Ruby

Check if a MIME Entity is multipart/alternative

Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. It takes no arguments.

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: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

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Ruby

require 'chilkat'

success = false

#  Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

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

if (mime.IsMultipartAlternative())
    print "This is a multipart/alternative entity." + "\n";
else
    print "This is not multipart/alternative." + "\n";
end