PowerShell Function: Returns all download links for a given patch provided by GUID

Get-PatchDownloadURLs.ps1

function Get-PatchDownloadURLs {
    
    <#
    .SYNOPSIS
        Returns all download links for a given patch
    .DESCRIPTION
        A PATCH is not just a KB article ID, at least not in this sense. A patch
        is a GUID that represents a KB applied to a **specific** computer. 
    .NOTES
        Why am I doing it like this? 
        Because when you parse the Microsoft Update catlog for a given KB article
        your going to find tons of results for tons of different products. Microsoft
        also doesn't make it easy to select a different product because not only are all
        products NOT listed in the 'products' column, but the product names don't match the 
        real product names. The way around this is to use a function like: Get-KBArticle ( different repo )
        to return all GUIDs for a given KB, then filter down to the products you want, 
        then search for the download links for the GUIDS representing those patches
    #>

    [CmdletBinding()]
    param (

        # GUID - this is the unique identify for this patch
        # If you search the Microsoft update catalog and click on a particular results
        # the guid will appear in the address bar for the corresponding update 
        # that pops up
        [Parameter(Mandatory)]
        [string]
        $GUID
        
    )
    
    begin {

        # Stop on all errors
        $ErrorActionPreference = "Stop"

        Write-Verbose (
            "Searching for download links for patch with guid: {0}" -f
            $GUID
        )

    }
    
    process {

        # Array to store all links
        $DownloadUrls = @()            
        
        # This code modified and based on http://stealthpuppy.com/powershell-download-import-updates-mdt/
        # Only way to find download links is to launch the download page
        # for a given KB article
        # To do that, we need to build a form and submit it as this page is done via js on the website
        # I have NOT idea how stealthpuppy found out about this hidden backend form!
        $ProgressPreference = "SilentlyContinue" # Speeds up invoke webrequest
        
        # Build body
        $Post = @{ 
            size     = 0; 
            updateID = $GUID; 
            uidInfo  = $GUID 
        } | ConvertTo-Json -Compress

        $PostBody = @{ 
            updateIDs = "[$Post]" 
        } 

        $Response = Invoke-WebRequest `
            -Uri 'http://www.catalog.update.microsoft.com/DownloadDialog.aspx' `
            -UseBasicParsing `
            -Method POST `
            -Body $PostBody
        
        # Parse out download links
        $DownloadUrls += $Response  |
            Select-Object -ExpandProperty Content |
            Select-String -AllMatches -Pattern "(http[s]?\://download\.windowsupdate\.com\/[^\'\""]*)" | 
            ForEach-Object { $_.Matches.Value }


        $ProgressPreference = "Continue"

        return $DownloadUrls

    }
}