Lua

Get Access Token for Google Tasks using Service Account JSON Key

See more Google Tasks Examples

Demonstrates how to get an access token for the Google Tasks API using a Service Account JSON key. Lua

local chilkat = require("chilkat")

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

-- First load the JSON key into a string.
local fac = chilkat.FileAccess.new()
local jsonKey = fac:read_entire_text_file("qa_data/googleSvcAccountKeys/ChilkatCloud-48f7737c7505.json", "utf-8")
if not fac.last_method_success then
    print(fac.last_error_text)
    return
end

-- A JSON private key should look like this:

-- {
--   "type": "service_account",
--   "project_id": "chilkatcloud",
--   "private_key_id": "48f7737c7505bb88eee6a20d09993e10605d466e",
--   "private_key": "-----BEGIN PRIVATE KEY----- ... -----END PRIVATE KEY-----\n",
--   "client_email": "pip-564@chilkatcloud.iam.gserviceaccount.com",
--   "client_id": "109982228323456925225",
--   "auth_uri": "https://accounts.google.com/o/oauth2/auth",
--   "token_uri": "https://oauth2.googleapis.com/token",
--   "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
--   "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/pip-564%40chilkatcloud.iam.gserviceaccount.com"
-- }

local gAuth = chilkat.AuthGoogle.new()
gAuth.json_key = jsonKey

-- Choose the scope for read/write access.
gAuth.scope = "https://www.googleapis.com/auth/tasks"

-- Request an access token that is valid for this many seconds.
gAuth.expire_num_seconds = 3600

gAuth.sub_email_address = ""

-- Connect to www.googleapis.com using TLS
local tlsSock = chilkat.Socket.new()
local success = tlsSock:connect("www.googleapis.com", 443, true, 5000)
if not success then
    print(tlsSock.last_error_text)
    return
end

-- Send the request to obtain the access token.
success = gAuth:obtain_access_token(tlsSock)
if not success then
    print(gAuth.last_error_text)
    return
end

-- Examine the access token:
print("Access Token: " .. gAuth.access_token)

-- Save our access token to a file.
success = fac:write_entire_text_file("qa_data/tokens/googleTasks.txt", gAuth.access_token, "utf-8", false)