发信人: nightcat()
整理人: qcrsoft(2002-05-13 16:33:05), 站内信件
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下面将介绍一系列可以不用组件，而使用纯粹的ASP代码来上传文件
呵呵，我想这将给很多拥有个人主页的网友带来极大的方便。
这个纯ASP代码由三个包含文件组成，代码中只使用了FileSystemObject
和Direction两个ASP固有对象。而不需要任何附加的组件，注意，为了保证
这段代码的出处，我没有对代码中的任何地方进行过修改。
希望能够对大家有所帮助：
文件fupload.inc
<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
'Sample multiple binary files upload via ASP - upload include
'c1997-1999 Antonin Foller, PSTRUH Software, http://www.pstruh.cz
'The file is part of ScriptUtilities library
'The file enables http upload to ASP without any components.
'But there is a small problem - ASP does not allow save binary data to
the disk.
' So you can use the upload for :
' 1. Upload small text (or HTML) files to server-side disk (Save the d
ata by filesystem object)
' 2. Upload binary/text files of any size to server-side database (RS(
"BinField") = Upload("FormField").Value
'Limit of upload size
Dim UploadSizeLimit
'********************************** GetUpload ************************
**********
'This function reads all form fields from binary input and returns it
as a dictionary object.
'The dictionary object containing form fields. Each form field is repr
esented by six values :
'.Name name of the form field (<Input Name="..." Type="File,...">)
'.ContentDisposition = Content-Disposition of the form field
'.FileName = Source file name for <input type=file>
'.ContentType = Content-Type for <input type=file>
'.Value = Binary value of the source field.
'.Length = Len of the binary data field
Function GetUpload()
Dim Result
Set Result = Nothing
If Request.ServerVariables("REQUEST_METHOD") = "POST" Then 'Request
method must be "POST"
Dim CT, PosB, Boundary, Length, PosE
CT = Request.ServerVariables("HTTP_Content_Type") 'reads Content-T
ype header
If LCase(Left(CT, 19)) = "multipart/form-data" Then 'Content-Type
header must be "multipart/form-data"
'This is upload request.
'Get the boundary and length from Content-Type header
PosB = InStr(LCase(CT), "boundary=") 'Finds boundary
If PosB > 0 Then Boundary = Mid(CT, PosB + 9) 'Separetes boundar
y
Length = CLng(Request.ServerVariables("HTTP_Content_Length")) 'G
et Content-Length header
if "" & UploadSizeLimit<>"" then
UploadSizeLimit = clng(UploadSizeLimit)
if Length > UploadSizeLimit then
' on error resume next 'Clears the input buffer
' response.AddHeader "Connection", "Close"
' on error goto 0
Request.BinaryRead(Length)
Err.Raise 2, "GetUpload", "Upload size " & FormatNumber(Leng
th,0) & "B exceeds limit of " & FormatNumber(UploadSizeLimit,0) & "B"
exit function
end if
end if
If Length > 0 And Boundary <> "" Then 'Are there required inform
ations about upload ?
Boundary = "--" & Boundary
Dim Head, Binary
Binary = Request.BinaryRead(Length) 'Reads binary data from cl
ient
'Retrieves the upload fields from binary data
Set Result = SeparateFields(Binary, Boundary)
Binary = Empty 'Clear variables
Else
Err.Raise 10, "GetUpload", "Zero length request ."
End If
Else
Err.Raise 11, "GetUpload", "No file sent."
End If
Else
Err.Raise 1, "GetUpload", "Bad request method."
End If
Set GetUpload = Result
End Function
'********************************** SeparateFields *******************
***************
'This function retrieves the upload fields from binary data and retuns
the fields as array
'Binary is safearray of all raw binary data from input.
Function SeparateFields(Binary, Boundary)
Dim PosOpenBoundary, PosCloseBoundary, PosEndOfHeader, isLastBoundar
y
Dim Fields
Boundary = StringToBinary(Boundary)
PosOpenBoundary = InstrB(Binary, Boundary)
PosCloseBoundary = InstrB(PosOpenBoundary + LenB(Boundary), Binary
, Boundary, 0)
Set Fields = CreateObject("Scripting.Dictionary")
Do While (PosOpenBoundary > 0 And PosCloseBoundary > 0 And Not isLas
tBoundary)
'Header and file/source field data
Dim HeaderContent, FieldContent
'Header fields
Dim Content_Disposition, FormFieldName, SourceFileName, Content_Ty
pe
'Helping variables
Dim Field, TwoCharsAfterEndBoundary
'Get end of header
PosEndOfHeader = InstrB(PosOpenBoundary + Len(Boundary), Binar
y, StringToBinary(vbCrLf + vbCrLf))
'Separates field header
HeaderContent = MidB(Binary, PosOpenBoundary + LenB(Boundary)
+ 2, PosEndOfHeader - PosOpenBoundary - LenB(Boundary) - 2)
'Separates field content
FieldContent = MidB(Binary, (PosEndOfHeader + 4), PosCloseBoun
dary - (PosEndOfHeader + 4) - 2)
'Separates header fields from header
GetHeadFields BinaryToString(HeaderContent), Content_Disposition,
FormFieldName, SourceFileName, Content_Type
'Create one field and assign parameters
Set Field = CreateUploadField()
Field.Name = FormFieldName
Field.ContentDisposition = Content_Disposition
Field.FilePath = SourceFileName
Field.FileName = GetFileName(SourceFileName)
Field.ContentType = Content_Type
Field.Value = FieldContent
Field.Length = LenB(FieldContent)
Fields.Add FormFieldName, Field
'Is this ending boundary ?
TwoCharsAfterEndBoundary = BinaryToString(MidB(Binary, PosCloseBou
ndary + LenB(Boundary), 2))
'Binary.Mid(PosCloseBoundary + Len(Boundary), 2).String
isLastBoundary = TwoCharsAfterEndBoundary = "--"
If Not isLastBoundary Then 'This is not ending boundary - go to ne
xt form field.
PosOpenBoundary = PosCloseBoundary
PosCloseBoundary = InStrB(PosOpenBoundary + LenB(Boundary)
, Binary, Boundary )
End If
Loop
Set SeparateFields = Fields
End Function
'********************************** Utilities ************************
**********
Function BinaryToString(Binary)
Dim I, S
For I=1 to LenB(Binary)
S = S & Chr(AscB(MidB(Binary,I,1)))
Next
BinaryToString = S
End Function
Function StringToBinary(String)
Dim I, B
For I=1 to len(String)
B = B & ChrB(Asc(Mid(String,I,1)))
Next
StringToBinary = B
End Function
'Separates header fields from upload header
Function GetHeadFields(ByVal Head, Content_Disposition, Name, FileName
, Content_Type)
Content_Disposition = LTrim(SeparateField(Head, "content-disposition
:", ";"))
Name = (SeparateField(Head, "name=", ";")) 'ltrim
If Left(Name, 1) = """" Then Name = Mid(Name, 2, Len(Name) - 2)
FileName = (SeparateField(Head, "filename=", ";")) 'ltrim
If Left(FileName, 1) = """" Then FileName = Mid(FileName, 2, Len(Fil
eName) - 2)
Content_Type = LTrim(SeparateField(Head, "content-type:", ";"))
End Function
'Separets one filed between sStart and sEnd
Function SeparateField(From, ByVal sStart, ByVal sEnd)
Dim PosB, PosE, sFrom
sFrom = LCase(From)
PosB = InStr(sFrom, sStart)
If PosB > 0 Then
PosB = PosB + Len(sStart)
PosE = InStr(PosB, sFrom, sEnd)
If PosE = 0 Then PosE = InStr(PosB, sFrom, vbCrLf)
If PosE = 0 Then PosE = Len(sFrom) + 1
SeparateField = Mid(From, PosB, PosE - PosB)
Else
SeparateField = Empty
End If
End Function
'Separetes file name from the full path of file
Function GetFileName(FullPath)
Dim Pos, PosF
PosF = 0
For Pos = Len(FullPath) To 1 Step -1
Select Case Mid(FullPath, Pos, 1)
Case "/", "\": PosF = Pos + 1: Pos = 0
End Select
Next
If PosF = 0 Then PosF = 1
GetFileName = Mid(FullPath, PosF)
End Function
</SCRIPT>
<SCRIPT RUNAT=SERVER LANGUAGE=JSCRIPT>
//The function creates Field object.
function CreateUploadField(){ return new uf_Init() }
function uf_Init(){
this.Name = null
this.ContentDisposition = null
this.FileName = null
this.FilePath = null
this.ContentType = null
this.Value = null
this.Length = null
}
</SCRIPT>
文件futils.inc
<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
'True PureASP upload - enables save of uploaded text fields to the dis
k.
'c1997-1999 Antonin Foller, PSTRUH Software, http://www.pstruh.cz
'The file is part of ScriptUtilities library
'The file enables http upload to ASP without any components.
'But there is a small problem - ASP does not allow save binary data to
the disk.
' So you can use the upload for :
' 1. Upload small text (or HTML) files to server-side disk (Save the d
ata by filesystem object)
' 2. Upload binary/text files of any size to server-side database (RS(
"BinField") = Upload("FormField").Value
'All uploaded files and log file will be saved to the next folder :
Dim LogFolder
LogFolder = Server.MapPath(".")
'********************************** SaveUpload ***********************
***********
'This function creates folder and saves contents of the source fields
to the disk.
'The fields are saved as files with names of form-field names.
'Also writes one line to the log file with basic informations about up
load.
Function SaveUpload(Fields, DestinationFolder, LogFolder)
if DestinationFolder = "" then DestinationFolder = Server.MapPath(".
")
Dim UploadNumber, OutFileName, FS, OutFolder, TimeName, Field
Dim LogLine, pLogLine, OutLine
'Create unique upload folder
Application.Lock
if Application("UploadNumber") = "" then
Application("UploadNumber") = 1
else
Application("UploadNumber") = Application("UploadNumber") + 1
end if
UploadNumber = Application("UploadNumber")
Application.UnLock
TimeName = Right("0" & Year(Now), 2) & Right("0" & Month(Now), 2) &
Right("0" & Day(Now), 2) & "_" & Right("0" & Hour(Now), 2) & Right("0"
& Minute(Now), 2) & Right("0" & Second(Now), 2) & "-" & UploadNumber
Set FS = CreateObject("Scripting.FileSystemObject")
Set OutFolder = FS.CreateFolder(DestinationFolder + "\" + TimeName)
Dim TextStream
'Save the uploaded fields and create log line
For Each Field In Fields.Items
'Write content of the field to the disk
'!!!! This function uses FileSystemObject to save the file. !!!!!
'So you can only use text files to upload. Save binary files by th
e function takes undefined results.
'To upload binary files see ScriptUtilities, http://www.pstruh.cz
'You can save files with original file names :
'Set TextStream = FS.CreateTextFile(OutFolder & "\" & Field.FileNa
me )
'Or with names of the fields
Set TextStream = FS.CreateTextFile(OutFolder & "\" & Field.Name &
".")
'And this is the problem why only short text files - BinaryToS
tring uses char-to-char conversion. It takes a lot of computer time.
TextStream.Write BinaryToString(Field.Value) ' BinaryToString is i
n upload.inc.
TextStream.Close
'Create log line with info about the field
LogLine = LogLine & """" & LogF(Field.name) & LogSeparator & LogF(
Field.Length) & LogSeparator & LogF(Field.ContentDisposition) & LogSep
arator & LogF(Field.FileName) & LogSeparator & LogF(Field.ContentType)
& """" & LogSeparator
Next
'Creates line with global request info
pLogLine = pLogLine & Request.ServerVariables("REMOTE_ADDR") & LogSe
parator
pLogLine = pLogLine & LogF(Request.ServerVariables("LOGON_USER")) &
LogSeparator
pLogLine = pLogLine & Request.ServerVariables("HTTP_Content_Length")
& LogSeparator
pLogLine = pLogLine & OutFolder & LogSeparator
pLogLine = pLogLine & LogLine
pLogLine = pLogLine & LogF(Request.ServerVariables("HTTP_USER_AGENT"
)) & LogSeparator
pLogLine = pLogLine & LogF(Request.ServerVariables("HTTP_COOKIE"))
'Create output line for the client
OutLine = OutLine & "Fields was saved to the " & OutFolder & "> folder.<br>"
DoLog pLogLine, "UP"
OutFolder = Empty 'Clear variables.
SaveUpload = OutLine
End Function
'Writes one log line to the log file
Function DoLog(LogLine, LogPrefix)
if LogFolder = "" then LogFolder = Server.MapPath(".")
Const LogSeparator = ", "
Dim OutStream, FileName
FileName = LogPrefix & Right("0" & Year(Now), 2) & Right("0" & Month
(Now), 2) & Right("0" & Day(Now), 2) & ".LOG"
Set OutStream = Server.CreateObject("Scripting.FileSystemObject").Op
enTextFile(LogFolder & "\" & FileName, 8, True)
OutStream.WriteLine Now() & LogSeparator & LogLine
OutStream = Empty
End Function
'Returns field or "-" if field is empty
Function LogF(ByVal F)
If "" & F = "" Then LogF = "-" Else LogF = "" & F
End Function
'Returns field or "-" if field is empty
Function LogFn(ByVal F)
If "" & F = "" Then LogFn = "-" Else LogFn = formatnumber(F,0)
End Function
Dim Kernel, TickCount, KernelTime, UserTime
Sub BeginTimer()
on error resume next
Set Kernel = CreateObject("ScriptUtils.Kernel") 'Creates the Kernel
object
'Get start times
TickCount = Kernel.TickCount
KernelTime = Kernel.CurrentThread.KernelTime
UserTime = Kernel.CurrentThread.UserTime
on error goto 0
End Sub
Sub EndTimer()
'Write times
on error resume next
Response.Write "<br>Script time : " & (Kernel.TickCount - TickCount)
& " ms"
Response.Write "<br>Kernel time : " & CLng((Kernel.CurrentThread.Ker
nelTime - KernelTime) * 86400000) & " ms"
Response.Write "<br>User time : " & CLng((Kernel.CurrentThread.UserT
ime - UserTime) * 86400000) & " ms"
on error goto 0
Kernel = Empty
End Sub
</SCRIPT>
文件fformat.inc
<SCRIPT RUNAT=SERVER LANGUAGE=VBSCRIPT>
function Foot()
DIM HTML
HTML = "<hr><Table Border=0 Width=100%><TR><TD>燬ampl
e upload/download via ASP from PSTRUH Sof
tware."
HTML = HTML & "</td><td Align=right><A HRef=http://ww
w.pstruh.cz/help/ScptUtl/library.htm>Activex Upload?A HRef=http://
www.pstruh.cz/help/usrmgr/library.htm>ActiveX UserManager?A HRef=h
ttp://www.pstruh.cz/help/RSConv/library.htm>DBF on-the-fly?A HRef=
http://www.pstruh.cz/help/tcpip/library.htm>ActiveX DNS+TraceRoute
?A HRef=http://www.pstruh.cz/help/urlrepl/library.htm>URL Replacer
?/Font>"
HTML = HTML & "</td></tr></table></Body></HTML>"
Foot = HTML
end function
function Head(Title, Description)
DIM HTML
HTML = "<HTML><Head>"
HTML = HTML & "<Title>" & Title & "</Title>"
HTML = HTML & "<Meta Content=""" & Description & """ Name=""Descript
ion"">"
HTML = HTML & Style()
HTML = HTML & "</Head>"
HTML = HTML & Body()
Head = HTML
end function
function Body()
DIM HTML
HTML = "<body ALINK=YELLOW bgcolor=White LeftMargin=0 TopMargin=0>"
&vbCrLf
HTML = HTML & ClHead() &vbCrLf
HTML = HTML & Source()
Body = HTML
'<LeftMargin=0 TopMargin=0 Style="margin-right:0pt; margin-top:0pt;
margin-left:0pt;">
end function
function Style()
Style = "<STYLE TYPE=""text/css""><--BODY{font-size:10pt;font-family
:Arial,Arial CE,Helvetica,sans-serif }--></STYLE>"
'<LeftMargin=0 TopMargin=0 Style="margin-right:0pt; margin-top:0pt;
margin-left:0pt;">
end function
function ClHead()
DIM HTML
HTML = HTML & "<TABLE width=100% border=1 cellpadding=1 cellspacing=
0 BORDERCOLOR=WHITE><tr bgcolor=SILVER>"
HTML = HTML & "<th><a href=fupload.asp>Multiple text files upload></th>"
HTML = HTML & "<th><a href=fdbupl.asp>Upload to database</th>"
HTML = HTML & "<th><a href=fdbdown.asp>Download from database</t
h>"
HTML = HTML & "<th><a href=" & request.servervariables("script_name"
) & "?S=1>View source</th>"
HTML = HTML & "</tr></table>"
ClHead = HTML
end function
function Source()
DIM HTML
if request.querystring("S")<>"" then
HTML = HTML & "<pre>" & server.htmlencode(CreateObject("Scripting.
FileSystemObject").OpenTextFile _
(server.mappath(request.servervariables("script_name")), 1, False,
False).readall) & "</pre>"
end if
Source = BasicEncode(HTML)
end function
Function BasicEncode(ByVal VBCode)
' Dim Pom, PosStart, PosEnd
' PosStart = InStr(VBCode, "'")
' Do While PosStart > 0
' PosEnd = InStr(PosStart + 1, VBCode, vbCrLf)
' If PosEnd = 0 Then PosEnd = Len(VBCode)
' Pom = Left(VBCode, PosStart - 1) & ""
' Pom = Pom & Mid(VBCode, PosStart, PosEnd - PosStart - 0) & "</fon
t>"
' Pom = Pom & Mid(VBCode, PosEnd)
' VBCode = Pom
' PosStart = InStr(PosEnd + 1, VBCode, "'")
' Loop
VBCode = FilterBeginEnd(VBCode, "'", vbCrLf, "green")
VBCode = FilterBeginEnd(VBCode, """, """, "brown")
VBCode = FilterWord(VBCode, "Set ", "blue")
VBCode = FilterWord(VBCode, "If ", "blue")
VBCode = FilterWord(VBCode, "For ", "blue")
VBCode = FilterWord(VBCode, " Then", "blue")
VBCode = FilterWord(VBCode, " In ", "blue")
VBCode = FilterWord(VBCode, "Each ", "blue")
VBCode = FilterWord(VBCode, "Function ", "blue")
VBCode = FilterWord(VBCode, "End Function", "blue")
VBCode = FilterWord(VBCode, "MsgBox ", "blue")
VBCode = FilterWord(VBCode, "OutPut ", "blue")
VBCode = FilterWord(VBCode, "Empty", "blue")
VBCode = FilterWord(VBCode, "Debug.Print ", "darkblue")
VBCode = FilterWord(VBCode, "Print ", "blue")
VBCode = FilterWord(VBCode, " And ", "blue")
VBCode = FilterWord(VBCode, " Or ", "blue")
VBCode = FilterWord(VBCode, "Next" & vbcrlf, "blue")
VBCode = FilterWord(VBCode, "Next " , "blue")
VBCode = FilterWord(VBCode, "Response.Write", "darkblue")
VBCode = FilterWord(VBCode, "Response.BinaryWrite" , "darkblue")
VBCode = FilterWord(VBCode, "Response.ContentType" , "darkblue")
VBCode = FilterWord(VBCode, "Response.AddHeader" , "darkblue")
VBCode = FilterWord(VBCode, "Server.CreateObject" , "darkblue")
VBCode = FilterWord(VBCode, "CreateObject" , "darkblue")
' VBCode = FilterWord(VBCode," = ","red")
BasicEncode = VBCode
End Function
Function FilterBeginEnd(ByVal VBCode, ByVal sBegin, ByVal sEnd, ByVal
Color)
Dim Pom, PosStart, PosEnd, FontColor
FontColor = "<font color=" & Color & ">"
PosStart = InStr(ucase(VBCode), ucase(sBegin))
Do While PosStart > 0
PosEnd = InStr(PosStart + Len(sBegin), ucase(VBCode), ucase(sEnd))
If PosEnd = 0 Then PosEnd = Len(VBCode)
Pom = Left(VBCode, PosStart - 1) & FontColor
Pom = Pom & Mid(VBCode, PosStart, PosEnd - PosStart + Len(sEnd)) &
""
Pom = Pom & Mid(VBCode, PosEnd + Len(sEnd))
VBCode = Pom
PosStart = InStr(PosEnd + Len(FontColor) + Len("") + Len(sE
nd), ucase(VBCode), ucase(sBegin))
Loop
FilterBeginEnd = VBCode
End Function
Function FilterWord(ByVal VBCode, ByVal Word, ByVal Color)
Dim Pom, PosStart, PosEnd, FontWord
FontWord = "<font color=" & Color & ">" & Word & ""
PosStart = InStr(ucase(VBCode), ucase(Word))
Do While PosStart > 0
Pom = Left(VBCode, PosStart - 1) & FontWord
Pom = Pom & Mid(VBCode, PosStart + Len(Word))
VBCode = Pom
PosStart = InStr(PosStart + Len(FontWord), ucase(VBCode), ucase(Wo
rd))
Loop
FilterWord = VBCode
End Function
</SCRIPT>
--
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