Import-WsusUpdate

2024.9.0

Private/DownloadFilesSequentially.ps1

                                function DownloadFilesSequentially {

    [CmdletBinding()]

    param (

        [Parameter(Mandatory)]

        [System.Collections.ArrayList]

        $FileInfoList,

        [Parameter(Mandatory)]

        [string]

        $OutputPath

    )

    $currentDownloadNumber = 0

    $totalUpdateFiles = $FileInfoList.Count

    foreach ($parsedFileInfo in $FileInfoList) {

        $currentDownloadNumber += 1

        $downloadProgress = "$currentDownloadNumber/$totalUpdateFiles"

        $fileDownloadUri = $parsedFileInfo["Uri"]

        $fileName = $parsedFileInfo["FileName"]

        $fileDownloadPath = Join-Path $OutputPath $fileName -ErrorAction Stop

        $fileDownloadPathTemp = "$fileDownloadPath.tmp"

        if (Test-Path $fileDownloadPath) {

            Write-Output "Skipping already downloaded update file $fileName ($downloadProgress)."

            continue

        }

        if (Test-Path $fileDownloadPathTemp) {

            Write-Output "Restarting download for incomplete update file $fileName ($downloadProgress)..."

            try {

                Remove-Item -Path $fileDownloadPathTemp -ErrorAction Stop

            } catch {

                Write-Error -Message "Could not remove incomplete update file ($fileDownloadPathTemp). Please remove this file manually and try again."

                return

            }

        } else {

            Write-Output "Downloading update file $fileName ($downloadProgress)..."

        }

        try {

            $transferParams = GetBitsTransferSplatBase -Source $fileDownloadUri

            Start-BitsTransfer @transferParams `

                -DisplayName "Import-WsusUpdate update file download ($downloadProgress)" `

                -Destination $fileDownloadPathTemp `

                -ErrorAction Stop

        } catch {

            Write-Warning "BITS transfer for update file $fileName failed with the following error: $_"

            Write-Verbose "Full error info:"

            Write-Verbose ($_ | Format-List -Force | Out-String)

            Write-Warning "Retrying download once more with Invoke-WebRequest as a fallback..."

            try {

                $webRequestParams = GetWebRequestSplatBase -Uri $fileDownloadUri

                $webRequestParams["OutFile"] = $fileDownloadPathTemp

                Invoke-WebRequest @webRequestParams -ErrorAction Stop

            } catch {

                Write-Warning "Fallback download also failed for update file $fileName (URI: $fileDownloadUri) with the following error: $_"

                throw

            }

        }

        Write-Verbose "Moving finished download to its proper path $fileDownloadPath."

        Move-Item -Path $fileDownloadPathTemp -Destination $fileDownloadPath -ErrorAction Stop

    }

}

# Copyright (c) 2023-2024 AJ Tek Corporation. All Rights Reserved.

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