(Visual FoxPro) citi Developer OAuth2 Client Credentials Grant

Get access token for your application credentials. You can use this for citi APIs which do not require customer credential verification and consent (e.g. Onboarding).

For more information, see https://sandbox.developerhub.citi.com/api/united-states/retail-bank/identity-security/authorize/documentation

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 lcToken_type
LOCAL lcAccess_token
LOCAL lnExpires_in
LOCAL lnConsented_on
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://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb \
*   --header 'accept: application/json' \
*   --user client-id:client-secret \
*   --header 'content-type: application/x-www-form-urlencoded' \
*   --data 'grant_type=client_credentials&scope=%2Fapi'

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 = "/gcb/api/clientCredentials/oauth2/token/us/gcb"
loReq.ContentType = "application/x-www-form-urlencoded"
loReq.AddParam("grant_type","client_credentials")
loReq.AddParam("scope","/api")
loReq.AddHeader("accept","application/json")

loResp = loHttp.PostUrlEncoded("https://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb",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

lnSuccess = loJResp.WriteFile("qa_data/tokens/citi_client_credentials.json")
IF (lnSuccess = 0) THEN
    ? "Failed to save JSON access token file."
    RELEASE loHttp
    RELEASE loReq
    RELEASE loSbResponseBody
    RELEASE loJResp
    CANCEL
ENDIF

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

*  {
*    "token_type": "bearer",
*    "access_token": "AAIkMjdh ... 3fsWb7zJ0s",
*    "expires_in": 1800,
*    "consented_on": 1584817860,
*    "scope": "/api"
*  }

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

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

RELEASE loHttp
RELEASE loReq
RELEASE loSbResponseBody
RELEASE loJResp