Gets a list of Milestone downloads

Get-MilestoneDownloadsList.ps1

function Get-MilestoneDownloadsList {
    <#
    .SYNOPSIS
    Gets a list of blobs stored at https://milestonedownload.blob.core.windows.net/files
   
    .PARAMETER Prefix
    Specifies an optional blob name prefix like 'Hotfixes', or 'Hotfixes/24.1'
    
    .EXAMPLE
    $blobs = Get-MilestoneDownloadsList -Prefix 'Hotfixes/24.1'

    #>
    [CmdletBinding()]
    param (
        [Parameter()]
        [string]
        $Prefix
    )
    
    process {
        Add-Type -AssemblyName System.Web

        $query = [System.Web.HttpUtility]::ParseQueryString('')
        $query.Add('restype', 'container')
        $query.Add('comp', 'list')

        if ($PSBoundParameters.ContainsKey('Prefix')) {
            $query.Add('prefix', $Prefix)
        }
        $uriBuilder = [uribuilder]::new('https://milestonedownload.blob.core.windows.net/files')
        $uriBuilder.Query = ''
        $uriBuilder.Query = $query.ToString()

        $blobCount = 0
        do {
            $response = Invoke-RestMethod $uriBuilder.Uri
            $startPostion = $response.IndexOf('<')
            $xml = [xml]$response.substring($startPostion)
            if (![string]::IsNullOrEmpty($xml.EnumerationResults.NextMarker)) {
                # Add or update the marker query parameter with the value of NextMarker if present.
                $query['marker'] = $xml.EnumerationResults.NextMarker
                $uriBuilder.Query = $query.ToString()
            }

            $blobCount += $xml.EnumerationResults.Blobs.Blob.Count
            Write-Verbose "Discovered $blobCount blobs"
            foreach ($blob in $xml.EnumerationResults.Blobs.Blob) {
                [pscustomobject]@{
                    Name = $blob.Name
                    Url  = $blob.Url
                    Length = $blob.Properties.'Content-Length'
                    LastModified = $blob.Properties.'Last-Modified' | Get-Date
                    ContentType = $blob.Properties.'Content-Type'
                }
            }
        } while (![string]::IsNullOrEmpty($xml.EnumerationResults.NextMarker))
    }
}