PowerShell script to check the status of a URL

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Similar to this question here I am trying to monitor if a set of website links are up and running or not responding. I have found the same PowerShell script over the Internet.

However, instead of direct website links I need to check more specific links, for example:

http://mypage.global/Chemical/

http://maypage2:9080/portal/site/hotpot/

When I am trying to check on the status of these links, I get the following output:

URL    StatusCode    StatusDescription    ResponseLength    TimeTaken
http://mypage.global/Chemical/    0
http://maypage2:9080/portal/site/hotpot/    0

The above links requires me to be connected to the VPN, but I can access these links from the browser.

Output of Invoke-WebRequest -Uri https://stackoverflow.com/questions/20259251/powershell-script-to-check-the-status-of-a-url:

PS C:\Users\682126> Invoke-WebRequest -Uri https://stackoverflow.com/questions/20259251/powershell-script-to-check-the-status-of-a-url

The term 'Invoke-WebRequest' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

At line:1 char:18
+ Invoke-WebRequest <<<<  -Uri https://stackoverflow.com/questions/20259251/powershell-script-to-check-the-status-of-a-url > tmp.txt
    + CategoryInfo          : ObjectNotFound: (Invoke-WebRequest:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

$PSVersionTable

Name                           Value
----                           -----
CLRVersion                     2.0.50727.5472
BuildVersion                   6.1.7601.17514
PSVersion                      2.0
WSManStackVersion              2.0
PSCompatibleVersions           {1.0, 2.0}
SerializationVersion           1.1.0.1
PSRemotingProtocolVersion      2.1

I recently set up a script that does this.

As David Brabant pointed out, you can use the System.Net.WebRequest class to do an HTTP request.

To check whether it is operational, you should use the following example code:

# First we create the request.
$HTTP_Request = [System.Net.WebRequest]::Create('http://google.com')

# We then get a response from the site.
$HTTP_Response = $HTTP_Request.GetResponse()

# We then get the HTTP code as an integer.
$HTTP_Status = [int]$HTTP_Response.StatusCode

If ($HTTP_Status -eq 200) {
    Write-Host "Site is OK!"
}
Else {
    Write-Host "The Site may be down, please check!"
}

# Finally, we clean up the http request by closing it.
If ($HTTP_Response -eq $null) { } 
Else { $HTTP_Response.Close() }

How to check response code from a website using PowerShell , I hope you have idea of how to check the Website status using Powershell script. I would like to have feedback from my posts readers. Your valuable feedback  I am currently testing a link to a confluence page, watching the console in Chrome I can see the first status returned is a 404 - Not Found, then a dozen or so requests afterwards that are 304, 200. I am guessing the requests after the first 404 are affecting my results, I need the script to return based on that first response.

For people that have PowerShell 3 or later (i.e. Windows Server 2012+ or Windows Server 2008 R2 with the Windows Management Framework 4.0 update), you can do this one-liner instead of invoking System.Net.WebRequest:

$statusCode = wget http://stackoverflow.com/questions/20259251/ | % {$_.StatusCode}

Powershell Script for Website Availability Monitoring / URL Monitoring, This Script will take the list of URLs from a text tile( in this case from D:\URLList.txt​)as input, and results output with URL, StatusCode, Description,  Powershell script for website availability monitoring/URL Monitoring. This Script will take the list of URLs from a text tile( in this case from D:\URLList.txt)as input, and results output with URL, StatusCode, Description, Response Length and time taken fields in a HTML Report.

You can try this:

function Get-UrlStatusCode([string] $Url)
{
    try
    {
        (Invoke-WebRequest -Uri $Url -UseBasicParsing -DisableKeepAlive).StatusCode
    }
    catch [Net.WebException]
    {
        [int]$_.Exception.Response.StatusCode
    }
}

$statusCode = Get-UrlStatusCode 'httpstat.us/500'

Knowing status of a URL using PowerShell, Using following PowerShell script to check status of a URL. <URL> is the placeholder for the URL (for example 'https://www.google.com/') I have a current cron job that checks a specific URL and emails out twice an hour if up and if down, will email an SMS email address to alert. I have been tasked with moving this to powershell and am having a bit of trouble. I can provide a screencap of the current script if necessary. Any help would be appreciated.

$request = [System.Net.WebRequest]::Create('http://stackoverflow.com/questions/20259251/powershell-script-to-check-the-status-of-a-url')

$response = $request.GetResponse()

$response.StatusCode

$response.Close()

Topic: How to get the url status, How can i get the url status and perform a task as per url status like status want to ignore the below error and just want check url is up or not) Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Learn more Script to check the status of a URL

Below is the PowerShell code that I use for basic web URL testing. It includes the ability to accept invalid certs and get detailed information about the results of checking the certificate.

$CertificateValidatorClass = @'
using System;
using System.Collections.Concurrent;
using System.Net;
using System.Security.Cryptography;
using System.Text;

namespace CertificateValidation
{
    public class CertificateValidationResult
    {
        public string Subject { get; internal set; }
        public string Thumbprint { get; internal set; }
        public DateTime Expiration { get; internal set; }
        public DateTime ValidationTime { get; internal set; }
        public bool IsValid { get; internal set; }
        public bool Accepted { get; internal set; }
        public string Message { get; internal set; }

        public CertificateValidationResult()
        {
            ValidationTime = DateTime.UtcNow;
        }
    }

    public static class CertificateValidator
    {
        private static ConcurrentStack<CertificateValidationResult> certificateValidationResults = new ConcurrentStack<CertificateValidationResult>();

        public static CertificateValidationResult[] CertificateValidationResults
        {
            get
            {
                return certificateValidationResults.ToArray();
            }
        }

        public static CertificateValidationResult LastCertificateValidationResult
        {
            get
            {
                CertificateValidationResult lastCertificateValidationResult = null;
                certificateValidationResults.TryPeek(out lastCertificateValidationResult);

                return lastCertificateValidationResult;
            }
        }

        public static bool ServicePointManager_ServerCertificateValidationCallback(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certificate, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors)
        {
            StringBuilder certificateValidationMessage = new StringBuilder();
            bool allowCertificate = true;

            if (sslPolicyErrors != System.Net.Security.SslPolicyErrors.None)
            {
                if ((sslPolicyErrors & System.Net.Security.SslPolicyErrors.RemoteCertificateNameMismatch) == System.Net.Security.SslPolicyErrors.RemoteCertificateNameMismatch)
                {
                    certificateValidationMessage.AppendFormat("The remote certificate name does not match.\r\n", certificate.Subject);
                }

                if ((sslPolicyErrors & System.Net.Security.SslPolicyErrors.RemoteCertificateChainErrors) == System.Net.Security.SslPolicyErrors.RemoteCertificateChainErrors)
                {
                    certificateValidationMessage.AppendLine("The certificate chain has the following errors:");
                    foreach (System.Security.Cryptography.X509Certificates.X509ChainStatus chainStatus in chain.ChainStatus)
                    {
                        certificateValidationMessage.AppendFormat("\t{0}", chainStatus.StatusInformation);

                        if (chainStatus.Status == System.Security.Cryptography.X509Certificates.X509ChainStatusFlags.Revoked)
                        {
                            allowCertificate = false;
                        }
                    }
                }

                if ((sslPolicyErrors & System.Net.Security.SslPolicyErrors.RemoteCertificateNotAvailable) == System.Net.Security.SslPolicyErrors.RemoteCertificateNotAvailable)
                {
                    certificateValidationMessage.AppendLine("The remote certificate was not available.");
                    allowCertificate = false;
                }

                System.Console.WriteLine();
            }
            else
            {
                certificateValidationMessage.AppendLine("The remote certificate is valid.");
            }

            CertificateValidationResult certificateValidationResult = new CertificateValidationResult
                {
                    Subject = certificate.Subject,
                    Thumbprint = certificate.GetCertHashString(),
                    Expiration = DateTime.Parse(certificate.GetExpirationDateString()),
                    IsValid = (sslPolicyErrors == System.Net.Security.SslPolicyErrors.None),
                    Accepted = allowCertificate,
                    Message = certificateValidationMessage.ToString()
                };

            certificateValidationResults.Push(certificateValidationResult);
            return allowCertificate;
        }

        public static void SetDebugCertificateValidation()
        {
            ServicePointManager.ServerCertificateValidationCallback = ServicePointManager_ServerCertificateValidationCallback;
        }

        public static void SetDefaultCertificateValidation()
        {
            ServicePointManager.ServerCertificateValidationCallback = null;
        }

        public static void ClearCertificateValidationResults()
        {
            certificateValidationResults.Clear();
        }
    }
}
'@

function Set-CertificateValidationMode
{
    <#
    .SYNOPSIS
    Sets the certificate validation mode.
    .DESCRIPTION
    Set the certificate validation mode to one of three modes with the following behaviors:
        Default -- Performs the .NET default validation of certificates. Certificates are not checked for revocation and will be rejected if invalid.
        CheckRevocationList -- Cerftificate Revocation Lists are checked and certificate will be rejected if revoked or invalid.
        Debug -- Certificate Revocation Lists are checked and revocation will result in rejection. Invalid certificates will be accepted. Certificate validation
                 information is logged and can be retrieved from the certificate handler.
    .EXAMPLE
    Set-CertificateValidationMode Debug
    .PARAMETER Mode
    The mode for certificate validation.
    #>
    [CmdletBinding(SupportsShouldProcess = $false)]
    param
    (
        [Parameter()]
        [ValidateSet('Default', 'CheckRevocationList', 'Debug')]
        [string] $Mode
    )

    begin
    {
        $isValidatorClassLoaded = (([System.AppDomain]::CurrentDomain.GetAssemblies() | ?{ $_.GlobalAssemblyCache -eq $false }) | ?{ $_.DefinedTypes.FullName -contains 'CertificateValidation.CertificateValidator' }) -ne $null

        if ($isValidatorClassLoaded -eq $false)
        {
            Add-Type -TypeDefinition $CertificateValidatorClass
        }
    }

    process
    {
        switch ($Mode)
        {
            'Debug'
            {
                [System.Net.ServicePointManager]::CheckCertificateRevocationList = $true
                [CertificateValidation.CertificateValidator]::SetDebugCertificateValidation()
            }
            'CheckRevocationList'
            {
                [System.Net.ServicePointManager]::CheckCertificateRevocationList = $true
                [CertificateValidation.CertificateValidator]::SetDefaultCertificateValidation()
            }
            'Default'
            {
                [System.Net.ServicePointManager]::CheckCertificateRevocationList = $false
                [CertificateValidation.CertificateValidator]::SetDefaultCertificateValidation()
            }
        }
    }
}

function Clear-CertificateValidationResults
{
    <#
    .SYNOPSIS
    Clears the collection of certificate validation results.
    .DESCRIPTION
    Clears the collection of certificate validation results.
    .EXAMPLE
    Get-CertificateValidationResults
    #>
    [CmdletBinding(SupportsShouldProcess = $false)]
    param()

    begin
    {
        $isValidatorClassLoaded = (([System.AppDomain]::CurrentDomain.GetAssemblies() | ?{ $_.GlobalAssemblyCache -eq $false }) | ?{ $_.DefinedTypes.FullName -contains 'CertificateValidation.CertificateValidator' }) -ne $null

        if ($isValidatorClassLoaded -eq $false)
        {
            Add-Type -TypeDefinition $CertificateValidatorClass
        }
    }

    process
    {
        [CertificateValidation.CertificateValidator]::ClearCertificateValidationResults()
        Sleep -Milliseconds 20
    }
}

function Get-CertificateValidationResults
{
    <#
    .SYNOPSIS
    Gets the certificate validation results for all operations performed in the PowerShell session since the Debug cerificate validation mode was enabled.
    .DESCRIPTION
    Gets the certificate validation results for all operations performed in the PowerShell session since the Debug certificate validation mode was enabled in reverse chronological order.
    .EXAMPLE
    Get-CertificateValidationResults
    #>
    [CmdletBinding(SupportsShouldProcess = $false)]
    param()

    begin
    {
        $isValidatorClassLoaded = (([System.AppDomain]::CurrentDomain.GetAssemblies() | ?{ $_.GlobalAssemblyCache -eq $false }) | ?{ $_.DefinedTypes.FullName -contains 'CertificateValidation.CertificateValidator' }) -ne $null

        if ($isValidatorClassLoaded -eq $false)
        {
            Add-Type -TypeDefinition $CertificateValidatorClass
        }
    }

    process
    {
        return [CertificateValidation.CertificateValidator]::CertificateValidationResults
    }
}

function Test-WebUrl
{
    <#
    .SYNOPSIS
    Tests and reports information about the provided web URL.
    .DESCRIPTION
    Tests a web URL and reports the time taken to get and process the request and response, the HTTP status, and the error message if an error occurred.
    .EXAMPLE
    Test-WebUrl 'http://websitetotest.com/'
    .EXAMPLE
    'https://websitetotest.com/' | Test-WebUrl
    .PARAMETER HostName
    The Hostname to add to the back connection hostnames list.
    .PARAMETER UseDefaultCredentials
    If present the default Windows credential will be used to attempt to authenticate to the URL; otherwise, no credentials will be presented.
    #>
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [Uri] $Url,
        [Parameter()]
        [Microsoft.PowerShell.Commands.WebRequestMethod] $Method = 'Get',
        [Parameter()]
        [switch] $UseDefaultCredentials
    )

    process
    {
        [bool] $succeeded = $false
        [string] $statusCode = $null
        [string] $statusDescription = $null
        [string] $message = $null
        [int] $bytesReceived = 0
        [Timespan] $timeTaken = [Timespan]::Zero 

        $timeTaken = Measure-Command `
            {
                try
                {
                    [Microsoft.PowerShell.Commands.HtmlWebResponseObject] $response = Invoke-WebRequest -UseDefaultCredentials:$UseDefaultCredentials -Method $Method -Uri $Url
                    $succeeded = $true
                    $statusCode = $response.StatusCode.ToString('D')
                    $statusDescription = $response.StatusDescription
                    $bytesReceived = $response.RawContent.Length

                    Write-Verbose "$($Url.ToString()): $($statusCode) $($statusDescription) $($message)"
                }
                catch [System.Net.WebException]
                {
                    $message = $Error[0].Exception.Message
                    [System.Net.HttpWebResponse] $exceptionResponse = $Error[0].Exception.GetBaseException().Response

                    if ($exceptionResponse -ne $null)
                    {
                        $statusCode = $exceptionResponse.StatusCode.ToString('D')
                        $statusDescription = $exceptionResponse.StatusDescription
                        $bytesReceived = $exceptionResponse.ContentLength

                        if ($statusCode -in '401', '403', '404')
                        {
                            $succeeded = $true
                        }
                    }
                    else
                    {
                        Write-Warning "$($Url.ToString()): $($message)"
                    }
                }
            }

        return [PSCustomObject] @{ Url = $Url; Succeeded = $succeeded; BytesReceived = $bytesReceived; TimeTaken = $timeTaken.TotalMilliseconds; StatusCode = $statusCode; StatusDescription = $statusDescription; Message = $message; }
    }
}

Set-CertificateValidationMode Debug
Clear-CertificateValidationResults

Write-Host 'Testing web sites:'
'https://expired.badssl.com/', 'https://wrong.host.badssl.com/', 'https://self-signed.badssl.com/', 'https://untrusted-root.badssl.com/', 'https://revoked.badssl.com/', 'https://pinning-test.badssl.com/', 'https://sha1-intermediate.badssl.com/' | Test-WebUrl | ft -AutoSize

Write-Host 'Certificate validation results (most recent first):'
Get-CertificateValidationResults | ft -AutoSize

Testing URIs and URLs with PowerShell, Learn all about testing URIs and URLs with PowerShell in this This command will test the validity of a given URL or URI that begins PS C:\> get-content D:\​temp\uris.txt | test-uri -Detail | where { $_.status -ne 200 -OR $_. Net.WebReques m akes a request to a Uniform Resource Identifier (URI). This is an abstract class. Using Net.WebRequest class (which is under the System.Net namespace), we get a response from a web server. Unlike the Net.WebClient class, you will not be able to download the site page.

PowerShell - How to check response code from a website, PowerShell - How to check response code from a website. To be able to check for the status of a website quickly and efficiently one can use the following code. Tags: powershell, response codes, scripts, website  Embed Embed this gist in your website. Share Copy sharable link for this gist. Clone via HTTPS Clone with Git or checkout with SVN using the repository’s web address. PowerShell script to check the status of a windows service, send an alert and start it if it is stopped.

A powershell script that can be used to check if a site is up and , to check if a site is up and running, full description can be found at: http://faces.​eti.br/2011/07/28/checking-website-status-with-powershell/ - site_checker.ps1. When creating PowerShell tools and scripts, you don’t want to code yourself into a corner. Write objects to the pipeline and use existing PowerShell commands to work with the results as I did above.

How-To: PowerShell Monitoring Scripts for HTTP Status, That's where a Powershell script comes in. that the $res object has a StatusCode property — this is what we need to check the URL status. To be able to check for the status of a website quickly and efficiently one can use the following code. This code verifies whether site returns Status Code 200. In case of different code returns it's assumed the website is down. Tags: powershell, response codes, scripts, website

Comments
  • What exactly is giving you that output?
  • What happens if you do this?: Invoke-WebRequest -Uri http://mypage.global/Chemical/
  • Invoke-WebRequest is PowerShell 3 only. You will either have to upgrade to PowerShell 3 or find some other way of doing the request.
  • @Dangph upgrading is not a possibility as I donot hold admin rights... What other ways can this be achieved?
  • Thanks, that did the job. But, when the URL is up if i were to display the response time for each URL, how am I to get that value?
  • To display the response time, you could wrap the part of your code that does the web request with (Measure-Command {HTTP REQUEST CODE HERE}).TotalSeconds
  • you can also set $HTTP_Request.Method="HEAD" this will give you just header part with no body, will be bit quicker as there is NO BODY being sent
  • Just checking: What should we be closing here on the last line, $HTTP_Response or $HTTP_Request?
  • $HTTP_Request, which is of type System.Net.HttpWebRequest, has no member close()
  • Probably worth highlighting that wget is an alias for Invoke-WebRequest (as is curl and iwr), I find that it is worth learning the native names in case you need to Google something.
  • To continue Ray's comment, I may as well also point out % is alias for ForEach-Object. Character $ designates a variable. _, when following a $, is an alias for $PSItem; which is an automatic variable (man about_Automatic_Variables) that contains the current object in the pipeline object. Which brings us to the "pipe" | (man about_Pipelines) and allows the output of the previous command to be used as input for the following command. So the full translation is $variable = Invoke-WebRequest http://stackoverflow.com/questions/20259251/ | ForEach-Object {$PSItem.StatusCode}
  • And finally, . is a shortcut way to retrieve the property (man about_Properties) of an object. So the actual full translation is $variable = Invoke-WebRequest $url | ForEach-Object {$PSItem | Select-Object -Property StatusCode}