C++

Salesforce OAuth2 Access Token

See more OAuth2 Examples

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

#include <CkOAuth2.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  To further clarify, see OAuth 2.0 Authorization Flow

    CkOAuth2 oauth2;

    //  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.
    oauth2.put_ListenPort(3017);

    oauth2.put_AuthorizationEndpoint("https://login.salesforce.com/services/oauth2/authorize");
    oauth2.put_TokenEndpoint("https://login.salesforce.com/services/oauth2/token");

    //  Replace this with your actual client ID (Consumer Key)
    oauth2.put_ClientId("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
    oauth2.put_CodeChallenge(true);
    oauth2.put_CodeChallengeMethod("S256");

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

    //  Begin the OAuth2 authorization flow.  This returns a URL that should be loaded in a browser.
    const char *url = oauth2.startAuth();
    if (oauth2.get_LastMethodSuccess() != true) {
        std::cout << oauth2.lastErrorText() << "\r\n";
        return;
    }

    //  Launch the default browser on the system and navigate to the url.
    //  The LaunchBrowser method was added in Chilkat v10.1.2.
    success = oauth2.LaunchBrowser(url);
    if (success == false) {
        std::cout << oauth2.lastErrorText() << "\r\n";
        return;
    }

    //  Wait for the user to approve or deny authorization in the browser.
    int numMsWaited = 0;
    while ((numMsWaited < 90000) && (oauth2.get_AuthFlowState() < 3)) {
        oauth2.SleepMs(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 (oauth2.get_AuthFlowState() < 3) {
        oauth2.Cancel();
        std::cout << "No response from the browser!" << "\r\n";
        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 (oauth2.get_AuthFlowState() == 5) {
        std::cout << "OAuth2 failed to complete." << "\r\n";
        std::cout << oauth2.failureInfo() << "\r\n";
        return;
    }

    if (oauth2.get_AuthFlowState() == 4) {
        std::cout << "OAuth2 authorization was denied." << "\r\n";
        std::cout << oauth2.accessTokenResponse() << "\r\n";
        return;
    }

    if (oauth2.get_AuthFlowState() != 3) {
        std::cout << "Unexpected AuthFlowState:" << oauth2.get_AuthFlowState() << "\r\n";
        return;
    }

    std::cout << "OAuth2 authorization granted!" << "\r\n";
    std::cout << "Access Token = " << oauth2.accessToken() << "\r\n";

    //  Save the full JSON access token response to a file.
    CkStringBuilder sbJson;
    sbJson.Append(oauth2.accessTokenResponse());
    sbJson.WriteFile("qa_data/tokens/_salesforce.json","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.
    //  
    }