Use powshell to download a file

grab-url.ps1

 function grab-url {
  param(
    [string[]]$filelist,
    $headers,
    [switch]$force
  )
  $curdir = (get-location).path
  $wc = New-Object System.Net.WebClient
  if ($headers) {
    foreach ($key in $headers.keys) {
    echo $key,$headers[$key]
      $wc.Headers.Add($key,$headers[$key])
    }
  }
  $filelist | %{
    $uri = [system.uri]$_
    $file = "{0}\{1}" -f $curdir,$uri.Segments[-1]
    if ((!(Test-Path $file)) -or $force){
      "Downloading $file"
      $url = '{0}://{1}{2}' -f $uri.Scheme,$uri.Host,($uri.AbsolutePath -replace ":","%3A")
      $wc.DownloadFile($url,$file)
    } else {
      "Skipping $file"
    }
  }   
}