(Xojo Plugin) SSH Parallel Remote Commands on Single Server

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

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim ssh As New Chilkat.Ssh

Dim port As Int32
port = 22
Dim success As Boolean
success = ssh.Connect("the-ssh-server.com",port)
If (success <> True) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Authenticate using login/password:
success = ssh.AuthenticatePw("theSshLogin","theSshPassword")
If (success <> True) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Start several commands on the server.
Dim channel1 As Int32
channel1 = ssh.QuickCmdSend("df")
If (channel1 < 0) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

Dim channel2 As Int32
channel2 = ssh.QuickCmdSend("date")
If (channel2 < 0) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

Dim channel3 As Int32
channel3 = ssh.QuickCmdSend("echo hello world")
If (channel3 < 0) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Now collect the results of each command.
Dim pollTimeoutMs As Int32
pollTimeoutMs = 50
Dim numFinished As Int32
numFinished = 0
While numFinished < 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.
    Dim channel As Int32
    channel = ssh.QuickCmdCheck(pollTimeoutMs)
    If (channel = -2) Then
        System.DebugLog(ssh.LastErrorText)
        Return
    End If

    If (channel >= 0) Then
        System.DebugLog("---- channel " + Str(channel) + " finished ----")
        System.DebugLog(ssh.GetReceivedText(channel,"ansi"))
        numFinished = numFinished + 1
    End If

Wend

// --------------
// 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