Unicode C++

SharePoint Rest API using OAuth

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for the SharePoint REST API. Unicode C++

#include <CkOAuth2W.h>

void ChilkatSample(void)
    {
    bool success = false;

    // To further clarify, see OAuth 2.0 Authorization Flow

    CkOAuth2W oauth2;

    // The ListenPort should match the port in your localhost Reply URL of your Azure AD app.
    // Your Reply URL must be exactly "http://localhost:LISTEN_PORT/"
    //    * Do not use "https"
    //    * Make sure the ending "/" is included.
    //    * You may choose any port number that doesn't collide with anything else.
    oauth2.put_ListenPort(3017);

    oauth2.put_AuthorizationEndpoint(L"https://login.microsoftonline.com/TENANT_ID/oauth2/authorize");
    oauth2.put_TokenEndpoint(L"https://login.windows.net/TENANT_ID/oauth2/token?api-version=1.0");

    // Replace these with actual values.
    // Use the application ID
    oauth2.put_ClientId(L"CLIENT_ID");
    // Use the password
    oauth2.put_ClientSecret(L"CLIENT_SECRET");

    oauth2.put_CodeChallenge(false);

    oauth2.put_Scope(L"openid");
    oauth2.put_Resource(L"https://graph.microsoft.com/");

    oauth2.put_IncludeNonce(true);
    oauth2.put_ResponseMode(L"form_post");
    oauth2.put_ResponseType(L"id_token+code");

    // 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() == false) {
        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());
    }