Powershell v2.0 Using Multiple Threads

The main idea of ​​the script: Hello. I created a powershell script that I use to check the files of some executable files and then save them in a text file. The next time you run the script, if the file size is different, it will replace the one in the text file with a new one.

Structure: I have a main script and a folder containing many scripts, each for each executable, from which I want to check the file size. Thus, the scripts in the folder return a string containing a link to the executable file, which will be transferred to the main script.

The code:

$progdir = "C:\script\programms"
$items = Get-ChildItem -filter *.ps1 -Path $progdir
$webclient = New-Object System.Net.WebClient

$filesizes = get-content C:\updatechecker\programms\filesizes
if ($filesizes.length -ne $items.length) { 
    if ($filesizes.length -eq $null) {
        Write-Host ("Building filesize database...") -nonewline
    } 
    else { 
        Write-Host ("Rebuilding filesize database...") -nonewline 
    }
    clear-content  C:\programms\filesizes

    for ($i=0; $i -le $items.length-1; $i++) {
        $command = "c:\programms\" + $items[$i].name
        $link = & $command
        $webclient.OpenRead($link) | Out-Null
        $filesize = $webclient.ResponseHeaders["Content-Length"]
        $filesize >> C:\programms\filesizes
    }
    echo "Done." 
} 
else {
    ...

: - , . , , PowerShell. , , ( , , , filesizes). , , - . omp powershell?: P

, , , :)

:

Get-Job | Remove-Job -Force
$progdir = "C:\programms"
$items = Get-ChildItem -filter *.ps1 -Path $progdir
$webclient = New-Object System.Net.WebClient
$filesizes = get-content C:\programms\filesizes

$jobWork = {
    param ($MyInput)
    $command = "c:\programms\" + $MyInput
    $link = & $command
    $webclient.OpenRead($link) | Out-Null
    $filesize = $webclient.ResponseHeaders["Content-Length"]
    $filesize >> C:\programms\filesizes

}
foreach ($item in $items) {

    Start-Job -ScriptBlock $jobWork -ArgumentList $item.name | out-null
}

Get-Job | Wait-Job
Get-Job | Receive-Job | Out-GridView | out-null
echo "Done."

2: : http://ryan.witschger.net/?p=22

$mutex = new-object -TypeName System.Threading.Mutex -ArgumentList $false, "RandomGlobalMutexName";
$MaxThreads = 4
$SleepTimer = 500


$jobWork = {
    param ($MyInput)
    $webclient = New-Object System.Net.WebClient
    $command = "c:\programms\" + $MyInput
    $link = & $command
    $webclient.OpenRead($link) | Out-Null

    $result = $mutex.WaitOne();

    $file = $webclient.ResponseHeaders["Content-Length"]
    $file >> C:\programms\filesizes

    $mutex.ReleaseMutex();
}

$progdir = "C:\programms"
$items = Get-ChildItem -filter *.ps1 -Path $progdir
$webclient = New-Object System.Net.WebClient
$filesizes = get-content C:\programms\filesizes

Get-Job | Remove-Job -Force

$i = 0

ForEach ($item in $items){
    While ($(Get-Job -state running).count -ge $MaxThreads){

        Start-Sleep -Milliseconds $SleepTimer
    }

    $i++
    Start-Job -ScriptBlock $jobWork -ArgumentList $item.name | Out-Null


}