(VBScript) Multiple SendReqExec on Same Connection

Shows how to execute a series of commands on an SSH server and retrieve each command's output (using SendReqExec). Each call to SendReqExec requires its own logical channel. This is not a separate SSH connection -- it's simply a new session channel on the existing SSH connection.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

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

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Ssh")
set ssh = CreateObject("Chilkat.Ssh")

' Hostname may be an IP address or domain:
hostname = "172.16.16.46"
port = 22

success = ssh.Connect(hostname,port)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' If receiving output from a command stalls for more than 5 seconds, then stop waiting.
ssh.IdleTimeoutMs = 5000

' Authenticate using login/password:
success = ssh.AuthenticatePw("myLogin","myPassword")
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Open a session channel.  (It is possible to have multiple
' session channels open simultaneously.)
channelNum = ssh.OpenSessionChannel()
If (channelNum < 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Request a directory listing on the remote server:
' If your server is Linux/UNIX, change the string from "dir" to "ls"
' Note: Some SSH servers require a CRLF instead of a bare-LF
cmd = "ls -al" & vbLf
success = ssh.SendReqExec(channelNum,cmd)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Read whatever output may already be available on the
' SSH connection.  ChannelReadAndPoll returns the number of bytes
' that are available in the channel's internal buffer that
' are ready to be "picked up" by calling GetReceivedText
' or GetReceivedData.
' A return value of -1 indicates failure.
' A return value of -2 indicates a failure via timeout.

' The ChannelReadAndPoll method waits
' for data to arrive on the connection usingi the IdleTimeoutMs
' property setting.  Once the first data arrives, it continues
' reading but instead uses the pollTimeoutMs passed in the 2nd argument:
' A return value of -2 indicates a timeout where no data is received.
pollTimeoutMs = 2000
n = ssh.ChannelReadAndPoll(channelNum,pollTimeoutMs)
If (n < 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Close the channel:
success = ssh.ChannelSendClose(channelNum)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Perhaps we did not receive all of the commands output.
' To make sure,  call ChannelReceiveToClose to accumulate any remaining
' output until the server's corresponding "channel close" is received.
success = ssh.ChannelReceiveToClose(channelNum)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Get the accumulated output of the command:

cmdOutput = ssh.GetReceivedText(channelNum,"ansi")
If (ssh.LastMethodSuccess = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

' Display the remote shell's command output:
outFile.WriteLine(cmdOutput)
outFile.WriteLine("----")

' -----------------------------------------------------------------
' Now for the 2nd SendReqExe (on the same connection,
' but on a separate logical channel).
' -----------------------------------------------------------------

channelNum = ssh.OpenSessionChannel()
If (channelNum < 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

cmd = "nslookup chilkatsoft.com" & vbLf
success = ssh.SendReqExec(channelNum,cmd)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

pollTimeoutMs = 2000
n = ssh.ChannelReadAndPoll(channelNum,pollTimeoutMs)
If (n < 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

success = ssh.ChannelSendClose(channelNum)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

success = ssh.ChannelReceiveToClose(channelNum)
If (success = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

cmdOutput = ssh.GetReceivedText(channelNum,"ansi")
If (ssh.LastMethodSuccess = 0) Then
    outFile.WriteLine(ssh.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine(cmdOutput)

outFile.Close