Powershell-检查文件是否存在并包含字符串模式

Question

编写了这小部分代码来检查文件是否存在并包含字符串模式

try {
$SEL = Select-String -Path \\$serversPing\c$\Scripts\compare_result.txt -Pattern "no differences encountered" -ErrorAction SilentlyCOntinue
}catch{
    $ErrorMessage = $_.Exception.Message
    $FailedItem = $_.Exception.ItemName
}
Finally {
if ($SEL | Test-Path -ErrorAction SilentlyContinue){
    #write-host $serversPing $SEL.Pattern
    #write-host $serversPing $SEL
    if ($SEL.Pattern -eq "no differences encountered")
    {
       $SoftCheckResult = "ok"
    }
    else
    {
        $SoftCheckResult ="Verify"
    }

}
else{
    $SoftCheckResult =  "NotInScope"
}
}

但是，它没有做应做的事情。 首先，它部分识别路径存在，其次部分识别txt文件中的模式。 你能帮我么？

我怀疑在乘法服务器上（部分白点等）PATTER可以部分识别，但是如何跳过呢？

奇怪的是，它没有看到文件中缺少该模式，而是返回了NotinScope而不是“ Verify below”文件，没有此模式

在下面您可以看到正常模式

Answer 1

由于您在$serversPing使用复数形式，因此我怀疑此变量来自代码的较早部分，并且包含服务器的COLLECTION。

我将更改检查顺序，并从测试开始，以查看该服务器上是否存在该文件：

# As you mentioned a possible whitespace problem the pattern below uses regex `\s+` so multiple whitespace characters are allowed betwen the words.
$pattern = "no\s+differences\s+encountered"
foreach ($server in $serversPing) {
    if (Test-Connection $server -Count 1 -Quiet) {
        $filePath = Join-Path -Path "\\$server" -ChildPath 'c$\Scripts\compare_result.txt'
        if (Test-Path $filePath -PathType Leaf) {
            # -Quiet:       Indicates that the cmdlet returns a Boolean value (True or False), instead of a MatchInfo object. 
            #               The value is True if the pattern is found; otherwise, the value is False.
            if (Select-String -Path $filePath -Pattern $pattern -Quiet) {
                Write-Host "Pattern '$pattern' found in '$filePath'"
                $SoftCheckResult = "ok"
            }
            else {
                Write-Host "Pattern '$pattern' not found in '$filePath'"
                $SoftCheckResult = "Verify"
            }
        }
        else {
            Write-Host "File '$filePath' not found"
            $SoftCheckResult ="NotInScope"
        }
    }
    else {
            Write-Host "Server '$server' is off-line."
            $SoftCheckResult ="OffLine"
    }
}

我在foreach循环中添加了一个Test-Connection ，以首先查看服务器是否在线。 如果您之前已检查过该服务器，并且$serversPing变量仅包含联机且可访问的服务器，则可以跳过该服务器。

Answer 2

关于Select-String cmdlet的-Path，应将值放在“”之间：

$SEL = Select-String -Path "\\$serversPing\c$\Scripts\compare_result.txt" -Pattern "no differences encountered" -ErrorAction SilentlyCOntinue

编辑

这应该可以解决问题：

try {
    $SEL = Select-String -Path \\$serversPing\c$\Scripts\compare_result.txt -Pattern "no differences encountered" -ErrorAction SilentlyCOntinue
}catch{
    $ErrorMessage = $_.Exception.Message
    $FailedItem = $_.Exception.ItemName
}
Finally {
    if ($SEL){
        $SoftCheckResult = "ok"
    }
    else
    {
        $SoftCheckResult ="Verify"
    }
}

Answer 3

请尝试如下：

$SEL = "Fiile path location"
if ($SEL | Test-Path -ErrorAction SilentlyContinue){

if ($SEL Get-Content | Select-String -pattern "no differences encountered")
{

}
....
}

Answer 4

try
{
    $SEL = $null
    $SEL = Select-String -Path \\$serversPing\c$\Scripts\compare_result.txt -Pattern "no differences encountered" -ErrorAction Stop
    if ($SEL)
    {
        $SoftCheckResult = "ok"
    }
    else
    {
        $SoftCheckResult = "Verify"
    }
}
catch
{
    $ErrorMessage = $_.Exception.Message
    $FailedItem = $_.Exception.ItemName
    $SoftCheckResult = "NotInScope"
}
return $softCheckResult