Dump SSL certificate to a temp file from URI

Write-CertificateToTempFile.ps1

function Write-CertificateToTempFile($uri) {
    $http = [Net.WebRequest]::Create($uri)
    try {
        $resp = $http.GetResponse()
        $cert = $http.ServicePoint.Certificate
        $byte = $cert.Export([Security.Cryptography.X509Certificates.X509ContentType]::Cert)
    } 
    catch {
        Write-Warning "Errors encoutered during connection attempt:`n$_"
        Write-Warning "Cannot continue. Quitting."
    }

    $file = [io.path]::GetTempFileName() 
    Set-Content -Value $byte -Encoding Byte -Path $file
    return $file
}