Log in with access token

[Sarah_modulo]

I try to access DropBox account in my app. I use QOAuth2AuthorizationCodeFlow.
I have no problem to do it with authorizeWithBrowser but a webpage open everytime I launch my app and asked for authorization. I would like to use credentials once and after connect to DropBox using Access Token and Refresh Token.
But I don't understand how it's working !

Here my code :

m_auth = new QOAuth2AuthorizationCodeFlow(this);


    QOAuthHttpServerReplyHandler* replyHandler = new QOAuthHttpServerReplyHandler(portCallback,this);
    m_auth->setReplyHandler(replyHandler);

    m_auth->setAuthorizationUrl(QUrl("https://www.dropbox.com/oauth2/authorize"));
    m_auth->setAccessTokenUrl(QUrl("https://api.dropboxapi.com/oauth2/token"));
    m_auth->setClientIdentifier(apiKey);
    m_auth->setClientIdentifierSharedKey(apiSecret);
    m_auth->setNetworkAccessManager(new QNetworkAccessManager(this));

    connect(m_auth, &QAbstractOAuth2::authorizeWithBrowser, [=](QUrl url) {
        QUrlQuery query(url);

        query.addQueryItem("force_reapprove", "false"); 
        query.addQueryItem("token_access_type", "offline"); 
        query.addQueryItem("response_type", "code");

        url.setQuery(query);
        QDesktopServices::openUrl(url);
    });

    connect(m_auth, &QAbstractOAuth::granted, [=](){
        m_isConnected=true;
        m_deviceData->setConnected(true);
        qDebug() << "token : " << m_auth->token() << " expire at : " << m_auth->expirationAt();
        //Can I save it here ? Why should I go through autorizationCallbackReceived ?
    });

    connect(m_auth, &QAbstractOAuth2::authorizationCallbackReceived,[=](const QVariantMap data)
    {
        if (false == data.isEmpty())
        {
            QString authCode = data.value("code").toString();
            if(!authCode.isEmpty())
            {
// What do I need to do here ?
            }
        }
    });

    m_auth->grant();

I suppose I need to check/set my access token instead of asked for grant(); Or should I ask for grant in every case but then how the program know that it didn't need to go through all the authorization process ?

Plus, this is for Access Token but I will need a Refresh Token to reload my Access Token (If I get it right...). So how do I get my refresh token and how do I use it ?

I hope I'm clear about where I'm lost. I read a lot of document/exemple but they never explain the all mechanism...

I thanks for any help.

[Pl45m4]

@Sarah_modulo

Hi,

so you want to login once with your account and then use the token to authenticate until you log out?!

There is this post on StackOverflow

• https://stackoverflow.com/questions/46907896/google-oauth-2-0-refresh-token-persistence-qt

where this libary is recommended. Seems to work for OP
(if you read the manual on GitHub, there is a section, how to store the token persistently for later use)

• https://github.com/pipacs/o2

Unfortunately I dont know exacly whether it's possible using QAuth only and if so, how.

Hope, it helps :)

[Sarah_modulo]

Thanks but I don't want to import any library.
I will check if i understand it better in the code of this library, but for know it's still very confusing.