Unicode C++

Vonage UC Extend OAuth2

See more OAuth2 Examples

Get an OAuth2 access token for a desktop application for Vonage. Unicode C++

#include <CkOAuth2W.h>
#include <CkJsonObjectW.h>
#include <CkFileAccessW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkOAuth2W oauth2;

    //  This should be the port in the localhost callback URL for your app.  
    //  The callback URL would look like "http://localhost:3800/" if the port number is 3017.
    oauth2.put_ListenPort(3800);

    oauth2.put_AuthorizationEndpoint(L"https://api.vonage.com/authorize");
    oauth2.put_TokenEndpoint(L"https://api.vonage.com/token");

    //  Replace these with actual values.
    oauth2.put_ClientId(L"CLIENT_ID");
    oauth2.put_ClientSecret(L"CLIENT_SECRET");
    oauth2.put_CodeChallenge(false);

    oauth2.put_Scope(L"openid");

    //  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
    const wchar_t *url = oauth2.startAuth();
    if (oauth2.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",oauth2.lastErrorText());
        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 = oauth2.LaunchBrowser(url);
    if (success == false) {
        wprintf(L"%s\n",oauth2.lastErrorText());
        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();
        wprintf(L"No response from the browser!\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) {
        wprintf(L"OAuth2 failed to complete.\n");
        wprintf(L"%s\n",oauth2.failureInfo());
        return;
    }

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

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

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

    //  Get the full JSON response:
    CkJsonObjectW json;
    json.Load(oauth2.accessTokenResponse());
    json.put_EmitCompact(false);
    wprintf(L"%s\n",json.emit());

    //  The JSON response looks like this:

    //  {
    //    "access_token": "XXXXXXXX-XXX-XXXX-XXXX-XXXXXXXXXXXX",
    //    "refresh_token": "XXXXXXXX-XXX-XXXX-XXXX-XXXXXXXXXXXX",
    //    "scope": "openid",
    //    "id_token": "eyJ4NXQiOiJNem ... hA9tbDCiQRhdI4T0",
    //    "token_type": "Bearer",
    //    "expires_in": 3600
    //  }

    //  Save the JSON to a file for future requests.
    CkFileAccessW fac;
    fac.WriteEntireTextFile(L"qa_data/tokens/vonage_uc_extend.json",json.emit(),L"utf-8",false);
    }