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(Xojo Plugin) SSH Exec (Execute Command Line)

Shows how to execute a command on an SSH server and retrieve the command output.

Chilkat Xojo Plugin Download

Xojo Plugin for Windows, Linux, Mac OS X, and ARM

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

Dim ssh As New Chilkat.Ssh

// Connect to an SSH server:
Dim hostname As String
Dim port As Int32

// Hostname may be an IP address or hostname:
hostname = "192.168.1.108"
port = 22

Dim success As Boolean
success = ssh.Connect(hostname,port)
If (success <> True) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Wait a max of 5 seconds when reading responses..
ssh.IdleTimeoutMs = 5000

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

// Open a session channel.  (It is possible to have multiple
// session channels open simultaneously.)
Dim channelNum As Int32
channelNum = ssh.OpenSessionChannel()
If (channelNum < 0) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// The SendReqExec method starts a command on the remote
// server.   The syntax of the command string depends on the
// default shell used on the remote server to run the command.
// On Windows systems it is CMD.EXE.  On UNIX/Linux
// systems the user's default shell is typically defined in /etc/password.

// Here are some examples of command lines for <b>Windows SSH servers</b>:

// Get a directory listing:
Dim cmd1 As String
cmd1 = "dir"

// Do a nameserver lookup:
Dim cmd2 As String
cmd2 = "nslookup chilkatsoft.com"

// List a specific directory.  Given that the shell is CMD.EXE, backslashes must
// be used:
Dim cmd3 As String
cmd3 = "dir \temp"

// Execute a sequence of commands.  The syntax for CMD.EXE may be found
// here: http://technet.microsoft.com/en-us/library/bb490880.aspx.  Notice how the commands
// are separated by "&&" and the entire command must be enclosed in quotes:
Dim cmd4 As String
cmd4 = """cd \temp&&dir"""

// Here are two examples of command lines for <b>Linux/UNIX SSH servers</b>:

// Get a directory listing:
Dim cmd5 As String
cmd5 = "ls -l /tmp"

// Run a series of commands (syntax may depend on your default shell):
Dim cmd6 As String
cmd6 = "cd /etc; ls -la"

// Request a directory listing on the remote server:
// If your server is Windows, change the string from "ls" to "dir"
success = ssh.SendReqExec(channelNum,"ls")
If (success <> True) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Call ChannelReceiveToClose to read 
// output until the server's corresponding "channel close" is received.
success = ssh.ChannelReceiveToClose(channelNum)
If (success <> True) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Let's pickup the accumulated output of the command:
Dim cmdOutput As String
cmdOutput = ssh.GetReceivedText(channelNum,"ansi")
If (ssh.LastMethodSuccess <> True) Then
    System.DebugLog(ssh.LastErrorText)
    Return
End If

// Display the remote shell's command output:
System.DebugLog(cmdOutput)

// Disconnect
ssh.Disconnect 

 

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