check website url status using powershell version 2.0 - powershell-2.0

Question

I need to check if URL is working properly or not using "PowerShell Version 2.0"
I found this script over internet, but it is not wokring fine for wrong URL's. It should go in else loop for wrong URL's as well as print website code. And I am not able to pass credentials in this script.
e.g. for www.google.com(correct URL) status code should be 200but
for www.gfjgugy79rt9(Wrong URL) status code should be something like 404
script I found over internet for powershell version 2.0:
# 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.
$HTTP_Response.Close()

Answer 1

In PowerShell higher than 2.0 you should use try ... catch ... finally because this code fire exception when the URI is no conform or when the adress part is not solvable by the DNS :
try {
# 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!"
}
}
catch {
Write-Verbose $_.ScriptStackTrace
Write-Verbose "Ligne $($_.InvocationInfo.ScriptLineNumber) : $($_.exception.message)"
}
finally {
# Finally, we clean up the http request by closing it.
$HTTP_Response.Close()
}
In PowShell 2.0 you just have to put a Trap code at the beginnig of the scope (function, script) where you want to catch these exception :
trap
{
Write-Verbose $_.ScriptStackTrace
Write-Verbose "Ligne $($_.InvocationInfo.ScriptLineNumber) : $($_.exception.message)"
Write-Verbose ([datetime]::Now)
return
}