(Visual Basic 6.0) Isabel Connect Create Access Token given Valid Refresh Token

See more Ibanity Examples

Create (refresh) an access token given a valid refresh token.

For more information, see https://documentation.ibanity.com/isabel-connect/api#create-access-token

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

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

Dim http As New ChilkatHttp

' Implements the following CURL command:

' curl -X POST https://api.ibanity.com/isabel-connect/oauth2/token \
' --cert certificate.pem:qwertyuiop1 \
' --key private_key.pem  \
' -H "Content-Type: application/x-www-form-urlencoded" \
' -H "Accept: application/vnd.api+json" \
' -H "Ibanity-Idempotency-Key: 94c5586e-e15e-4bae-a1fe-fdbefe1f11d3"  \
' -d grant_type=refresh_token \
' -d refresh_token=valid_refresh_token \
' -d client_id=valid_client_id \
' -d client_secret=valid_client_secret

' Ibanity provides the certificate + private key in PFX format.  This example will use the .pfx instead of the pair of PEM files.
' (It is also possible to implement using Chilkat with the PEM files, but PFX is easier.)
Dim cert As New ChilkatCert
Dim success As Long
success = cert.LoadPfxFile("qa_data/pfx/my_ibanity_certificate.pfx","my_pfx_password")
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

success = http.SetSslClientCert(cert)
If (success = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim req As New ChilkatHttpRequest
req.HttpVerb = "POST"
req.Path = "/isabel-connect/oauth2/token"
req.ContentType = "application/x-www-form-urlencoded"
req.AddParam "grant_type","refresh_token"

' Load the previously obtained refresh token.
Dim jsonToken As New ChilkatJsonObject
success = jsonToken.LoadFile("qa_data/tokens/isabel_refresh_token.json")
If (success = 0) Then
    Debug.Print "No existing access token."
    Exit Sub
End If

req.AddParam "refresh_token",jsonToken.StringOf("refresh_token")

' Note: For sandbox testing, we literally want to use the strings
' "valid_client_id", and "valid_client_secret".
' For the live app, you would replace these with actual values.
req.AddParam "client_id","valid_client_id"
req.AddParam "client_secret","valid_client_secret"

req.AddHeader "Accept","application/vnd.api+json"

Dim crypt As New ChilkatCrypt2
Dim idempotencyKey As String
idempotencyKey = crypt.GenerateUuid()
Debug.Print "Ibanity-Idempotency-Key: " & idempotencyKey
req.AddHeader "Ibanity-Idempotency-Key",idempotencyKey

Dim resp As ChilkatHttpResponse
Set resp = http.PostUrlEncoded("https://api.ibanity.com/isabel-connect/oauth2/token",req)
If (http.LastMethodSuccess = 0) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

Dim sbResponseBody As New ChilkatStringBuilder
success = resp.GetBodySb(sbResponseBody)
Dim jResp As New ChilkatJsonObject
success = jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = 0

Debug.Print "Response Body:"
Debug.Print jResp.Emit()

Dim respStatusCode As Long
respStatusCode = resp.StatusCode
Debug.Print "Response Status Code = " & respStatusCode
If (respStatusCode >= 400) Then
    Debug.Print "Response Header:"
    Debug.Print resp.Header
    Debug.Print "Failed."

    Exit Sub
End If

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

' Notice that we don't get a new refresh token.  The original refresh token is used each time we
' want to refresh.  However, we get a new access token.  This access token is to be used in Isabel API calls
' until we need to refresh again.
' {
'   "token_type": "Bearer",
'   "scope": "cloudconnect",
'   "expires_in": 1799,
'   "access_token": "access_token_1603365408"
' }

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

Dim token_type As String
token_type = jResp.StringOf("token_type")
Dim scope As String
scope = jResp.StringOf("scope")
Dim expires_in As Long
expires_in = jResp.IntOf("expires_in")
Dim access_token As String
access_token = jResp.StringOf("access_token")

' Save this to a file so we can load in other examples to include the access token in the HTTP request.
success = jResp.WriteFile("qa_data/tokens/isabel_access_token.json")