#ANSI&cls&powershell -Version 5.1 -NoLogo -NoProfile -Command "gc -Encoding Oem -ReadCount 0 -LiteralPath '%~f0'|out-string|iex"&pause&exit/b
$l = [Net.HttpListener]::new()
$l.Prefixes.Add("http://127.0.0.1:8080/")
$l.Start()
while ($l.IsListening) {
    $c = $l.GetContext()
    $r = $c.Response
    $r.ContentType = "image/svg+xml"
    $b = [Text.Encoding]::UTF8.GetBytes((@'
<?xml version="1.0" encoding="UTF-8"?>
<svg width="300" height="100" xmlns="http://www.w3.org/2000/svg">
<polyline points="{0}" fill="none" stroke="#2563eb" stroke-width="2"/>
</svg>
'@ -f $c.Request.QueryString["d"]))
    $r.OutputStream.Write($b, 0, $b.Length)
    $r.Close()
}