speedtest.net/mini.php这里有个SpeedTest：网络宽带速度测试软件工具可以下载。解包后，将index-php.html命名成index.php就可以测试了： http://www.chedong.com/speedtest/，感兴趣的话请运行一下，并通过留言告诉我你的所在地，ISP服务商（电信/网通，拨号还是ADSL）和测试的下载/上传速度数值，谢谢。

日志记录： 202.165.107.100 - - [04/Nov/2007:19:55:56 +0800] “GET /speedtest/speedtest/random350x350.jpg?x=1194177282218 HTTP/1.1” 200 245388 “-” “Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9” 202.165.107.100.81561184209038542 202.165.107.100 - - [04/Nov/2007:19:55:58 +0800] “GET /speedtest/speedtest/random350x350.jpg?x=1194177284843 HTTP/1.1” 200 245388 “-” “Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9” 202.165.107.100.81561184209038542 202.165.107.100 - - [04/Nov/2007:19:55:59 +0800] “POST /speedtest/speedtest/upload.php HTTP/1.1” 200 23 “http://www.chedong.com/speedtest/speedtest.swf?v=1.0" “Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9” 202.165.107.100.81561184209038542 202.165.107.100 - - [04/Nov/2007:19:56:02 +0800] “POST /speedtest/speedtest/upload.php HTTP/1.1” 200 24 “http://www.chedong.com/speedtest/speedtest.swf?v=1.0" “Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9” 202.165.107.100.81561184209038542

基本原理就是下载一个大图片（加了时间戳防止服务器缓存），然后计算下载速率。然后在POST 2个请求给upload.php，计算上传速率（截取日志的时候，upload.php已经被缓存了，所以上传速率比下载的还大）；