Lua

Create a multipart/related MIME Entity

Demonstrates the Chilkat Mime.NewMultipartRelated method, which initializes the object as an empty multipart/related entity. It takes no arguments; the primary part and its related resources are then appended.

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: multipart/related ties a primary part to the resources it references — most commonly an HTML body and the inline images it embeds via cid: references. Unlike a plain attachment, a related image is displayed within the message rather than listed separately. The HTML part comes first, followed by each referenced resource with a matching Content-ID.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the Mime.NewMultipartRelated method, which initializes the object as an empty
-- multipart/related entity, clearing any existing content.  It takes no arguments.

local mime = chilkat.Mime.new()

local success = mime:new_multipart_related()
if not success then
    print(mime.last_error_text)
    return
end

-- multipart/related groups a primary part with the resources it references, such as an HTML body
-- and the inline images it displays.
local htmlPart = chilkat.Mime.new()
success = htmlPart:set_body_from_html("<html><body><img src=\"cid:logo\"></body></html>")
if not success then
    print(htmlPart.last_error_text)
    return
end

success = mime:append_part(htmlPart)
if not success then
    print(mime.last_error_text)
    return
end

success = mime:append_part_from_file("qa_data/logo.png")
if not success then
    print(mime.last_error_text)
    return
end

print("Number of parts: " .. mime.num_parts)