Import-WsusUpdate

2026.7.0

Private/GetMUCatalogUpdateInfo.ps1

                                function GetMUCatalogUpdateInfo {

    [CmdletBinding()]

    param (

        [Parameter(Mandatory)]

        [string]

        $Uri

    )

    $updateInfo = @{

        "UpdateID" = ""

        "Files" = New-Object -TypeName "System.Collections.ArrayList"

    }

    # https://www.catalog.update.microsoft.com/ScopedViewInline.aspx?updateid={{UPDATE_GUID}}

    if ($Uri -match "updateid=([a-zA-Z\d]{8}-([a-zA-Z\d]{4}-){3}[a-zA-Z\d]{12})") {

        Write-Verbose "Found update ID in URI ($( $Matches[1] ))."

    } else {

        $webRequestParams = GetWebRequestSplatBase -Uri $Uri

        $updateInfoResponse = Invoke-WebRequest @webRequestParams -ErrorAction Stop

        if ($updateInfoResponse.Content -notmatch '"ScopedViewHandler_UpdateID">([a-zA-Z\d]{8}-([a-zA-Z\d]{4}-){3}[a-zA-Z\d]{12})</') {

            Write-Error -Message "Could not parse update ID from response." `

                -Category "ObjectNotFound" `

                -ErrorId "CouldNotParseUpdateID"

            return

        }

    }

    $updateInfo["UpdateId"] = $Matches[1]

    $updateFilesRequestParams = @{

        "updateIDs" = "[{`"size`":0,`"languages`":`"`",`"uidInfo`":`"$( $updateInfo["UpdateId"] )`",`"updateID`":`"$( $updateInfo["UpdateId"] )`"}]"

    }

    $webRequestParams = GetWebRequestSplatBase -Uri "https://www.catalog.update.microsoft.com/DownloadDialog.aspx"

    $webRequestParams["Method"] = "Post"

    $webRequestParams["Body"] = $updateFilesRequestParams

    $updateFilesResponse = Invoke-WebRequest @webRequestParams -ErrorAction Stop

    if ($updateFilesResponse.Content -notmatch "downloadInformation = ([\s\S]+?)minFilePath") {

        Write-Error -Message "Could not parse download information from response." `

            -Category "ObjectNotFound" `

            -ErrorId "CouldNotParseDownloadInformation"

        return

    }

    $fileInfoMatches = [regex]::Matches(

        $Matches[1],

        "files\[\d\] = new Obj[\s\S]+?url = '(.*?)';[\s\S]+?fileName = '(.*?)';[\s\S]+?defaultFile",

        [System.Text.RegularExpressions.RegexOptions]"IgnoreCase,Multiline",

        [timespan]::FromSeconds(60)

    )

    if ($fileInfoMatches.Count -eq 0) {

        Write-Error -Message "Could not parse file list from response." `

            -Category ObjectNotFound `

            -ErrorId "CouldNotParseFileList"

        return

    }

    foreach ($fileInfoMatch in $fileInfoMatches) {

        [void]($updateInfo["Files"].Add(@{

            "Uri" = $fileInfoMatch.Groups[1].Value

            "FileName" = $fileInfoMatch.Groups[2].Value

        }))

    }

    return $updateInfo

}

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