B4X

SFTP Resume Download

See more SFTP Examples

Demonstrates how to resume an SFTP download from a previous partial download. B4X

Dim success As Boolean = False

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

Dim sftp As ChilkatSFtp
sftp.Initialize("sftp")

'  Set some timeouts, in milliseconds:
sftp.ConnectTimeoutMs = 5000
sftp.IdleTimeoutMs = 10000

'  Connect to the SSH server.  
'  The standard SSH port = 22
'  The hostname may be a hostname or IP address.
Dim hostname As String = "sftp.example.com"
Dim port As Int = 22
success = sftp.Connect(hostname, port)
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  Authenticate with the SSH server.  Chilkat SFTP supports
'  both password-based authenication as well as public-key
'  authentication.  This example uses password authenication.
success = sftp.AuthenticatePw("myLogin", "myPassword")
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  After authenticating, the SFTP subsystem must be initialized:
success = sftp.InitializeSftp
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


'  Download the file:
Dim remoteFilePath As String
Dim localFilePath As String
localFilePath = "c:/temp/hamlet.xml"
remoteFilePath = "subdir1/subdir2/hamlet.xml"
'  The ResumeDownloadFileByName method will check
'  the local file and begin downloading the remote file
'  at the appropriate point.  For example, if the local
'  file is already 215624 bytes long, it will begin downloading
'  the remote file at the 215625'th byte -- appending to
'  the local file.
success = sftp.ResumeDownloadFileByName(remoteFilePath, localFilePath)
If success <> True Then
    Log(sftp.LastErrorText)
    Return
End If


Log("Success.")