Don't access this before alive check

    void read(const std::shared_ptr<Session> &session) {

      session->connection->set_timeout(config.timeout_request);

      asio::async_read_until(*session->connection->socket, session->request->streambuf, "\r\n\r\n", [this, session](const error_code &ec, std::size_t bytes_transferred) {

        session->connection->set_timeout(config.timeout_content);

        auto lock = session->connection->handler_runner->continue_lock();

        if(!lock)

          return;

        session->request->header_read_time = std::chrono::system_clock::now();

        if(!ec) {

          session->connection->set_timeout(this->config.timeout_content);

          // request->streambuf.size() is not necessarily the same as bytes_transferred, from Boost-docs:

          // "After a successful async_read_until operation, the streambuf may contain additional data beyond the delimiter"

          // The chosen solution is to extract lines from the stream directly when parsing the header. What is left of the