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:
-
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,因为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。
-
我也尝试过这个
# --- 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) {
$selection = read-host "$prompt`r`n(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 type`r`n(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
有太多错误
http://screencast.com/t/bgGd0s98Uc http://screencast.com/t/bgGd0s98Uc
在您的调用 Web 请求中只需使用参数-UseBasicParsing
例如在你的脚本(第2行)中你应该使用:
$rss = Invoke-WebRequest -Uri $url -UseBasicParsing
根据文档 https://learn.microsoft.com/en-us/previous-versions/powershell/module/Microsoft.PowerShell.Utility/Invoke-WebRequest?view=powershell-3.0,在未安装或配置 IE 的系统上此参数是必需的:
使用 HTML 内容的响应对象,无需文档对象模型 (DOM) 解析。当计算机上未安装 Internet Explorer 时(例如在 Windows Server 操作系统的服务器核心安装上),需要此参数。
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