add 网络流量API

app/utils/system.py

@@ -445,6 +445,24 @@ class SystemUtils:
         process_memory_percent = (process_memory / system_memory) * 100
         return [process_memory, int(process_memory_percent)]
 
+    @staticmethod
+    def network_usage() -> List[int]:
+        """
+        获取当前网络流量（上行和下行流量，单位：bytes/s）
+        """
+        import time
+        # 获取初始网络统计
+        net_io_1 = psutil.net_io_counters()
+        time.sleep(1)  # 等待1秒
+        # 获取1秒后的网络统计
+        net_io_2 = psutil.net_io_counters()
+        
+        # 计算1秒内的流量变化
+        upload_speed = net_io_2.bytes_sent - net_io_1.bytes_sent
+        download_speed = net_io_2.bytes_recv - net_io_1.bytes_recv
+        
+        return [upload_speed, download_speed]
+
     @staticmethod
     def is_hardlink(src: Path, dest: Path) -> bool:
         """