用文本+ASP打造新聞發布系統/圖片上傳

來源:互聯網
上載者:User
上傳 <SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
Function GetUpload(FormData)
Dim DataStart,DivStr,DivLen,DataSize,FormFieldData
'分隔標誌串(+CRLF)
DivStr = LeftB(FormData,InStrB(FormData,str2bin(VbCrLf)) + 1)
'分隔標誌串長度
DivLen = LenB(DivStr)
PosOpenBoundary = InStrB(FormData,DivStr)
PosCloseBoundary = InStrB(PosOpenBoundary + 1,FormData,DivStr)
Set Fields = CreateObject("Scripting.Dictionary")

While PosOpenBoundary > 0 And PosCloseBoundary > 0
'name起始位置(name="xxxxx"),加6是因為[name="]長度為6
FieldNameStart = InStrB(PosOpenBoundary,FormData,str2bin("name=")) + 6
FieldNameSize = InStrB(FieldNameStart,FormData,ChrB(34)) - FieldNameStart '(")的ASC值=34
FormFieldName = bin2str(MidB(FormData,FieldNameStart,FieldNameSize))

'filename起始位置(filename="xxxxx")
FieldFileNameStart = InStrB(PosOpenBoundary,FormData,str2bin("filename=")) + 10
If FieldFileNameStart < PosCloseBoundary And FieldFileNameStart > PosopenBoundary Then
FieldFileNameSize = InStrB(FieldFileNameStart,FormData,ChrB(34)) - FieldFileNameStart '(")的ASC值=34
FormFileName = bin2str(MidB(FormData,FieldFileNameStart,FieldFileNameSize))
Else
FormFileName = ""
End If

'Content-Type起始位置(Content-Type: xxxxx)
FieldFileCTStart = InStrB(PosOpenBoundary,FormData,str2bin("Content-Type:")) + 14
If FieldFileCTStart < PosCloseBoundary And FieldFileCTStart > PosOpenBoundary Then
FieldFileCTSize = InStrB(FieldFileCTStart,FormData,str2bin(VbCrLf & VbCrLf)) - FieldFileCTStart
FormFileCT = bin2str(MidB(FormData,FieldFileCTStart,FieldFileCTSize))
Else
FormFileCT = ""
End If

'資料起始位置:2個CRLF開始
DataStart = InStrB(PosOpenBoundary,FormData,str2bin(VbCrLf & VbCrLf)) + 4
If FormFileName <> "" Then
'資料長度,減1是因為資料檔案的存取位元組數問題(可能是AppendChunk方法的問題):
'由於位元組數為奇數的圖象存到資料庫時會去掉最後一個字元導致圖象不能正確顯示,
'位元組數為偶數的資料檔案就不會出現這個問題,因此必須保持位元組數為偶數。
DataSize = InStrB(DataStart,FormData,DivStr) - DataStart - 1
FormFieldData = MidB(FormData,DataStart,DataSize)
Else
'資料長度,減2是因為分隔標誌串前有一個CRLF
DataSize = InStrB(DataStart,FormData,DivStr) - DataStart - 2
FormFieldData = bin2str(MidB(FormData,DataStart,DataSize))
End If

'建立一個Dictionary集儲存Form中各個Field的相關資料
Set Field = CreateUploadField()
Field.Name = FormFieldName
Field.FilePath = FormFileName
Field.FileName = GetFileName(FormFileName)
Field.ContentType = FormFileCT
Field.Length = LenB(FormFieldData)
Field.Value = FormFieldData

Fields.Add FormFieldName, Field

PosOpenBoundary = PosCloseBoundary
PosCloseBoundary = InStrB(PosOpenBoundary + 1,FormData,DivStr)
Wend
Set GetUpload = Fields
End Function

'把二進位字串轉換成一般字元串函數
Function bin2str(binstr)
Dim varlen,clow,ccc,skipflag
'中文字元Skip標誌
skipflag=0
ccc = ""
If Not IsNull(binstr) Then
varlen=LenB(binstr)
For i=1 To varlen
If skipflag=0 Then
clow = MidB(binstr,i,1)
'判斷是否中文的字元
If AscB(clow) > 127 Then
'AscW會把二進位的中文雙位元組字元高位和低位反轉,所以要先把中文的高低位反轉
ccc =ccc & Chr(AscW(MidB(binstr,i+1,1) & clow))
skipflag=1
Else
ccc = ccc & Chr(AscB(clow))
End If
Else
skipflag=0
End If
Next
End If
bin2str = ccc
End Function


'把一般字元串轉成二進位字串函數
Function str2bin(varstr)
str2bin=""
For i=1 To Len(varstr)
varchar=mid(varstr,i,1)
varasc = Asc(varchar)
' asc對中文字元求出來的值可能為負數,
' 加上65536就可求出它的無符號數值
' -1在機器內是用補碼錶示的0xffff,
' 其無符號值為65535,65535=-1+65536
' 其他負數依次類推。
If varasc<0 Then
varasc = varasc + 65535
End If
'對中文的處理:把雙位元組低位和高位分開
If varasc>255 Then
varlow = Left(Hex(Asc(varchar)),2)
varhigh = right(Hex(Asc(varchar)),2)
str2bin = str2bin & chrB("&H" & varlow) & chrB("&H" & varhigh)
Else
str2bin = str2bin & chrB(AscB(varchar))
End If
Next
End Function

'取得檔案名稱(去掉Path)
Function GetFileName(FullPath)
If FullPath <> "" Then
FullPath = StrReverse(FullPath)
FullPath = Left(FullPath, InStr(1, FullPath, "\") - 1)
GetFileName = StrReverse(FullPath)
Else
GetFileName = ""
End If
End Function
</SCRIPT>
<SC



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