B4X

FTP Non-Recursive Sync Directory (Download)

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Download files from the server that have filenames matchhing a pattern, and don't yet exist in a local 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 = "myUsername"
ftp.Password = "myPassword"
ftp.Port = 21
ftp.AuthTls = True

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


'  Change to the remote directory where the files are located.
'  This step is only necessary if the files are not in the root directory
'  of the FTP account.
success = ftp.ChangeRemoteDir("qa")
If success <> True Then
    Log(ftp.LastErrorText)
    Return
End If


'  Indicate that we only want to download files with filenames ending in ".txt"
ftp.SyncMustMatch = "*.txt"

'  Modes for synchronization are as follows:
'  mode=0: Download all files
'  mode=1: Download all files that do not exist on the local filesystem.
'  mode=2: Download newer or non-existant files.
'  mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
'  mode=5: Download only missing files or files with size differences.
'  mode=6: Same as mode 5, but also download newer files.
'  mode=99: Do not download files, but instead delete remote files that do not exist locally.
Dim mode As Int = 1

'  Download all files matching "*.txt" from the current remote ftp directory.
'  The files are downloaded into c:/temp/qa_output
success = ftp.SyncLocalDir("c:/temp/qa_output", mode)
If success <> True Then
    Log(ftp.LastErrorText)
    Return
End If


'  Perhaps we wish to delete the files we just downloaded from the server..
Dim st As ChilkatStringTable
st.Initialize
ftp.GetSyncedFiles(st)

Dim numFiles As Int = st.Count
Dim i As Int = 0
Dim remoteFilename As String
Do While i < numFiles
    remoteFilename = st.StringAt(i)
    Log("Deleting " & remoteFilename & " from the FTP server")
    success = ftp.DeleteRemoteFile(remoteFilename)
    If success <> True Then
        Log(ftp.LastErrorText)
        Return
    End If

    i = i + 1
Loop

success = ftp.Disconnect