Dropbox QOauth module issue

[yanmo]

Hi,

I am trying to connect to dropbox usin QOauth Api with Qt 6.5. I do this code:

If i have the line : " (*parameters).remove(QStringLiteral("redirect_uri"));"
it open the browser, I need to accept and I have the code to paste to connect available on the webpage (but not in my application).
If I comment this line, I have the following issue on the web browser :
"
Error (400)
It seems the app you were using submitted a bad request. If you would like to report this error to the app's developer, include the information below.

More details for developers
Invalid redirect_uri. It must exactly match one of the redirect URIs you've pre-configured for your app (including the path)
"

my port match with the one on the dropbox app redirect uri "http://127.0.0.1:56207"
I don't know what to do to succeed to connect to Dropbox API.

m_auth = new QOAuth2AuthorizationCodeFlow(this);

QOAuthHttpServerReplyHandler* replyHandler = new QOAuthHttpServerReplyHandler(56207,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(m_apiKey);
m_auth->setClientIdentifierSharedKey(m_apiSecret);
m_auth->setNetworkAccessManager(new QNetworkAccessManager(this));

m_auth->setModifyParametersFunction([](QAbstractOAuth::Stage stage,  QMultiMap<QString, QVariant>* parameters) {
    if (QOAuth2AuthorizationCodeFlow::Stage::RequestingAuthorization == stage || QOAuth2AuthorizationCodeFlow::Stage::RequestingAccessToken   == stage)
    {
        (*parameters).remove(QStringLiteral("redirect_uri"));
    }
    
});

if(haveValidToken()){
    return;
}

connect(m_auth, &QAbstractOAuth::requestFailed, [=](){
    qDebug()<<"API Key or API Secret or port incorrect";
});

connect(m_auth, &QAbstractOAuth::authorizeWithBrowser, [=](QUrl url) {
    QUrlQuery query(url);
    
    query.addQueryItem("force_reapprove", "true"); // Param required to get data everytime
    query.addQueryItem("token_access_type", "offline"); // Needed for Refresh Token (as AccessToken expires shortly)
    query.addQueryItem("reponse_type","code");
    //  query.addQueryItem("force_reauthentication","false");
    
    url.setQuery(query);
    QDesktopServices::openUrl(url);
    //        m_browser.resize(900, 700);
    //        m_browser.page()->profile()->setPersistentCookiesPolicy(QWebEngineProfile::AllowPersistentCookies);
    //        m_browser.load(url);
});

connect(m_auth, &QAbstractOAuth2::authorizationCallbackReceived,[=](const QVariantMap data)
        {
            if (false == data.isEmpty())
            {
                QString authCode = data.value("code").toString();
                qDebug() << "auth code : " << authCode;
                if(!authCode.isEmpty())
                {
                    QUrl url(m_auth->accessTokenUrl());
                    
                    QUrlQuery queryUrl(url.query());
                    queryUrl.addQueryItem("code",authCode);
                    queryUrl.addQueryItem("grant_type","authorization_code");
                    queryUrl.addQueryItem("client_id",m_apiKey);
                    queryUrl.addQueryItem("client_secret",m_apiSecret);
                    queryUrl.addQueryItem("redirect_uri",m_auth->replyHandler()->callback());
                    url.setQuery(queryUrl);
                    
                    QNetworkRequest request(url);
                    request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded");
                    
                    QNetworkReply *reply =  m_auth->networkAccessManager()->post(request,"");
                    connect(reply, &QNetworkReply::finished,this,&Dropbox::getRefreshToken);
                }
            }
        });

connect(m_auth, &QOAuth2AuthorizationCodeFlow::granted, [=](){
    qDebug() << "token : " << m_auth->token() << " expire at : " << m_auth->expirationAt();
    m_accessToken=m_auth->token();
    m_accessTokenExpireAt=(m_auth->expirationAt().toString("dd MM HH:mm:ss yyyy"));
});
m_auth->grant();

[SGaist]

Hi and welcome to devnet,

Did you check the content of the query url ?
Do you have some mismatch like localhost vs 127.0.0.1 ? While they resolve to the same address they are different from an OAuth point of view.