Question

我正在研究PowerShell脚本的错误处理方法。我通过catch上的try / catch传递错误，但是我想从命令行中调用原始params来创建错误日志和错误电子邮件。

这是我到目前为止所拥有的：

# --params--
param(
  [string]$Directory,
  [string]$ArchiveDirectory,
  [string]$ErrorDirectory,
  [string]$ErrorEmailFrom,
  [string]$ErrorEmailTo,
  [string]$ErrorEmailSubject,
  [string]$ErrorSMTP,
  [string]$FTPSite,
  [string]$FTPUser,
  [string]$FTPPass,
  [string]$FTPRemoteDir
)

# list of arguments for debug
$paramList = $args

# --functions--

function Handle-MyError
{
  Write-Host "handle-error"
  Write-Host $args[0];  # this is the exception passed in

  # -Email alert-
  $subject = $ErrorEmailSubject + $FTPSite 
  # build message
  $message =  Get-Date -Format "yyyy-mm-dd hh:mm:ss" 
  $message += "`r`nError: " + $FTPSite + " : " + $args[0]
  $message += "`r`nParameters:`r`n" 

  # Grab each parameter value, using Get-Variable
  for ($i=0;$i -lt $paramList.Length; $i++)
  {
    $message += $paramList[$i]
  }

  # send email
  $smtp = New-Object Net.Mail.SmtpClient($ErrorSMTP)
  $smtp.Send($ErrorEmailFrom, $ErrorEmailTo, $subject, $message)

  # drop error file
  $theDate = Get-Date -Format "yyyymmdd"
  $errorFile = $ErrorDirectory + "\" + $theDate + "_ERROR.txt"
  Write-Host $errorFile
  $message | Out-File $errorFile -Append
}

和我的try / catch：

catch [Exception]
{
  Write-Host "SPOT 1"
  Handle-MyError $_.
}

在顶部，我尝试将原始$args保存为$paramList以便稍后循环，但它无效。在Handle-MyError方法中，$args成为传递的错误，因此我想如果我将原始$args保存为$paramList我可以稍后访问它，但它很难...想法？

Answer 1

有几种方式，按最差到最好：

将Get-Variable与Scope参数一起使用。范围编号可以不同，但应至少为2（Script->Catch->Handle-MyError）

function Handle-MyError
{
   Write-Host (Get-Variable -Name ErrorEmailFrom -ValueOnly -Scope 2)
}

使用$Script:前缀

function Handle-MyError
{
   Write-Host $Script:ErrorEmailFrom
}

使用$PSBoundParameters

# list of arguments for debug
$paramList = $PsBoundParameters

function Handle-MyError
{
   Param
   (
       $Exception,
       $Cfg
   )

   Write-Host $Cfg.ErrorEmailFrom
}

catch [Exception]
{
    Write-host "SPOT 1"
    Handle-MyError -Exception $_ -Cfg $paramList
}

使用splatting：

$paramList = $PsBoundParameters

function Handle-MyError
{
    Param
    (
        $Exception,
        $ErrorDirectory,
        $ErrorEmailFrom,
        $ErrorEmailTo,
        $ErrorEmailSubject,
        $ErrorSMTP
    )

    Write-Host $ErrorEmailFrom
}

catch [Exception]
{
    Write-host "SPOT 1"
    Handle-MyError @paramList -Exception $_
}

Answer 2

这是@beatcracker提供帮助后的最终代码。我结合了两块拼图。

我需要将初始参数保存在本地var和Two，（$paramList = $PsBoundParameters)

使用.GetEnumerator（）

访问此var / list

# --params--
param(
    [string]$Directory,
    [string]$ArchiveDirectory,
    [string]$ErrorDirectory,
    [string]$ErrorEmailFrom,
    [string]$ErrorEmailTo,
    [string]$ErrorEmailSubject,
    [string]$ErrorSMTP,
    [string]$FTPSite,
    [string]$FTPUser,
    [string]$FTPPass,
    [string]$FTPRemoteDir
)
# set params as var for debug later
$paramList = $PsBoundParameters

# --functions--

function Handle-MyError
{
    Write-Host "handle-error"
    #write-host "Exception:" $args[0];  # this is the exception passed in

    # -Email alert-

    # build subject
    $subject = $ErrorEmailSubject + " " + $FTPSite 

    # build message
    $message =  Get-Date -format s
    $message += "`r`nError Message: " + $args[0]
    $message += "`r`nParameters:`r`n" 

    $paramList.GetEnumerator() | ForEach-Object `
    {
        #Write-Host $_.Key "=" $_.Value
        if ($_.Key -ne "FTPPass"){
            $message += "`r`n" + $_
        }
    }
}

从内部方法访问$ args / params

2 个答案: