getFileSize 获得文件大小

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<%
    ' Copyright (c) 2009,reusablecode.blogspot.com; some rights reserved.
    '
    ' This work is licensed under the Creative Commons Attribution License. To view
    ' send a letter to Creative Commons,559 Nathan Abbott Way,Stanford,California
    ' 94305,USA.
    
    ' Retrieve the file size of a given file.
    function getFileSize(someFile)
        dim fs
        dim file
        
        set fs = Server.CreateObject("Scripting.FileSystemObject")
        set file = fs.GetFile(Server.MapPath(someFile))
        
        getFileSize = FormatFileSize(file.size)
        set file = nothing
        set fs = nothing
    end function
    
    ' Format a file size in the most practical units.
    ' Input: size in bytes
    function FormatFileSize(size)
        dim units
        dim factor
        
        units = Array("B","kB","MB","GB","TB","PB","EB","ZB","YB")
        factor = log(size)  7
        
        FormatFileSize = Round(size / (1024 ^ factor),2) & units(factor)
    end function
%>

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