Lua

Add a Related Item from BinData by Content-Location

Demonstrates the Chilkat Email.AddRelatedBd2 method, which adds a related item using the binary data in a BinData object, addressed by Content-Location. The second argument specifies the filename, path, or URL used by the corresponding HTML reference. This example embeds an image referenced as logo.png.

Background: This is the binary counterpart of AddRelatedString2 and the Content-Location sibling of AddRelatedBd. Instead of a generated cid: reference, the HTML keeps an ordinary src="logo.png" and the related part is matched to it by name — convenient when turning an existing web page into an email so its original relative URLs keep working.

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Lua

local chilkat = require("chilkat")

-- Demonstrates the AddRelatedBd2 method, which adds a related item using the binary data in
-- a BinData object, addressed by Content-Location.  The second argument specifies the filename/path/URL
-- used by the corresponding HTML reference.

local email = chilkat.Email.new()
email.subject = "Related image from BinData (Content-Location)"

-- The HTML references the image by the same name used as the Content-Location.
email:set_html_body("<html><body><img src=\"logo.png\"/></body></html>")

-- Load the image data from a file into a BinData object.
local bdImage = chilkat.BinData.new()
local success = bdImage:load_file("qa_data/images/logo.png")
if not success then
    print(bdImage.last_error_text)
    return
end

-- Add the image as a related item addressed by Content-Location "logo.png".
success = email:add_related_bd2(bdImage, "logo.png")
if not success then
    print(email.last_error_text)
    return
end

print("NumRelatedItems = " .. email.num_related_items)

-- Note: The path "qa_data/images/logo.png" is a relative local filesystem path,
-- relative to the current working directory of the running application.