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(DataFlex) FTP through SSH Tunnel

Demonstrates how to FTP through an SSH tunnel.

The Chilkat SSH tunnel object is used to create a portable SSH tunnel w/ dynamic port forwarding on a background thread that the foreground thread can use for establishing connections through an SSH tunnel.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoChilkatGlob
    Boolean iSuccess
    Handle hoTunnel
    String sSshHostname
    Integer iSshPort
    Handle hoFtp
    String sLocalPath
    String sRemoteFilename
    Boolean iWaitForThreadExit
    String sTemp1

    //  Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
    //  by calling UnlockBundle.  It requires a Bundle unlock code.
    Get Create (RefClass(cComChilkatGlobal)) To hoChilkatGlob
    If (Not(IsComObjectCreated(hoChilkatGlob))) Begin
        Send CreateComObject of hoChilkatGlob
    End
    Get ComUnlockBundle Of hoChilkatGlob "Anything for 30-day trial." To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoChilkatGlob To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  This example requires Chilkat version 9.5.0.50 or greater.
    Get Create (RefClass(cComChilkatSshTunnel)) To hoTunnel
    If (Not(IsComObjectCreated(hoTunnel))) Begin
        Send CreateComObject of hoTunnel
    End

    Move "www.my-ssh-server.com" To sSshHostname
    Move 22 To iSshPort

    //  Connect to an SSH server and establish the SSH tunnel:
    Get ComConnect Of hoTunnel sSshHostname iSshPort To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Authenticate with the SSH server via a login/password
    //  or with a public key.
    //  This example demonstrates SSH password authentication.
    Get ComAuthenticatePw Of hoTunnel "mySshLogin" "mySshPassword" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Indicate that the background SSH tunnel thread will behave as a SOCKS proxy server
    //  with dynamic port forwarding:
    Set ComDynamicPortForwarding Of hoTunnel To True

    //  We may optionally require that connecting clients authenticate with our SOCKS proxy server.
    //  To do this, set an inbound username/password.  Any connecting clients would be required to
    //  use SOCKS5 with the correct username/password.
    //  If no inbound username/password is set, then our SOCKS proxy server will accept both
    //  SOCKS4 and SOCKS5 unauthenticated connections.

    Set ComInboundSocksUsername Of hoTunnel To "chilkat123"
    Set ComInboundSocksPassword Of hoTunnel To "password123"

    //  Start the listen/accept thread to begin accepting SOCKS proxy client connections.
    //  Listen on port 1080.
    Get ComBeginAccepting Of hoTunnel 1080 To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Now that a background thread is running a SOCKS proxy server that forwards connections
    //  through an SSH tunnel, it is possible to use any Chilkat implemented protocol that is SOCKS capable,
    //  such as Socket, HTTP, POP3, SMTP, IMAP, FTP, etc.  The protocol may use SSL/TLS because the SSL/TLS
    //  will be passed through the SSH tunnel to the end-destination.  Also, any number of simultaneous
    //  connections may be routed through the SSH tunnel.

    //  Let's do an FTP upload through the SSH tunnel.  Both the control and data connections
    //  go through the tunnel.
    Get Create (RefClass(cComChilkatFtp2)) To hoFtp
    If (Not(IsComObjectCreated(hoFtp))) Begin
        Send CreateComObject of hoFtp
    End

    Set ComHostname Of hoFtp To "ftp.someFtpServer.com"
    Set ComUsername Of hoFtp To "****"
    Set ComPassword Of hoFtp To "****"

    //  Indicate that the FTP2 object is to use our portable SOCKS proxy/SSH tunnel running in our background thread.
    Set ComSocksHostname Of hoFtp To "localhost"
    Set ComSocksPort Of hoFtp To 1080
    Set ComSocksVersion Of hoFtp To 5
    Set ComSocksUsername Of hoFtp To "chilkat123"
    Set ComSocksPassword Of hoFtp To "password123"

    //  Connect to the FTP server
    Get ComConnectOnly Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Authenticate with the FTP server.
    Get ComLoginAfterConnectOnly Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Change to the remote directory where the file will be uploaded.
    Get ComChangeRemoteDir Of hoFtp "junk" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Upload a file.
    Move "/temp/hamlet.xml" To sLocalPath
    Move "hamlet.xml" To sRemoteFilename

    Get ComPutFile Of hoFtp sLocalPath sRemoteFilename To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  This closes the SSH channel within the SSH tunnel,
    //  and thus closes the connection with the FTP server.
    Get ComDisconnect Of hoFtp To iSuccess

    Showln "File Uploaded!"

    //  Stop the background listen/accept thread:
    Move True To iWaitForThreadExit
    Get ComStopAccepting Of hoTunnel iWaitForThreadExit To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Close the SSH tunnel (would also kick any remaining connected clients).
    Get ComCloseTunnel Of hoTunnel iWaitForThreadExit To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoTunnel To sTemp1
        Showln sTemp1
        Procedure_Return
    End



End_Procedure

 

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