Chapters/basic-debugging/Exercise.ps1
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#this version is broken in several ways Function Get-TMRemoteListeningConfiguration { [cmdletbinding()] Param( [Parameter(ValueFromPipelineByValue, Mandatory)] [ValidateNotNullorEmpty()] [Alias("CN")] [string]$Computername, [string]$ErrorLog ) Begin { Write-Information "Command = $($myinvocation.mycommand)" -Tags Meta Write-Information "PSVersion = $($PSVersionTable.PSVersion)" -Tags Meta Write-Information "User = $env:userdomain\$env:username" -tags Meta Write-Information "Computer = $env:computername" -tags Meta Write-Information "PSHost = $($host.name)" -Tags Meta Write-Information "Test Date = $(Get-Date)" -tags Meta #define a private function to write the verbose messages Function WV { Param($prefix, $message) $time = Get-Date -f HH:mm:ss.ffff Write-Verbose "$time [$($prefix.padright(7,' '))] $message" } WV -prefix BEGIN -message "Starting $($myinvocation.MyCommand)" if ($errorlog) { WV BEGIN "Errors will be logged to $ErrorLog" $outParams = @{ FilePath = $ErrorLog Encoding = "ascii" Append = $True ErrorAction = "stop" } } #define a ordered hashtable of ports so that the testing #goes in the same order $ports = [ordered]@{ WSManHTTP = 5985 WSManHTTPS = 5986 SSH = 22 } #initialize an splatting hashtable $testParams = @{ Port = "" Computername = "" WarningAction = "SilentlyContinue" #changed variable to not be confusing with helper function WarningVariable = "warn" } #keep track of total computers tested $total = 0 #keep track of how long testing takes $begin = Get-Date } #begin Process { foreach ($computerr in $computername) { #assume the computer can be reached $ok = $True $total+1 #make the computername all upper case $testParams.Computername = $computer.ToUpper() WV PROCESS "Testing $($testParams.Computername)" #define the hashtable of properties for the custom object $props = [ordered]@{ Computername = $testparams.Computername Date = Get-Date } #this array will be used to store passed ports #It is used by Write-Information $passed = @() #enumerate the hashtable foreach ($item in $ports.GetEnumerator()) { $testParams.Port = $item.Value WV "PROCESS" "Testing port $($testparams.port)" $test = Test-NetConnection @testParams if ($warn -match "Name resolution of $($testParams.computername) failed") { $msg = "[$(Get-Date)] $warn" if ($ErrorLog) { Try { $msg | Out-File @outParams } Catch { Write-Warning "Failed to log error. $($_.exception.message)" } } #if errorlog $ok = $False #break out of the ForEach loop break } WV PROCESS "Adding results" $props.Add($item.name, $test.TCPTestSucceeded) if ($test.TCPTestSucceeded) { $passed += $testParams.Port } if (-NOT $props.Contains("RemoteAddress")) { wv "PROCESS" "Adding RemoteAddress $($test.remoteAddress)" $props.Add("RemoteAddress", $test.RemoteAddress) } } #foreach port if ($ok) { WV PROCESS "Generating an object for $($testparams.computername)" Write-Information "$($testParams.Computername) = $($passed -join ',')" -Tags data $obj = New-Object -TypeName PSObject -Property $props Write-Output $obj } } #foreach computer } #process End { $runtime = New-TimeSpan -Start (Get-Date) -End $end WV END "Processed $total computer(s) in $runtime" #display a warning if errors would captured if (Test-Path -Path $ErrorLog) { Write-Warning "Errors were detected. See $ErrorLog." } WV END "Ending $($myinvocation.mycommand)" } #end } #Get-TMRemoteListeningConfiguration |