C

Rabobank OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get an OAuth 2.0 access token to access Rabobank API's

Important: This example is for desktop apps only. (It is not for web-based applications.)

Your app defined in the Rabobank portal should look something like this. (Our test app is named "chilkat". You should name your app something else.)

C

#include <C_CkOAuth2.h>
#include <C_CkJsonObject.h>
#include <C_CkFileAccess.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkOAuth2 oauth2;
    const char *url;
    int numMsWaited;
    HCkJsonObject json;
    HCkFileAccess fac;

    success = FALSE;

    //  For more information about the OAuth2, see OAuth 2.0 Authorization Flow

    oauth2 = CkOAuth2_Create();

    //  This should be the port in the localhost callback URL for your app.  
    //  The callback URL would look like "http://localhost:3017/" if the port number is 3017.
    CkOAuth2_putListenPort(oauth2,3017);

    //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
    //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
    //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
    //  IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.

    //  See also https://developer.rabobank.nl/faq

    CkOAuth2_putAuthorizationEndpoint(oauth2,"https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/authorize");
    CkOAuth2_putTokenEndpoint(oauth2,"https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/token");

    //  Replace these with actual values.
    CkOAuth2_putClientId(oauth2,"YOUR_APP_CLIENT_ID");
    //  This is your app password:
    CkOAuth2_putClientSecret(oauth2,"YOUR_APP_CLIENT_SECRET");

    CkOAuth2_putCodeChallenge(oauth2,FALSE);
    //  Provide a SPACE separated list of scopes, as defined in the Rabobank API documentation, 
    //  such as at https://developer-sandbox.rabobank.nl/reference/accounts-ais-sb/3-0-8

    //  Important: To get a refresh token in the final response, you have to ask for "offline_access" scope
    CkOAuth2_putScope(oauth2,"ais.balances.read ais.transactions.read-90days ais.transactions.read-history");

    //  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
    url = CkOAuth2_startAuth(oauth2);
    if (CkOAuth2_getLastMethodSuccess(oauth2) != TRUE) {
        printf("%s\n",CkOAuth2_lastErrorText(oauth2));
        CkOAuth2_Dispose(oauth2);
        return;
    }

    printf("url = %s\n",url);

    //  Launch the default browser on the system and navigate to the url.
    //  The LaunchBrowser method was added in Chilkat v10.1.2.
    success = CkOAuth2_LaunchBrowser(oauth2,url);
    if (success == FALSE) {
        printf("%s\n",CkOAuth2_lastErrorText(oauth2));
        CkOAuth2_Dispose(oauth2);
        return;
    }

    //  Wait for the user to approve or deny authorization in the browser.
    numMsWaited = 0;
    while ((numMsWaited < 90000) && (CkOAuth2_getAuthFlowState(oauth2) < 3)) {
        CkOAuth2_SleepMs(oauth2,100);
        numMsWaited = numMsWaited + 100;
    }

    //  If the browser does not respond within the specified time, AuthFlowState will be:
    //  
    //  1: Waiting for Redirect - The OAuth2 background thread is waiting for the browser's redirect request.
    //  2: Waiting for Final Response - The thread is awaiting the final access token response.
    //  In either case, cancel the background task initiated by StartAuth.

    if (CkOAuth2_getAuthFlowState(oauth2) < 3) {
        CkOAuth2_Cancel(oauth2);
        printf("No response from the browser!\n");
        CkOAuth2_Dispose(oauth2);
        return;
    }

    //  Check AuthFlowState to determine if authorization was granted, denied, or failed:
    //  
    //  3: Success - OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
    //  4: Access Denied - OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
    //  5: Failure - OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

    if (CkOAuth2_getAuthFlowState(oauth2) == 5) {
        printf("OAuth2 failed to complete.\n");
        printf("%s\n",CkOAuth2_failureInfo(oauth2));
        CkOAuth2_Dispose(oauth2);
        return;
    }

    if (CkOAuth2_getAuthFlowState(oauth2) == 4) {
        printf("OAuth2 authorization was denied.\n");
        printf("%s\n",CkOAuth2_accessTokenResponse(oauth2));
        CkOAuth2_Dispose(oauth2);
        return;
    }

    if (CkOAuth2_getAuthFlowState(oauth2) != 3) {
        printf("Unexpected AuthFlowState:%d\n",CkOAuth2_getAuthFlowState(oauth2));
        CkOAuth2_Dispose(oauth2);
        return;
    }

    printf("OAuth2 authorization granted!\n");
    printf("Access Token = %s\n",CkOAuth2_accessToken(oauth2));

    //  Get the full JSON response:
    json = CkJsonObject_Create();
    CkJsonObject_Load(json,CkOAuth2_accessTokenResponse(oauth2));
    CkJsonObject_putEmitCompact(json,FALSE);

    //  The JSON response looks like this:

    //  {
    //    "token_type": "Bearer",
    //    "access_token": "AAIkYTU0ZWM ... sxE0KL0HHWw",
    //    "expires_in": 3600,
    //    "consented_on": 1584641121,
    //    "scope": "ais.balances.read ais.transactions.read-90days ais.transactions.read-history",
    //    "refresh_token": "AAJXXSdN ... Uiblz9ILkxNBlytRGA",
    //    "refresh_token_expires_in": 157784760,
    //    "expires_on": "1584644722"
    //  }

    printf("%s\n",CkJsonObject_emit(json));

    //  Save the JSON to a file to be used in future requests.
    fac = CkFileAccess_Create();
    CkFileAccess_WriteEntireTextFile(fac,"qa_data/tokens/rabobank.json",CkJsonObject_emit(json),"utf-8",FALSE);


    CkOAuth2_Dispose(oauth2);
    CkJsonObject_Dispose(json);
    CkFileAccess_Dispose(fac);

    }