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DataFlex Examples

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(DataFlex) SSH Quick/Simple Shell Session

Demonstrates the simplified way to run multiple commands in a shell session on an SSH server.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoSsh
    Integer iPort
    Boolean iSuccess
    Integer iChannelNum
    Handle hoSbCommands
    String sTemp1

    //  This example assumes Chilkat SSH/SFTP to have been previously unlocked.
    //  See Unlock SSH for sample code.

    Get Create (RefClass(cComChilkatSsh)) To hoSsh
    If (Not(IsComObjectCreated(hoSsh))) Begin
        Send CreateComObject of hoSsh
    End

    Move 22 To iPort
    Get ComConnect Of hoSsh "the-ssh-server.com" iPort To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Authenticate using login/password:
    Get ComAuthenticatePw Of hoSsh "theSshLogin" "theSshPassword" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Start a shell session.
    //  (The QuickShell method was added in Chilkat v9.5.0.65)
    Get ComQuickShell Of hoSsh To iChannelNum
    If (iChannelNum < 0) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Construct a StringBuilder with multiple commands, one per line.
    //  Note: The line-endings are potentially important.  Some SSH servers may
    //  require either LF or CRLF line endings.  (Unix/Linux/OSX servers typically
    //  use bare-LF line endings.  Windows servers likely use CRLF line endings.)
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbCommands
    If (Not(IsComObjectCreated(hoSbCommands))) Begin
        Send CreateComObject of hoSbCommands
    End
    Get ComAppend Of hoSbCommands "echo hello world" + (character(10)) To iSuccess
    Get ComAppend Of hoSbCommands "date" + (character(10)) To iSuccess
    Get ComAppend Of hoSbCommands "df" + (character(10)) To iSuccess

    //  For our last command, we're going to echo a marker string that
    //  we'll use in ChannelReceiveUntilMatch below.
    //  The use of single quotes around 'IS' is a trick so that the output
    //  of the command is "THIS IS THE END OF THE SCRIPT", but the terminal echo
    //  includes the single quotes.  This allows us to read until we see the actual
    //  output of the last command.
    Get ComAppend Of hoSbCommands "echo THIS 'IS' THE END OF THE SCRIPT" + (character(10)) To iSuccess

    //  Send the commands..
    Get ComGetAsString Of hoSbCommands To sTemp1
    Get ComChannelSendString Of hoSsh iChannelNum sTemp1 "ansi" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  Send an EOF to indicate no more commands will be sent.
    //  For brevity, we're not checking the return values of each method call.
    //  Your code should check the success/failure of each call.
    Get ComChannelSendEof Of hoSsh iChannelNum To iSuccess

    //  Receive output up to our marker.
    Get ComChannelReceiveUntilMatch Of hoSsh iChannelNum "THIS IS THE END OF THE SCRIPT" "ansi" True To iSuccess

    //  Close the channel.
    //  It is important to close the channel only after receiving the desired output.
    Get ComChannelSendClose Of hoSsh iChannelNum To iSuccess

    //  Get any remaining output..
    Get ComChannelReceiveToClose Of hoSsh iChannelNum To iSuccess

    //  Get the complete output for all the commands in the session.
    Showln "--- output ----"
    Get ComGetReceivedText Of hoSsh iChannelNum "ansi" To sTemp1
    Showln sTemp1

    //  Here's our actual sample output:

    // 	Last login: Thu Dec 22 20:19:09 2016 from chilkat13
    // 
    // 	echo hello world
    // 	date
    // 	df
    // 	echo THIS 'IS' THE END OF THE SCRIPT
    // 	chilkatosx:~ chilkat$ echo hello world
    // 	hello world
    // 	chilkatosx:~ chilkat$ date
    // 	Thu Dec 22 20:30:48 CST 2016
    // 	chilkatosx:~ chilkat$ df
    // 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
    // 	/dev/disk2    2176716032 265768928 1910435104    13% 33285114 238804388   12%   /
    // 	devfs                383       383          0   100%      664         0  100%   /dev
    // 	map -hosts             0         0          0   100%        0         0  100%   /net
    // 	map auto_home          0         0          0   100%        0         0  100%   /home
    // 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome
    // 	chilkatosx:~ chilkat$ echo THIS 'IS' THE END OF THE SCRIPT
    // 	THIS IS THE END OF THE SCRIPT
    // 	chilkatosx:~ chilkat$


End_Procedure

 

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