Does "if any" in a foreach loop exist? - powershell

Question

I am trying to comb through a WebServer's app pools to detect the HTTP Response codes of each app. I am using a foreach loop to check for the response to be 200, but if one of the responses is something other than a 200 I need the foreach loop to continue and check all the other app pools.
$appPool = Get-WebApplication
foreach ($a in $appPool) {
$app = $a.Attributes[0].Value;
$url = "http://localhost$app/apitest/index"
$HTTP_Request = [System.Net.WebRequest]::Create($url)
$HTTP_Response = try{
$HTTP_Request.GetResponse()
} catch {
$exceptionMessage = $_.Exception.Message
$exceptionItem = $app
}
$HTTP_Status = [int]$HTTP_Response.StatusCode
if ($HTTP_Status -eq 200) {
$errorcode = 0
} elseif ($HTTP_Status -ne 200) {
$errorcode = 1
} else {
$errorcode = 2
}
}
I'm finding that it doesn't matter what any app pools return because the loop just exits with whatever the last app returns. If app 3 returns a 503 but the last app returns a 200, then the foreach loop returns a 200 and exits with $errorcode = 0.
How do I change this code to check all app pools but exit with a different error code if an app in the middle does not have a 200 status code?

Answer 1

One way you can do this is to embrace the returned booleans as a list and just check that the list contains the value. For example:
$results = foreach($n in 1..10) {
$n -eq 5
}
if ($results -contains $true) {
Write-Host "There was a 5"
}
For your example, I guess:
$appPool = get-webapplication
$results = foreach($a in $appPool) {
$app = $a.Attributes[0].Value;
$url = "http://localhost$app/apitest/index"
$HTTP_Request = [System.Net.WebRequest]::Create($url)
$HTTP_Response = try {
$HTTP_Request.GetResponse()
} catch {
$exceptionMessage = $_.Exception.Message
$exceptionItem = $app
}
[int]$HTTP_Response.StatusCode -ne 200
}
if ($results -contains $true) {
$errorcode = 1
} else {
$errorcode = 0
}
I didn't want to clutter the example, but I might actually just do:
$errorcode = $results -contains $true -as [int]

Answer 2

I would pre-set $errorcode before entering the loop, and change its value only when the status code for a request is not 200.
$errorcode = 0
foreach ($a in $appPool) {
...
if ($HTTP_Response.StatusCode.value__ -ne 200) {
$errorcode = 1
}
}