看新浪微博开放平台指南：http://open.weibo.com/wiki/%E5%BC%80%E5%8F%91%E6%B5%81%E7%A8%8B%E6%8A%80%E6%9C%AF%E8%A7%84%E8%8C%83%E4%B8%8E%E6%8C%87%E5%8D%97#.E7.94.B3.E8.AF.B7APPKEY
折腾github下载ruby的SDK
去http://rubyinstaller.org/downloads下载Devkit，了解了下这个东东是做嘛用的。https://github.com/oneclick/rubyinstaller/wiki/Development-Kit
按照指导中说的，运行gem install rdiscount --platform=ruby，还是遇到错误。
然后一顿折腾，在http://bbs.csdn.net/topics/380035447找到了原因，被墙了（刚在linkedin上看到开复李说他又回来了）。
后面直接不管，继续
1 C:\>gem install weibo_2 2 Temporarily enhancing PATH to include DevKit... 3 Building native extensions. This could take a while... 4 Fetching: rest-client-1.6.7.gem (100%) 5 Fetching: weibo_2-0.1.1.gem (100%) 6 Successfully installed json-1.7.7 7 Successfully installed rest-client-1.6.7 8 Successfully installed weibo_2-0.1.1 9 3 gems installed 10 Installing ri documentation for json-1.7.7... 11 Installing ri documentation for rest-client-1.6.7... 12 unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK 13 for README.rdoc, skipping 14 Installing ri documentation for weibo_2-0.1.1... 15 Installing RDoc documentation for json-1.7.7... 16 Installing RDoc documentation for rest-client-1.6.7... 17 unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK 18 for README.rdoc, skipping 19 Installing RDoc documentation for weibo_2-0.1.1...
gem list --local检查一遍，OK。时间不早了，剩下的明天再折腾吧。