Chilkat Examples

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Streaming SFTP Download

Demonstrates how to download a file chunk by chunk from an SSH server.

LOCAL loSftp
LOCAL lnSuccess
LOCAL lnPort
LOCAL lcHostname
LOCAL lcHandle
LOCAL loPData
LOCAL lnBEof
LOCAL lnChunkSize

*  Important: It is helpful to send the contents of the
*  sftp.LastErrorText property when requesting support.

loSftp = CreateObject('Chilkat.SFtp')

*  Any string automatically begins a fully-functional 30-day trial.

lnSuccess = loSftp.UnlockComponent("Anything for 30-day trial")
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loSftp.LastErrorText)
    QUIT
ENDIF

*  Set some timeouts, in milliseconds:
loSftp.ConnectTimeoutMs = 5000
loSftp.IdleTimeoutMs = 15000

*  Connect to the SSH server.
*  The standard SSH port = 22
*  The hostname may be a hostname or IP address.

lcHostname = "www.my-ssh-server.com"
lnPort = 22
lnSuccess = loSftp.Connect(lcHostname,lnPort)
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loSftp.LastErrorText)
    QUIT
ENDIF

*  Authenticate with the SSH server.  Chilkat SFTP supports
*  both password-based authenication as well as public-key
*  authentication.  This example uses password authenication.
lnSuccess = loSftp.AuthenticatePw("myLogin","myPassword")
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loSftp.LastErrorText)
    QUIT
ENDIF

*  After authenticating, the SFTP subsystem must be initialized:
lnSuccess = loSftp.InitializeSftp()
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loSftp.LastErrorText)
    QUIT
ENDIF

*  Open a file on the server:

lcHandle = loSftp.OpenFile("hamlet.xml","readOnly","openExisting")
IF (lcHandle = NULL ) THEN
    =MESSAGEBOX(loSftp.LastErrorText)
    QUIT
ENDIF

lnBEof = 0

lnChunkSize = 10000

DO WHILE lnBEof = 0

    loPData = loSftp.ReadFileBytes(lcHandle,lnChunkSize)
    IF (loSftp.LastReadFailed(lcHandle) = 1) THEN
        =MESSAGEBOX(loSftp.LastErrorText)
        EXIT
    ELSE

        *  Do whatever  you wish with the data received...
        *  It is possible that if the EOF is reached, 0 bytes will be returned.

    ENDIF

    lnBEof = loSftp.Eof(lcHandle)
ENDDO

*  Close the file.
lnSuccess = loSftp.CloseHandle(lcHandle)
IF (lnSuccess <> 1) THEN
    =MESSAGEBOX(loSftp.LastErrorText)
    QUIT
ENDIF

=MESSAGEBOX("Success.")
 

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