liferay 文件下载失败

现象：

http://issues.liferay.com/browse/LPS-29645

原因
http://support.microsoft.com/default.aspx?scid=kb;en-us;316431

方法：
http://issues.liferay.com/browse/LPS-27419

https://github.com/brianchandotcom/liferay-portal/compare/ef4c809d02...0f667ee1e1

曾经做过的尝试：

1. ext 中 加 head filter （liferay-web.xml)
2. response.setHeader("Cache-Control","public, max-age=315360000");
   response.setHeader("Pragma", "public");

关于cache-control
http://www.cnblogs.com/cuixiping/archive/2008/05/04/1181056.html