VB.NET

Get Diagnostic JSON from the Last SSH Method Call

Demonstrates the Chilkat Ssh.GetLastJsonData method, which copies structured diagnostic information from the most recently called method into a JsonObject. The only argument is the JsonObject that receives the information.

Background: This gives machine-readable diagnostics as an alternative to parsing LastErrorText, which is useful for logging or automated error handling. Many methods produce little or no additional JSON, so expect an object that is sometimes nearly empty. Authentication passwords and private-key passphrases are never included, so the output is safe to log.

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VB.NET

Dim success As Boolean = False

'  Demonstrates the Ssh.GetLastJsonData method, which copies structured diagnostic information
'  from the most recently called method into a JsonObject.  The only argument is the JsonObject
'  that receives the information.

Dim ssh As New Chilkat.Ssh

Dim sshPort As Integer = 22
success = ssh.Connect("ssh.example.com",sshPort)
If (success = False) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


'  Normally you would not hard-code the password in source.  You should instead obtain it
'  from an interactive prompt, environment variable, or a secrets vault.
Dim password As String = "mySshPassword"

success = ssh.AuthenticatePw("mySshLogin",password)
If (success = False) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


Dim output As String = ssh.QuickCommand("uname -a","utf-8")
If (ssh.LastMethodSuccess = False) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(output)

'  Retrieve diagnostic details about the call that was just made.  Many methods produce little
'  or no additional JSON.  Passwords and private-key passphrases are never included.
Dim json As New Chilkat.JsonObject
ssh.GetLastJsonData(json)

json.EmitCompact = False
Debug.WriteLine(json.Emit())

ssh.Disconnect()