Retrieve the IP Ranges and Service Tags

function Get-AzureIPRangesAndServiceTags {
    <#
    .SYNOPSIS
    Retrieve the Ip address ranges and Service Tags ranges for Azure (Public, USgov, Germnay or China)
    The function return a Json. This can be passed to '|Converfrom-json' if you wish
    to get a PowerShell object.
    This information is pulled from Microsoft Download pages.
    'Public' = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=56519'
    'USGov' = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=57063'
    'China' = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=57062'
    'Germany' = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=57064'
    .DESCRIPTION
    This file contains the IP address ranges for Public Azure as a whole, each
    Azure region within Public, and ranges for several Azure Services (Service Tags)
    such as Storage, SQL and AzureTrafficManager in Public. This file currently
    includes only IPv4 address ranges but a schema extension in the near future
    will enable us to support IPv6 address ranges as well. Service Tags are each
    expressed as one set of cloud-wide ranges and broken out by region within that
    cloud.  This file is updated weekly. New ranges appearing in the file will not
    be used in Azure for at least one week. Please download the new json file every
    week and perform the necessary changes at your site to correctly identify
    services running in Azure. These service tags can also be used to simplify
    the Network Security Group rules for your Azure deployments though some
    service tags might not be available in all clouds and regions.
    For more information please visit http://aka.ms/servicetags
    .PARAMETER Cloud
        Specify the type of cloud.
        Default is 'Public'
        Accepted Values: 'Public','USGov','Germany','China'
    .EXAMPLE
    Get-AzureIPRangesAndServiceTags
    Retrieve the IP Ranges and Service Tags Ranges for Public Cloud
    This will output the Json File
    .EXAMPLE
    Get-AzureIPRangesAndServiceTags | ConvertFrom-Json
    Retrieve the IP Ranges and Service Tags Ranges for Public Cloud
    The Json is converted to a PowerShell Object
    .EXAMPLE
    Get-AzureIPRangesAndServiceTags -Cloud China
    Retrieve the IP Ranges and Service Tags Ranges for China
    This will output the Json File
    .NOTES
    Version History
    1.0 | 2020/01/14 | Francois-Xavier Cat
        Initial version
    .LINK
    https://github.com/lazywinadmin/PowerShell
    #>
    [CmdletBinding()]
    param(
        [ValidateSet('Public','USGov','Germany','China')]
        [system.string]
        $Cloud = "Public"
    )
    try{
        switch($Cloud){
            'USGov' {$downloadUri = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=57063'}
            'China' {$downloadUri = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=57062'}
            'Germany' {$downloadUri = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=57064'}
            default {$downloadUri = 'https://www.microsoft.com/en-us/download/confirmation.aspx?id=56519'}
        }

        Write-Verbose -Message "Retrieving Download link..."
        $downloadPage = Invoke-WebRequest -Uri $downloadUri
        $jsonFileUri = ($downloadPage.RawContent.Split('"') -like "https://*ServiceTags*")[0]

        if($jsonFileUri){
            Write-Verbose -Message "Downloading '$jsonFileUri'..."
            $TempFile = New-TemporaryFile
            Invoke-WebRequest -Uri $jsonFileUri -outfile $TempFile

            Get-Content -Path $TempFile -Raw
        }else{
            Write-Error -Message "Failed to find the download link in the page '$downloadUri'"
        }
    }catch{
        $PSCmdlet.ThrowTerminatingError($_)
    }
    }