functions/Get-WhoIs.ps1
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Function Get-WhoIs { [cmdletbinding()] [OutputType("WhoIsResult")] Param ( [parameter(Position = 0, Mandatory, HelpMessage = "Enter an IPV4 address to lookup with WhoIs", ValueFromPipeline, ValueFromPipelineByPropertyName)] [ValidateNotNullOrEmpty()] [ValidatePattern("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$")] [ValidateScript( { #verify each octet is valid to simplify the regex $test = ($_.split(".")).where({[int]$_ -gt 255}) if ($test) { Throw "$_ does not appear to be a valid IPv4 address." $false } else { $true } })] [string]$IPAddress ) Begin { Write-Verbose "Starting $($MyInvocation.MyCommand)" $baseURL = 'http://whois.arin.net/rest' #default is XML anyway $header = @{"Accept" = "application/xml"} } #begin Process { Write-Verbose "Getting WhoIs information for $IPAddress" $url = "$baseUrl/ip/$ipaddress" Try { $r = Invoke-Restmethod $url -Headers $header -ErrorAction stop Write-verbose ($r.net | Out-String) } Catch { $errMsg = "Sorry. There was an error retrieving WhoIs information for $IPAddress. $($_.exception.message)" $host.ui.WriteErrorLine($errMsg) } if ($r.net) { Write-Verbose "Creating result" [PSCustomObject]@{ PSTypeName = "WhoIsResult" IP = $ipaddress Name = $r.net.name RegisteredOrganization = $r.net.orgRef.name City = (Invoke-RestMethod $r.net.orgRef.'#text').org.city StartAddress = $r.net.startAddress EndAddress = $r.net.endAddress NetBlocks = $r.net.netBlocks.netBlock | foreach-object {"$($_.startaddress)/$($_.cidrLength)"} Updated = $r.net.updateDate -as [datetime] } } #If $r.net } #Process End { Write-Verbose "Ending $($MyInvocation.MyCommand)" } #end } |