Method onNewConnection

ui-linux/src/oauthservice.cpp:249–340

}

void OAuthService::onNewConnection()
{
    if (!m_server) return;

    QTcpSocket *socket = m_server->nextPendingConnection();
    if (!socket) return;

    // Use QPointer to safely check if objects are still alive
    QPointer<OAuthService> self(this);
    QPointer<QTcpSocket> socketGuard(socket);
    
    // Timeout for incomplete requests
    QTimer::singleShot(30000, this, [self, socketGuard]() {
        if (!self) return;  // OAuthService was destroyed
        if (socketGuard && socketGuard->state() == QAbstractSocket::ConnectedState) {
            socketGuard->disconnectFromHost();
        }
    });

    auto recvBuf = std::make_shared<QByteArray>();
    connect(socket, &QTcpSocket::readyRead, this, [this, socket, recvBuf, self]() {
        if (!self) return;  // OAuthService was destroyed
        
        *recvBuf += socket->readAll();
        if (!recvBuf->contains("\r\n\r\n")) return; // wait for complete request

        // Disconnect signal to prevent re-entry
        disconnect(socket, &QTcpSocket::readyRead, this, nullptr);

        QString request = QString::fromUtf8(*recvBuf);

        // Expected: "GET /callback?code=XXX&state=YYY HTTP/1.1" (Google)
        // Or:       "GET /?code=XXX HTTP/1.1" (OneDrive via rclone)
        int getEnd = request.indexOf(" HTTP/");
        if (getEnd < 0) {
            socket->close();
            socket->deleteLater();
            return;
        }
        QString path = request.mid(4, getEnd - 4);
        qDebug() << "[OAuth] Received request:" << path;

        // Ignore non-callback requests (favicon, preflight, etc.)
        if (!path.startsWith("/callback") && !path.startsWith("/?")) {
            qDebug() << "[OAuth] Ignoring non-callback request";
            socket->write("HTTP/1.1 404 Not Found\r\nConnection: close\r\n\r\n");
            socket->flush();
            socket->close();
            socket->deleteLater();
            return;
        }

        QUrl url("http://localhost" + path);
        QUrlQuery query(url.query());
        QString code = query.queryItemValue("code");
        QString state = query.queryItemValue("state");
        QString error = query.queryItemValue("error");