我需要使用 powershell 下载频道 9 系列，但是我尝试过的脚本有错误：

1. 这个脚本

   $url="https://channel9.msdn.com/blogs/OfficeDevPnP/feed/mp4high"
   

   $rss=invoke-webrequest -uri $url
   $destination=”D:\Videos\OfficePnP”
   [xml]$rss.Content|foreach{
   $.SelectNodes(“rss/channel/item/enclosure”)
   }|foreach{
   “Checking $($.url.split(“/”)[-1]), we will skip it if it already exists in $($destination)”
   if(!(test-path ($destination + $.url.split(“/”)[-1]))){
   “Downloading: ” + $.url
   start-bitstransfer $_.url $destination
   }
   }

失败并出现错误：

无法解析响应内容，原因是 Internet Explorer 引擎不可用，或者 Internet Explorer 的首次启动配置不完整。指定
UseBasicParsing 参数并重试。

1. 我也试过这个

   # --- settings ---
   

   $feedUrl = "https://channel9.msdn.com/blogs/OfficeDevPnP/feed/mp4high”
   $mediaType = “mp4high”
   $overwrite = $false
   $destinationDirectory = join-path ([Environment]::GetFolderPath(“MyDocuments”)) “OfficeDevPnP”

   — locals —

   $webClient = New-Object System.Net.WebClient

   — functions —

   function PromptForInput ($prompt, $default) {
   $selection = read-host “$promptrn(default: $default)”
   if ($selection) {$selection} else {$default}
   }

   function DownloadEntries {
   param ([string]$feedUrl)
   $feed = [xml]$webClient.DownloadString($feedUrl)

   $progress = 0
   $pagepercent = 0
   $entries = $feed.rss.channel.item.Length
   $invalidChars = [System.IO.Path]::GetInvalidFileNameChars()
   $feed.rss.channel.item | foreach {
   $url = New-Object System.Uri($.enclosure.url)
   $name = $.title
   $extension = [System.IO.Path]::GetExtension($url.Segments[-1])
   $fileName = $name + $extension

   $invalidchars | foreach { $filename = $filename.Replace($_, ' ') }
   $saveFileName = join-path $destinationDirectory $fileName
   $tempFilename = $saveFilename + ".tmp"
   $filename
   if ((-not $overwrite) -and (Test-Path -path $saveFileName)) 
   {
       write-progress -activity "$fileName already downloaded" -status "$pagepercent% ($progress / $entries) complete" -percentcomplete $pagepercent
   }
   else 
   {
       write-progress -activity "Downloading $fileName" -status "$pagepercent% ($progress / $entries) complete" -percentcomplete $pagepercent
      $webClient.DownloadFile($url, $tempFilename)
      rename-item $tempFilename $saveFileName
   }
   $pagepercent = [Math]::floor((++$progress)/$entries*100)
   

   }
   }

   — do the actual work —

   [string]$feedUrl = PromptForInput “Enter feed URL” $feedUrl
   [string]$mediaType = PromptForInput “Enter media typern(options:Wmv,WmvHigh,mp4,mp4high,zune,mp3)” $mediaType
   $feedUrl += $mediaType

   [string]$destinationDirectory = PromptForInput “Enter destination directory” $destinationDirectory

   if dest dir doesn’t exist, create it

   if (!(Test-Path -path $destinationDirectory)) { New-Item $destinationDirectory -type directory }

   DownloadEntries $feedUrl

错误太多

http://screencast.com/t/bgGd0s98Uc