How to catch errors correctly? server unreachable, fingerprint wrong, access denied, etc. :: Support Forum

cakruege Donor
Joined:: 2015-11-23
Posts:: 2

How to catch errors correctly? server unreachable, fingerprint wrong, access denied, etc.

2015-11-23 13:56

Hi,

I'm using this powershell code example:
library_powershell#module

I'm trying to differentiate between errors.
For example:
-host unreachable
-fingerprint wrong
-access denied

I replaced Exception with WinSCP.SessionRemoteException

catch [WinSCP.SessionRemoteException]
{
   Write-Host "WinSCP.SessionRemoteException"
    Write-Host $_.Exception.Message
    exit 1
}

but every of these 3 failures is a WinSCP.SessionRemoteException. -> didn't help

add failed handler:

function Failed
{
   param($e)
   
   $e
}

$session.add_Failed( { Failed($_) } )

Failed method didn't get called for every of these 3 failures -> didn't help

    finally
    {
        # Disconnect, clean up
        $session.output
        $session.Dispose()
    }

Session.output has the correct information but it's bad parseable text.
Sometimes it is the last line, sometimes not.

What do I do wrong?

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 42,479
Location:: Prague, Czechia

Re: How to catch errors correctly? server unreachable, fingerprint wrong, access denied, etc.

2015-11-24

The Session.Failed is called all these scenarios.

Indeed the mere $e expression does not yield any output. I do not know why, I do not know PowerShell good enough. But Write-Host $e does.
Anyway, it's the same information as you get from the exception, so it won't help.

The best you can do is to parse Exception message (not log).

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cakruege Donor
Joined:: 2015-11-23
Posts:: 2

Re: How to catch errors correctly? server unreachable, fingerprint wrong, access denied, etc.

2015-11-24 10:11

martin wrote:

Indeed the mere $e expression does not yield any output.

Thx. You're right.

martin wrote:

Anyway, it's the same information as you get from the exception, so it won't help.

Hmm, that's not what I wanted to hear :cry:

I'd like to suggest a new feature:
For example new exceptions types that inherit from SessionRemoteException
HostNotFoundException
WrongFingerprint
AccessDenied

or new Failure2-Event with proper states

martin wrote:

The best you can do is to parse Exception message (not log).

That would be my temporary solution

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martin◆ Site Admin

Re: How to catch errors correctly? server unreachable, fingerprint wrong, access denied, etc.

2015-11-27

OK, I'll consider that.

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How to catch errors correctly? server unreachable, fingerprint wrong, access denied, etc.