(.NET Core C#) 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

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

Chilkat.Http http = 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.)
Chilkat.Cert cert = new Chilkat.Cert();
bool success = cert.LoadPfxFile("qa_data/pfx/my_ibanity_certificate.pfx","my_pfx_password");
if (success == false) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

success = http.SetSslClientCert(cert);
if (success == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Chilkat.HttpRequest req = 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.
Chilkat.JsonObject jsonToken = new Chilkat.JsonObject();
success = jsonToken.LoadFile("qa_data/tokens/isabel_refresh_token.json");
if (success == false) {
    Debug.WriteLine("No existing access token.");
    return;
}

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");

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();
string idempotencyKey = crypt.GenerateUuid();
Debug.WriteLine("Ibanity-Idempotency-Key: " + idempotencyKey);
req.AddHeader("Ibanity-Idempotency-Key",idempotencyKey);

Chilkat.HttpResponse resp = http.PostUrlEncoded("https://api.ibanity.com/isabel-connect/oauth2/token",req);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
resp.GetBodySb(sbResponseBody);
Chilkat.JsonObject jResp = new Chilkat.JsonObject();
jResp.LoadSb(sbResponseBody);
jResp.EmitCompact = false;

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

int respStatusCode = resp.StatusCode;
Debug.WriteLine("Response Status Code = " + Convert.ToString(respStatusCode));
if (respStatusCode >= 400) {
    Debug.WriteLine("Response Header:");
    Debug.WriteLine(resp.Header);
    Debug.WriteLine("Failed.");

    return;
}

// 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

string token_type = jResp.StringOf("token_type");
string scope = jResp.StringOf("scope");
int expires_in = jResp.IntOf("expires_in");
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");