Powershell script / parse website and return found value

Hello Thwack-Folks!

Orion provides out of the box HTTP parsing.

Which simply means: I am looking for a word (let's say "solar"), define the URL and the monitor will return me TRUE or FALSE wether it is found or not.

What I am looking for is a way to output the content of a website which only shows me a number like 12345

I tried a basic and simply powershell script

$webClient = new-object System.Net.WebClient

$webClient.Headers.Add("user-agent", "PowerShell Script")

$output = $webClient.DownloadString("https:/example.com/?id=myId")

Write-Host "Statistic: $($output)"

But the only return I get is NaN.

So my question is, what does NaN exactly mean and how do you return a value from a website usually?

Cheers

-FRA

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Accepted answers

FormerMember

Hello Lukas!

Thank you for your answer!

I had also to overcome basic authentication, so here is the working part (whoever else need an example)

$Url = "http://yourdomain.org"

$webclient = new-object system.net.webclient

$webclient.credentials = new-object system.net.networkcredential("yourusername", "yourpassword")

$result = $webclient.DownloadString($Url)

Write-Host "Statistic: $result"

Cheers

-FRA

All comments

lukas.belza

Hello,

The NaN means "Not a Number", so there is an error during converting output to number.

Firstly I recommend to modify the last command:

$webClient = new-object System.Net.WebClient

$webClient.Headers.Add("user-agent", "PowerShell Script")

$output = $webClient.DownloadString("http://localhost/")

Write-Host "Statistic: $output"

The System.Net.WebClient.DownloadString method returns source code of the web page including HTML tags. But the output should be only the number (e.g. "Statistic: 12345"). So I would recommend to try the script in the PowerShell to make sure it returns output in correct format. Then this script should work also in SAM.

Lukas Belza (SolarWinds development)

FormerMember

Hello Lukas!

Thank you for your answer!

I had also to overcome basic authentication, so here is the working part (whoever else need an example)

$Url = "http://yourdomain.org"

$webclient = new-object system.net.webclient

$webclient.credentials = new-object system.net.networkcredential("yourusername", "yourpassword")

$result = $webclient.DownloadString($Url)

Write-Host "Statistic: $result"

Cheers

-FRA