(VB.NET) Isabel Connect Create Access Token given Valid Refresh Token

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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 .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim http As New Chilkat.Http

' 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 Chilkat.Cert
Dim success As Boolean = cert.LoadPfxFile("qa_data/pfx/my_ibanity_certificate.pfx","my_pfx_password")
If (success = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If

success = http.SetSslClientCert(cert)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim req As New Chilkat.HttpRequest
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 Chilkat.JsonObject
success = jsonToken.LoadFile("qa_data/tokens/isabel_refresh_token.json")
If (success = False) Then
    Debug.WriteLine("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 Chilkat.Crypt2
Dim idempotencyKey As String = crypt.GenerateUuid()
Debug.WriteLine("Ibanity-Idempotency-Key: " & idempotencyKey)
req.AddHeader("Ibanity-Idempotency-Key",idempotencyKey)

Dim resp As Chilkat.HttpResponse = http.PostUrlEncoded("https://api.ibanity.com/isabel-connect/oauth2/token",req)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim sbResponseBody As New Chilkat.StringBuilder
resp.GetBodySb(sbResponseBody)
Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

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

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(resp.Header)
    Debug.WriteLine("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 = jResp.StringOf("token_type")
Dim scope As String = jResp.StringOf("scope")
Dim expires_in As Integer = jResp.IntOf("expires_in")
Dim access_token As String = 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")