我一直在研究使用 .txt 文件从 tinyurls 下载多个文件的 powershell 脚本。Jobs感谢这个论坛上的人，我已经成功地使用它来同时实现这一点。该项目需要下载一些相当大的文件，并且使用当前方法没有进度指示器。我想一些用户可能会认为程序死了。寻找一种方法给出它在下载中的位置。这是我想出的，但我不知道如何将这些信息传回控制台。有什么建议么？
#Checks to see if NT-Download folder is on the Desktop, if not found, creates it
$DOCDIR = [Environment]::GetFolderPath("Desktop")
$TARGETDIR = "$DOCDIR\NT-Download"
if(!(Test-Path -Path $TARGETDIR )){
New-Item -ItemType directory -Path $TARGETDIR
}
$filepaths = Resolve-Path "files.txt"
Get-Content "$filepaths" | Foreach {
Start-Job {
function Save-TinyUrlFile
{
PARAM (
$TinyUrl,
$DestinationFolder
)
$response = Invoke-WebRequest -Uri $TinyUrl
$filename = [System.IO.Path]::GetFileName($response.BaseResponse.ResponseUri.OriginalString)
$filepath = [System.IO.Path]::Combine($DestinationFolder, $filename)
$totalLength = [System.Math]::Floor($response.get_ContentLength()/1024)
$responseStream = $response.GetResponseStream()
$buffer = new-object byte[] 10KB
$count = $responseStream.Read($buffer,0,$buffer.length)
$downloadedBytes = $count
try
{
$filestream = [System.IO.File]::Create($filepath)
$response.RawContentStream.WriteTo($filestream)
$filestream.Close()
while ($count -gt 0)
{
[System.Console]::CursorLeft = 0
[System.Console]::Write("Downloaded {0}K of {1}K", [System.Math]::Floor($downloadedBytes/1024), $totalLength)
$targetStream.Write($buffer, 0, $count)
$count = $responseStream.Read($buffer,0,$buffer.length)
$downloadedBytes = $downloadedBytes + $count
}
"`nFinished Download"
$targetStream.Flush()
$targetStream.Close()
$targetStream.Dispose()
$responseStream.Dispose()
}
finally
{
if ($filestream)
{
$filestream.Dispose();
}
}
}
Save-TinyUrlFile -TinyUrl $args[0] -DestinationFolder $args[1]
} -ArgumentList $_, "$TARGETDIR"
}