(DataFlex) SSH Parallel Remote Commands on Single Server

Shows how to execute multiple commands in parallel on a single SSH server and retrieve the command output for each.

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 iChannel1
    Integer iChannel2
    Integer iChannel3
    Integer iPollTimeoutMs
    Integer iNumFinished
    Integer iChannel
    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 several commands on the server.
    Get ComQuickCmdSend Of hoSsh "df" To iChannel1
    If (iChannel1 < 0) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComQuickCmdSend Of hoSsh "date" To iChannel2
    If (iChannel2 < 0) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComQuickCmdSend Of hoSsh "echo hello world" To iChannel3
    If (iChannel3 < 0) Begin
        Get ComLastErrorText Of hoSsh To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Now collect the results of each command.
    Move 50 To iPollTimeoutMs
    Move 0 To iNumFinished
    While (iNumFinished < 3)
        // Check to see if anything has finished.
        // QuickCmdCheck returns -1 if there are no errors and nothing else finished
        // QuickCmdCheck returns -2 if there was an error (such as a lost connection)
        // QuickCmdCheck returns a channel number if a channel finished.
        Get ComQuickCmdCheck Of hoSsh iPollTimeoutMs To iChannel
        If (iChannel = -2) Begin
            Get ComLastErrorText Of hoSsh To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        If (iChannel >= 0) Begin
            Showln "---- channel " iChannel " finished ----"
            Get ComGetReceivedText Of hoSsh iChannel "ansi" To sTemp1
            Showln sTemp1
            Move (iNumFinished + 1) To iNumFinished
        End

    Loop

    // --------------
    // Sample output:

    // 	---- channel 105 finished ----
    // 	hello world
    // 
    // 	---- channel 104 finished ----
    // 	Thu Dec 22 17:43:58 CST 2016
    // 
    // 	---- channel 103 finished ----
    // 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
    // 	/dev/disk2    2176716032 265739728 1910464304    13% 33281464 238808038   12%   /
    // 	devfs                382       382          0   100%      662         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


End_Procedure