SharePoint Web Page/Valid Site Monitoring with Email Alerts PowerShell Script

Two scripts in two days? Am I out of my mind?! Yes, no, yes, maybe… Yesterday’s SharePoint Diagnostic Log Monitor + Email Alert PowerShell Script worked so well that I was getting bombarded with too many emails! Yes, they were all critical as far as SharePoint was concerned and I was able to resolve a great majority of them. But some of them just seemed to be inherent to SharePoint and didn’t really affect the end-user experience therefore the criticality of these alerts became less of a priority.

So today I went about bootlegging a different type of monitoring system that would be more indicative of an end user’s experience with the site. With this script, I wanted to connect to the SharePoint sites and see if I get a valid response or valid content back from the server. If I can’t download the page with the System.Net.WebClient.DownloadString() method, then it’ll throw an exception and that’s how I’ll know whether the site is accessible by an end-user or not. If it’s not accessible, then an email will be generated and sent to me. Pretty cool eh?

This is extra useful when used in an environment with load balanced front ends and you want to know exactly which server is having issues. If you want to use this script in this manner, then make sure you create the scheduled tasks for each server.

Sample Email Output:

URL: https://url1
Server: ALW01

Exception: System.Net.WebException: The remote server returned an error: (500) Internal Server Error. at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request) at System.Net.WebClient.DownloadString(Uri address) at DownloadString(Object , Object[] ) at System.Management.Automation.DotNetAdapter.AuxiliaryMethodInvoke(Object target, Object[] arguments, MethodInformation methodInformation, Object[] originalArguments)

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URL: https://url2
Server: ALW02

Exception: System.Net.WebException: The remote server returned an error: (500) Internal Server Error. at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request) at System.Net.WebClient.DownloadString(Uri address) at DownloadString(Object , Object[] ) at System.Management.Automation.DotNetAdapter.AuxiliaryMethodInvoke(Object target, Object[] arguments, MethodInformation methodInformation, Object[] originalArguments)

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You may need to highlight and copy the script below into notepad to be able to read all of the characters that were chopped off by this blog’s layout.

############# Start Variables ################
$urls = @("https://url1", "https://url2")
$emailFrom = "SharePoint.Automation@email.com"
$emailTo = @("email1","email2")
$subject = "SharePoint Down!"
$smtpserver = "SMTPServer"
$server = "ALW01"
# When used in a load-balanced environment where
# each server has host entries to itself, this can help you
# identify which server is having issues.
############# End Variables ##################

[System.Reflection.Assembly]::LoadWithPartialName("System.Net")
$wc = New-Object System.Net.WebClient 
$wc.UseDefaultCredentials = $true
$body = ""

foreach($url in $urls)
{  
    try  
    {   
        $page = $wc.DownloadString($url);   
        if($page.Contains("An unexpected error has occurred.") -or $page.Contains("Cannot connect to the configuration database"))   
        {    
            $body += "<b>URL:</b> " + $url + "<br><br>"    
            $body += "<b>Server:</b> " + $server + "<br><br>"    
            $body += "<b>Exception:</b> " + "Getting a nasty error. Please help me." + "<br><br>"    
            $body += "===================================<br><br>"    
        }  
    }  

    catch [Exception]  
    {   
        $body += "<b>URL:</b> " + $url + "<br><br>"   
        $body += "<b>Server:</b> " + $server + "<br><br>"   
        $body += "<b>Exception:</b> " + $_.Exception + "<br><br>"   
        $body += "===================================<br><br>"   
    }
}

if($body -ne "")
{  
    Send-MailMessage -To $emailTo -Subject $subject -Body $body -SmtpServer $smtpserver -From $emailFrom -BodyAsHtml
}