PowerShell

Check if a MIME Part is Plain Text

Demonstrates the Chilkat Mime.IsPlainText method, which returns whether the Content-Type is exactly text/plain. It takes no arguments and applies to the current part.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Inside a multipart/alternative, this is how you pick out the plain-text rendering — the fallback to show when HTML cannot be displayed, or the version to index for search. It is the specific counterpart to IsHtml.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  Demonstrates the Mime.IsPlainText method, which returns whether the Content-Type is text/plain.  It takes no arguments and applies to the current
#  part.  This example iterates the parts of a multipart message and reports which ones match.

$mime = New-Object Chilkat.Mime
$success = $mime.LoadMimeFile("qa_data/multipart_message.eml")
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

$n = $mime.NumParts
$part = New-Object Chilkat.Mime

for ($i = 0; $i -le $n - 1; $i++) {
    $success = $mime.PartAt($i,$part)
    if ($success -eq $false) {
        $($mime.LastErrorText)
        exit
    }

    if ($part.IsPlainText()) {
        $("Part " + $i + " (" + $part.ContentType + ") is plain text.")
    }

}