Lua

Get the Content-Type of an Attachment

Demonstrates the Chilkat Email.GetAttachmentContentType method, which returns the Content-Type header field for the Nth attachment. Attachment indexing begins at 0. This example adds an attachment and reads its content type.

Background: The Content-Type (MIME type) of an attachment — such as text/plain, application/pdf, or image/png — tells a mail client how to handle the part: whether to display it inline, offer it as a download, or pick an icon for it. Reading it lets your program filter or route attachments by type, for example extracting only the PDFs from a batch of messages.

Chilkat Lua Downloads

Download Chilkat for Lua

Lua

local chilkat = require("chilkat")

-- Demonstrates the GetAttachmentContentType method, which returns the Content-Type header
-- field for the Nth attachment.  The index is zero-based.

local email = chilkat.Email.new()
email.subject = "Attachment content type"

email:add_string_attachment("notes.txt", "Some notes.")

-- Get the Content-Type of the first attachment (index 0).
local ct = email:get_attachment_content_type(0)
print("Attachment 0 Content-Type: " .. ct)