Lua

Check if a MIME Entity is multipart/related

Demonstrates the Chilkat Mime.IsMultipartRelated method, which returns whether the Content-Type is exactly multipart/related. 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: multipart/related signals that the parts belong together — typically an HTML body plus the inline images it references by Content-ID. Detecting it tells your code the non-primary parts are embedded resources, not standalone attachments to list.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Mime.IsMultipartRelated method, which returns whether the Content-Type is multipart/related.  It takes no arguments.

local mime = chilkat.Mime.new()
local success = mime:load_mime_file("qa_data/multipart_message.eml")
if not success then
    print(mime.last_error_text)
    return
end

if mime:is_multipart_related() then
    print("This is a multipart/related entity.")
else
    print("This is not multipart/related.")
end