ping site until it is alive (usefull to warm up your site after a deploy)

check-site-alive.ps1

 param (
    [string]$url = "",
    [int]$maxRetries = 5
 )

$SecondsDelay = 10
$retrycount = 0
$completed = $false


while (-not $completed) {
    try {
        Write-Host ("Checking if site is reachable..")
        $result = Invoke-WebRequest -Uri $Uri -TimeoutSec 10
        $completed = $TRUE
        Write-Host ("Site reachable! (" + $Uri + ")")
    } catch {
        if ($retrycount -ge $maxRetries) {
            $completed = $TRUE
            throw ("Site is not reachable, failed the maximum number of {1} times." -f $command, $retrycount)

        } else {
            Write-Host ("Site doesn't seem to be reachable... Retrying in {1} seconds." -f $command, $secondsDelay)
            Start-Sleep $SecondsDelay
            $retrycount++
        }
    }
}