验证PowerShell

Question

我正在编写一个脚本来生成基于用户提供的变量值的文本文件。变量通过另一个应用程序提供，它们作为环境变量进入Windows。

所以我有以下内容：

[hashtable]$variables = @{InstallPath = $env:InstallPath; ADBaseOUValue1 = $env:ADBaseOUValue1; ADBaseOUValue2 = $env:ADBaseOUValue2; LDAPQueryValue1 = $env:LDAPQueryValue1; LDAPQueryValue2 = $env:LDAPQueryValue2}

此哈希表被截断，用户最多可以定义15个ADBaseOU和15个LDAP查询，并且还提供了其他变量，但它们都没有编号。

现在我需要验证数据。

1. 我需要确保ADBaseOUValue1和LDAPQueryValue1不为空
2. 我需要确保ADBaseOUValue1与正则表达式匹配
3. 我需要确保，如果LDAPQueryValue1的＆符号（＆amp;）未跟“amp;”，我将替换它们
4. 然后我需要为用户提供的任何ADBaseOUValue＃和LDAPQueryValue＃进行检查2和3。

我正在对其他变量（例如$ env：InstallPath）进行数据验证，以确保它们不为空且具有预期的数据类型。

在变量$ env：ADBaseOUValue2到15和$ env：LDAPQueryValue2到15中，我将如何：

1. 在对其正则表达式执行“If”检查时定义变量名称
2. 在执行“＆amp;”
的“替换”时定义变量名称

验证变量后，值将进入Here String，如：

<setting name="ADBaseOU1" serializeAs="String">
    <value>$env:ADBaseOUValue1</value>
</setting>
<setting name="ADBaseOU2" serializeAs="String">
    <value>$env:ADBaseOUValue2</value>
</setting>

谢谢，这就是我现在所拥有的（对于验证部分）：

Switch ($variables.GetEnumerator()) {
    {($_.Name -eq "ADBaseOUValue1") -and ($_.Value -ne $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was not a valid LDAP URL. Please re-run the script and provide a valid value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -eq "ADBaseOUValue1") -and ($_.Value -eq $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was null. Please re-run the script and provide a value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -match "ADBaseOUValue(\d+)$") -and ($_.Name -ne "ADBaseOUValue1") -and ($_.Value -ne $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was not a valid LDAP URL. Please re-run the script and provide a valid value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -eq "LDAPQueryValue1") -and ($_.Value -ne $null)} {
        If ($env:LDAPQueryValue1 -notmatch "&") {
            Write-Host ("{0}: Replacing `"&`" with `"&`" in {1}." -f (Get-Date -Format s), $_.Name)

            $env:LDAPQueryValue1 = $env:LDAPQueryValue1.Replace("&", "&")
        }
    }
    {($_.Name -eq "LDAPQueryValue1") -and ($_.Value -eq $null)} {
        If ($env:ADBaseOUValue1 -notmatch $ldapUrlRegex) {
            Write-Host ("{0}: The variable `"{1}`" was null. Please re-run the script and provide a value for the variable." -f (Get-Date -Format s), $_.Name)

            $variableErrorCount++
        }
    }
    {($_.Name -match "LDAPQueryValue(\d+)$") -and ($_.Name -ne "LDAPQueryValue1") -and ($_.Value -ne $null)} {
        If ($env:??? -notmatch "&") {
            Write-Host ("{0}: Replacing `"&`" with `"&`" in {1}." -f (Get-Date -Format s), $_.Name)

            $env:??? = $env:???.Replace("&", "&")
        }
    }
}

Answer 1

听起来你需要的是变量间接，即通过存储在变量中的名称来间接访问环境变量 ; e.g：

$env:Foo = 'bar' # sample env. var.

$varName = 'Foo' # the name of that env. var to use for indirect access

# To GET the value, via PS drive Env:
(Get-Item Env:$varName).Value # same as: $env:Foo

# To SET the value:
Set-Item Env:$varName 'new value' # same as: $env:Foo = 'new value'

在你的命令背景下：

# ...

{$_.Name -match "LDAPQueryValue(\d+)$") -and ($_.Name -ne "LDAPQueryValue1") -and ($_.Value -ne $null)} {
  $currVal = (Get-Item Env:$($_.Name)).Value
  If ($currVal -notmatch "&") {
      Write-Host ("{0}: Replacing `"&`" with `"&`" in {1}." -f (Get-Date -Format s), $_.Name)

      Set-Item Env:$($_.Name) $currVal.Replace("&", "&")
  }
}

# ...