Ruby

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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require 'chilkat'

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 = Chilkat::CkMime.new()
success = mime.LoadMimeFile("qa_data/multipart_message.eml")
if (success == false)
    print mime.lastErrorText() + "\n";
    exit
end

n = mime.get_NumParts()
part = Chilkat::CkMime.new()

for i in 0 .. n - 1
    success = mime.PartAt(i,part)
    if (success == false)
        print mime.lastErrorText() + "\n";
        exit
    end

    if (part.IsPlainText())
        print "Part " + i.to_s() + " (" + part.contentType() + ") is plain text." + "\n";
    end

end