Get JavaScript result in Powershell

Question

I have a CSHTML file which has a block <script type="text/javascript"></script> inside.

It will show usernames:

for (var i = 0; i < result2.Users.length; i++) {
    var item = "<li style='width:100%;'>" + result2.Users[i].TchatEngineId.toString() + " | " + result2.Users[i].Pseudo + "</li>";

Now I want to get this result in Powershell, anyone knows how to do it?

I tried with Invoke-RestMethod and Invoke-WebRequest, but it always returns the source code HTML and not the result.

Loïc MICHEL · Accepted Answer · 2015-06-22 08:34:12Z

2

you could try to automate with the internet explorer COM object.

function wait4IE($ie=$global:ie){
    while ($ie.busy -or $ie.readystate -lt 4){start-sleep -milliseconds 200}
}


$global:ie=new-object -com "internetexplorer.application"
$ie.visible=$true
$ie.navigate("http://domain.com/file.html")
wait4IE

$names=$ie.Document.getElementsByTagName("li")
$names|%{$_.innerText}

edited Jun 22, 2015 at 8:34

answered Jun 22, 2015 at 8:23

Loïc MICHEL

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4 Comments

hawarden_ Over a year ago

Thanks. I tried this and it actually works. But I need to put this script to my server for monitoring and it'll run every second, I don't want to use ie because it takes too much resource.

Loïc MICHEL Over a year ago

don't make ie visible and don't forget to quit ie $ie.quit() at the end of the script, this shall not consume so much ressource.... every seconds seems a bit too much (time taken to start ie, open url and parse page....)

hawarden_ Over a year ago

I'm figuring how to do this directly by JavaScript, if there exists some way to get my JS variables in Shell.

tarekahf Over a year ago

Does this mean if I want to automate the web application, which depends on JavaScript extensively, using PowerShell, then the only option (other than IE COM Object) is to use PowerShell+Selineum+Chrome WebDrive? I tried using Invoke-WebRequest but the response has JavaScript which is needed to continue loading the website. Any feedback on this please?

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