Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Get-FileEncoding function determines encoding by looking at Byte Order Mark (BOM).
<#
.SYNOPSIS
Gets file encoding.
.DESCRIPTION
The Get-FileEncoding function determines encoding by looking at Byte Order Mark (BOM).
Based on port of C# code from http://www.west-wind.com/Weblog/posts/197245.aspx
.OUTPUTS
System.Text.Encoding
.PARAMETER Path
The Path of the file that we want to check.
.PARAMETER DefaultEncoding
The Encoding to return if one cannot be inferred.
You may prefer to use the System's default encoding: [System.Text.Encoding]::Default
List of available Encodings is available here: http://goo.gl/GDtzj7
.EXAMPLE
# This command gets ps1 files in current directory where encoding is not ASCII
Get-ChildItem *.ps1 | select FullName, @{n='Encoding';e={Get-FileEncoding $_.FullName}} | where {[string]$_.Encoding -ne 'System.Text.ASCIIEncoding'}
.EXAMPLE
# Same as previous example but fixes encoding using set-content
Get-ChildItem *.ps1 | select FullName, @{n='Encoding';e={Get-FileEncoding $_.FullName}} | where {[string]$_.Encoding -ne 'System.Text.ASCIIEncoding'} | foreach {(get-content $_.FullName) | set-content $_.FullName -Encoding ASCII}
.NOTES
Version History
v1.0 - 2010/08/10, Chad Miller - Initial release
v1.1 - 2010/08/16, Jason Archer - Improved pipeline support and added detection of little endian BOMs. (http://poshcode.org/2075)
v1.2 - 2015/02/03, VertigoRay - Adjusted to use .NET's [System.Text.Encoding Class](http://goo.gl/XQNeuc). (http://poshcode.org/5724)
.LINK
http://goo.gl/bL12YV
#>
function Get-FileEncoding {
[CmdletBinding()]
param (
[Alias("PSPath")]
[Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)]
[String]$Path
,
[Parameter(Mandatory = $False)]
[System.Text.Encoding]$DefaultEncoding = [System.Text.Encoding]::ASCII
)
process {
[Byte[]]$bom = Get-Content -Encoding Byte -ReadCount 4 -TotalCount 4 -Path $Path
$encoding_found = $false
foreach ($encoding in [System.Text.Encoding]::GetEncodings().GetEncoding()) {
$preamble = $encoding.GetPreamble()
if ($preamble) {
foreach ($i in 0..$preamble.Length) {
if ($preamble[$i] -ne $bom[$i]) {
break
} elseif ($i -eq $preable.Length) {
$encoding_found = $encoding
}
}
}
}
if (!$encoding_found) {
$encoding_found = $DefaultEncoding
}
$encoding_found
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.