Invoke-WebRequest -Login

PowerShell Help
1

I am trying to loginto a web application called Thruk… it is using the OMD version.

I am using invoke-webrequest to use a websession to try and connect to a local thruk omd instance. I am trying to correlate the forms the best i can from the examples but when I try and submit the web session the output just keeps going back to the login page.

This is the following code I run:

add-type @"
using System.Net;
using System.Security.Cryptography.X509Certificates;
public class TrustAllCertsPolicy : ICertificatePolicy {
    public bool CheckValidationResult(
        ServicePoint srvPoint, X509Certificate certificate,
        WebRequest request, int certificateProblem) {
            return true;
        }
 }
"@
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy


$login = Invoke-WebRequest "https://icinga/bcmonitoring/thruk/cgi-bin/login.cgi?bcmonitoring/thruk/" -SessionVariable fb
$login.Forms[0].Fields.loginuser = $cred.UserName
$login.Forms[0].Fields.password = $cred.GetNetworkCredential().Password
$UAstring = "Firefox"
$mainPage = Invoke-WebRequest ("https://icinga/bcmonitoring/thruk/cgi-bin/login.cgi?bcmonitoring/thruk/") -WebSession $fb -Body $login -Method Post -UserAgent $UAstring

This is the output:

The above is just an excerpt. Any help will be most appreciated…

2

Here’s what I came up with using the Thrunk Demo page.

#Initialize Session
$R=Invoke-WebRequest https://demo.thruk.org/thruk/cgi-bin/login.cgi -SessionVariable thrunksession

#Set Login and Password
$R.Forms[0].Fields["login"]="test"
$R.Forms[0].Fields["password"]="test"

#Authenticate
$R=Invoke-WebRequest -Uri ("https://demo.thruk.org/thruk/cgi-bin/" + $R.Forms[0].Action) -WebSession $thrunksession -Method POST -Body $R.Forms[0].Fields
$R.ParsedHtml.body.innerHTML

#Logout
$R=Invoke-WebRequest -Uri ("https://demo.thruk.org/thruk/cgi-bin/login.cgi?logout") -WebSession $thrunksession -Method POST
$R.ParsedHtml.body.innerText
3

Thanks @Curtis!

I compared and contrasted your code and saw that the difference that you had was

$R.Forms[0].Fields[“login”]=“test”

where I put it as loginuser

Thats because that is what i see in the output:


Id Method Action    Fields                                                     
-- ------ ------    ------                                                     
   post   login.cgi {[referer, ], [loginuser, ], [password, ], [submit, Login]}

I am curious why is that powershell understood login instead of login user. Is this how it is designed?

4

loginuser is the ID of the field, but the name of the filed is login.

5

Oh, so i am assuming you were looking at the inputfields property?

innerHTML : 
innerText : 
outerHTML : 
outerText : 
tagName   : INPUT
id        : loginuser
class     : logininput
name      : login
6

I actually used the developer tools of IE and/or Chrome to look at the form html on the page.