DSCResources/MSFT_xWebConfigKeyValue/MSFT_xWebConfigKeyValue.psm1
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function Get-TargetResource { [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [parameter(Mandatory = $true)] [System.String] $WebsitePath, [parameter(Mandatory = $true)] [ValidateSet("AppSettings")] [System.String] $ConfigSection, [parameter(Mandatory = $true)] [String] $Key ) $existingvalue = Get-ItemValue -key $Key -isAttribute $false -websitePath $WebsitePath -configSection $ConfigSection if($existingvalue -eq $null) { $existingvalue = Get-ItemValue -key $Key -isAttribute $true -websitePath $WebsitePath -configSection $ConfigSection } if($existingvalue.Length -eq 0) { return @{ Ensure = "Absent" Key = $Key Value = $existingvalue } } return @{ Ensure = "Present" Key = $Key Value = $existingvalue } } function Set-TargetResource { [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String] $WebsitePath, [parameter(Mandatory = $true)] [ValidateSet("AppSettings")] [System.String] $ConfigSection, [ValidateSet("Present","Absent")] [System.String] $Ensure = "Present", [parameter(Mandatory = $true)] [String] $Key, [String] $Value, [System.Boolean] $IsAttribute ) if($Ensure -eq "Present") { $existingvalue = Get-ItemValue -key $Key -isAttribute $IsAttribute -websitePath $WebsitePath -configSection $ConfigSection if((!$IsAttribute -and ($existingvalue -eq $null)) -or ($IsAttribute -and ($existingvalue.Length -eq 0))) { Add-Item -key $Key -value $Value -isAttribute $IsAttribute -websitePath $WebsitePath -configSection $ConfigSection } else { $propertyName ="value" if($IsAttribute) { $propertyName = $Key } Modify-Item -propertyName $propertyName -oldValue $existingvalue -newValue $Value -isAttribute $IsAttribute -websitePath $WebsitePath -configSection $ConfigSection } } else { Remove-Item -key $Key -isAttribute $IsAttribute -websitePath $WebsitePath -configSection $ConfigSection } } function Test-TargetResource { [CmdletBinding()] [OutputType([System.Boolean])] param ( [parameter(Mandatory = $true)] [System.String] $WebsitePath, [parameter(Mandatory = $true)] [ValidateSet("AppSettings")] [System.String] $ConfigSection, [ValidateSet("Present","Absent")] [System.String] $Ensure = "Present", [parameter(Mandatory = $true)] [String] $Key, [String] $Value, [System.Boolean] $IsAttribute ) if(!$PSBoundParameters.ContainsKey('IsAttribute')) { $IsAttribute = $false } $existingvalue = Get-ItemValue -key $Key -isAttribute $IsAttribute -websitePath $WebsitePath -configSection $ConfigSection if($Ensure -eq "Present") { if(!$IsAttribute) { if(($existingvalue -eq $null) -or ($existingvalue -ne $Value)) { return $false } else { return $true } } else { if(($existingvalue.Length -eq 0) -or ($existingvalue -ne $Value)) { return $false } else { return $true } } } else { if(!$IsAttribute) { if(($existingvalue -eq $null)) { return $true } else { return $false } } else { if(($existingvalue.Length -eq 0)) { return $true } else { return $false } } } } function Add-item([string]$key, [string]$value, [Boolean]$isAttribute, [string]$websitePath, [string]$configSection) { $defaultFilter = $configSection $itemCollection = @{key=$key;value=$value} if(!$isAttribute) { Add-WebConfigurationProperty -filter $defaultFilter -name "." -value $itemCollection -PSPath $websitePath } else { Set-WebConfigurationProperty -filter $defaultFilter -PSPath $websitePath -name $key -value $value -WarningAction Stop } } function Modify-Item([string]$propertyName, [string]$oldValue, [string]$newValue, [Boolean]$isAttribute, [string]$websitePath, [string]$configSection) { $defaultFilter = $configSection if(!$isAttribute) { $filter= "$defaultFilter/add[@$propertyName=`'$oldValue`']" Set-WebConfigurationProperty -filter $filter -PSPath $websitePath -name $propertyName -value $newValue -WarningAction Stop } else { Set-WebConfigurationProperty -Filter $defaultFilter -PSPath $websitePath -name $propertyName -value $newValue -WarningAction Stop } } function Remove-Item([string]$key, [Boolean]$isAttribute, [string]$websitePath, [string]$configSection) { $defaultFilter = $configSection if(!$isAttribute) { $filter = "$defaultFilter/add[@key=`'$key`']" Clear-WebConfiguration -Filter $filter -PSPath $websitePath -WarningAction Stop } else { $filter = "$defaultFilter/@$key" # this is a workaround to ensure if appSettings has no collection and we try to delete the only attribute, the entire node is not deleted. # if we try removing the only attribute even if there is one collection item, the node is preserved. I am not able to find a way to do this #using clear-webconfiguration alone. Add-item -key "dummyKey" -value "dummyValue" -isAttribute $false -websitePath $websitePath -configSection $configSection clear-WebConfiguration -filter $filter -PSPath $websitePath -WarningAction Stop Remove-Item -key "dummyKey" -isAttribute $false -websitePath $websitePath -configSection $configSection } } function Get-ItemValue([string]$key, [Boolean]$isAttribute, [string]$websitePath, [string]$configSection) { # if not present, $value.Value will be null $defaultFilter = $configSection if(!$isAttribute) { $filter = "$defaultFilter/add[@key=`'$key`']" $value = Get-WebConfigurationProperty -Filter $filter -Name "value" -PSPath $websitePath } else { $value = Get-WebConfigurationProperty -filter $defaultFilter -name "$key" -PSPath $websitePath } return $value.Value } Export-ModuleMember -Function *-TargetResource |