之所以说该上传类不错是因为：
1、编码可定义，这样避免上传非英文路径和文件名的文件不会出现乱码；
2、数据分块读取，防止过度占用服务器CPU时间；
以下为源码：（Found it in KindEditor）
<%
'=========================================================
'类名: AnUpLoad(艾恩无组件上传类)
'作者: Anlige
'版本: 艾恩ASP无组件上传类V11.03.25
'开发日期: 2008-4-12
'修改日期: 2011-03025
'主页: http://dev.mo.cn
'Email: zhanghuiguoanlige@126.com
'QQ: 1034555083
'=========================================================
Dim StreamT
Class AnUpLoad
Private Form, Fils
Private vCharSet, vMaxSize, vSingleSize, vErr, vVersion, vTotalSize, vExe, pID, vOP, vErrExe,vboundary, vLostTime, vMode, vFileCount
'==============================
'设置和读取属性开始
'==============================
Public Property Let Mode(ByVal value)
vMode = value
End Property
Public Property Let MaxSize(ByVal value)
vMaxSize = value
End Property
Public Property Let SingleSize(ByVal value)
vSingleSize = value
End Property
Public Property Let Exe(ByVal value)
vExe = LCase(value)
End Property
Public Property Let CharSet(ByVal value)
vCharSet = value
End Property
Public Property Get ErrorID()
ErrorID = vErr
End Property
Public Property Get FileCount()
FileCount = Fils.count
End Property
Public Property Get Description()
Description = GetErr(vErr)
End Property
Public Property Get Version()
Version = vVersion
End Property
Public Property Get TotalSize()
TotalSize = vTotalSize
End Property
Public Property Get ProcessID()
ProcessID = pID
End Property
Public Property Let openProcesser(ByVal value)
vOP = value
End Property
Public Property Get LostTime()
LostTime = vLostTime
End Property
'==============================
'设置和读取属性结束，初始化类
'==============================
Private Sub Class_Initialize()
set Form = server.createobject("Scripting.Dictionary")
set Fils = server.createobject("Scripting.Dictionary")
Set StreamT = server.CreateObject("Adodb.stream")
vVersion = "艾恩ASP无组件上传类V10.10.22"
vMaxSize = -1
vSingleSize = -1
vErr = -1
vExe = ""
vTotalSize = 0
vCharSet = "utf-8"
vOP=false
pID="AnUpload"
setApp "",0,0,""
vMode = 0
End Sub
Private Sub Class_Terminate()
Dim f
Form.RemoveAll()
For each f in Fils
Fils(f).value=empty
Set Fils(f) = Nothing
Next
Fils.RemoveAll()
Set Form = Nothing
Set Fils = Nothing
StreamT.Close()
Set StreamT = Nothing
End Sub
'==============================
'函数名:GetData
'作用:处理客户端提交来的所有数据
'==============================
Public Sub GetData()
Dim time1
time1 = timer()
if vOP And trim(request.querystring("processid"))<>"" then pID=request.querystring("processid")
Dim value, str, bcrlf, fpos, sSplit, slen, istart,ef
Dim TotalBytes,tempdata,BytesRead,ChunkReadSize,PartSize,DataPart,formend, formhead, startpos, endpos, formname, FileName, fileExe, valueend, NewName,localname,type_1,contentType
TotalBytes = Request.TotalBytes
ef = false
If checkEntryType = false Then ef = true : vErr = 2
'下面3句注释掉了，因为在IIS5.0中，如果上传大小大于限制大小的文件，会出错，一直没找到解决方法。如果是在IIS5以上的版本使用，可以取消下面3句的注释
'If Not ef Then
'If vMaxSize > 0 And TotalBytes > vMaxSize Then ef = true : vErr = 1
'End If
If ef Then Exit Sub
If vMode = 0 Then
vTotalSize = 0
StreamT.Type = 1
StreamT.Mode = 3
StreamT.Open
BytesRead = 0
ChunkReadSize = 1024 * 16
Do While BytesRead < TotalBytes
PartSize = ChunkReadSize
If PartSize + BytesRead > TotalBytes Then PartSize = TotalBytes - BytesRead
DataPart = Request.BinaryRead(PartSize)
StreamT.Write DataPart
BytesRead = BytesRead + PartSize
setApp "uploading",TotalBytes,BytesRead,""
Loop
setApp "uploaded",TotalBytes,BytesRead,""
StreamT.Position = 0
tempdata = StreamT.Read
Else
tempdata = Request.BinaryRead(TotalBytes)
End If
bcrlf = ChrB(13) & ChrB(10)
fpos = InStrB(1, tempdata, bcrlf)
sSplit = MidB(tempdata, 1, fpos - 1)
slen = LenB(sSplit)
istart = slen + 2
Do
formend = InStrB(istart, tempdata, bcrlf & bcrlf)
formhead = MidB(tempdata, istart, formend - istart)
str = Bytes2Str(formhead)
startpos = InStr(str, "name=""") + 6
endpos = InStr(startpos, str, """")
formname = LCase(Mid(str, startpos, endpos - startpos))
valueend = InStrB(formend + 3, tempdata, sSplit)
If InStr(str, "filename=""") > 0 Then
startpos = InStr(str, "filename=""") + 10
endpos = InStr(startpos, str, """")
type_1=instr(endpos,lcase(str),"content-type")
contentType=trim(mid(str,type_1+13))
FileName = Mid(str, startpos, endpos - startpos)
If Trim(FileName) <> "" Then
LocalName = FileName
FileName = Replace(FileName, "/", "\")
FileName = Mid(FileName, InStrRev(FileName, "\") + 1)
If instr(FileName,".")>0 Then
fileExe = Split(FileName, ".")(UBound(Split(FileName, ".")))
else
fileExe = ""
End If
If vExe <> "" Then '判断扩展名
If checkExe(fileExe) = True Then
vErr = 3
vErrExe = fileExe
tempdata = empty
Exit Sub
End If
End If
NewName = Getname()
NewName = NewName & "." & fileExe
vTotalSize = vTotalSize + valueend - formend - 6
If vSingleSize > 0 And (valueend - formend - 6) > vSingleSize Then '判断上传单个文件大小
vErr = 5
tempdata = empty
Exit Sub
End If
If vMaxSize > 0 And vTotalSize > vMaxSize Then '判断上传数据总大小
vErr = 1
tempdata = empty
Exit Sub
End If
If Fils.Exists(formname) Then
vErr = 4
tempdata = empty
Exit Sub
Else
Dim fileCls:set fileCls= new UploadFileEx
fileCls.ContentType=contentType
fileCls.Size = (valueend - formend - 6)
fileCls.Position = (formend + 3)
fileCls.FormName = formname
fileCls.NewName = NewName
fileCls.FileName = FileName
fileCls.LocalName = FileName
fileCls.extend=split(NewName,".")(ubound(split(NewName,".")))
Fils.Add formname, fileCls
Set fileCls = Nothing
End If
End If
Else
value = MidB(tempdata, formend + 4, valueend - formend - 6)
If Form.Exists(formname) Then
Form(formname) = Form(formname) & "," & Bytes2Str(value)
Else
Form.Add formname, Bytes2Str(value)
End If
End If
istart = valueend + 2 + slen
Loop Until (istart + 2) >= LenB(tempdata)
vErr = 0
tempdata = empty
vLostTime = FormatNumber((timer-time1)*1000,2)
End Sub
Public sub setApp(stp,total,current,desc)
Application.lock()
Application(pID)="{ID:""" & pID & """,step:""" & stp & """,total:" & total & ",now:" & current & ",description:""" & desc & """,dt:""" & now() & """}"
Application.unlock()
end sub
'==============================
'判断扩展名
'==============================
Private Function checkExe(ByVal ex)
Dim notIn: notIn = True
If vExe="*" then
notIn=false
elseIf InStr(1, vExe, "|") > 0 Then
Dim tempExe: tempExe = Split(vExe, "|")
Dim I: I = 0
For I = 0 To UBound(tempExe)
If LCase(ex) = tempExe(I) Then
notIn = False
Exit For
End If
Next
Else
If vExe = LCase(ex) Then
notIn = False
End If
End If
checkExe = notIn
End Function
'==============================
'把数字转换为文件大小显示方式
'==============================
Public Function GetSize(ByVal Size)
If Size < 1024 Then
GetSize = FormatNumber(Size, 2) & "B"
ElseIf Size >= 1024 And Size < 1048576 Then
GetSize = FormatNumber(Size / 1024, 2) & "KB"
ElseIf Size >= 1048576 Then
GetSize = FormatNumber((Size / 1024) / 1024, 2) & "MB"
End If
End Function
'==============================
'二进制数据转换为字符
'==============================
Private Function Bytes2Str(ByVal byt)
If LenB(byt) = 0 Then
Bytes2Str = ""
Exit Function
End If
Dim mystream, bstr
Set mystream =server.createobject("ADODB.Stream")
mystream.Type = 2
mystream.Mode = 3
mystream.Open
mystream.WriteText byt
mystream.Position = 0
mystream.CharSet = vCharSet
mystream.Position = 2
bstr = mystream.ReadText()
mystream.Close
Set mystream = Nothing
Bytes2Str = bstr
End Function
'==============================
'获取错误描述
'==============================
Private Function GetErr(ByVal Num)
Select Case Num
Case 0
GetErr = "数据处理完毕!"
Case 1
GetErr = "上传数据超过" & GetSize(vMaxSize) & "限制!可设置MaxSize属性来改变限制!"
Case 2
GetErr = "未设置上传表单enctype属性为multipart/form-data或者未设置method属性为Post,上传无效!"
Case 3
GetErr = "含有非法扩展名(" & vErrExe & ")文件!只能上传扩展名为" & Replace(vExe, "|", ",") & "的文件"
Case 4
GetErr = "对不起,程序不允许使用相同name属性的文件域!"
Case 5
GetErr = "单个文件大小超出" & GetSize(vSingleSize) & "的上传限制!"
End Select
End Function
'==============================
'根据日期生成随机文件名
'==============================
Private Function Getname()
Dim y, m, d, h, mm, S, r
Randomize
y = Year(Now)
m = right("0" & Month(Now),2)
d = right("0" & Day(Now),2)
h = right("0" & Hour(Now),2)
mm =right("0" & Minute(Now),2)
S = right("0" & Second(Now),2)
r = 0
r = CInt(Rnd() * 10000)
S = right("0000" & r,4)
Getname = y & m & d & h & mm & S & r
End Function
'==============================
'检测上传类型是否为multipart/form-data
'==============================
Private Function checkEntryType()
Dim ContentType, ctArray, bArray,RequestMethod
RequestMethod=trim(LCase(Request.ServerVariables("REQUEST_METHOD")))
if RequestMethod="" or RequestMethod<>"post" then
checkEntryType = False
exit function
end if
ContentType = LCase(Request.ServerVariables("HTTP_CONTENT_TYPE"))
ctArray = Split(ContentType, ";")
if ubound(ctarray)>=0 then
If Trim(ctArray(0)) = "multipart/form-data" Then
checkEntryType = True
vboundary = Split(ContentType,"boundary=")(1)
Else
checkEntryType = False
End If
else
checkEntryType = False
end if
End Function
'==============================
'获取上传表单值,参数可选,如果为-1则返回一个包含所有表单项的一个dictionary对象
'==============================
Public Function Forms(ByVal formname)
If trim(formname) = "-1" Then
Set Forms = Form
Else
If Form.Exists(LCase(formname)) Then
Forms = Form(LCase(formname))
Else
Forms = ""
End If
End If
End Function
'==============================
'获取上传的文件类,参数可选,如果为-1则返回一个包含所有上传文件类的一个dictionary对象
'==============================
Public Function Files(ByVal formname)
If trim(formname) = "-1" Then
Set Files = Fils
Else
If Fils.Exists(LCase(formname)) Then
Set Files = Fils(LCase(formname))
Else
Set Files = Nothing
End If
End If
End Function
End Class
Class UploadFileEx
Private mvarFormName , mvarNewName , mvarLocalName , mvarFileName , mvarUserSetName , mvarContentType ,mException,mvarPosition
Private mvarSize , mvarValue , mvarPath , mvarExtend ,mvarWidth, mvarHeight
Public Property Let Extend(ByVal vData )
mvarExtend = vData
End Property
Public Property Get Extend()
Extend = mvarExtend
End Property
Public Property Get Width()
Width = mvarWidth
End Property
Public Property Get Height()
Height = mvarHeight
End Property
Public Property Let Path(ByVal vData )
mvarPath = vData
End Property
Public Property Get Path()
Path = mvarPath
End Property
Public Property Get Exception()
Exception = mException
End Property
Public Property Let Value(ByVal vData )
mvarValue = vData
End Property
Public Property Get Value()
Value = mvarValue
End Property
Public Property Let Size(ByVal vData )
mvarSize = vData
End Property
Public Property Get Size()
Size = mvarSize
End Property
Public Property Let Position(ByVal vData )
mvarPosition = vData
End Property
Public Property Get Position()
Size = mvarPosition
End Property
Public Property Let ContentType(ByVal vData )
mvarContentType = vData
End Property
Public Property Get ContentType()
ContentType = mvarContentType
End Property
Public Property Let UserSetName(ByVal vData )
mvarUserSetName = vData
End Property
Public Property Get UserSetName()
UserSetName = mvarUserSetName
End Property
Public Property Let FileName(ByVal vData )
mvarFileName = vData
End Property
Public Property Get FileName()
FileName = mvarFileName
End Property
Public Property Let LocalName(ByVal vData )
mvarLocalName = vData
End Property
Public Property Get LocalName()
LocalName = mvarLocalName
End Property
Public Property Let NewName(ByVal vData )
mvarNewName = vData
End Property
Public Property Get NewName()
NewName = mvarNewName
End Property
Public Property Let FormName(ByVal vData )
mvarFormName = vData
End Property
Public Property Get FormName()
FormName = mvarFormName
End Property
Private Sub Class_Initialize()
mvarSize =0
mvarWidth = 0
mvarHeight = 0
End Sub
Public Function SaveToFile(ByVal Path , byval tOption, byval OverWrite)
On Error Resume Next
Dim IsP
IsP = (InStr(Path, ":") = 2)
If Not IsP Then Path = Server.MapPath(Path)
Path = Replace(Path, "/", "\")
If Mid(Path, Len(Path) - 1) <> "\" Then Path = Path + "\"
CreateFolder Path
mvarPath = Path
If tOption = 1 Then
Path = Path & mvarLocalName: mvarFileName = mvarLocalName
Else
If tOption = -1 And mvarUserSetName <> "" Then
Path = Path & mvarUserSetName & "." & mvarExtend: mvarFileName = mvarUserSetName & "." & mvarExtend
Else
Path = Path & mvarNewName: mvarFileName = mvarNewName
End If
End If
If Not OverWrite Then
Path = GetFilePath()
End If
Dim tmpStrm
Set tmpStrm =server.CreateObject("ADODB.Stream")
tmpStrm.Mode = 3
tmpStrm.Type = 1
tmpStrm.Open
StreamT.Position = mvarPosition
StreamT.copyto tmpStrm,mvarSize
tmpStrm.SaveToFile Path, 2
tmpStrm.Close
Set tmpStrm = Nothing
If Not Err Then
Set SaveToFile = objFromJson("{error:false}")
Else
Set SaveToFile = objFromJson("{error:true,description:'" & replace(Err.Description,"'","\'") & "'}")
mException=Err.Description
End If
End Function
Public Function GetBytes()
StreamT.Position = mvarPosition
GetBytes = StreamT.read(mvarSize)
End Function
Private Function CreateFolder(ByVal folderPath )
Dim oFSO
Set oFSO = server.CreateObject("Scripting.FileSystemObject")
Dim sParent
sParent = oFSO.GetParentFolderName(folderPath)
If sParent = "" Then Exit Function
If Not oFSO.FolderExists(sParent) Then CreateFolder (sParent)
If Not oFSO.FolderExists(folderPath) Then oFSO.CreateFolder (folderPath)
Set oFSO = Nothing
End Function
Private Function GetFilePath()
Dim oFSO, Fname , FNameL , i
i = 0
Set oFSO = server.CreateObject("Scripting.FileSystemObject")
Fname = mvarPath & mvarFileName
FNameL = Mid(mvarFileName, 1, InStr(mvarFileName, ".") - 1)
Do While oFSO.FileExists(Fname)
Fname = mvarPath & FNameL & "(" & i & ")." & mvarExtend
mvarFileName = FNameL & "(" & i & ")." & mvarExtend
i = i + 1
Loop
Set oFSO = Nothing
GetFilePath = Fname
End Function
End Class
%>
<script language="jscript" runat="server">
function objFromJson(str){
eval("var _temp=(" + str + ");");
return _temp;
}
</script>