Lua

Set a MIME Body from Binary Bytes (BinData)

Demonstrates the Chilkat Mime.SetBodyBd method, which sets the decoded body bytes from a BinData, changes the transfer encoding to base64, and preserves the bytes exactly. The only argument is the BinData.

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: This is the direct way to put arbitrary binary content into a part from memory — a generated image, a decrypted blob — without a temporary file. Chilkat base64-encodes it so the bytes survive text-based transports unchanged. Note it does not set a Content-Type or disposition, so assign those yourself to describe what the bytes are.

Chilkat Lua Downloads

Download Chilkat for Lua

Lua

local chilkat = require("chilkat")

-- Demonstrates the Mime.SetBodyBd method, which sets the decoded body bytes from a BinData,
-- changes the transfer encoding to base64, and preserves the bytes exactly.  The only argument is
-- the BinData.

-- Put the binary body bytes into a BinData.
local bd = chilkat.BinData.new()
local success = bd:load_file("qa_data/photo.jpg")
if not success then
    print(bd.last_error_text)
    return
end

local mime = chilkat.Mime.new()

-- Set a Content-Type for the binary content (SetBodyBd does not set one itself).
mime.content_type = "image/jpeg"

success = mime:set_body_bd(bd)
if not success then
    print(mime.last_error_text)
    return
end

print("Body set from " .. bd.num_bytes .. " bytes.")