(C) Isabel Connect Create First Access Token and Refresh Token

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Note: This example requires Chilkat v11.0.0 or greater.

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

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#include <C_CkHttp.h>
#include <C_CkCert.h>
#include <C_CkHttpRequest.h>
#include <C_CkCrypt2.h>
#include <C_CkHttpResponse.h>
#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    HCkCert cert;
    HCkHttpRequest req;
    HCkCrypt2 crypt;
    const char *idempotencyKey;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    const char *token_type;
    const char *scope;
    const char *refresh_token;
    int expires_in;
    const char *access_token;

    success = FALSE;

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

    http = CkHttp_Create();

    // 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: af621a8f-f74b-41a2-b011-336997633df4"  \
    // -d grant_type=authorization_code \
    // -d code=valid_authorization_code \
    // -d client_id=valid_client_id \
    // -d client_secret=valid_client_secret \
    // -d redirect_uri=https://fake-tpp.com 

    // 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.)
    cert = CkCert_Create();
    success = CkCert_LoadPfxFile(cert,"qa_data/pfx/my_ibanity_certificate.pfx","my_pfx_password");
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkHttp_Dispose(http);
        CkCert_Dispose(cert);
        return;
    }

    success = CkHttp_SetSslClientCert(http,cert);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkCert_Dispose(cert);
        return;
    }

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putPath(req,"/isabel-connect/oauth2/token");
    CkHttpRequest_putContentType(req,"application/x-www-form-urlencoded");
    CkHttpRequest_AddParam(req,"grant_type","authorization_code");

    // Note: For sandbox testing, we literally want to use the strings
    // "valid_authorization_code", "valid_client_id", and "valid_client_secret".
    // For the live app, you would replace these with actual values.
    CkHttpRequest_AddParam(req,"code","valid_authorization_code");
    CkHttpRequest_AddParam(req,"client_id","valid_client_id");
    CkHttpRequest_AddParam(req,"client_secret","valid_client_secret");
    CkHttpRequest_AddParam(req,"redirect_uri","https://fake-tpp.com");

    CkHttpRequest_AddHeader(req,"Accept","application/vnd.api+json");

    crypt = CkCrypt2_Create();
    idempotencyKey = CkCrypt2_generateUuid(crypt);
    printf("Ibanity-Idempotency-Key: %s\n",idempotencyKey);
    CkHttpRequest_AddHeader(req,"Ibanity-Idempotency-Key",idempotencyKey);

    resp = CkHttpResponse_Create();
    success = CkHttp_HttpReq(http,"https://api.ibanity.com/isabel-connect/oauth2/token",req,resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkCert_Dispose(cert);
        CkHttpRequest_Dispose(req);
        CkCrypt2_Dispose(crypt);
        CkHttpResponse_Dispose(resp);
        return;
    }

    sbResponseBody = CkStringBuilder_Create();
    CkHttpResponse_GetBodySb(resp,sbResponseBody);
    jResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jResp,sbResponseBody);
    CkJsonObject_putEmitCompact(jResp,FALSE);

    printf("Response Body:\n");
    printf("%s\n",CkJsonObject_emit(jResp));

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
        CkHttp_Dispose(http);
        CkCert_Dispose(cert);
        CkHttpRequest_Dispose(req);
        CkCrypt2_Dispose(crypt);
        CkHttpResponse_Dispose(resp);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

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

    // {
    //   "token_type": "Bearer",
    //   "scope": "cloudconnect",
    //   "refresh_token": "valid_refresh_token",
    //   "expires_in": 1799,
    //   "access_token": "access_token_1617371230"
    // }

    // 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 = CkJsonObject_stringOf(jResp,"token_type");
    scope = CkJsonObject_stringOf(jResp,"scope");
    refresh_token = CkJsonObject_stringOf(jResp,"refresh_token");
    expires_in = CkJsonObject_IntOf(jResp,"expires_in");
    access_token = CkJsonObject_stringOf(jResp,"access_token");

    // Save to a file for future use in refreshing the access token.
    // The refresh token is the same each time we refresh to get a new access token.
    success = CkJsonObject_WriteFile(jResp,"qa_data/tokens/isabel_refresh_token.json");

    // Also save to a file to be used as the current access token.
    success = CkJsonObject_WriteFile(jResp,"qa_data/tokens/isabel_access_token.json");


    CkHttp_Dispose(http);
    CkCert_Dispose(cert);
    CkHttpRequest_Dispose(req);
    CkCrypt2_Dispose(crypt);
    CkHttpResponse_Dispose(resp);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }