This script runs under Powershell Windows, USES Curl and I made an attempt at a Powershell version of the Blat command line:

Code: [Select]$url = "url.txt"
$not_ok_url = "not_ok_url.txt"
$work = "response.txt"

[regex] $regex = @"
(?smi)(.*200\sOK)
"@

if ( Test-Path $not_ok_url ) { REMOVE-Item $not_ok_url }

Get-Content $url | foreach {
$site = $_
Start-Process -FilePath "curl.exe" -ArgumentList "-I -s $_" -NoNewWindow -RedirectStandardOutput $work -Wait
$response = Get-Content $work -Raw
if ( $response -match $regex) {
Write-Output "$site ... OK"
} else {
Write-Output "$site ... NOK"
("-" * 75) | Out-File -FilePath $not_ok_url -Append -encoding ascii
$site | Out-File -FilePath $not_ok_url -Append -encoding ascii
("-" * 75) | Out-File -FilePath $not_ok_url -Append -encoding ascii
$response | Out-File -FilePath $not_ok_url -Append -encoding ascii
}
if ( Test-Path $work ) { Remove-Item $work }
}

# if ( Test-Path($not_ok_url) ) {
# $sender =
# $log =
# $smtp =
# Start-Process -FilePath "blat.exe" -ArgumentList "$sender -subject 'URLs DOWN STATUS' -body 'please check the attachment for the Application DOWN error logs' $smtp -attach 'C:\Not_OK_URL.txt' $log -to '[email protected]'
# }

You can tweak the paths at the top of the script. The Blat section is commented out but if remove the COMMENT marks (#) and fill in the values for the variables, it just might work.