Lua

Okta Client Credentials FLow

See more Okta OAuth/OIDC Examples

The Client Credentials flow is recommended for use in machine-to-machine authentication. Your application will need to securely store its Client ID and Secret and pass those to Okta in exchange for an access token. At a high-level, the flow only has two steps:

• Your application passes its client credentials to your Okta authorization server.
• If the credentials are accurate, Okta responds with an access token.

Note: This example uses "customScope". You'll replace it with whatever scope(s) you've defined for your app. Scopes are defined in your Authorization Server. See Okta Authorization Server / Scopes

Lua

local chilkat = require("chilkat")

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

local http = chilkat.Http.new()

-- Implements the following CURL command:

-- curl --request POST \
--   --url https://{yourOktaDomain}/oauth2/default/v1/token \
--   --header 'accept: application/json' \
--   --user "client_id:client_secret" \
--   --header 'cache-control: no-cache' \
--   --header 'content-type: application/x-www-form-urlencoded' \
--   --data 'grant_type=client_credentials&scope=customScope'

http.login = "client_id"
http.password = "client_secret"

local req = chilkat.HttpRequest.new()
req.http_verb = "POST"
req.path = "/oauth2/default/v1/token"
req.content_type = "application/x-www-form-urlencoded"
req:add_param("grant_type", "client_credentials")
req:add_param("scope", "customScope")

req:add_header("accept", "application/json")

local resp = chilkat.HttpResponse.new()
local success = http:http_req("https://{yourOktaDomain}/oauth2/default/v1/token", req, resp)
if not success then
    print(http.last_error_text)
    return
end

local sbResponseBody = chilkat.StringBuilder.new()
resp:get_body_sb(sbResponseBody)
local jResp = chilkat.JsonObject.new()
jResp:load_sb(sbResponseBody)
jResp.emit_compact = false

print("Response Body:")
print(jResp:emit())

local respStatusCode = resp.status_code
print("Response Status Code = " .. respStatusCode)
if respStatusCode >= 400 then
    print("Response Header:")
    print(resp.header)
    print("Failed.")
    return
end

-- Sample JSON response:
-- (Sample code for parsing the JSON response is shown below)

-- {
--   "access_token": "eyJraWQiO ... B2CnCLj7GRUW3mQ",
--   "token_type": "Bearer",
--   "expires_in": 3600,
--   "scope": "customScope"
-- }

-- Sample code for parsing the JSON response...
-- Use the following online tool to generate parsing code from sample JSON:
-- Generate Parsing Code from JSON

local access_token = jResp:string_of("access_token")
local token_type = jResp:string_of("token_type")
local expires_in = jResp:int_of("expires_in")
local scope = jResp:string_of("scope")