[toenuff]

Here's the PowerShell way of doing it - Ported from Adam's post:

Code:

$url = "http://localhost:8080/jsonrpc"

$command = '{"jsonrpc": "2.0", "method": "JSONRPC.Version", "id": 1}'

$bytes = [System.Text.Encoding]::ASCII.GetBytes($command)
$web = [System.Net.WebRequest]::Create($url)
$web.Method = "POST"
$web.ContentLength = $bytes.Length
$web.ContentType = "application/x-www-form-urlencoded"
$stream = $web.GetRequestStream()
$stream.Write($bytes,0,$bytes.Length)
$stream.close()

$reader = New-Object System.IO.Streamreader -ArgumentList $web.GetResponse().GetResponseStream()
$reader.ReadToEnd()
$reader.Close()