Unicode 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.)

Unicode C

#include <C_CkOAuth2W.h>
#include <C_CkJsonObjectW.h>
#include <C_CkFileAccessW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkOAuth2W oauth2;
    const wchar_t *url;
    int numMsWaited;
    HCkJsonObjectW json;
    HCkFileAccessW fac;

    success = FALSE;

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

    oauth2 = CkOAuth2W_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.
    CkOAuth2W_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

    CkOAuth2W_putAuthorizationEndpoint(oauth2,L"https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/authorize");
    CkOAuth2W_putTokenEndpoint(oauth2,L"https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/token");

    // Replace these with actual values.
    CkOAuth2W_putClientId(oauth2,L"YOUR_APP_CLIENT_ID");
    // This is your app password:
    CkOAuth2W_putClientSecret(oauth2,L"YOUR_APP_CLIENT_SECRET");

    CkOAuth2W_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
    CkOAuth2W_putScope(oauth2,L"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 = CkOAuth2W_startAuth(oauth2);
    if (CkOAuth2W_getLastMethodSuccess(oauth2) != TRUE) {
        wprintf(L"%s\n",CkOAuth2W_lastErrorText(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    wprintf(L"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 = CkOAuth2W_LaunchBrowser(oauth2,url);
    if (success == FALSE) {
        wprintf(L"%s\n",CkOAuth2W_lastErrorText(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    // Wait for the user to approve or deny authorization in the browser.
    numMsWaited = 0;
    while ((numMsWaited < 90000) && (CkOAuth2W_getAuthFlowState(oauth2) < 3)) {
        CkOAuth2W_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 (CkOAuth2W_getAuthFlowState(oauth2) < 3) {
        CkOAuth2W_Cancel(oauth2);
        wprintf(L"No response from the browser!\n");
        CkOAuth2W_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 (CkOAuth2W_getAuthFlowState(oauth2) == 5) {
        wprintf(L"OAuth2 failed to complete.\n");
        wprintf(L"%s\n",CkOAuth2W_failureInfo(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    if (CkOAuth2W_getAuthFlowState(oauth2) == 4) {
        wprintf(L"OAuth2 authorization was denied.\n");
        wprintf(L"%s\n",CkOAuth2W_accessTokenResponse(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    if (CkOAuth2W_getAuthFlowState(oauth2) != 3) {
        wprintf(L"Unexpected AuthFlowState:%d\n",CkOAuth2W_getAuthFlowState(oauth2));
        CkOAuth2W_Dispose(oauth2);
        return;
    }

    wprintf(L"OAuth2 authorization granted!\n");
    wprintf(L"Access Token = %s\n",CkOAuth2W_accessToken(oauth2));

    // Get the full JSON response:
    json = CkJsonObjectW_Create();
    CkJsonObjectW_Load(json,CkOAuth2W_accessTokenResponse(oauth2));
    CkJsonObjectW_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"
    // }

    wprintf(L"%s\n",CkJsonObjectW_emit(json));

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


    CkOAuth2W_Dispose(oauth2);
    CkJsonObjectW_Dispose(json);
    CkFileAccessW_Dispose(fac);

    }