一个asp无组件上传的实例

<%
‘’判断是否添加了文件
Dim ulFileName, ulResult

ulSaveToPath="/upload" ‘’保存文件路径
ulMaxFileSize = 1000000 ‘’文件大小限制 1000,000

ulResult = DoUploadFile(ulMaxFileSize, ulFileName)

Function DoUploadFile(MaxUpLoadSize, FileName)
Dim Upload, File, formName, formPath, FileExt
FileName = ""
Set Upload = New upload_yfly ‘’建立上传对象

IF IsNull(Upload.File) THEN
DoUploadFile= 6
EXIT Function
END IF

IF Upload.File.Count = 0 Then
DoUploadFile= 5 ‘’No File uploaded
Else
Set File = Upload.File("ulFileToUpload")
If File.FileName = "" Then
DoUploadFile= 4 ‘’No File uploaded
Else
‘’上传文件不是空的时候处理上传
‘’在目录后加(/)
formPath=upload.Form("ulSaveFilePath")

If Right(formPath, 1) <> "/" Then
formPath = formPath & "/"
End If

If File.FileSize < 100 Then
DoUploadFile= 1 ‘’文件大小太小
Exit Function
End If

If File.FileSize > MaxUpLoadSize Then
DoUploadFile= 2 ‘’文件大小超过了限制
Exit Function
End If

FileExt = LCase(Right(File.FileName, 4))
uploadsuc = False

If Not (FileExt = ".gif" Or FileExt = ".jpg") Then
DoUploadFile= 3 ‘’文件格式不正确
Exit Function
End If

Randomize
ranNum = Int(90000 * Rnd) + 10000
‘’文件名
FileName = formPath & Year(Now) & Month(Now) & Day(Now) & Hour(Now) & Minute(Now) & Second(Now) & ranNum & FileExt

If File.FileSize > 0 Then ‘’‘’如果 FileSize > 0 说明有文件数据
File.SaveAs server.mappath(FileName) ‘’‘’保存文件
End If
DoUploadFile= 0
End If
Set File = Nothing
End If
Set Upload = Nothing ‘’删除此对象
End Function

%>


<SCRIPT RUNAT="SERVER" LANGUAGE="VBSCRIPT">

dim upfile_yfly_Stream

Class upload_yfly

dim Form,File,Version

Private Sub Class_Initialize
dim iStart,iFileNameStart,iFileNameEnd,iEnd,vbEnter,iFormStart,iFormEnd,theFile
dim strDiv,mFormName,mFormValue,mFileName,mFileSize,mFilePath,iDivLen,mStr
Version=""
File = NULL
Form = Null
upfile_yfly_Stream=NULL
if Request.TotalBytes<1 then Exit Sub
set Form=CreateObject("Scripting.Dictionary")
set File=CreateObject("Scripting.Dictionary")
set upfile_yfly_Stream=CreateObject("Adodb.Stream")
upfile_yfly_Stream.mode=3
upfile_yfly_Stream.type=1
upfile_yfly_Stream.open
upfile_yfly_Stream.write Request.BinaryRead(Request.TotalBytes)

vbEnter=Chr(13)&Chr(10)
iDivLen=inString(1,vbEnter)+1
strDiv=subString(1,iDivLen)
iFormStart=iDivLen
iFormEnd=inString(iformStart,strDiv)-1
while iFormStart < iFormEnd
iStart=inString(iFormStart,"name=""")
iEnd=inString(iStart+6,"""")
mFormName=subString(iStart+6,iEnd-iStart-6)
iFileNameStart=inString(iEnd+1,"filename=""")
if iFileNameStart>0 and iFileNameStart<iFormEnd then
iFileNameEnd=inString(iFileNameStart+10,"""")
mFileName=subString(iFileNameStart+10,iFileNameEnd-iFileNameStart-10)
iStart=inString(iFileNameEnd+1,vbEnter&vbEnter)
iEnd=inString(iStart+4,vbEnter&strDiv)
if iEnd>iStart then
mFileSize=iEnd-iStart-4
else
mFileSize=0
end if
set theFile=new FileInfo
theFile.FileName=getFileName(mFileName)
theFile.FilePath=getFilePath(mFileName)
theFile.FileSize=mFileSize
theFile.FileStart=iStart+4
theFile.FormName=FormName
file.add mFormName,theFile
else
iStart=inString(iEnd+1,vbEnter&vbEnter)
iEnd=inString(iStart+4,vbEnter&strDiv)

if iEnd>iStart then
mFormValue=subString(iStart+4,iEnd-iStart-4)
else
mFormValue=""
end if
form.Add mFormName,mFormValue
end if

iFormStart=iformEnd+iDivLen
iFormEnd=inString(iformStart,strDiv)-1
wend
End Sub

Private Function subString(theStart,theLen)
dim i,c,stemp
upfile_yfly_Stream.Position=theStart-1
stemp=""
for i=1 to theLen
if upfile_yfly_Stream.EOS then Exit for
c=ascB(upfile_yfly_Stream.Read(1))
If c > 127 Then
if upfile_yfly_Stream.EOS then Exit for
stemp=stemp&Chr(AscW(ChrB(AscB(upfile_yfly_Stream.Read(1)))&ChrB(c)))
i=i+1
else
stemp=stemp&Chr(c)
End If
Next
subString=stemp
End function

Private Function inString(theStart,varStr)
dim i,j,bt,theLen,str
InString=0
Str=toByte(varStr)
theLen=LenB(Str)
for i=theStart to upfile_yfly_Stream.Size-theLen
if i>upfile_yfly_Stream.size then exit Function
upfile_yfly_Stream.Position=i-1
if AscB(upfile_yfly_Stream.Read(1))=AscB(midB(Str,1)) then
InString=i
for j=2 to theLen
if upfile_yfly_Stream.EOS then
inString=0
Exit for
end if
if AscB(upfile_yfly_Stream.Read(1))<>AscB(MidB(Str,j,1)) then
InString=0
Exit For
end if
next
if InString<>0 then Exit Function
end if
next
End Function

Private Sub Class_Terminate
if not isNull(Form) then
form.RemoveAll
set form=nothing
end if
if not isNull(File) then
file.RemoveAll
set file=nothing
end if
if not isNull(upfile_yfly_Stream) then
upfile_yfly_Stream.close
set upfile_yfly_Stream=nothing
end if
End Sub


Private function GetFilePath(FullPath)
If FullPath <> "" Then
GetFilePath = left(FullPath,InStrRev(FullPath, "\"))
Else
GetFilePath = ""
End If
End function

Private function GetFileName(FullPath)
If FullPath <> "" Then
GetFileName = mid(FullPath,InStrRev(FullPath, "\")+1)
Else
GetFileName = ""
End If
End function

Private function toByte(Str)
dim i,iCode,c,iLow,iHigh
toByte=""
For i=1 To Len(Str)
c=mid(Str,i,1)
iCode =Asc(c)
If iCode<0 Then iCode = iCode + 65535
If iCode>255 Then
iLow = Left(Hex(Asc(c)),2)
iHigh =Right(Hex(Asc(c)),2)
toByte = toByte & chrB("&H"&iLow) & chrB("&H"&iHigh)
Else
toByte = toByte & chrB(AscB(c))
End If
Next
End function
End Class


Class FileInfo
dim FormName,FileName,FilePath,FileSize,FileStart
Private Sub Class_Initialize
FileName = ""
FilePath = ""
FileSize = 0
FileStart= 0
FormName = ""
End Sub

Public function SaveAs(FullPath)
dim dr,ErrorChar,i
SaveAs=1
if trim(fullpath)="" or FileSize=0 or FileStart=0 or FileName="" then exit function
if FileStart=0 or right(fullpath,1)="/" then exit function
set dr=CreateObject("Adodb.Stream")
dr.Mode=3
dr.Type=1
dr.Open
upfile_yfly_Stream.position=FileStart-1
upfile_yfly_Stream.copyto dr,FileSize
dr.SaveToFile FullPath,2
dr.Close
set dr=nothing
SaveAs=0
end function
End Class
</SCRIPT>

原文转自：http://www.ltesting.net