Method exchangeCodeForTokens

ui-linux/src/oauthservice.cpp:342–470

}

void OAuthService::exchangeCodeForTokens(const QString &code, int retryCount)
{
    auto *nam = new QNetworkAccessManager(this);
    QPointer<OAuthService> self(this);

    QUrl tokenUrl;
    QUrlQuery body;

    if (m_provider == "gdrive") {
        tokenUrl.setUrl(GDRIVE_TOKEN_URL);
        body.addQueryItem("code", code);
        body.addQueryItem("client_id", GDRIVE_CLIENT_ID);
        body.addQueryItem("client_secret", GDRIVE_CLIENT_SECRET);
        body.addQueryItem("redirect_uri", m_redirectUri);
        body.addQueryItem("grant_type", "authorization_code");
        body.addQueryItem("code_verifier", m_codeVerifier);
    } else if (m_provider == "onedrive") {
        tokenUrl.setUrl(ONEDRIVE_TOKEN_URL);
        body.addQueryItem("code", code);
        body.addQueryItem("client_id", ONEDRIVE_CLIENT_ID);
        body.addQueryItem("client_secret", ONEDRIVE_CLIENT_SECRET);
        body.addQueryItem("redirect_uri", m_redirectUri);
        body.addQueryItem("grant_type", "authorization_code");
        body.addQueryItem("scope", ONEDRIVE_SCOPE);
        body.addQueryItem("code_verifier", m_codeVerifier);
    }

    QNetworkRequest req(tokenUrl);
    req.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");

    QNetworkReply *reply = nam->post(req, body.toString(QUrl::FullyEncoded).replace("%20", "+").toUtf8());

    connect(reply, &QNetworkReply::finished, this, [this, self, reply, nam, code, retryCount]() {
        reply->setParent(nullptr);
        reply->deleteLater();
        nam->deleteLater();

        if (!self) return;

        if (reply->error() != QNetworkReply::NoError) {
            // Retry once -- broken IPv6 fails instantly, retry gives IPv4 a chance
            if (retryCount < 2) {
                qDebug() << "[OAuth] Token exchange failed, retrying:" << reply->errorString();
                emit statusMessage("Retrying token exchange...");
                QTimer::singleShot(500, this, [this, code, retryCount]() {
                    exchangeCodeForTokens(code, retryCount + 1);
                });
                return;
            }
            emit authFailed(m_provider, "Token exchange failed: " + reply->errorString());
            cancel();
            return;
        }

        QByteArray responseData = reply->readAll();
        QJsonDocument doc = QJsonDocument::fromJson(responseData);
        if (!doc.isObject()) {
            emit authFailed(m_provider, "Invalid token response");