网址重定向时如何使用Powershell从Web下载文件

Question

I have seen downloading a file with the webclient for powershell. Problem is that the request url redirects multiple times before the actual file is presented. it's an ssrs web interface with a query string meathod Download=bla.csv

any idea how to accomplish this?

Answer 1

I had a similar scenario where my URL is redirected and then we need to download the file. What I did was get the redirected URL and parse for the http address and again invoked with the redirected URL. Below code worked for me.

$username = "u"
$password = "p"
$auth=$username+":"+$password
$Encoded = [System.Text.Encoding]::UTF8.GetBytes($auth)
$EncodedPassword = [System.Convert]::ToBase64String($Encoded)
$latestArtifactURL = Invoke-WebRequest $url -Headers @{Authorization = "Basic $EncodedPassword"} -MaximumRedirection 0 -ErrorAction SilentlyContinue
$URLIndex = "$latestArtifactURL".IndexOf('http:')
$redirectedURL = "$latestArtifactURL".SubString("$URLIndex") 
Invoke-WebRequest $redirectedURL -Headers @{Authorization = "Basic $EncodedPassword"} -Outfile "App.zip"

You can also use the webclient to download the file. Hope this helps.

Answer 2

我认为您可以在poshcode.org上使用此脚本 ，或尝试使用System.Net.CookieContainer进行提示，以避免陷入重定向循环。