Comment télécharger des fichiers avec asp-classic
Je veux créer une page avec asp-classic où les utilisateurs peuvent télécharger des fichiers ou des dossiers zippés.
J'ai recherché dans Google mais chaque solution que j'ai trouvée utilise un fichier tiers. Mais je n'ai pas réussi à faire fonctionner ces fichiers.
longtemps depuis que je l'ai fait, mais nous avons utilisé un téléchargement sans composants tiers, seulement deux classes vbscript (le crédit de la solution revient à Lewis Moten).
On dirait que vous pouvez toujours trouver cette "solution Lewis Moten" dans la nature
Si vous incluez le fichier clsUpload, le processus de téléchargement est aussi simple que:
Dim objUpload
Dim strFile, strPath
' Instantiate Upload Class '
Set objUpload = New clsUpload
strFile = objUpload.Fields("file").FileName
strPath = server.mappath("/data") & "/" & strFile
' Save the binary data to the file system '
objUpload("file").SaveAs strPath
Set objUpload = Nothing
C'est tout pour le côté serveur ...
Du côté client, vous avez juste besoin de votre entrée de fichier
<form name="Upload" enctype="multipart/form-data" method="post" action="clsUpload.asp">
<div>Upload file: </div>
<div><INPUT TYPE="file" NAME="file" >
<input type="button" name="FileUpload" value="Upload File"> </div>
</form>
J'espère que cela t'aides..
Modifier le 23 juin 2014
Comme l'a souligné Dave Wut ma référence à la solution "dans la nature" n'était pas complètement cohérente avec l'extrait de code fourni. Par les présentes, les classes complètes que j'avais utilisées historiquement ( commentaires coupés pour rester en dessous de la limite de 30000 SO limite). Il s'agissait d'une première version de la solution Lewis Moten trouvée à http://planet-source-code.com/vb/ scripts/ShowCode.asp? txtCodeId = 8525 & lngWId = 4
1) Contenu de clsUpload.asp
<!--METADATA
TYPE="TypeLib"
NAME="Microsoft ActiveX Data Objects 2.5 Library"
UUID="{00000205-0000-0010-8000-00AA006D2EA4}"
VERSION="2.5"
-->
<!--#INCLUDE FILE="clsField.asp"-->
<%
' ------------------------------------------------------------------------------
' Author: Lewis Moten
' Date: March 19, 2002
' ------------------------------------------------------------------------------
' Upload class retrieves multi-part form data posted to web page
' and parses it into objects that are easy to interface with.
' Requires MDAC (ADODB) COM components found on most servers today
' Additional compenents are not necessary.
'
Class clsUpload
' ------------------------------------------------------------------------------
Private mbinData ' bytes visitor sent to server
Private mlngChunkIndex ' byte where next chunk starts
Private mlngBytesReceived ' length of data
Private mstrDelimiter ' Delimiter between multipart/form-data (43 chars)
Private CR ' ANSI Carriage Return
Private LF ' ANSI Line Feed
Private CRLF ' ANSI Carriage Return & Line Feed
Private mobjFieldAry() ' Array to hold field objects
Private mlngCount ' Number of fields parsed
' ------------------------------------------------------------------------------
Private Sub RequestData
Dim llngLength ' Number of bytes received
' Determine number bytes visitor sent
mlngBytesReceived = Request.TotalBytes
' Store bytes recieved from visitor
mbinData = Request.BinaryRead(mlngBytesReceived)
End Sub
' ------------------------------------------------------------------------------
Private Sub ParseDelimiter()
' Delimiter seperates multiple pieces of form data
' "around" 43 characters in length
' next character afterwards is carriage return (except last line has two --)
' first part of delmiter is dashes followed by hex number
' hex number is possibly the browsers session id?
' Examples:
' -----------------------------7d230d1f940246
' -----------------------------7d22ee291ae0114
mstrDelimiter = MidB(mbinData, 1, InStrB(1, mbinData, CRLF) - 1)
End Sub
' ------------------------------------------------------------------------------
Private Sub ParseData()
' This procedure loops through each section (chunk) found within the
' delimiters and sends them to the parse chunk routine
Dim llngStart ' start position of chunk data
Dim llngLength ' Length of chunk
Dim llngEnd ' Last position of chunk data
Dim lbinChunk ' Binary contents of chunk
' Initialize at first character
llngStart = 1
' Find start position
llngStart = InStrB(llngStart, mbinData, mstrDelimiter & CRLF)
' While the start posotion was found
While Not llngStart = 0
' Find the end position (after the start position)
llngEnd = InStrB(llngStart + 1, mbinData, mstrDelimiter) - 2
' Determine Length of chunk
llngLength = llngEnd - llngStart
' Pull out the chunk
lbinChunk = MidB(mbinData, llngStart, llngLength)
' Parse the chunk
Call ParseChunk(lbinChunk)
' Look for next chunk after the start position
llngStart = InStrB(llngStart + 1, mbinData, mstrDelimiter & CRLF)
Wend
End Sub
' ------------------------------------------------------------------------------
Private Sub ParseChunk(ByRef pbinChunk)
' This procedure gets a chunk passed to it and parses its contents.
' There is a general format that the chunk follows.
' First, the deliminator appears
' Next, headers are listed on each line that define properties of the chunk.
' Content-Disposition: form-data: name="File1"; filename="C:\Photo.gif"
' Content-Type: image/gif
' After this, a blank line appears and is followed by the binary data.
Dim lstrName ' Name of field
Dim lstrFileName ' File name of binary data
Dim lstrContentType ' Content type of binary data
Dim lbinData ' Binary data
Dim lstrDisposition ' Content Disposition
Dim lstrValue ' Value of field
' Parse out the content dispostion
lstrDisposition = ParseDisposition(pbinChunk)
' And Parse the Name
lstrName = ParseName(lstrDisposition)
' And the file name
lstrFileName = ParseFileName(lstrDisposition)
' Parse out the Content Type
lstrContentType = ParseContentType(pbinChunk)
' If the content type is not defined, then assume the
' field is a normal form field
If lstrContentType = "" Then
' Parse Binary Data as Unicode
lstrValue = CStrU(ParseBinaryData(pbinChunk))
' Else assume the field is binary data
Else
' Parse Binary Data
lbinData = ParseBinaryData(pbinChunk)
End If
' Add a new field
Call AddField(lstrName, lstrFileName, lstrContentType, lstrValue, lbinData)
End Sub
' ------------------------------------------------------------------------------
Private Sub AddField(ByRef pstrName, ByRef pstrFileName, ByRef pstrContentType, ByRef pstrValue, ByRef pbinData)
Dim lobjField ' Field object class
' Add a new index to the field array
' Make certain not to destroy current fields
ReDim Preserve mobjFieldAry(mlngCount)
' Create new field object
Set lobjField = New clsField
' Set field properties
lobjField.Name = pstrName
lobjField.FilePath = pstrFileName
lobjField.ContentType = pstrContentType
' If field is not a binary file
If LenB(pbinData) = 0 Then
lobjField.BinaryData = ChrB(0)
lobjField.Value = pstrValue
lobjField.Length = Len(pstrValue)
' Else field is a binary file
Else
lobjField.BinaryData = pbinData
lobjField.Length = LenB(pbinData)
lobjField.Value = ""
End If
' Set field array index to new field
Set mobjFieldAry(mlngCount) = lobjField
' Incriment field count
mlngCount = mlngCount + 1
End Sub
' ------------------------------------------------------------------------------
Private Function ParseBinaryData(ByRef pbinChunk)
' Parses binary content of the chunk
Dim llngStart ' Start Position
' Find first occurence of a blank line
llngStart = InStrB(1, pbinChunk, CRLF & CRLF)
' If it doesn't exist, then return nothing
If llngStart = 0 Then Exit Function
' Incriment start to pass carriage returns and line feeds
llngStart = llngStart + 4
' Return the last part of the chunk after the start position
ParseBinaryData = MidB(pbinChunk, llngStart)
End Function
' ------------------------------------------------------------------------------
Private Function ParseContentType(ByRef pbinChunk)
' Parses the content type of a binary file.
' example: image/gif is the content type of a GIF image.
Dim llngStart ' Start Position
Dim llngEnd ' End Position
Dim llngLength ' Length
' Fid the first occurance of a line starting with Content-Type:
llngStart = InStrB(1, pbinChunk, CRLF & CStrB("Content-Type:"), vbTextCompare)
' If not found, return nothing
If llngStart = 0 Then Exit Function
' Find the end of the line
llngEnd = InStrB(llngStart + 15, pbinChunk, CR)
' If not found, return nothing
If llngEnd = 0 Then Exit Function
' Adjust start position to start after the text "Content-Type:"
llngStart = llngStart + 15
' If the start position is the same or past the end, return nothing
If llngStart >= llngEnd Then Exit Function
' Determine length
llngLength = llngEnd - llngStart
' Pull out content type
' Convert to unicode
' Trim out whitespace
' Return results
ParseContentType = Trim(CStrU(MidB(pbinChunk, llngStart, llngLength)))
End Function
' ------------------------------------------------------------------------------
Private Function ParseDisposition(ByRef pbinChunk)
' Parses the content-disposition from a chunk of data
'
' Example:
'
' Content-Disposition: form-data: name="File1"; filename="C:\Photo.gif"
'
' Would Return:
' form-data: name="File1"; filename="C:\Photo.gif"
Dim llngStart ' Start Position
Dim llngEnd ' End Position
Dim llngLength ' Length
' Find first occurance of a line starting with Content-Disposition:
llngStart = InStrB(1, pbinChunk, CRLF & CStrB("Content-Disposition:"), vbTextCompare)
' If not found, return nothing
If llngStart = 0 Then Exit Function
' Find the end of the line
llngEnd = InStrB(llngStart + 22, pbinChunk, CRLF)
' If not found, return nothing
If llngEnd = 0 Then Exit Function
' Adjust start position to start after the text "Content-Disposition:"
llngStart = llngStart + 22
' If the start position is the same or past the end, return nothing
If llngStart >= llngEnd Then Exit Function
' Determine Length
llngLength = llngEnd - llngStart
' Pull out content disposition
' Convert to Unicode
' Return Results
ParseDisposition = CStrU(MidB(pbinChunk, llngStart, llngLength))
End Function
' ------------------------------------------------------------------------------
Private Function ParseName(ByRef pstrDisposition)
' Parses the name of the field from the content disposition
'
' Example
'
' form-data: name="File1"; filename="C:\Photo.gif"
'
' Would Return:
' File1
Dim llngStart ' Start Position
Dim llngEnd ' End Position
Dim llngLength ' Length
' Find first occurance of text name="
llngStart = InStr(1, pstrDisposition, "name=""", vbTextCompare)
' If not found, return nothing
If llngStart = 0 Then Exit Function
' Find the closing quote
llngEnd = InStr(llngStart + 6, pstrDisposition, """")
' If not found, return nothing
If llngEnd = 0 Then Exit Function
' Adjust start position to start after the text name="
llngStart = llngStart + 6
' If the start position is the same or past the end, return nothing
If llngStart >= llngEnd Then Exit Function
' Determine Length
llngLength = llngEnd - llngStart
' Pull out field name
' Return results
ParseName = Mid(pstrDisposition, llngStart, llngLength)
End Function
' ------------------------------------------------------------------------------
Private Function ParseFileName(ByRef pstrDisposition)
' Parses the name of the field from the content disposition
'
' Example
'
' form-data: name="File1"; filename="C:\Photo.gif"
'
' Would Return:
' C:\Photo.gif
Dim llngStart ' Start Position
Dim llngEnd ' End Position
Dim llngLength ' Length
' Find first occurance of text filename="
llngStart = InStr(1, pstrDisposition, "filename=""", vbTextCompare)
' If not found, return nothing
If llngStart = 0 Then Exit Function
' Find the closing quote
llngEnd = InStr(llngStart + 10, pstrDisposition, """")
' If not found, return nothing
If llngEnd = 0 Then Exit Function
' Adjust start position to start after the text filename="
llngStart = llngStart + 10
' If the start position is the same of past the end, return nothing
If llngStart >= llngEnd Then Exit Function
' Determine length
llngLength = llngEnd - llngStart
' Pull out file name
' Return results
ParseFileName = Mid(pstrDisposition, llngStart, llngLength)
End Function
' ------------------------------------------------------------------------------
Public Property Get Count()
' Return number of fields found
Count = mlngCount
End Property
' ------------------------------------------------------------------------------
Public Default Property Get Fields(ByVal pstrName)
Dim llngIndex ' Index of current field
' If a number was passed
If IsNumeric(pstrName) Then
llngIndex = CLng(pstrName)
' If programmer requested an invalid number
If llngIndex > mlngCount - 1 Or llngIndex < 0 Then
' Raise an error
Call Err.Raise(vbObjectError + 1, "clsUpload.asp", "Object does not exist within the ordinal reference.")
Exit Property
End If
' Return the field class for the index specified
Set Fields = mobjFieldAry(pstrName)
' Else a field name was passed
Else
' convert name to lowercase
pstrName = LCase(pstrname)
' Loop through each field
For llngIndex = 0 To mlngCount - 1
' If name matches current fields name in lowercase
If LCase(mobjFieldAry(llngIndex).Name) = pstrName Then
' Return Field Class
Set Fields = mobjFieldAry(llngIndex)
Exit Property
End If
Next
End If
' If matches were not found, return an empty field
Set Fields = New clsField
' ' ERROR ON NonExistant:
' ' If matches were not found, raise an error of a non-existent field
' Call Err.Raise(vbObjectError + 1, "clsUpload.asp", "Object does not exist within the ordinal reference.")
' Exit Property
End Property
' ------------------------------------------------------------------------------
Private Sub Class_Terminate()
' This event is called when you destroy the class.
'
' Example:
' Set objUpload = Nothing
'
' Example:
' Response.End
'
' Example:
' Page finnishes executing ...
Dim llngIndex ' Current Field Index
' Loop through fields
For llngIndex = 0 To mlngCount - 1
' Release field object
Set mobjFieldAry(llngIndex) = Nothing
Next
' Redimension array and remove all data within
ReDim mobjFieldAry(-1)
End Sub
' ------------------------------------------------------------------------------
Private Sub Class_Initialize()
' This event is called when you instantiate the class.
'
' Example:
' Set objUpload = New clsUpload
' Redimension array with nothing
ReDim mobjFieldAry(-1)
' Compile ANSI equivilants of carriage returns and line feeds
CR = ChrB(Asc(vbCr)) ' vbCr Carriage Return
LF = ChrB(Asc(vbLf)) ' vbLf Line Feed
CRLF = CR & LF ' vbCrLf Carriage Return & Line Feed
' Set field count to zero
mlngCount = 0
' Request data
Call RequestData
' Parse out the delimiter
Call ParseDelimiter()
' Parse the data
Call ParseData
End Sub
' ------------------------------------------------------------------------------
Private Function CStrU(ByRef pstrANSI)
' Converts an ANSI string to Unicode
' Best used for small strings
Dim llngLength ' Length of ANSI string
Dim llngIndex ' Current position
' determine length
llngLength = LenB(pstrANSI)
' Loop through each character
For llngIndex = 1 To llngLength
' Pull out ANSI character
' Get Ascii value of ANSI character
' Get Unicode Character from Ascii
' Append character to results
CStrU = CStrU & Chr(AscB(MidB(pstrANSI, llngIndex, 1)))
Next
End Function
' ------------------------------------------------------------------------------
Private Function CStrB(ByRef pstrUnicode)
' Converts a Unicode string to ANSI
' Best used for small strings
Dim llngLength ' Length of ANSI string
Dim llngIndex ' Current position
' determine length
llngLength = Len(pstrUnicode)
' Loop through each character
For llngIndex = 1 To llngLength
' Pull out Unicode character
' Get Ascii value of Unicode character
' Get ANSI Character from Ascii
' Append character to results
CStrB = CStrB & ChrB(Asc(Mid(pstrUnicode, llngIndex, 1)))
Next
End Function
' ------------------------------------------------------------------------------
End Class
' ------------------------------------------------------------------------------
%>
2) Contenu de clsField.asp
<%
' ------------------------------------------------------------------------------
' Author: Lewis Moten
' Date: March 19, 2002
' ------------------------------------------------------------------------------
' Field class represents interface to data passed within one field
'
' ------------------------------------------------------------------------------
Class clsField
Public Name ' Name of the field defined in form
Private mstrPath ' Full path to file on visitors computer
' C:\Documents and Settings\lmoten\Desktop\Photo.gif
Public FileDir ' Directory that file existed in on visitors computer
' C:\Documents and Settings\lmoten\Desktop
Public FileExt ' Extension of the file
' GIF
Public FileName ' Name of the file
' Photo.gif
Public ContentType ' Content / Mime type of file
' image/gif
Public Value ' Unicode value of field (used for normail form fields - not files)
Public BinaryData ' Binary data passed with field (for files)
Public Length ' byte size of value or binary data
Private mstrText ' Text buffer
' If text format of binary data is requested more then
' once, this value will be read to prevent extra processing
' ------------------------------------------------------------------------------
Public Property Get BLOB()
BLOB = BinaryData
End Property
' ------------------------------------------------------------------------------
Public Function BinaryAsText()
' Binary As Text returns the unicode equivilant of the binary data.
' this is useful if you expect a visitor to upload a text file that
' you will need to work with.
' NOTICE:
' NULL values will prematurely terminate your Unicode string.
' NULLs are usually found within binary files more often then plain-text files.
' a simple way around this may consist of replacing null values with another character
' such as a space " "
Dim lbinBytes
Dim lobjRs
' Don't convert binary data that does not exist
If Length = 0 Then Exit Function
If LenB(BinaryData) = 0 Then Exit Function
' If we previously converted binary to text, return the buffered content
If Not Len(mstrText) = 0 Then
BinaryAsText = mstrText
Exit Function
End If
' Convert Integer Subtype Array to Byte Subtype Array
lbinBytes = ASCII2Bytes(BinaryData)
' Convert Byte Subtype Array to Unicode String
mstrText = Bytes2Unicode(lbinBytes)
' Return Unicode Text
BinaryAsText = mstrText
End Function
' ------------------------------------------------------------------------------
Public Sub SaveAs(ByRef pstrFileName)
Dim lobjStream
Dim lobjRs
Dim lbinBytes
' Don't save files that do not posess binary data
If Length = 0 Then Exit Sub
If LenB(BinaryData) = 0 Then Exit Sub
' Create magical objects from never never land
Set lobjStream = Server.CreateObject("ADODB.Stream")
' Let stream know we are working with binary data
lobjStream.Type = adTypeBinary
' Open stream
Call lobjStream.Open()
' Convert Integer Subtype Array to Byte Subtype Array
lbinBytes = ASCII2Bytes(BinaryData)
' Write binary data to stream
Call lobjStream.Write(lbinBytes)
' Save the binary data to file system
' Overwrites file if previously exists!
Call lobjStream.SaveToFile(pstrFileName, adSaveCreateOverWrite)
' Close the stream object
Call lobjStream.Close()
' Release objects
Set lobjStream = Nothing
End Sub
' ------------------------------------------------------------------------------
Public Property Let FilePath(ByRef pstrPath)
mstrPath = pstrPath
' Parse File Ext
If Not InStrRev(pstrPath, ".") = 0 Then
FileExt = Mid(pstrPath, InStrRev(pstrPath, ".") + 1)
FileExt = UCase(FileExt)
End If
' Parse File Name
If Not InStrRev(pstrPath, "\") = 0 Then
FileName = Mid(pstrPath, InStrRev(pstrPath, "\") + 1)
End If
' Parse File Dir
If Not InStrRev(pstrPath, "\") = 0 Then
FileDir = Mid(pstrPath, 1, InStrRev(pstrPath, "\") - 1)
End If
End Property
' ------------------------------------------------------------------------------
Public Property Get FilePath()
FilePath = mstrPath
End Property
' ------------------------------------------------------------------------------
Private Function ASCII2Bytes(ByRef pbinBinaryData)
Dim lobjRs
Dim llngLength
Dim lbinBuffer
' get number of bytes
llngLength = LenB(pbinBinaryData)
Set lobjRs = Server.CreateObject("ADODB.Recordset")
' create field in an empty recordset to hold binary data
Call lobjRs.Fields.Append("BinaryData", adLongVarBinary, llngLength)
' Open recordset
Call lobjRs.Open()
' Add a new record to recordset
Call lobjRs.AddNew()
' Populate field with binary data
Call lobjRs.Fields("BinaryData").AppendChunk(pbinBinaryData & ChrB(0))
' Update / Convert Binary Data
' Although the data we have is binary - it has still been
' formatted as 4 bytes to represent each byte. When we
' update the recordset, the Integer Subtype Array that we
' passed into the Recordset will be converted into a
' Byte Subtype Array
Call lobjRs.Update()
' Request binary data and save to stream
lbinBuffer = lobjRs.Fields("BinaryData").GetChunk(llngLength)
' Close recordset
Call lobjRs.Close()
' Release recordset from memory
Set lobjRs = Nothing
' Return Bytes
ASCII2Bytes = lbinBuffer
End Function
' ------------------------------------------------------------------------------
Private Function Bytes2Unicode(ByRef pbinBytes)
Dim lobjRs
Dim llngLength
Dim lstrBuffer
llngLength = LenB(pbinBytes)
Set lobjRs = Server.CreateObject("ADODB.Recordset")
' Create field in an empty recordset to hold binary data
Call lobjRs.Fields.Append("BinaryData", adLongVarChar, llngLength)
' Open Recordset
Call lobjRs.Open()
' Add a new record to recordset
Call lobjRs.AddNew()
' Populate field with binary data
Call lobjRs.Fields("BinaryData").AppendChunk(pbinBytes)
' Update / Convert.
' Ensure bytes are proper subtype
Call lobjRs.Update()
' Request unicode value of binary data
lstrBuffer = lobjRs.Fields("BinaryData").Value
' Close recordset
Call lobjRs.Close()
' Release recordset from memory
Set lobjRs = Nothing
' Return Unicode
Bytes2Unicode = lstrBuffer
End Function
' ------------------------------------------------------------------------------
End Class
' ------------------------------------------------------------------------------
%>
La propriété FileName n'a jamais été définie, j'ajoute cette ligne manquante dans clsUpload.asp (entre les lignes 157 et 158) dans Private Sub AddField (...)
lobjField.Name = pstrName
lobjField.FilePath = pstrFileName
lobjField.FileName = Mid(pstrFileName, InStrRev(pstrFileName, "\") + 1) ' <= line added to set the file name
lobjField.ContentType = pstrContentType
Vous devez également déclarer la constante ci-dessous: Const adSaveCreateOverWrite = 2