DataFlex

SFTP Change Directory

See more SFTP Examples

This example answers a common question: "I use Chilkat SFTP to upload a file. It says it was successful, but file is not on the server. How do you change directories?";

First, "SFTP" is Secure File Transfer over SSH and has *nothing* to do with FTP (the File Transfer Protocol). It is completely unrelated to FTP. Therefore, FTP concepts such as "current directory", and "binary/ascii transfer modes" don't exist in SFTP.

In SFTP, you authenticate using a user account on the remote server. This could be an actual user account on the server, or a logical user account that exists in the context of the SSH server. In either case, the user account has a home directory. If you open a file on the SSH/SFTP server using only the filename and no path, then your filename will be placed in the user account's home directory. To find out the location of the home directory, call RealPath and pass "." for the directory path. It will return the absolute path of the home directory.

Given that there is no "current directory" concept in SFTP, you must specify either an absolute path or relative path when opening/creating a file that is to be in a directory other than the account's home directory. A relative path is relative to the home directory.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoSftp
    String sAbsPath
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatSFtp)) To hoSftp
    If (Not(IsComObjectCreated(hoSftp))) Begin
        Send CreateComObject of hoSftp
    End

    // Set some timeouts, in milliseconds:
    Set ComConnectTimeoutMs Of hoSftp To 5000
    Set ComIdleTimeoutMs Of hoSftp To 10000

    // Connect to the SSH server.  
    Get ComConnect Of hoSftp "sftp.example.com" 22 To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Authenticate with the SSH server.  Chilkat SFTP supports
    // both password-based authenication as well as public-key
    // authentication.  This example uses password authenication.
    Get ComAuthenticatePw Of hoSftp "myLogin" "myPassword" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // After authenticating, the SFTP subsystem must be initialized:
    Get ComInitializeSftp Of hoSftp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // To find the full path of our user account's home directory,
    // call RealPath like this:

    Get ComRealPath Of hoSftp "." "" To sAbsPath
    Get ComLastMethodSuccess Of hoSftp To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoSftp To sTemp1
        Showln sTemp1
        Procedure_Return
    End
    Else Begin
        Showln sAbsPath
    End



End_Procedure