Lua

Add Data to multipart/form-data Request

See more HTTP Examples

Demonstrates how to add content (such as a JPG, PDF, XML, etc.) to multipart/form-data requests. Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

local req = chilkat.HttpRequest.new()
req.http_verb = "POST"
req.content_type = "multipart/form-data"
req.path = "/xyz/something"

req:add_param("param1", "value1")
req:add_param("param2", "value2")

-- Add some small files to the request. (Small so we can see what the full request looks like without too much data..)
local bd = chilkat.BinData.new()
local success = bd:load_file("qa_data/jpg/starfish20.jpg")
req:add_bd_for_upload("starfish20", "starfish20.jpg", bd, "image/jpeg")

success = bd:load_file("qa_data/pdf/helloWorld.pdf")
req:add_bd_for_upload("helloWorld", "helloWorld.pdf", bd, "application/pdf")

success = bd:load_file("qa_data/xml/tinyA.xml")
req:add_bd_for_upload("tinyA", "tinyA.xml", bd, "text/xml")

-- This HTTP request contains binary data, so we cannot call GenerateRequestText
-- to examine it as a string.  We can instead call GenerateRequestFile
-- to write the request to a file and then examine using a hex editor,
-- or an editor that is capable of handling null bytes and non-printable chars (perhaps by displaying "?" chars instead).
req:generate_request_file("qa_output/multipartFormDataRequest.bin")

print("OK.")

-- This is the HTTP multipart/form-data request built by the above code:

-- POST /xyz/something HTTP/1.1
-- Host: domain
-- Content-Type: multipart/form-data; boundary=------------090708030009010000030901
-- Content-Length: 2220
--
-- --------------090708030009010000030901
-- Content-Disposition: form-data; name="param1"
--
-- value1
-- --------------090708030009010000030901
-- Content-Disposition: form-data; name="param2"
--
-- value2
-- --------------090708030009010000030901
-- Content-Disposition: form-data; name="starfish20"; filename="starfish20.jpg"
-- Content-Type: image/jpeg
--
-- JPEG DATA HERE...
-- --------------090708030009010000030901
-- Content-Disposition: form-data; name="helloWorld"; filename="helloWorld.pdf"
-- Content-Type: application/pdf
--
-- PDF DATA HERE...
-- --------------090708030009010000030901
-- Content-Disposition: form-data; name="tinyA"; filename="tinyA.xml"
-- Content-Type: text/xml
--
-- XML DATA HERE...
-- --------------090708030009010000030901--
--