Function GenerateTimestampString

Modules/RESTAPI/src/mitkDataStorageBridge.cpp:135–163

  }

  std::string GenerateTimestampString()
  {
    auto now = std::chrono::system_clock::now();

    // Split into seconds + fractional part
    auto seconds = std::chrono::time_point_cast<std::chrono::seconds>(now);
    auto fraction = now - seconds;
    auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(fraction).count();

    std::time_t t = std::chrono::system_clock::to_time_t(seconds);

    std::tm tm{};
#if defined(_WIN32)
    gmtime_s(&tm, &t);   // Windows thread-safe
#else
    gmtime_r(&t, &tm);   // POSIX thread-safe
#endif

    std::ostringstream oss;
    oss << std::put_time(&tm, "%Y-%m-%dT%H:%M:%S");

    // Append fractional seconds
    oss << "." << std::setw(3) << std::setfill('0') << millis;

    // UTC marker
    oss << "Z";

    return oss.str();
  }

  /**
   * @brief Mark a node as modified via REST API.