Como limitar o tamanho em KB de uma imagem
O sistema é desenvolvido em pure asp load ao que percebo.
Está funcionando perfeitamente, envia multiplos arquivos, mas eu quero limitar o tamanho de uma imagem por exemplo e não estou conseguindo. Gostaria muito de poder contar com a ajuda de vcs.
Vou colocar um pouco do código para análise!
<%
'*** File Upload to: images, Extensions: "GIF,JPG,JPEG,BMP,PNG", Form: NEWAD, Redirect: ""
'*** Pure ASP File Upload -----------------------------------------------------
Sub BuildUploadRequest(RequestBin)
'Get the boundary
PosBeg = 1
PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(13)))
if PosEnd = 0 then
Response.Write "<b>Form was submitted with no ENCTYPE=""multipart/form-data""</b><br>"
Response.Write "Please correct the form attributes and try again."
Response.End
end if
boundary = MidB(RequestBin,PosBeg,PosEnd-PosBeg)
boundaryPos = InstrB(1,RequestBin,boundary)
'Get all data inside the boundaries
Do until (boundaryPos=InstrB(RequestBin,boundary & getByteString("--")))
'Members variable of objects are put in a dictionary object
Dim UploadControl
Set UploadControl = CreateObject("Scripting.Dictionary")
'Get an object name
Pos = InstrB(BoundaryPos,RequestBin,getByteString("Content-Disposition"))
Pos = InstrB(Pos,RequestBin,getByteString("name="))
PosBeg = Pos+6
PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(34)))
Name = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
PosFile = InstrB(BoundaryPos,RequestBin,getByteString("filename="))
PosBound = InstrB(PosEnd,RequestBin,boundary)
'Test if object is of file type
If PosFile<>0 AND (PosFile<PosBound) Then
'Get Filename, content-type and content of file
PosBeg = PosFile + 10
PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(34)))
FileName = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
FileName = Mid(FileName,InStrRev(FileName,"\")+1)
'Add filename to dictionary object
UploadControl.Add "FileName", FileName
Pos = InstrB(PosEnd,RequestBin,getByteString("Content-Type:"))
PosBeg = Pos+14
PosEnd = InstrB(PosBeg,RequestBin,getByteString(chr(13)))
'Add content-type to dictionary object
ContentType = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
UploadControl.Add "ContentType",ContentType
'Get content of object
PosBeg = PosEnd+4
PosEnd = InstrB(PosBeg,RequestBin,boundary)-2
Value = FileName
ValueBeg = PosBeg-1
ValueLen = PosEnd-Posbeg
Else
'Get content of object
Pos = InstrB(Pos,RequestBin,getByteString(chr(13)))
PosBeg = Pos+4
PosEnd = InstrB(PosBeg,RequestBin,boundary)-2
Value = getString(MidB(RequestBin,PosBeg,PosEnd-PosBeg))
ValueBeg = 0
ValueEnd = 0
End If
'Add content to dictionary object
UploadControl.Add "Value" , Value
UploadControl.Add "ValueBeg" , ValueBeg
UploadControl.Add "ValueLen" , ValueLen
'Add dictionary object to main dictionary
UploadRequest.Add name, UploadControl
'Loop to next object
BoundaryPos=InstrB(BoundaryPos+LenB(boundary),RequestBin,boundary)
Loop
End Sub
'String to byte string conversion
Function getByteString(StringStr)
For i = 1 to Len(StringStr)
char = Mid(StringStr,i,1)
getByteString = getByteString & chrB(AscB(char))
Next
End Function
'Byte string to string conversion
Function getString(StringBin)
getString =""
For intCount = 1 to LenB(StringBin)
getString = getString & chr(AscB(MidB(StringBin,intCount,1)))
Next
End Function
Function UploadFormRequest(name)
on error resume next
if UploadRequest.Item(name) then
UploadFormRequest = UploadRequest.Item(name).Item("Value")
end if
End Function
'Process the upload
UploadQueryString = Replace(Request.QueryString,"GP_upload=true","")
if mid(UploadQueryString,1,1) = "&" then
UploadQueryString = Mid(UploadQueryString,2)
end if
GP_uploadAction = CStr(Request.ServerVariables("URL")) & "?GP_upload=true"
If (Request.QueryString <> "") Then
if UploadQueryString <> "" then
GP_uploadAction = GP_uploadAction & "&" & UploadQueryString
end if
End If
If (CStr(Request.QueryString("GP_upload")) <> "") Then
GP_redirectPage = ""
If (GP_redirectPage = "") Then
GP_redirectPage = CStr(Request.ServerVariables("URL"))
end if
RequestBin = Request.BinaryRead(Request.TotalBytes)
Dim UploadRequest
Set UploadRequest = CreateObject("Scripting.Dictionary")
BuildUploadRequest RequestBin
GP_keys = UploadRequest.Keys
for GP_i = 0 to UploadRequest.Count - 1
GP_curKey = GP_keys(GP_i)
'Save all uploaded files
if UploadRequest.Item(GP_curKey).Item("FileName") <> "" then
GP_value = UploadRequest.Item(GP_curKey).Item("Value")
GP_valueBeg = UploadRequest.Item(GP_curKey).Item("ValueBeg")
GP_valueLen = UploadRequest.Item(GP_curKey).Item("ValueLen")
if GP_valueLen = 0 then
Response.Write "<B>An error has occured saving uploaded file!</B><br><br>"
Response.Write "Filename: " & Trim(GP_curPath) & UploadRequest.Item(GP_curKey).Item("FileName") & "<br>"
Response.Write "File does not exists or is empty.<br>"
Response.Write "Please correct and <A HREF=""javascript:history.back(1)"">try again</a>"
response.End
end if
'Create a Stream instance
Dim GP_strm1, GP_strm2
Set GP_strm1 = Server.CreateObject("ADODB.Stream")
Set GP_strm2 = Server.CreateObject("ADODB.Stream")
'Open the stream
GP_strm1.Open
GP_strm1.Type = 1 'Binary
GP_strm2.Open
GP_strm2.Type = 1 'Binary
GP_strm1.Write RequestBin
GP_strm1.Position = GP_ValueBeg
GP_strm1.CopyTo GP_strm2,GP_ValueLen
'Create and Write to a File
GP_curPath = Request.ServerVariables("PATH_INFO")
GP_curPath = Trim(Mid(GP_curPath,1,InStrRev(GP_curPath,"/")) & "images")
if Mid(GP_curPath,Len(GP_curPath),1) <> "/" then
GP_curPath = GP_curPath & "/"
end if
on error resume next
GP_strm2.SaveToFile Trim(Server.mappath(GP_curPath))& "\" & UploadRequest.Item(GP_curKey).Item("FileName"),2
if err then
Response.Write "<B>An error has occured saving uploaded file!</B><br><br>"
Response.Write "Filename: " & Trim(GP_curPath) & UploadRequest.Item(GP_curKey).Item("FileName") & "<br>"
Response.Write "Maybe the destination directory does not exist, or you don't have write permission.<br>"
Response.Write "Please correct and <A HREF=""javascript:history.back(1)"">try again</a>"
err.clear
response.End
end if
end if
next
'*** GP NO REDIRECT
end if
if UploadQueryString <> "" then
UploadQueryString = UploadQueryString & "&GP_upload=true"
else
UploadQueryString = "GP_upload=true"
end if
%>
<%
' *** Edit Operations: (Modified for File Upload) declare variables
MM_editAction = CStr(Request.ServerVariables("URL")) 'MM_editAction = CStr(Request("URL"))
If (UploadQueryString <> "") Then
MM_editAction = MM_editAction & "?" & UploadQueryString
End If
' boolean to abort record edit
MM_abortEdit = false
' query string to execute
MM_editQuery = ""
%>
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