(Visual FoxPro) Okta Client Credentials FLow

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

For more information, see https://developer.okta.com/docs/guides/implement-client-creds/use-flow/

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loHttp
LOCAL lnSuccess
LOCAL loReq
LOCAL loResp
LOCAL loSbResponseBody
LOCAL loJResp
LOCAL lnRespStatusCode
LOCAL lcAccess_token
LOCAL lcToken_type
LOCAL lnExpires_in
LOCAL lcScope

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

* 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'

loHttp.Login = "client_id"
loHttp.Password = "client_secret"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.HttpRequest')
loReq = CreateObject('Chilkat.HttpRequest')
loReq.HttpVerb = "POST"
loReq.Path = "/oauth2/default/v1/token"
loReq.ContentType = "application/x-www-form-urlencoded"
loReq.AddParam("grant_type","client_credentials")
loReq.AddParam("scope","customScope")

loReq.AddHeader("accept","application/json")

loResp = loHttp.PostUrlEncoded("https://{yourOktaDomain}/oauth2/default/v1/token",loReq)
IF (loHttp.LastMethodSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    RELEASE loReq
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbResponseBody = CreateObject('Chilkat.StringBuilder')
loResp.GetBodySb(loSbResponseBody)
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJResp = CreateObject('Chilkat.JsonObject')
loJResp.LoadSb(loSbResponseBody)
loJResp.EmitCompact = 0

? "Response Body:"
? loJResp.Emit()

lnRespStatusCode = loResp.StatusCode
? "Response Status Code = " + STR(lnRespStatusCode)
IF (lnRespStatusCode >= 400) THEN
    ? "Response Header:"
    ? loResp.Header
    ? "Failed."
    RELEASE loResp
    RELEASE loHttp
    RELEASE loReq
    RELEASE loSbResponseBody
    RELEASE loJResp
    CANCEL
ENDIF

RELEASE loResp

* 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

lcAccess_token = loJResp.StringOf("access_token")
lcToken_type = loJResp.StringOf("token_type")
lnExpires_in = loJResp.IntOf("expires_in")
lcScope = loJResp.StringOf("scope")

RELEASE loHttp
RELEASE loReq
RELEASE loSbResponseBody
RELEASE loJResp