目录常用包os与I/O操作相关包常用文件/目录操作路径拼接创建http://www.devze.com文件（touch）获取文件信息读取文件内容写入文件内容常用包
I am using HttpContext object implemented in HttpHandler child to download a file, when I have non-ascii characters in file name it looks weird in IE whereas it looks fine in Firefox.
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