Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.


FTP File transfer - ASCII mode

FTP File transfer - ASCII mode

I am using the solution given by 1DMF in the below thread:

The problem is that, when the last chunk of the file is read, unused parts of the buffer is keeping the previous values and write it in the new file ending with some repeated data. I have done some modifications but I cant get across the files with identical size and content (last part is some blank content and file is usually larger)

I don't want to use the shell commands because I have no control on when the files are finishing the ftp transfer.

Any suggestion?

Copied just the retrieval code...


Function FTPGet(ByVal HostName As String, _
    ByVal UserName As String, _
    ByVal Password As String, _
    ByVal LocalFileName As String, _
    ByVal RemoteFileName As String, _
    ByVal sDir As String, _
    ByVal sMode As String, Optional ByRef iCnt As Integer = 1, Optional ByRef iTot As Integer = 1) As Boolean
On Error GoTo Err_Function

' Declare variables
Dim hConnection, hOpen, hFile  As Long ' Used For Handles
Dim iSize As Long ' Size of file for download
Dim iMaxSize As Long
Dim Retval As Variant ' Used for progress meter
Dim iRead As Long ' Used by InternetReadFile to report bytes downloaded
Dim iLoop As Long ' Loop for downloading chunks
Dim iFile As Integer ' Used for Local file handle
Dim FileData(BUFFER_SIZE - 1) As Byte ' buffer array of BUFFER_SIZE (100) elements 0 to 99
Dim LastChunk() As Byte               ' to capture the last chunk

' Open Internet Connecion
hOpen = InternetOpen("FTP", 1, "", vbNullString, 0)

' Connect to FTP
hConnection = InternetConnect(hOpen, HostName, INTERNET_DEFAULT_FTP_PORT, UserName, Password, INTERNET_SERVICE_FTP, IIf(PassiveConnection, INTERNET_FLAG_PASSIVE, 0), 0)

' Change Directory
Call FtpSetCurrentDirectory(hConnection, sDir)

' Open Remote File
hFile = FtpOpenFile(hConnection, RemoteFileName, GENERIC_READ, IIf(sMode = "Binary", FTP_TRANSFER_TYPE_BINARY, FTP_TRANSFER_TYPE_ASCII), 0)

' Check for successfull file handle
If hFile = 0 Then
    MsgBox "Internet - Failed!"
    FTPGet = False
    GoTo Exit_Function
End If

' Set Download Flag to True
FTPGet = True

' Set file size
iSize = FtpGetFileSize(hFile, iMaxSize)

' Get next file handle number
iFile = FreeFile

' Open local file
Open LocalFileName For Binary Access Write As iFile

' Initialise progress meter
Retval = SysCmd(acSysCmdInitMeter, "Downloading File '" & RemoteFileName & "' - " & iCnt & " of " & iTot, iSize / 1000)

' Loop file size
For iLoop = 1 To iSize \ BUFFER_SIZE
    ' Update progress meter
    Retval = SysCmd(acSysCmdUpdateMeter, (BUFFER_SIZE * iLoop) / 1000)

    ' Read chunk from FTP checking for success
    If InternetReadFile(hFile, FileData(0), BUFFER_SIZE, iRead) = 0 Then
        MsgBox "Download - Failed!"
        FTPGet = False
       GoTo Exit_Function
        ' Check buffer was read
        If iRead <> BUFFER_SIZE Then
            MsgBox "Download - Failed!"
            FTPGet = False
            GoTo Exit_Function
        End If
    End If
    'put file data
    Put iFile, , FileData
Next iLoop

' Handle remaining chunk using MOD if exists
If iSize Mod BUFFER_SIZE > 0 Then

    ' Update progress meter
    Retval = SysCmd(acSysCmdUpdateMeter, iSize / 1000)
    'Empty the array to prevent polution of the file with data from previous loop
    'Erase FileData
    ReDim LastChunk((iSize Mod BUFFER_SIZE) - 1)
    ' Write remainder to file checking for success
    'If InternetReadFile(hFile, FileData(0), iSize Mod BUFFER_SIZE, iRead) = 0 Then
    If InternetReadFile(hFile, LastChunk(0), iSize Mod BUFFER_SIZE, iRead) = 0 Then
        MsgBox "Download - Failed!"
        FTPGet = False
        GoTo Exit_Function
        ' Check buffer was read
        If iRead <> iSize Mod BUFFER_SIZE Then
            MsgBox "download - Failed!"
            FTPGet = False
            GoTo Exit_Function
        End If
    End If
    ' Put file data
    Put iFile, , LastChunk
    'Put iFile, , FileData
End If


' remove progress meter
Retval = SysCmd(acSysCmdRemoveMeter)

'close local file
Close iFile

'close remote file
Call InternetCloseHandle(hFile)

' Close Internet Connection
Call InternetCloseHandle(hOpen)
Call InternetCloseHandle(hConnection)

Exit Function

GoTo Exit_Function

End Function 

RE: FTP File transfer - ASCII mode

Any comments guys?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!


Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close