Microsoft Hotfixes downloading

   # Retrieve RSS feed from Microsoft
# Output list of hotfix titles and link to information page  function GetInfoUrl { param ($text, $os)
 switch ($os){ 
  2k {$matchtext = $2kmatchtext}
  2k3 {$matchtext = $2k3matchtext}
  dotnet {$matchtext = $dotnetmatchtext}
  default {throw "Incorrect OS passed to GetInfoUrl"}
             }
             
 if ($text -match $matchtext){ # get the first 36 characters of the string
 $guid = $matches.values -as [string];
 $guid = $guid.substring(0,36);
 #create the download page url
 $dlurl = $dlurlbase + $guid + "&displaylang=en";
 }
 else {
 $guid = "Not found";
 $dlurl = "none";
 }
 $matches = "String Not Found";
 $dlurl
  } # end of GetInfoUrl function
  
$rssUrl = "http://www.microsoft.com/technet/security/bulletin/secrss.aspx"
# $rssUrl = "http://www.microsoft.com/technet/security/current.aspx"
$feed = [xml](new-object System.Net.WebClient).DownloadString($rssUrl) $results = $feed.rss.channel.item
$dlurlbase = "http://www.microsoft.com/downloads/details.aspx?familyid="
$2kfolder = "c:\temp\Powershell\Downloads\W2K\"             # folder to hold 2k hotfixes
$2k3folder = "c:\temp\Powershell\Downloads\W2K3\"            # folder to hold 2k3 hotfixes
$configout = "c:\temp\Powershell\Downloads\config.txt"  # file to hold db.txt lines
$2kmatchtext = "[A-Z0-9]{8,8}\-[A-Z0-9]{4,4}\-[A-Z0-9]{4,4}\-[A-Z0-9]{4,4}\-[A-Z0-9]{12,12}.\>Microsoft Windows 2000 Service Pack 4"
$2k3matchtext = "[A-Z0-9]{8,8}\-[A-Z0-9]{4,4}\-[A-Z0-9]{4,4}\-[A-Z0-9]{4,4}\-[A-Z0-9]{12,12}.\>Windows Server 2003 Service Pack 2"
$dotnetmatchtext = "[A-Z0-9]{8,8}\-[A-Z0-9]{4,4}\-[A-Z0-9]{4,4}\-[A-Z0-9]{4,4}\-[A-Z0-9]{12,12}.\>ASP.NET" # For each description page, pull back all the content of the download links
$results | foreach-object {$_.title; $desctext = (New-Object Net.Webclient).DownloadString($_.link); # zero some variables so we start fresh for each hotfix
$matches = "String Not Found"
$affsys = 0
$cat = "XXX" # Get the Info Page URL for 2k and 2k3 and assign them to variables using function in this script
$2kdlurl = GetInfoUrl -text $desctext -os 2k;
$2k3dlurl = GetInfoUrl -text $desctext -os 2k3;
$dotnetdurl = GetInfoUrl -text $desctext dotnet; 
# at this point, we now have the URL to the download page(s) $2kdlurl and $2k3dlurl
# we need to do more regex stuff on the download page to find the actual link to the exe
if ($2kdlurl -ne "none")
  {
"Ok, I'll will get the download link for 2k from " + $2kdlurl; $downloadtext = (New-Object Net.Webclient).DownloadString($2kdlurl);
  if ($downloadtext -match "http://download.microsoft.com/dow.*.exe")
      {
# get the actual download link by chopping the ends off the string
 $exe2k = $matches.values -as [string];
 $exe2k = $exe2k.substring(13,($exe2k.length - 19));
 "Download Link is " + $exe2k;
$exename = $exe2k -as [string];
$exename = $exename.split("/");
$pieces = $exename.count;
$exename = $exename[ $pieces - 1 ];
 "Exe name is " + $exename;
  $kbnum = $exename.split("-");
  $kbnum = $kbnum[1]
 "KBnumber is " + $kbnum
  # Lets download the file and drop it in the relevant folder
      $clnt = new-object System.Net.WebClient;
      $clnt.DownloadFile( $exe2k,$2kfolder + $exename );
      # Add a variable showing that we downloaded a patch for 2k
      $affsys += 1   # add 1 to affsys for 2k, will add 2 for 2k3 later 
      }
  else {
  Write-Host - fore RED "uh-oh, I couldn't find the download link on the page"
      }
   }
if ($dotnetdlurl -ne "none")
  {
"Ok, I'll will get the download link for DotNET from " + $dotnetdlurl; $downloadtext = (New-Object Net.Webclient).DownloadString($dotnetdlurl);
  if ($downloadtext -match "http://download.microsoft.com/dow.*.exe")
      {
# get the actual download link by chopping the ends off the string
 $exedotnet = $matches.values -as [string];
 $exedotnet = $exedotnet.substring(0,($exedotnet.length - 0));
 "Download Link is " + $exedotnet;
$exename = $exedotnet -as [string];
$exename = $exename.split("/");
$pieces = $exename.count;
$exename = $exename[ $pieces - 1 ];
 "Exe name is " + $exename;
  $kbnum = $exename.split("-");
  $kbnum = $kbnum[1]
 "KBnumber is " + $kbnum
  # Lets download the file and drop it in the relevant folder
      $clnt = new-object System.Net.WebClient;
      $clnt.DownloadFile( $exedotnet,$2kfolder + $exename );
      # Add a variable showing that we downloaded a patch for 2k
      $affsys += 1   # add 1 to affsys for 2k, will add 2 for 2k3 later 
      }
  else {
  Write-Host - fore RED "uh-oh, I couldn't find the download link on the page"
      }
   }
if ($2k3dlurl -ne "none")
  {
"Ok, I'll will get the download link for 2k3 from " + $2k3dlurl;
$downloadtext = (New-Object Net.Webclient).DownloadString($2k3dlurl);
  if ($downloadtext -match "http://download.microsoft.com/dow.*.exe")
       {
# get the actual download link by chopping the ends off the string
 $exe2k3 = $matches.values -as [string];
 $exe2k3 = $exe2k3.substring(0,($exe2k3.length - 0));
 "Download Link is " + $exe2k3;
$exename = $exe2k3 -as [string];
$exename = $exename.split("/");
$pieces = $exename.count;
$exename = $exename[ $pieces - 1 ];
 "Exe name is " + $exename;
 $kbnum = $exename.split("-");
 $kbnum = $kbnum[1]
 "KBnumber is " + $kbnum
 # Lets download the file and drop it in the relevant folder
      $clnt = new-object System.Net.WebClient;
      $clnt.DownloadFile( $exe2k3,$2k3folder + $exename );
      # Add a variable showing that we downloaded a patch for 2k3
      $affsys += 2   # add 2 to affsys for 2k3, we added 1 for 2k earlier 
      }
 else {
 Write-Host -fore RED "uh-oh, I couldn't find the download link on the page"
      }
 # One, both or no patches have been downloaded. Create line to put in db.txt
 switch ($affsys){
 0 {"Affsys = 0, no patches downloaded"}
 1 {"Affsys = 1, just 2k patch downloaded"; $affos = "2000SP4"}
 2 {"Affsys = 2, just 2k3 patch downloaded"; $affos ="2003SP2"}
 3 {"Affsys = 3, 2k and 2k3 patch downloaded"; $affos = "2000SP4,2003SP2"}
 default {Write-host -fore RED  "uh-oh!, something went wrong with the download!"; $affos = "ERROR DOWNLOADING!"}
                }
 # prompt user for categorisation of patch
 $cat = Read-Host "What is the categorisation of" $kbnum "?"
 $line = $cat + $kbnum + "-" + $affos + "`t`t-" + $_.title
 Write-host -fore GREEN $line
 # Write to the file
 add-content -value $line -path $configout
 
 
   }
 }