Tornado is an open source version of the scalable, non-blocking web server and and tools that power FriendFeed. Documentation and downloads are available at http://www.tornadoweb.org/
Tornado is licensed under the Apache Licence, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0.html).
给tornado的StaticFileHandler增加partial range request处理。让其可以对html5 video/audio进行拖拽。
该版本在3.0b1版本上修改