Unicode C

Salesforce OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get a Salesforce OAuth2 access token from a desktop application or script. Unicode C

#include <C_CkOAuth2W.h>
#include <C_CkStringBuilderW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkOAuth2W oauth2;
    const wchar_t *url;
    int numMsWaited;
    HCkStringBuilderW sbJson;

    success = FALSE;

    //  To further clarify, see OAuth 2.0 Authorization Flow

    oauth2 = CkOAuth2W_Create();

    //  This should be the port in the localhost callback URL for your connected app.  
    //  The callback URL would look like "http://localhost:3017/" if the port number is 3017.
    CkOAuth2W_putListenPort(oauth2,3017);

    CkOAuth2W_putAuthorizationEndpoint(oauth2,L"https://login.salesforce.com/services/oauth2/authorize");
    CkOAuth2W_putTokenEndpoint(oauth2,L"https://login.salesforce.com/services/oauth2/token");

    //  Replace this with your actual client ID (Consumer Key)
    CkOAuth2W_putClientId(oauth2,L"CLIENT_ID");

    //  We don't have to include the client secret.
    //  See the screenshot of our Connected App below..

    //  This is for Require Proof Key for Code Exchange (PKCE)
    //  See OAuth2 PKCE Explained
    CkOAuth2W_putCodeChallenge(oauth2,TRUE);
    CkOAuth2W_putCodeChallengeMethod(oauth2,L"S256");

    //  To force the OAuth consent screen to reappear (even if previously granted), use:
    CkOAuth2W_AddAuthQueryParam(oauth2,L"prompt",L"consent");

    //  Begin the OAuth2 authorization 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;
    }

    //  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));

    //  Save the full JSON access token response to a file.
    sbJson = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbJson,CkOAuth2W_accessTokenResponse(oauth2));
    CkStringBuilderW_WriteFile(sbJson,L"qa_data/tokens/_salesforce.json",L"utf-8",FALSE);

    //  The saved JSON response looks like this:

    //  {
    //    "access_token": "00D41000....uLZBpT6",
    //    "refresh_token": "5Aep....25xdGgkrV",
    //    "signature": "cjTbSc5DvcKpaMoRTzuQTJLb1tcMw8LEO01flq4aMD4=",
    //    "scope": "refresh_token id",
    //    "instance_url": "https://d41000000f8a0eak-dev-ed.my.salesforce.com",
    //    "id": "https://login.salesforce.com/id/00D41000000F8A0EAK/005410000....xAAE",
    //    "token_type": "Bearer",
    //    "issued_at": "1738348388166"
    //  }

    //  --------------------------------------------------------------------------
    //  Here's a screenshot of a Salesforce Connected App 
    //  with the correct Callback URL for this example,
    //  and also selects "Require Proof Key for Code Exchange (PKCE)"
    //  and does not requires the secret for the authorization or refresh flow,
    //  and also allows for the Client Credentials flow.
    //  


    CkOAuth2W_Dispose(oauth2);
    CkStringBuilderW_Dispose(sbJson);

    }