HostFile.ps1
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Function global:Open-HostFile() { Param ( [Parameter(Mandatory=$false )] [ValidateScript({Test-Path $_})] [string]$HostFilePath = "$env:windir\System32\drivers\etc\hosts" ) $process = Resolve-Path "$env:windir\system32\notepad.exe" Start-Process $process -ArgumentList $HostFilePath -Verb RunAs -PassThru } Function Get-HostFileEntries() { Param ( [Parameter(Mandatory=$false)] [ValidateScript({Test-Path $_})] [string]$HostFilePath = "$env:windir\System32\drivers\etc\hosts" ) # Fetch content of the hostfile and keep only the non-default adresses Get-Content $HostFilePath | Where-Object {-not ([string]::IsNullOrWhiteSpace($_) -or $_ -like "#*")} } Function Add-HostFileEntries() { Param( [Parameter(Mandatory=$true)] [string] $ip, [Parameter(Mandatory=$true)] [string] $hostname, [Parameter(Mandatory=$false)] [ValidateScript({Test-Path $_})] [string]$hostFilePath = "$env:windir\System32\drivers\etc\hosts", [Parameter(Mandatory=$false)] [string] $comment ) # Remove empty entries and separate ips from hostnames for comparison $currentEntries = Get-HostFileEntries $hostFilePath | ForEach-Object { if (-not [string]::IsNullOrWhiteSpace($_)) { $_.Split(" ", [System.StringSplitOptions]::RemoveEmptyEntries) } } if ($currentEntries -contains $hostname -or $currentEntries -contains $ip) { throw [System.Exception]("Duplicate Entry. The entry already exist " + $ip + " " + $hostname) } $hostEntryLine = "`r`n$ip $hostname" if (-not [string]::IsNullOrWhiteSpace($comment)) { if ($comment -notlike "#*") { $comment = "#$comment" } $hostEntryLine = "`r`n$comment$hostEntryLine" } Add-Content $HostFilePath $hostEntryLine -Force -NoNewline } |