Lua

Get a Summary of the MIME Structure

Demonstrates the Chilkat Mime.GetStructure method, which returns a concise summary of the MIME tree. The only argument selects the format: xml for XML, or text (the default for any other value) for a plain-text outline.

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

Background: A real message can nest multipart containers several levels deep — a multipart/mixed holding a multipart/alternative of text and HTML plus attachments — and GetStructure renders that hierarchy at a glance without the full content. It is the fast way to understand or debug an unfamiliar message's layout, in either a readable text outline or machine-parseable XML.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Mime.GetStructure method, which returns a concise summary of the MIME tree.
-- The only argument selects the output format: "xml" for XML, or "text" (the default) for a
-- plain-text outline.

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

-- Get a human-readable text outline of the MIME structure.
local structure = mime:get_structure("text")
if not mime.last_method_success then
    print(mime.last_error_text)
    return
end

print(structure)