DashHtml

2.6.0

Private/ConvertTo-DhGzipBase64.ps1

                                function ConvertTo-DhGzipBase64 {

    <#

    .SYNOPSIS

        v2.6.0 - gzip a UTF-8 string and return it as base64 (Export-DhDashboard -CompressData).

        The browser reverses it with atob + DecompressionStream('gzip').

    #>

    param([Parameter(Mandatory)] [AllowEmptyString()] [string] $Text)

    $bytes = [Text.Encoding]::UTF8.GetBytes($Text)

    $ms = [IO.MemoryStream]::new()

    $gz = [IO.Compression.GZipStream]::new($ms, [IO.Compression.CompressionLevel]::Optimal)

    try { $gz.Write($bytes, 0, $bytes.Length) } finally { $gz.Dispose() }

    [Convert]::ToBase64String($ms.ToArray())

}