PowerShell v3 Invoke-WebRequest: Troubles with forms

Question

Since I upgraded to Windows 8 a lot of my PowerShell scripts relying on launching an invisible IE won’t quite work anymore, so I tried switching to the Invoke-WebRequest

Answer 1

The example in the question works, but you have to use rb and not $rb in the first line:

$response = Invoke-WebRequest -Uri $myUrl -Method Default -SessionVariable rb

I also had to use ($myUrl + '/login') since this is my login address.

$response = Invoke-WebRequest -Uri ($myUrl + '/login') -Method Default -SessionVariable rb

And in the last line used ($myUrl + $form.Action):

$response = Invoke-WebRequest -Uri ($myUrl + $form.Action) -WebSession $rb -Method POST