DSCResources/Grani_S3Content/Grani_S3Content.psm1
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#region Initialize function Initialize { # Enum for Item Type Add-Type -TypeDefinition @" public enum GraniDonwloadItemTypeEx { FileInfo, DirectoryInfo, Other, NotExists } "@ -ErrorAction SilentlyContinue # Enum for Ensure Add-Type -TypeDefinition @" public enum GraniDonwloadEnsuretype { Present, Absent } "@ -ErrorAction SilentlyContinue # Enum for CheckSum Add-Type -TypeDefinition @" public enum GraniDonwloadCheckSumtype { FileHash, FileName } "@ -ErrorAction SilentlyContinue } Initialize #endregion #region Message Definition $debugMessage = DATA { ConvertFrom-StringData -StringData " ExecuteScriptBlock = Execute ScriptBlock without Credential. '{0}' ExecuteScriptBlockWithCredential = Execute ScriptBlock with Credential. '{0}' FileExists = File found from DestinationPath. IsCheckSumFileName = CheckSum was '{0}', File already exist in destination path. Complete file checking. IsDestinationPathExist = Checking Destination Path is existing and Valid as a FileInfo IsDestinationPathAlreadyUpToDate = CheckSum was '{0}', matching FileHash to verify file is already Up-To-Date. IsFileAlreadyUpToDate = CurrentFileHash : S3 FileHash -> {0} : {1} IsS3ObjectExist = Testing S3 Object is exist or not. ItemTypeWasFile = Destination Path found as File : '{0}' ItemTypeWasDirectory = Destination Path found but was Directory : '{0}' ItemTypeWasOther = Destination Path found but was neither File nor Directory: '{0}' ItemTypeWasNotExists = Destination Path not found : '{0}' ValidateS3Bucket = Checking S3 Bucket '{0}' is exist. ValidateS3Object = Checking S3 Object Key '{0}' is exist. ValidateFilePath = Check DestinationPath '{0}' is FileInfo and Parent Directory already exist. " } $verboseMessage = DATA { ConvertFrom-StringData -StringData " AlreadyUpToDate = Current DestinationPath FileHash and S3 FileHash matched. File already Up-To-Date. NotUpToDate = Current DestinationPath FileHash and S3 FileHash not matched. Need to download latest file. ResultS3Bucket = S3Bucket exist status : S3Bucket {0}, Status : {1} ResultS3Object = S3Object exist status : S3Object {0}, Status : {1} StartS3Download = Downloading S3 Object. " } $exceptionMessage = DATA { ConvertFrom-StringData -StringData " DestinationPathAlreadyExistAsNotFile = Destination Path '{0}' already exist but not a file. Found itemType is {1}. Windows not allowed exist same name item. S3BucketNotExistEXception = Desired S3 Bucket not found exception. S3Bucket : {0} S3ObjectNotExistEXception = Desired S3 Object not found in S3Bucket exception. S3Bucket : {0}, S3Object : {1} ScriptBlockException = Error thrown on ScriptBlock. ScriptBlock : {0} " } #endregion #region *-TargetResource function Get-TargetResource { [OutputType([System.Collections.Hashtable])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String]$S3BucketName, [parameter(Mandatory = $false)] [System.String]$Key, [parameter(Mandatory = $true)] [System.String]$DestinationPath, [parameter(Mandatory = $false)] [System.String]$PreAction = [string]::Empty, [parameter(Mandatory = $false)] [System.String]$PostAction = [string]::Empty, [parameter(Mandatory = $false)] [System.Management.Automation.PSCredential]$Credential = [PSCredential]::Empty, [parameter(Mandatory = $false)] [ValidateSet("FileHash","FileName")] [System.String]$CheckSum = [GraniDonwloadCheckSumtype]::FileHash.ToString() ) # Initialize return values # Header and OAuth2Token will never return as TypeConversion problem $returnHash = @{ S3BucketName = $S3BucketName Key = $Key DestinationPath = $DestinationPath Ensure = [GraniDonwloadEnsuretype]::Absent.ToString() PreAction = $PreAction PostAction = $PostAction Credential = New-CimInstance -ClassName MSFT_Credential -Property @{Username=[string]$Credential.UserName; Password=[string]$null} -Namespace root/microsoft/windows/desiredstateconfiguration -ClientOnly CheckSum = $CheckSum } try { # Fail fast S3Bucket and S3Object existance. $isBucketExist = Test-S3Bucket -BucketName $S3BucketName; if (-not $isBucketExist) { Write-Verbose -Message ($verboseMessage.ResultS3Bucket -f $S3BucketName, $isBucketExist); return $returnHash } $isObjectExist = TestS3Object -BucketName $S3BucketName -Key $Key; if (-not $isObjectExist) { Write-Verbose -Message ($verboseMessage.ResultS3Object -f $Key, $isObjectExist); return $returnHash } # Start checking destination Path check if S3Bucket and S3Object exists Write-Debug -Message $debugMessage.IsDestinationPathExist $itemType = GetPathItemType -Path $DestinationPath $fileExists = $false switch ($itemType.ToString()) { ([GraniDonwloadItemTypeEx]::FileInfo.ToString()) { Write-Debug -Message ($debugMessage.ItemTypeWasFile -f $DestinationPath) $fileExists = $true } ([GraniDonwloadItemTypeEx]::DirectoryInfo.ToString()) { Write-Debug -Message ($debugMessage.ItemTypeWasDirectory -f $DestinationPath) } ([GraniDonwloadItemTypeEx]::Other.ToString()) { Write-Debug -Message ($debugMessage.ItemTypeWasOther -f $DestinationPath) return $returnHash } ([GraniDonwloadItemTypeEx]::NotExists.ToString()) { Write-Debug -Message ($debugMessage.ItemTypeWasNotExists -f $DestinationPath) return $returnHash } } # Already Up-to-date Check if ($fileExists -eq $true) { Write-Debug -Message $debugMessage.FileExists switch ($CheckSum) { ([GraniDonwloadCheckSumtype]::FileHash.ToString()) { Write-Debug -Message ($debugMessage.IsDestinationPathAlreadyUpToDate -f $CheckSum) $currentFileHash = GetFileHash -Path $DestinationPath $s3ObjectCache = GetS3ObjectHash -BucketName $S3BucketName -Key $Key Write-Debug -Message ($debugMessage.IsFileAlreadyUpToDate -f $currentFileHash, $s3ObjectCache) if ($currentFileHash -eq $s3ObjectCache) { Write-Verbose -Message $verboseMessage.AlreadyUpToDate $returnHash.Ensure = [GraniDonwloadEnsuretype]::Present.ToString() } else { Write-Verbose -Message $verboseMessage.NotUpToDate } } ([GraniDonwloadCheckSumtype]::FileName.ToString()) { # FileName only check : Is destination file exists or not. Write-Debug -Message ($debugMessage.IsCheckSumFileName -f $CheckSum) $returnHash.Ensure = [GraniDonwloadEnsuretype]::Present.ToString() } } } } catch { Write-Error $_ } return $returnHash } function Set-TargetResource { [OutputType([Void])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String]$S3BucketName, [parameter(Mandatory = $false)] [System.String]$Key, [parameter(Mandatory = $true)] [System.String]$DestinationPath, [parameter(Mandatory = $false)] [System.String]$PreAction = [string]::Empty, [parameter(Mandatory = $false)] [System.String]$PostAction = [string]::Empty, [parameter(Mandatory = $false)] [System.Management.Automation.PSCredential]$Credential = [PSCredential]::Empty, [parameter(Mandatory = $false)] [ValidateSet("FileHash","FileName")] [System.String]$CheckSum = [GraniDonwloadCheckSumtype]::FileHash.ToString() ) # validate S3 Bucket is exist ValidateS3Bucket -BucketName $S3BucketName ValidateS3Object -BucketName $S3BucketName -Key $Key # validate DestinationPath is valid ValidateFilePath -Path $DestinationPath # PreAction ExecuteScriptBlock -ScriptBlockString $PreAction -Credential $Credential # Start Download Write-Verbose $verboseMessage.StartS3Download Read-S3Object -BucketName $S3BucketName -Key $Key -File $DestinationPath # PostAction ExecuteScriptBlock -ScriptBlockString $PostAction -Credential $Credential } function Test-TargetResource { [OutputType([System.Boolean])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String]$S3BucketName, [parameter(Mandatory = $false)] [System.String]$Key, [parameter(Mandatory = $true)] [System.String]$DestinationPath, [parameter(Mandatory = $false)] [System.String]$PreAction = [string]::Empty, [parameter(Mandatory = $false)] [System.String]$PostAction = [string]::Empty, [parameter(Mandatory = $false)] [System.Management.Automation.PSCredential]$Credential = [PSCredential]::Empty, [parameter(Mandatory = $false)] [ValidateSet("FileHash","FileName")] [System.String]$CheckSum = [GraniDonwloadCheckSumtype]::FileHash.ToString() ) $param = @{ S3BucketName = $S3BucketName Key = $Key DestinationPath = $DestinationPath PreAction = $PreAction PostAction = $PostAction CheckSum = $CheckSum } return (Get-TargetResource @param).Ensure -eq [GraniDonwloadEnsuretype]::Present.ToString() } #endregion #region S3 Helper function TestS3Object { [OutputType([Boolean])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [string]$BucketName, [parameter(Mandatory = $true)] [string]$Key ) Write-Debug -Message ($debugMessage.IsS3ObjectExist) $objects = Get-S3Object -BucketName $BucketName $result = $null $dic = New-Object "System.Collections.Generic.Dictionary[[string], [string]]" $objects | %{ $dic.Add($_.Key, $_.Etag) } return $dic.TryGetValue($Key, [ref]$result) } #endregion #region Validation Helper function ValidateS3Bucket { [OutputType([Void])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [string]$BucketName ) Write-Debug -Message ($debugMessage.ValidateS3Bucket -f $BucketName) if (-not (Test-S3Bucket -BucketName $BucketName)) { throw New-Object System.NullReferenceException ($exceptionMessage.S3BucketNotExistEXception -f $BucketName) } } function ValidateS3Object { [OutputType([Void])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [string]$BucketName, [parameter(Mandatory = $true)] [string]$Key ) Write-Debug -Message ($debugMessage.ValidateS3Object -f $Key) if (-not (TestS3Object -BucketName $BucketName -Key $Key)) { throw New-Object System.NullReferenceException ($exceptionMessage.S3ObjectNotExistEXception -f $BucketName, $Key) } } function ValidateFilePath { [OutputType([Void])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [string]$Path ) Write-Debug -Message ($debugMessage.ValidateFilePath -f $Path) $itemType = GetPathItemType -Path $Path switch ($itemType.ToString()) { ([GraniDonwloadItemTypeEx]::FileInfo.ToString()) { return; } ([GraniDonwloadItemTypeEx]::NotExists.ToString()) { # Create Parent Directory check $parentPath = Split-Path $Path -Parent if (-not (Test-Path -Path $parentPath)) { [System.IO.Directory]::CreateDirectory($parentPath) > $null } } Default { $errorId = "FileValidationFailure" $errorMessage = $exceptionMessage.DestinationPathAlreadyExistAsNotFile -f $Path, $itemType.ToString() ThrowInvalidDataException -ErrorId $errorId -ErrorMessage $errorMessage } } } #endregion #region Hash Helper function GetFileHash { [OutputType([string])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [string]$Path ) return (Get-FileHash -Path $Path -Algorithm MD5).Hash } function GetS3ObjectHash { [OutputType([string])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [string]$BucketName, [parameter(Mandatory = $true)] [string]$Key ) return (Get-S3Object -BucketName $BucketName -Key $Key).ETag.Replace('"', "") } #endregion #region ItemType Helper function GetPathItemType { [OutputType([GraniDonwloadItemTypeEx])] [CmdletBinding()] param ( [parameter(Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [Alias("FullName", "LiteralPath", "PSPath")] [System.String]$Path = [string]::Empty ) $type = [string]::Empty # Check type of the Path Item if (-not (Test-Path -Path $Path)) { return [GraniDonwloadItemTypeEx]::NotExists } $pathItem = Get-Item -Path $path $pathItemType = $pathItem.GetType().FullName $type = switch ($pathItemType) { "System.IO.FileInfo" { [GraniDonwloadItemTypeEx]::FileInfo } "System.IO.DirectoryInfo" { [GraniDonwloadItemTypeEx]::DirectoryInfo } Default { [GraniDonwloadItemTypeEx]::Other } } return $type } #endregion #region ScriptBlock Execute Helper function ExecuteScriptBlock { [OutputType([Void])] [CmdletBinding()] param ( [parameter(Mandatory = $false)] [System.String]$ScriptBlockString = [string]::Empty, [parameter(Mandatory = $false)] [System.Management.Automation.PSCredential]$Credential = [PSCredential]::Empty ) if ($ScriptBlockString -eq [string]::Empty){ return; } try { $scriptBlock = [ScriptBlock]::Create($ScriptBlockString).GetNewClosure(); if ($Credential -eq [PSCredential]::Empty) { Write-Debug ($debugMessage.ExecuteScriptBlock -f $ScriptBlockString) $scriptBlock.Invoke() | Out-String -Stream | Write-Debug } else { Write-Debug ($debugMessage.ExecuteScriptBlockWithCredential -f $ScriptBlockString) Invoke-Command -ScriptBlock $scriptBlock -Credential $Credential -ComputerName . | Out-String -Stream | Write-Debug } } catch { Write-Debug ($exceptionMessage.ScriptBlockException -f $ScriptBlockString) throw $_; } } #endregion #region Exception Helper function ThrowInvalidDataException { [OutputType([Void])] [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String]$ErrorId, [parameter(Mandatory = $true)] [System.String]$ErrorMessage ) $errorCategory = [System.Management.Automation.ErrorCategory]::InvalidData $exception = New-Object System.InvalidOperationException $ErrorMessage $errorRecord = New-Object System.Management.Automation.ErrorRecord $exception, $ErrorId, $errorCategory, $null throw $errorRecord } #endregion Export-ModuleMember -Function *-TargetResource |