PowerShell script to check the status of a URL

Question

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 gt  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  lt  lt  lt  lt   -Uri https   stackoverflow com questions 20259251 powershell-script-to-check-the-status-of-a-url  gt  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

User · Answer

You must update the Windows PowerShell to minimum of version 4 0 for the script below to work       array  SiteLinks    http   mypage global Chemical test html   http   maypage2 9080 portal site hotpot test json    foreach  url in  SiteLinks        try         Write-host  Verifying  url  -ForegroundColor Yellow        checkConnection   Invoke-WebRequest -Uri  url       if   checkConnection StatusCode -eq 200             Write-Host  Connection Verified   -ForegroundColor Green                   catch  System Net WebException           exceptionMessage    Error 0  Exception       if   exceptionMessage -match  503              Write-Host  Server Unavaiable  -ForegroundColor Red               elseif   exceptionMessage -match  404              Write-Host  Page Not found  -ForegroundColor Red

User · Answer

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 lt CertificateValidationResult gt  certificateValidationResults   new ConcurrentStack lt CertificateValidationResult gt              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  amp  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  amp  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  amp  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        lt        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        gt       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        lt        SYNOPSIS     Clears the collection of certificate validation results       DESCRIPTION     Clears the collection of certificate validation results       EXAMPLE     Get-CertificateValidationResults       gt       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        lt        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       gt       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        lt        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        gt       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

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

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] PowerShell script to check the status of a URL

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