(VBScript) 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

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' 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")
set http = 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'

http.Login = "client-id"
http.Password = "client-secret"

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.HttpRequest")
set req = CreateObject("Chilkat.HttpRequest")
req.HttpVerb = "POST"
req.Path = "/gcb/api/clientCredentials/oauth2/token/us/gcb"
req.ContentType = "application/x-www-form-urlencoded"
req.AddParam "grant_type","client_credentials"
req.AddParam "scope","/api"
req.AddHeader "accept","application/json"

' resp is a Chilkat.HttpResponse
Set resp = http.PostUrlEncoded("https://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb",req)
If (http.LastMethodSuccess = 0) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder")
set sbResponseBody = CreateObject("Chilkat.StringBuilder")
success = resp.GetBodySb(sbResponseBody)
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set jResp = CreateObject("Chilkat.JsonObject")
success = jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = 0

outFile.WriteLine("Response Body:")
outFile.WriteLine(jResp.Emit())

respStatusCode = resp.StatusCode
outFile.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    outFile.WriteLine("Response Header:")
    outFile.WriteLine(resp.Header)
    outFile.WriteLine("Failed.")

    WScript.Quit
End If

success = jResp.WriteFile("qa_data/tokens/citi_client_credentials.json")
If (success = 0) Then
    outFile.WriteLine("Failed to save JSON access token file.")
    WScript.Quit
End If

'  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

token_type = jResp.StringOf("token_type")
access_token = jResp.StringOf("access_token")
expires_in = jResp.IntOf("expires_in")
consented_on = jResp.IntOf("consented_on")
scope = jResp.StringOf("scope")

outFile.Close