Lua

Upload Application Specific Data

See more Google Drive Examples

Uploads a text file (application specific data) where the contents of the file are contained in a string variable. Lua

local chilkat = require("chilkat")

local success = true

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

-- This example uses a previously obtained access token having permission for the
-- Google Drive application specific data scope.
local jsonToken = chilkat.JsonObject.new()
success = jsonToken:load_file("qa_data/tokens/googleDriveAppData.json")

local gAuth = chilkat.AuthGoogle.new()
gAuth.access_token = jsonToken:string_of("access_token")

local rest = chilkat.Rest.new()

-- Connect using TLS.
local bAutoReconnect = true
success = rest:connect("www.googleapis.com", 443, true, bAutoReconnect)

-- Provide the authentication credentials (i.e. the access token)
rest:set_auth_google(gAuth)

-- A multipart upload to Google Drive needs a multipart/related Content-Type
rest:add_header("Content-Type", "multipart/related")

-- Specify each part of the request.

-- The 1st part is JSON with information about the file.
rest.part_selector = "1"
rest:add_header("Content-Type", "application/json; charset=UTF-8")

local json = chilkat.JsonObject.new()
json.emit_compact = false

json:update_string("name", "helloWorld.txt")
json:update_string("description", "A simple text file that says Hello World.")
json:update_string("mimeType", "text/plain")
-- Specifiy the application-specific data folder.
json:update_string("parents[0]", "appDataFolder")
rest:set_multipart_body_string(json:emit())

print(json:emit())

-- The JSON looks like this:
-- {
--   "name": "helloWorld.txt",
--   "description": "A simple text file that says Hello World.",
--   "mimeType": "text/plain",
--   "parents": [
--     "appDataFolder"
--   ]
-- }

-- The 2nd part is the file content.
-- In this case, we'll upload a simple text file containing "Hello World!"
rest.part_selector = "2"
rest:add_header("Content-Type", "text/plain")

local fileContents = "Hello World!"
rest:set_multipart_body_string(fileContents)

local jsonResponse = rest:full_request_multipart("POST", "/upload/drive/v3/files?uploadType=multipart")
if not rest.last_method_success then
    print(rest.last_error_text)
    return
end

-- A successful response will have a status code equal to 200.
if rest.response_status_code ~= 200 then
    print("response status code = " .. rest.response_status_code)
    print("response status text = " .. rest.response_status_text)
    print("response header: " .. rest.response_header)
    print("response JSON: " .. jsonResponse)
    return
end

-- Show the JSON response.
json:load(jsonResponse)

-- Show the full JSON response.
json.emit_compact = false
print(json:emit())

-- A successful response looks like this:
-- {
--   "kind": "drive#file",
--   "id": "0B53Q6OSTWYoldmJ0Z3ZqT2x5MFk",
--   "name": "Untitled",
--   "mimeType": "text/plain"
-- }

-- Get the fileId:
print("fileId: " .. json:string_of("id"))