Functions/FilesandFolders/Test-IsFileBinary.ps1
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function Test-IsFileBinary { <# .SYNOPSIS Test if a file is binary .DESCRIPTION Test if a file is binary like .exe or .zip. I found this code snippet on Stackoverflow: https://stackoverflow.com/questions/1077634/powershell-search-script-that-ignores-binary-files .EXAMPLE Test-IsFileBinary -FilePath "E:\Temp\Files\File_01.txt" False .EXAMPLE Test-IsFileBinary -FilePath "E:\Temp\Files\File_04.zip" True #> [CmdletBinding()] [OutputType('System.Boolean')] Param( [Parameter( Position=0, Mandatory=$true, ValueFromPipeline=$true, HelpMessage="Path to file which should be checked")] [ValidateScript({ if(Test-Path -Path $_ -PathType Leaf) { return $true } else { throw "Enter a valid file path!" } })] [String]$FilePath ) Begin{ } Process{ # Encoding variable $Encoding = [String]::Empty # Get the first 1024 bytes from the file $ByteCount = 1024 $ByteArray = Get-Content -Path $FilePath -Encoding Byte -TotalCount $ByteCount if($ByteArray.Count -ge $ByteCount) { Write-Verbose -Message "Could only read $($ByteArray.Count)/$ByteCount Bytes. File " } if(($ByteArray.Count -ge 4) -and (("{0:X}{1:X}{2:X}{3:X}" -f $ByteArray) -eq "FFFE0000")) { Write-Verbose -Message "UTF-32 detected!" $Encoding = "UTF-32" } elseif(($ByteArray.Count -ge 4) -and (("{0:X}{1:X}{2:X}{3:X}" -f $ByteArray) -eq "0000FEFF")) { Write-Verbose -Message "UTF-32 BE detected!" $Encoding = "UTF-32 BE" } elseif(($ByteArray.Count -ge 3) -and (("{0:X}{1:X}{2:X}" -f $ByteArray) -eq "EFBBBF")) { Write-Verbose -Message "UTF-8 detected!" $Encoding = "UTF-8" } elseif(($ByteArray.Count -ge 2) -and (("{0:X}{1:X}" -f $ByteArray) -eq "FFFE")) { Write-Verbose -Message "UTF-16 detected!" $Encoding = "UTF-16" } elseif(($ByteArray.Count -ge 2) -and (("{0:X}{1:X}" -f $ByteArray) -eq "FEFF")) { Write-Verbose "UTF-16 BE detected!" $Encoding = "UTF-16 BE" } if(-not([String]::IsNullOrEmpty($Encoding))) { Write-Verbose -Message "File is text encoded!" return $false } # So now we're done with Text encodings that commonly have '0's # in their byte steams. ASCII may have the NUL or '0' code in # their streams but that's rare apparently. # Both GNU Grep and Diff use variations of this heuristic if($byteArray -contains 0 ) { Write-Verbose -Message "File is a binary!" return $true } Write-Verbose -Message "File should be ASCII encoded!" return $false } End{ } } |