Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
PowerShell cmdlet for converting *.eml files to html
##
## Source: https://chris.dziemborowicz.com/blog/2013/05/11/how-to-convert-eml-files-to-html-using-powershell/
##
## Usage: ConvertFrom-EmlToHtml
##
function ConvertFrom-EmlToHtml
{
[CmdletBinding()]
Param
(
[Parameter(ParameterSetName="Path", Position=0, Mandatory=$True)]
[String]$Path,
[Parameter(ParameterSetName="LiteralPath", Mandatory=$True)]
[String]$LiteralPath,
[Parameter(ParameterSetName="FileInfo", Mandatory=$True, ValueFromPipeline=$True)]
[System.IO.FileInfo]$Item
)
Process
{
switch ($PSCmdlet.ParameterSetName)
{
"Path" { $files = Get-ChildItem -Path $Path }
"LiteralPath" { $files = Get-ChildItem -LiteralPath $LiteralPath }
"FileInfo" { $files = $Item }
}
$files | % {
# Work out file names
$emlFn = $_.FullName
$htmlFn = $emlFn -replace '\.eml$', '.html'
# Skip non-.msg files
if ($emlFn -notlike "*.eml") {
Write-Verbose "Skipping $_ (not an .eml file)..."
return
}
# Do not try to overwrite existing files
if (Test-Path -LiteralPath $htmlFn) {
Write-Verbose "Skipping $_ (.html already exists)..."
return
}
# Read EML
Write-Verbose "Reading $_..."
$adoDbStream = New-Object -ComObject ADODB.Stream
$adoDbStream.Open()
$adoDbStream.LoadFromFile($emlFn)
$cdoMessage = New-Object -ComObject CDO.Message
$cdoMessage.DataSource.OpenObject($adoDbStream, "_Stream")
# Generate HTML
Write-Verbose "Generating HTML..."
$html = "<!DOCTYPE html>`r`n"
$html += "<html>`r`n"
$html += "<head>`r`n"
$html += "<meta charset=`"utf-8`">`r`n"
$html += "<title>" + $cdoMessage.Subject + "</title>`r`n"
$html += "</head>`r`n"
$html += "<body style=`"font-family: sans-serif; font-size: 11pt`">`r`n"
$html += "<div style=`"margin-bottom: 1em;`">`r`n"
$html += "<strong>From: </strong>" + $cdoMessage.From + "<br>`r`n"
$html += "<strong>Sent: </strong>" + $cdoMessage.SentOn + "<br>`r`n"
$html += "<strong>To: </strong>" + $cdoMessage.To + "<br>`r`n"
if ($cdoMessage.CC -ne "") {
$html += "<strong>Cc: </strong>" + $cdoMessage.CC + "<br>`r`n"
}
if ($cdoMessage.BCC -ne "") {
$html += "<strong>Bcc: </strong>" + $cdoMessage.BCC + "<br>`r`n"
}
$html += "<strong>Subject: </strong>" + $cdoMessage.Subject + "<br>`r`n"
$html += "</div>`r`n"
if ($cdoMessage.HTMLBody -ne "") {
$html += "<div>`r`n"
$html += $cdoMessage.HTMLBody + "`r`n"
$html += "</div>`r`n"
} else {
$html += "<div><pre>"
$html += $cdoMessage.TextBody
$html += "</pre></div>`r`n"
}
$html += "</body>`r`n"
$html += "</html>`r`n"
# Write HTML
Write-Verbose "Saving HTML..."
Add-Content -LiteralPath $htmlFn $html
# Output to pipeline
Get-ChildItem -LiteralPath $htmlFn
}
}
End
{
Write-Verbose "Done."
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment