B4X

Directory Existence Check

See more FTP Examples

How to test if a directory exists on an FTP server.

A good way to check to see if a directory already exists is to try to "cd" to that remote directory by calling ChangeRemoteDir. If it succeeds, then the directory exists. If not, then it does not exist. An alternative method is to set the ListPattern = "*" and then iterate over the files/directories, looking for the directory.

B4X

Dim success As Boolean = False

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim ftp As ChilkatFtp2
ftp.Initialize("ftp")

ftp.Hostname = "ftp.example.com"
ftp.Username = "login"
ftp.Password = "password"

'  Connect and login to the FTP server.
success = ftp.Connect
If success <> True Then
    Log(ftp.LastErrorText)
    Return
End If


'  Does the "temp" directory exist?
Dim dirExists As Boolean
dirExists = ftp.ChangeRemoteDir("/temp")
If dirExists = True Then
    Log("Yes, the temp directory exists.")
    '   Yes, it exists. Restore the current remote dir:
    success = ftp.ChangeRemoteDir("..")
    If success <> True Then
        Log(ftp.LastErrorText)
        Return
    End If

End If


'  Alternatively, you may set the ListPattern = "*" and 
'   look for the directory:
ftp.ListPattern = "*"

Dim i As Int
Dim n As Int
n = ftp.GetDirCount
If n < 0 Then
    '  Failed to get directory listing based on ListPattern
    Log(ftp.LastErrorText)
    Return
End If

If n > 0 Then
    For i = 0 To n - 1
        Dim isDir As Boolean
        isDir = ftp.GetIsDirectory(i)
        If isDir = True Then
            Dim fname As String
            fname = ftp.GetFilename(i)
            If fname = "temp" Then
                Log("Found temp directory!")
                success = ftp.Disconnect
                Return
            End If

        End If

    Next
End If


success = ftp.Disconnect