Author Posts

October 4, 2013 at 11:59 am


I've been playing with Invoke-WebRequest, to write a very simple 'soak test' for some of our web services. I've noticed some very strange behavior when I'm running this, see screen shot attached.

Any ideas why Powershell is throwing a popup notification?

Import-Module WebAdministration
$cred = Get-Credential
ri output.csv -Force
1..1000000 | %{
	Invoke-WebRequest -Uri "https://myhost:1443/Service/rest/Get?ProductTypeFilter=abc&Key=7007009&BlobTypeFilter=Sales&MaxNumOfBlobs=10" -Credential $cred | select -ExpandProperty content | %{Write-Output "myhost:1443 `t $_"} | Out-File output.csv -Append 




October 5, 2013 at 3:11 am

Hi – the screen shot isn't clear – its not fully visible – but it seems to be some kind of progress bar. Can you supply a clearer screen shot?

How much data are you expecting to be returned?
Do you get the same issue with all calls to the service?

October 7, 2013 at 11:46 am

This only seems to occur when I'm running requests in a quick fashion. In this example it's probably doing about 7-9/second, and the popup doesn't stay long enough to get a good screen shot. The amount of data returning is very small less than 50kb..But regardless, even if the data was 1GB, there shouldn't be a popup status window should there?

As a side note, if I run this while RDP'd into the server hosting the web service i get this second image "perf2.jpg" which I would expect ( I guess ).

Maybe this is a Windows 7 thing?

October 7, 2013 at 2:40 pm

That "pop up" is a PowerShell progress bar, and its an inbuilt part of the Web-Request command. You can probably set $ProgressPreference='SilentlyContinue' to suppress that.

The pop-up is rendered by the host application. So, when you're in the console host, it's a character-based pseudo-pop-up-thing. I suspect the first time you were using the ISE or some other "graphical" host, which renders the progress as an actual dialog.