任务计划程序创建由脚本文件生成的损坏版本

Question

我一直在用 Powershell 做一个小项目。我的任务是创建一个脚本，该脚本将从邮件附件中收集所有文件，将所有 .pdf 文件合并为一个并将生成的文件发送到我的电子邮件。
该脚本在 Powershell ISE 中完全正常工作，但是当我尝试从任务计划程序运行它时，合并的 .pdf 文件已损坏，其中没有任何数据。
请记住，我对这些东西很陌生。

这是我完成所有繁重工作的主要代码：

    function getAttachments
    {
    #########################################################
    ##-----------------------------------------------------## 
    ##                GET ATTACHMENTS                      ## 
    ##-----------------------------------------------------## 
    #########################################################

    ##PATH TO CREDENTIAL
    $credpath = "C:\Users\" + $env:UserName + "\Documents\myCred_${env:USERNAME}_${env:COMPUTERNAME}.xml"

    #test variable
    $test = Test-Path $credpath

    ##TEST IF CREDENTIAL EXISTS
    if(!$test){
    ## USER PROMPT PSW  CREDENTIAL ## 
        $cred = Get-Credential 

        #save credential in documents
        $cred | Export-CliXml -Path $credpath
    }else{
    ##READ USER CREDENTIAL FROM FILE
        $cred = Import-CliXml -Path $credpath
    }

    ##url and date variables
    $url = "https://outlook.office365.com/api/v1.0/me/messages" 

    $d = [DateTime]::Today.AddDays(-1)
    $global:date = $d.ToString("yyyy-MM-dd")

    ## Get all messages that have attachments where received date is greater than $date  
    $messageQuery = "" + $url + "?`$select=Id&`$filter=HasAttachments eq true and DateTimeReceived ge " + $date 
    $messages = Invoke-RestMethod $messageQuery -Credential $cred 

    ## Loop through each results 
    foreach ($message in $messages.value) 
    { 
        # get attachments and save to file system 
        $query = $url + "/" + $message.Id + "/attachments" 
        $attachments = Invoke-RestMethod $query -Credential $cred 

        # in case of multiple attachments in email 
        foreach ($attachment in $attachments.value) 
        { 
            Write-Host “Found File :- ” $attachment.Name
            $path = "c:\Attachments\" + $attachment.Name 

            $Content = [System.Convert]::FromBase64String($attachment.ContentBytes) 
            Set-Content -Path $path -Value $Content -Encoding Byte 
        } 
    } 
}

    function sendAttachments
    {
    #############################################################
    ##---------------------------------------------------------##
    ##          SEND ATTACHMENTS AND DELETE FILES              ##
    ##---------------------------------------------------------##
    #############################################################

    #Connection Details

    #PATH TO CREDENTIAL
    $credpath = "C:\Users\" + $env:UserName + "\Documents\myCred_${env:USERNAME}_${env:COMPUTERNAME}.xml"
    $cred = Import-CliXml -Path $credpath

    $smtpServer = “ smtp.office365.com”

    $msg = new-object Net.Mail.MailMessage 

    #Change port number for SSL to 587
    $smtp = New-Object Net.Mail.SmtpClient($SmtpServer, 25) 

    #Uncomment Next line for SSL  
    $smtp.EnableSsl = $true

    $smtp.Credentials = $cred

    $msg.IsBodyHtml = $true

    #From Address
    $msg.From = $cred.UserName
    #To Address, Copy the below line for multiple recipients
    $msg.To.Add(“email@gmail.com”)

    #Message Body
    $msg.Body=”<h2>Alle attachments samen bevinden zich in de bijlage van did email</h2> <br/><br/>”

    #Message Subject
    $msg.Subject = “no-reply: Email met alle attachments”

    #your file location
    $files=Get-ChildItem “C:\Attachments\”

    #attach the right file
    $file = $global:pname
    Write-Host “Attaching File :- ” $file
    $attachment = New-Object System.Net.Mail.Attachment –ArgumentList C:\Attachments$file
    $msg.Attachments.Add($attachment)

    #send email
    $smtp.Send($msg)
    $attachment.Dispose();
    $msg.Dispose();

    #delete the files from the folder
    Get-ChildItem -Path C:\Attachments -Include * -File -Recurse | foreach { $_.Delete()}
     }

function mergePDF
{
#############################################################
##---------------------------------------------------------##
##                MERGE ALL PDF FILES                      ##
##---------------------------------------------------------##
#############################################################
    $workingDirectory = "C:\Attachments"
    $itspath = $PSScriptRoot
    $global:pname = $global:date + "_pdfAttachments.pdf"
    $pdfs = ls $workingDirectory -recurse | where {-not $_.PSIsContainer -and $_.Extension -imatch "^\.pdf$"};

    [void] [System.Reflection.Assembly]::LoadFrom([System.IO.Path]::Combine($itspath, 'itextsharp.dll'));

    $output = [System.IO.Path]::Combine($workingDirectory, $pname);
    $fileStream = New-Object System.IO.FileStream($output, [System.IO.FileMode]::OpenOrCreate);
    $document = New-Object iTextSharp.text.Document;
    $pdfCopy = New-Object iTextSharp.text.pdf.PdfCopy($document, $fileStream);
    $document.Open();

    foreach ($pdf in $pdfs) {
        $reader = New-Object iTextSharp.text.pdf.PdfReader($pdf.FullName);
        [iTextSharp.text.pdf.PdfReader]::unethicalreading = $true
        $pdfCopy.AddDocument($reader);
        $reader.Dispose();
    }
    $document.Close()
    $pdfCopy.Dispose();
    $document.Dispose();
    $fileStream.Dispose();
}
getAttachments
Start-Sleep -s 10
mergePDF
Start-Sleep -s 10
sendAttachments

在我运行在另一个脚本文件中的这段代码中，我创建了一个新任务：

#############################################################
##---------------------------------------------------------##
##          SCHEDULE SCRIPTS IN WINDOWS TASKS              ##
##---------------------------------------------------------##
#############################################################

##PATH TO CREDENTIAL
$credpath = "C:\Users\" + $env:UserName + "\Documents\myCred_${env:USERNAME}_${env:COMPUTERNAME}.xml"

#test variable
$test = Test-Path $credpath

##TEST IF CREDENTIAL EXISTS
if(!$test){
## USER PROMPT PSW  CREDENTIAL ## 
    $cred = Get-Credential

    #save credential in documents
    $cred | Export-CliXml -Path $credpath
}

$taskName = "ManageEmailAttachments"
$taskExists = Get-ScheduledTask | Where-Object {$_.TaskName -like $taskName }

if($taskExists) 
{
   Get-ScheduledJob ManageEmailAttachments
   Unregister-ScheduledJob ManageEmailAttachments
   $wshell = New-Object -ComObject Wscript.Shell
   $wshell.Popup("Task successfully deleted, run the script again to schedule the task",0,"Done",0x0)
} 
else 
{
    $tt = Get-Date
    $tt = $tt.AddMinutes(1)
    $testtime = $tt.ToString("HH:mm:ss")

    #set trigger
    $trigger = New-JobTrigger -Daily -At "1:00"
    $testtrigger = New-JobTrigger -Daily -At $testtime

    #path to the scripts
    $scriptPath = $PSScriptRoot + "\wps_manage_pdf_attachments.ps1"


    #options(optional)
    $option = New-ScheduledJobOption -WakeToRun: $true

    #create a new task
    Register-ScheduledJob -Name ManageEmailAttachments -FilePath $scriptPath -Trigger  $testtrigger -ScheduledJobOption $option 
}

Powershell 中运行时的脚本运行良好，它从邮箱中获取所有附件，将它们合并为 1 个 .pdf 文件并将它们发送到请求的电子邮件地址。但是当在 windows 任务调度程序中调度时，它可以很好地执行第一步，但是在合并时，.pdf 文件已损坏，没有任何内容。

我不知道如何让它工作，所以我在论坛上发了一个问题。希望大家想办法解决。

提前致谢

Answer 1

使用下面的函数获取脚本根目录。函数获取脚本目录 { $Invocation = (Get-Variable MyInvocation -scope 1).Value 拆分路径 $Invocation.MyCommand.Path } $scriptPath=Join-Path(Get-ScriptDirectory) 'wps_manage_pdf_attachments.ps1'

Answer 2

显然，问题嵌套在主代码中。我用过：

Try{...} 
Catch{$_ | Out-File C:\errors.txt}

在 mergePDF 函数中找出错误所在。似乎我 ITextSharp.dll 的路径不正确。我使用的 $PSScriptRoot 显示 "C:\windows\windows32" 而不是脚本实际所在的位置。

所以我所做的是在我的批处理文件中添加一行以将 itextsharp.dll 复制到 %Temp%:

xcopy Scripts\itextsharp.dll %Temp% /D >NUL 2>NUL

然后从那里读取文件：

$itsPath = [System.IO.Path]::GetTempPath()

一切正常。我知道这不是最好的方法，但我之前有这个批处理文件，只需双击它即可制作脚本运行。所以加一点线也没什么坏处。

我希望这对遇到同样问题的人有所帮助。

任务计划程序创建由脚本文件生成的损坏版本

Task scheduler creates corrupted version of generated by script file

powershell

schedule

file

task