\u52a0ETag\u4e3a\u5b9e\u4f53\u7684\u9a8c\u8bc1\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6bd4\u4f7f\u7528\u201clast-modified date\uff08\u4e0a\u6b21\u7f16\u8f91\u65f6\u95f4\uff09\u201d\u66f4\u52a0\u7075\u6d3b\u7684\u673a\u5236\u3002Etag\u662f\u4e00\u4e2a\u8bc6\u522b\u5185\u5bb9\u7248\u672c\u53f7\u7684\u552f\u4e00\u5b57\u7b26\u4e32\u3002\u552f\u4e00\u7684\u683c\u5f0f\u9650\u5236\u5c31\u662f\u5b83\u5fc5\u987b\u5305\u542b\u5728\u53cc\u5f15\u53f7\u5185\u3002\u539f\u59cb\u670d\u52a1\u5668\u901a\u8fc7\u542b\u6709ETag\u6587\u4ef6\u5934\u7684\u54cd\u5e94\u6307\u5b9a\u9875\u9762\u5185\u5bb9\u7684ETag\u3002
\nHTTP\/1.1 200 OK
\nLast-Modified: Tue, 12 Dec 2006 03:03:59 GMT
\nETag: “10c24bc-4ab-457e1c1f”
\nContent-Length: 12195
\n\u7a0d\u540e\uff0c\u5982\u679c\u6d4f\u89c8\u5668\u8981\u9a8c\u8bc1\u4e00\u4e2a\u6587\u4ef6\uff0c\u5b83\u4f1a\u4f7f\u7528If-None-Match\u6587\u4ef6\u5934\u6765\u628aETag\u4f20\u56de\u7ed9\u539f\u59cb\u670d\u52a1\u5668\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5982\u679cETag\u5339\u914d\uff0c\u5c31\u4f1a\u8fd4\u56de\u4e00\u4e2a304\u72b6\u6001\u7801\uff0c\u8fd9\u5c31\u8282\u7701\u4e8612195\u5b57\u8282\u7684\u54cd\u5e94\u3002 GET \/i\/yahoo.gif HTTP\/1.1
\nHost: us.yimg.com
\nIf-Modified-Since: Tue, 12 Dec 2006 03:03:59 GMT
\nIf-None-Match: “10c24bc-4ab-457e1c1f”
\nHTTP\/1.1 304 Not Modified
\nETag\u7684\u95ee\u9898\u5728\u4e8e\uff0c\u5b83\u662f\u6839\u636e\u53ef\u4ee5\u8fa8\u522b\u7f51\u7ad9\u6240\u5728\u7684\u670d\u52a1\u5668\u7684\u5177\u6709\u552f\u4e00\u6027\u7684\u5c5e\u6027\u6765\u751f\u6210\u7684\u3002\u5f53\u6d4f\u89c8\u5668\u4ece\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u83b7\u5f97\u9875\u9762\u5185\u5bb9\u540e\u5230\u53e6\u5916\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u8fdb\u884c\u9a8c\u8bc1\u65f6ETag\u5c31\u4f1a\u4e0d\u5339\u914d\uff0c\u8fd9\u79cd\u60c5\u51b5\u5bf9\u4e8e\u4f7f\u7528\u670d\u52a1\u5668\u7ec4\u548c\u5904\u7406\u8bf7\u6c42\u7684\u7f51\u7ad9\u6765\u8bf4\u662f\u975e\u5e38\u5e38\u89c1\u7684\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cApache\u548cIIS\u90fd\u4f1a\u628a\u6570\u636e\u5d4c\u5165ETag\u4e2d\uff0c\u8fd9\u4f1a\u663e\u8457\u51cf\u5c11\u591a\u670d\u52a1\u5668\u95f4\u7684\u6587\u4ef6\u9a8c\u8bc1\u51b2\u7a81\u3002
\nApache 1.3\u548c2.x\u4e2d\u7684ETag\u683c\u5f0f\u4e3ainode-size-timestamp\u3002\u5373\u4f7f\u67d0\u4e2a\u6587\u4ef6\u5728\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\u4f1a\u5904\u4e8e\u76f8\u540c\u7684\u76ee\u5f55\u4e0b\uff0c\u6587\u4ef6\u5927\u5c0f\u3001\u6743\u9650\u3001\u65f6\u95f4\u6233\u7b49\u90fd\u5b8c\u5168\u76f8\u540c\uff0c\u4f46\u662f\u5728\u4e0d\u540c\u670d\u52a1\u5668\u4e0a\u4ed6\u4eec\u7684\u5185\u7801\u4e5f\u662f\u4e0d\u540c\u7684\u3002
\nIIS 5.0\u548cIIS 6.0\u5904\u7406ETag\u7684\u673a\u5236\u76f8\u4f3c\u3002IIS\u4e2d\u7684ETag\u683c\u5f0f\u4e3aFiletimestamp:ChangeNumber\u3002\u7528ChangeNumber\u6765\u8ddf\u8e2aIIS\u914d\u7f6e\u7684\u6539\u53d8\u3002\u7f51\u7ad9\u6240\u7528\u7684\u4e0d\u540cIIS\u670d\u52a1\u5668\u95f4ChangeNumber\u4e5f\u4e0d\u76f8\u540c\u3002 \u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\u7684Apache\u548cIIS\u5373\u4f7f\u5bf9\u4e8e\u5b8c\u5168\u76f8\u540c\u7684\u5185\u5bb9\u4ea7\u751f\u7684ETag\u5728\u4e5f\u4e0d\u76f8\u540c\uff0c\u7528\u6237\u5e76\u4e0d\u4f1a\u63a5\u6536\u5230\u4e00\u4e2a\u5c0f\u800c\u5feb\u7684304\u54cd\u5e94\uff1b\u76f8\u53cd\u4ed6\u4eec\u4f1a\u63a5\u6536\u4e00\u4e2a\u6b63\u5e38\u7684200\u54cd\u5e94\u5e76\u4e0b\u8f7d\u5168\u90e8\u5185\u5bb9\u3002\u5982\u679c\u4f60\u7684\u7f51\u7ad9\u53ea\u653e\u5728\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\uff0c\u5c31\u4e0d\u4f1a\u5b58\u5728\u8fd9\u4e2a\u95ee\u9898\u3002\u4f46\u662f\u5982\u679c\u4f60\u7684\u7f51\u7ad9\u662f\u67b6\u8bbe\u5728\u591a\u4e2a\u670d\u52a1\u5668\u4e0a\uff0c\u5e76\u4e14\u4f7f\u7528Apache\u548cIIS\u4ea7\u751f\u9ed8\u8ba4\u7684ETag\u914d\u7f6e\uff0c\u4f60\u7684\u7528\u6237\u83b7\u5f97\u9875\u9762\u5c31\u4f1a\u76f8\u5bf9\u6162\u4e00\u70b9\uff0c\u670d\u52a1\u5668\u4f1a\u4f20\u8f93\u66f4\u591a\u7684\u5185\u5bb9\uff0c\u5360\u7528\u66f4\u591a\u7684\u5e26\u5bbd\uff0c\u4ee3\u7406\u4e5f\u4e0d\u4f1a\u6709\u6548\u5730\u7f13\u5b58\u4f60\u7684\u7f51\u7ad9\u5185\u5bb9\u3002\u5373\u4f7f\u4f60\u7684\u5185\u5bb9\u62e5\u6709Expires\u6587\u4ef6\u5934\uff0c\u65e0\u8bba\u7528\u6237\u4ec0\u4e48\u65f6\u5019\u70b9\u51fb\u201c\u5237\u65b0\u201d\u6216\u8005\u201c\u91cd\u8f7d\u201d\u6309\u94ae\u90fd\u4f1a\u53d1\u9001\u76f8\u5e94\u7684GET\u8bf7\u6c42\u3002
\n\u5982\u679c\u4f60\u6ca1\u6709\u4f7f\u7528ETag\u63d0\u4f9b\u7684\u7075\u6d3b\u7684\u9a8c\u8bc1\u6a21\u5f0f\uff0c\u90a3\u4e48\u5e72\u8106\u628a\u6240\u6709\u7684ETag\u90fd\u53bb\u6389\u4f1a\u66f4\u597d\u3002Last-Modified\u6587\u4ef6\u5934\u9a8c\u8bc1\u662f\u57fa\u4e8e\u5185\u5bb9\u7684\u65f6\u95f4\u6233\u7684\u3002\u53bb\u6389ETag\u6587\u4ef6\u5934\u4f1a\u51cf\u5c11\u54cd\u5e94\u548c\u4e0b\u6b21\u8bf7\u6c42\u4e2d\u6587\u4ef6\u7684\u5927\u5c0f\u3002\u5fae\u8f6f\u7684\u8fd9\u7bc7\u652f\u6301\u6587\u7a3f\u8bb2\u8ff0\u4e86\u5982\u4f55\u53bb\u6389ETag\u3002\u5728Apache\u4e2d\uff0c\u53ea\u9700\u8981\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u7b80\u5355\u6dfb\u52a0\u4e0b\u9762\u4e00\u884c\u4ee3\u7801\u5c31\u53ef\u4ee5\u4e86\uff1a
\nFileETag none<\/p>\n
15\u3001\u5c3d\u65e9\u5237\u65b0\u8f93\u51fa\u7f13\u51b2
\n\u5f53\u7528\u6237\u8bf7\u6c42\u4e00\u4e2a\u9875\u9762\u65f6\uff0c\u65e0\u8bba\u5982\u4f55\u90fd\u4f1a\u82b1\u8d39200\u5230500\u6beb\u79d2\u7528\u4e8e\u540e\u53f0\u7ec4\u7ec7HTML\u6587\u4ef6\u3002\u5728\u8fd9\u671f\u95f4\uff0c\u6d4f\u89c8\u5668\u4f1a\u4e00\u76f4\u7a7a\u95f2\u7b49\u5f85\u6570\u636e\u8fd4\u56de\u3002\u5728PHP\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528flush()\u65b9\u6cd5\uff0c\u5b83\u5141\u8bb8\u4f60\u628a\u5df2\u7ecf\u7f16\u8bd1\u7684\u597d\u7684\u90e8\u5206HTML\u54cd\u5e94\u6587\u4ef6\u5148\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668\uff0c\u8fd9\u65f6\u6d4f\u89c8\u5668\u5c31\u4f1a\u53ef\u4ee5\u4e0b\u8f7d\u6587\u4ef6\u4e2d\u7684\u5185\u5bb9\uff08\u811a\u672c\u7b49\uff09\u800c\u540e\u53f0\u540c\u65f6\u5904\u7406\u5269\u4f59\u7684HTML\u9875\u9762\u3002\u8fd9\u6837\u505a\u7684\u6548\u679c\u4f1a\u5728\u540e\u53f0\u70e6\u607c\u6216\u8005\u524d\u53f0\u8f83\u7a7a\u95f2\u65f6\u66f4\u52a0\u660e\u663e\u3002
\n\u8f93\u51fa\u7f13\u51b2\u5e94\u7528\u6700\u597d\u7684\u4e00\u4e2a\u5730\u65b9\u5c31\u662f\u7d27\u8ddf\u5728<head \/>\u4e4b\u540e\uff0c\u56e0\u4e3aHTML\u7684\u5934\u90e8\u5206\u5bb9\u6613\u751f\u6210\u800c\u4e14\u5934\u90e8\u5f80\u5f80\u5305\u542bCSS\u548cJavaScript\u6587\u4ef6\uff0c\u8fd9\u6837\u6d4f\u89c8\u5668\u5c31\u53ef\u4ee5\u5728\u540e\u53f0\u7f16\u8bd1\u5269\u4f59HTML\u7684\u540c\u65f6\u5e76\u884c\u4e0b\u8f7d\u5b83\u4eec\u3002 \u4f8b\u5b50\uff1a<\/p>\n
… <!– css, js –>
\n<\/head>
\n<?php flush(); ?>
\n<body>
\n… <!– content –><\/p>\n
\u4e3a\u4e86\u8bc1\u660e\u4f7f\u7528\u8fd9\u9879\u6280\u672f\u7684\u597d\u5904\uff0cYahoo!\u641c\u7d22\u7387\u5148\u7814\u7a76\u5e76\u5b8c\u6210\u4e86\u7528\u6237\u6d4b\u8bd5\u3002<\/p>\n
16\u3001\u4f7f\u7528GET\u6765\u5b8c\u6210AJAX\u8bf7\u6c42
\nYahoo!Mail\u56e2\u961f\u53d1\u73b0\uff0c\u5f53\u4f7f\u7528XMLHttpRequest\u65f6\uff0c\u6d4f\u89c8\u5668\u4e2d\u7684POST\u65b9\u6cd5\u662f\u4e00\u4e2a\u201c\u4e24\u6b65\u8d70\u201d\u7684\u8fc7\u7a0b\uff1a\u9996\u5148\u53d1\u9001\u6587\u4ef6\u5934\uff0c\u7136\u540e\u624d\u53d1\u9001\u6570\u636e\u3002\u56e0\u6b64\u4f7f\u7528GET\u6700\u4e3a\u6070\u5f53\uff0c\u56e0\u4e3a\u5b83\u53ea\u9700\u53d1\u9001\u4e00\u4e2aTCP\u5305\uff08\u9664\u975e\u4f60\u6709\u5f88\u591acookie\uff09\u3002IE\u4e2dURL\u7684\u6700\u5927\u957f\u5ea6\u4e3a2K\uff0c\u56e0\u6b64\u5982\u679c\u4f60\u8981\u53d1\u9001\u4e00\u4e2a\u8d85\u8fc72K\u7684\u6570\u636e\u65f6\u5c31\u4e0d\u80fd\u4f7f\u7528GET\u4e86\u3002
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17\u3001\u628a\u6837\u5f0f\u8868\u7f6e\u4e8e\u9876\u90e8
\n\u5728\u7814\u7a76Yahoo!\u7684\u6027\u80fd\u8868\u73b0\u65f6\uff0c\u6211\u4eec\u53d1\u73b0\u628a\u6837\u5f0f\u8868\u653e\u5230\u6587\u6863\u7684<head \/>\u5185\u90e8\u4f3c\u4e4e\u4f1a\u52a0\u5feb\u9875\u9762\u7684\u4e0b\u8f7d\u901f\u5ea6\u3002\u8fd9\u662f\u56e0\u4e3a\u628a\u6837\u5f0f\u8868\u653e\u5230<head \/>\u5185\u4f1a\u4f7f\u9875\u9762\u6709\u6b65\u9aa4\u7684\u52a0\u8f7d\u663e\u793a\u3002
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18\u3001\u907f\u514d\u4f7f\u7528CSS\u8868\u8fbe\u5f0f\uff08Expression\uff09
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19\u3001\u4f7f\u7528\u5916\u90e8JavaScript\u548cCSS
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20\u3001\u524a\u51cfJavaScript\u548cCSS
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21\u3001\u7528<link>\u4ee3\u66ff@import
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22\u3001\u907f\u514d\u4f7f\u7528\u6ee4\u955c
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23\u3001\u628a\u811a\u672c\u7f6e\u4e8e\u9875\u9762\u5e95\u90e8
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24\u3001\u5254\u9664\u91cd\u590d\u811a\u672c
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\n<?php insertScript(“menu.js”) ?>
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25\u3001\u51cf\u5c11DOM\u8bbf\u95ee
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26\u3001\u5f00\u53d1\u667a\u80fd\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f
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27\u3001\u51cf\u5c0fCookie\u4f53\u79ef
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\n28\u3001\u5bf9\u4e8e\u9875\u9762\u5185\u5bb9\u4f7f\u7528\u65e0coockie\u57df\u540d
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\n\u5982\u679c\u4f60\u7684\u57df\u540d\u662fwww.example.org\uff0c\u4f60\u53ef\u4ee5\u5728static.example.org\u4e0a\u5b58\u5728\u9759\u6001\u5185\u5bb9\u3002\u4f46\u662f\uff0c\u5982\u679c\u4f60\u4e0d\u662f\u5728www.example.org\u4e0a\u800c\u662f\u5728\u9876\u7ea7\u57df\u540dexample.org\u8bbe\u7f6e\u4e86coockie\uff0c\u90a3\u4e48\u6240\u6709\u5bf9\u4e8estatic.example.org\u7684\u8bf7\u6c42\u90fd\u5305\u542bcoockie\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f60\u53ef\u4ee5\u518d\u91cd\u65b0\u8d2d\u4e70\u4e00\u4e2a\u65b0\u7684\u57df\u540d\u6765\u5b58\u5728\u9759\u6001\u5185\u5bb9\uff0c\u5e76\u4e14\u8981\u4fdd\u6301\u8fd9\u4e2a\u57df\u540d\u662f\u65e0coockie\u7684\u3002Yahoo!\u4f7f\u7528\u7684\u662fymig.com\uff0cYouTube\u4f7f\u7528\u7684\u662fytimg.com\uff0cAmazon\u4f7f\u7528\u7684\u662fimages-anazon.com\u7b49\u7b49\u3002
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29\u3001\u4f18\u5316\u56fe\u50cf
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\u4f60\u53ef\u4ee5\u68c0\u67e5\u4e00\u4e0b\u4f60\u7684GIF\u56fe\u7247\u4e2d\u56fe\u50cf\u989c\u8272\u7684\u6570\u91cf\u662f\u5426\u548c\u8c03\u8272\u677f\u89c4\u683c\u4e00\u81f4\u3002 \u4f7f\u7528imagemagick\u4e2d\u4e0b\u9762\u7684\u547d\u4ee4\u884c\u5f88\u5bb9\u6613\u68c0\u67e5\uff1a
\nidentify -verbose image.gif
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\n\u5c1d\u8bd5\u628aGIF\u683c\u5f0f\u8f6c\u6362\u6210PNG\u683c\u5f0f\uff0c\u770b\u770b\u662f\u5426\u8282\u7701\u7a7a\u95f4\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u662f\u53ef\u4ee5\u538b\u7f29\u7684\u3002\u7531\u4e8e\u6d4f\u89c8\u5668\u652f\u6301\u6709\u9650\uff0c\u8bbe\u8ba1\u8005\u4eec\u5f80\u5f80\u4e0d\u592a\u4e50\u610f\u4f7f\u7528PNG\u683c\u5f0f\u7684\u56fe\u7247\uff0c\u4e0d\u8fc7\u8fd9\u90fd\u662f\u8fc7\u53bb\u7684\u4e8b\u60c5\u4e86\u3002\u73b0\u5728\u53ea\u6709\u4e00\u4e2a\u95ee\u9898\u5c31\u662f\u5728\u771f\u5f69PNG\u683c\u5f0f\u4e2d\u7684alpha\u901a\u9053\u534a\u900f\u660e\u95ee\u9898\uff0c\u4e0d\u8fc7\u540c\u6837\u7684\uff0cGIF\u4e5f\u4e0d\u662f\u771f\u5f69\u683c\u5f0f\u4e5f\u4e0d\u652f\u6301\u534a\u900f\u660e\u3002\u56e0\u6b64GIF\u80fd\u505a\u5230\u7684\uff0cPNG\uff08PNG8\uff09\u540c\u6837\u4e5f\u80fd\u505a\u5230\uff08\u9664\u4e86\u52a8\u753b\uff09\u3002\u4e0b\u9762\u8fd9\u6761\u7b80\u5355\u7684\u547d\u4ee4\u53ef\u4ee5\u5b89\u5168\u5730\u628aGIF\u683c\u5f0f\u8f6c\u6362\u4e3aPNG\u683c\u5f0f\uff1a
\nconvert image.gif image.png
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\n\u5728\u6240\u6709\u7684PNG\u56fe\u7247\u4e0a\u8fd0\u884cpngcrush\uff08\u6216\u8005\u5176\u5b83PNG\u4f18\u5316\u5de5\u5177\uff09\u3002\u4f8b\u5982\uff1a
\npngcrush image.png -rem alla -reduce -brute result.png
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\njpegtran -copy none -optimize -perfect src.jpg dest.jpg
\n30\u3001\u4f18\u5316CSS Spirite<\/p>\n
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\n\u4fbf\u4e8e\u79fb\u52a8\uff0c\u4e0d\u8981\u5728Spirite\u7684\u56fe\u50cf\u4e2d\u95f4\u7559\u6709\u8f83\u5927\u7a7a\u9699\u3002\u8fd9\u867d\u7136\u4e0d\u5927\u4f1a\u589e\u52a0\u6587\u4ef6\u5927\u5c0f\u4f46\u5bf9\u4e8e\u7528\u6237\u4ee3\u7406\u6765\u8bf4\u5b83\u9700\u8981\u66f4\u5c11\u7684\u5185\u5b58\u6765\u628a\u56fe\u7247\u89e3\u538b\u4e3a\u50cf\u7d20\u5730\u56fe\u3002100×100\u7684\u56fe\u7247\u4e3a1\u4e07\u50cf\u7d20\uff0c\u800c1000×1000\u5c31\u662f100\u4e07\u50cf\u7d20\u3002<\/p>\n
31\u3001\u4e0d\u8981\u5728HTML\u4e2d\u7f29\u653e\u56fe\u50cf
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\n<img width=”100″ height=”100″ src=”mycat.jpg” alt=”My Cat” \/>
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32\u3001favicon.ico\u8981\u5c0f\u800c\u4e14\u53ef\u7f13\u5b58
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33\u3001\u4fdd\u6301\u5355\u4e2a\u5185\u5bb9\u5c0f\u4e8e25K
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34\u3001\u6253\u5305\u7ec4\u4ef6\u6210\u590d\u5408\u6587\u672c
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