流量监控

.idea/AI-powered-switches.iml

@@ -2,7 +2,7 @@
 <module type="PYTHON_MODULE" version="4">
   <component name="FacetManager">
     <facet type="Python" name="Python facet">
-      <configuration sdkName="Python 3.13" />
+      <configuration sdkName="Python 3.12 (AI-powered-switches)" />
     </facet>
   </component>
   <component name="NewModuleRootManager">
@@ -11,5 +11,6 @@
     </content>
     <orderEntry type="jdk" jdkName="Python 3.13" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Python 3.12 (AI-powered-switches) interpreter library" level="application" />
   </component>
 </module>

src/backend/app/__init__.py

@@ -4,13 +4,8 @@ from starlette.middleware import Middleware  # 新增导入
 from src.backend.app.api.endpoints import router
 from src.backend.app.utils.logger import setup_logging
 from src.backend.config import settings
-from .services.switch_traffic_monitor import get_switch_monitor
-from .services.traffic_monitor import traffic_monitor
-from src.backend.app.api.database import init_db
 
 def create_app() -> FastAPI:
-    init_db()
-    traffic_monitor.start_monitoring()
     setup_logging()
 
     app = FastAPI(

src/backend/app/api/database.py

@@ -1,16 +0,0 @@
-from sqlalchemy import create_engine
-from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy.orm import sessionmaker
-
-SQLALCHEMY_DATABASE_URL = "sqlite:///./traffic_monitor.db"
-
-engine = create_engine(
-    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
-)
-SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
-
-Base = declarative_base()
-
-def init_db():
-    """初始化数据库"""
-    Base.metadata.create_all(bind=engine)

src/backend/app/api/endpoints.py

@@ -1,26 +1,20 @@
 import socket
-from datetime import datetime, timedelta
-from fastapi import (APIRouter, HTTPException, Response, WebSocket, WebSocketDisconnect)
-from typing import List
+from fastapi import (APIRouter, HTTPException, Response)
+from typing import List, Optional
 from pydantic import BaseModel
 import asyncio
-from fastapi.responses import HTMLResponse, JSONResponse
-import matplotlib.pyplot as plt
-import io
-import base64
 import psutil
 import ipaddress
+import time
+from datetime import datetime
 
-from ..models.requests import CLICommandRequest, ConfigRequest
-from ..services.switch_traffic_monitor import get_switch_monitor
-from ..utils import logger
+from ..models.requests import CLICommandRequest, ConfigRequest, TrafficQueryRequest
 from ...app.services.ai_services import AIService
 from ...app.api.network_config import SwitchConfigurator
 from ...config import settings
 from ..services.network_scanner import NetworkScanner
-from ...app.services.traffic_monitor import traffic_monitor
-from ...app.models.traffic_models import TrafficRecord, SwitchTrafficRecord
-from src.backend.app.api.database import SessionLocal
+from ..services.traffic_monitor import traffic_monitor
+from ..utils.logger import logger
 
 router = APIRouter(prefix="", tags=["API"])
 scanner = NetworkScanner()
@@ -38,8 +32,8 @@ async def root():
             "/scan_network",
             "/list_devices",
             "/batch_apply_config",
-            "/traffic/switch/current",
-            "/traffic/switch/history"
+            "/traffic/realtime",
+            "/traffic/cache/clear"
         ]
     }
 
@@ -151,234 +145,6 @@ async def execute_cli_commands(request: CLICommandRequest):
     except Exception as e:
         raise HTTPException(500, detail=str(e))
 
-
-@router.get("/traffic/interfaces", summary="获取所有网络接口")
-async def get_network_interfaces():
-    return {
-        "interfaces": await asyncio.to_thread(traffic_monitor.get_interfaces)
-    }
-
-
-@router.get("/traffic/current", summary="获取当前流量数据")
-async def get_current_traffic(interface: str = None):
-    return await asyncio.to_thread(traffic_monitor.get_current_traffic, interface)
-
-
-@router.get("/traffic/history", summary="获取流量历史数据")
-async def get_traffic_history(interface: str = None, limit: int = 100):
-    history = await asyncio.to_thread(traffic_monitor.get_traffic_history, interface)
-    return {
-        "sent": history["sent"][-limit:],
-        "recv": history["recv"][-limit:],
-        "time": [t.isoformat() for t in history["time"]][-limit:]
-    }
-
-
-@router.get("/traffic/records", summary="获取流量记录")
-async def get_traffic_records(interface: str = None, limit: int = 100):
-    def sync_get_records():
-        with SessionLocal() as session:
-            query = session.query(TrafficRecord)
-            if interface:
-                query = query.filter(TrafficRecord.interface == interface)
-            records = query.order_by(TrafficRecord.timestamp.desc()).limit(limit).all()
-            return [record.to_dict() for record in records]
-
-    return await asyncio.to_thread(sync_get_records)
-
-
-@router.websocket("/ws/traffic")
-async def websocket_traffic(websocket: WebSocket):
-    await websocket.accept()
-    try:
-        while True:
-            traffic_data = await asyncio.to_thread(traffic_monitor.get_current_traffic)
-            await websocket.send_json(traffic_data)
-            await asyncio.sleep(1)
-    except WebSocketDisconnect:
-        print("客户端断开连接")
-
-
-@router.get("/traffic/switch/interfaces", summary="获取交换机的网络接口")
-async def get_switch_interfaces(switch_ip: str):
-    try:
-        monitor = get_switch_monitor(switch_ip)
-        interfaces = list(monitor.interface_oids.keys())
-        return {
-            "switch_ip": switch_ip,
-            "interfaces": interfaces
-        }
-    except Exception as e:
-        logger.error(f"获取交换机接口失败: {str(e)}")
-        raise HTTPException(500, f"获取接口失败: {str(e)}")
-
-
-async def get_interface_current_traffic(switch_ip: str, interface: str) -> dict:
-    """获取指定交换机接口的当前流量数据"""
-    try:
-        def sync_get_record():
-            with SessionLocal() as session:
-                record = session.query(SwitchTrafficRecord).filter(
-                    SwitchTrafficRecord.switch_ip == switch_ip,
-                    SwitchTrafficRecord.interface == interface
-                ).order_by(SwitchTrafficRecord.timestamp.desc()).first()
-
-                if not record:
-                    return {
-                        "switch_ip": switch_ip,
-                        "interface": interface,
-                        "rate_in": 0.0,
-                        "rate_out": 0.0,
-                        "bytes_in": 0,
-                        "bytes_out": 0
-                    }
-
-                return {
-                    "switch_ip": switch_ip,
-                    "interface": interface,
-                    "rate_in": record.rate_in,
-                    "rate_out": record.rate_out,
-                    "bytes_in": record.bytes_in,
-                    "bytes_out": record.bytes_out
-                }
-
-        return await asyncio.to_thread(sync_get_record)
-    except Exception as e:
-        logger.error(f"获取接口流量失败: {str(e)}")
-        raise HTTPException(500, f"获取接口流量失败: {str(e)}")
-
-
-@router.get("/traffic/switch/current", summary="获取交换机的当前流量数据")
-async def get_switch_current_traffic(switch_ip: str, interface: str = None):
-    try:
-        monitor = get_switch_monitor(switch_ip)
-        if not interface:
-            traffic_data = {}
-            for iface in monitor.interface_oids:
-                traffic_data[iface] = await get_interface_current_traffic(switch_ip, iface)
-            return {
-                "switch_ip": switch_ip,
-                "traffic": traffic_data
-            }
-        return await get_interface_current_traffic(switch_ip, interface)
-    except Exception as e:
-        logger.error(f"获取交换机流量失败: {str(e)}")
-        raise HTTPException(500, f"获取流量失败: {str(e)}")
-
-
-@router.get("/traffic/switch/history", summary="获取交换机的流量历史数据")
-async def get_switch_traffic_history(switch_ip: str, interface: str = None, minutes: int = 10):
-    try:
-        monitor = get_switch_monitor(switch_ip)
-        if not interface:
-            return {
-                "switch_ip": switch_ip,
-                "history": await asyncio.to_thread(monitor.get_traffic_history)
-            }
-
-        def sync_get_history():
-            with SessionLocal() as session:
-                time_threshold = datetime.now() - timedelta(minutes=minutes)
-                records = session.query(SwitchTrafficRecord).filter(
-                    SwitchTrafficRecord.switch_ip == switch_ip,
-                    SwitchTrafficRecord.interface == interface,
-                    SwitchTrafficRecord.timestamp >= time_threshold
-                ).order_by(SwitchTrafficRecord.timestamp.asc()).all()
-
-                history_data = {
-                    "in": [record.rate_in for record in records],
-                    "out": [record.rate_out for record in records],
-                    "time": [record.timestamp.isoformat() for record in records]
-                }
-                return history_data
-
-        history_data = await asyncio.to_thread(sync_get_history)
-        return {
-            "switch_ip": switch_ip,
-            "interface": interface,
-            "history": history_data
-        }
-    except Exception as e:
-        logger.error(f"获取历史流量失败: {str(e)}")
-        raise HTTPException(500, f"获取历史流量失败: {str(e)}")
-
-
-@router.websocket("/ws/traffic/switch")
-async def websocket_switch_traffic(websocket: WebSocket, switch_ip: str, interface: str = None):
-    await websocket.accept()
-    try:
-        monitor = get_switch_monitor(switch_ip)
-        while True:
-            if interface:
-                traffic_data = await get_interface_current_traffic(switch_ip, interface)
-                await websocket.send_json(traffic_data)
-            else:
-                traffic_data = {}
-                for iface in monitor.interface_oids:
-                    traffic_data[iface] = await get_interface_current_traffic(switch_ip, iface)
-                await websocket.send_json({
-                    "switch_ip": switch_ip,
-                    "traffic": traffic_data
-                })
-            await asyncio.sleep(1)
-    except WebSocketDisconnect:
-        logger.info(f"客户端断开交换机流量连接: {switch_ip}")
-    except Exception as e:
-        logger.error(f"交换机流量WebSocket错误: {str(e)}")
-        await websocket.close(code=1011, reason=str(e))
-
-
-@router.get("/traffic/switch/plot", response_class=HTMLResponse, summary="交换机流量可视化")
-async def plot_switch_traffic(switch_ip: str, interface: str, minutes: int = 10):
-    try:
-        history = await get_switch_traffic_history(switch_ip, interface, minutes)
-        history_data = history["history"]
-        time_points = [datetime.fromisoformat(t) for t in history_data["time"]]
-        in_rates = history_data["in"]
-        out_rates = history_data["out"]
-
-        def generate_plot():
-            plt.figure(figsize=(12, 6))
-            plt.plot(time_points, in_rates, label="流入流量 (B/s)")
-            plt.plot(time_points, out_rates, label="流出流量 (B/s)")
-            plt.title(f"交换机 {switch_ip} 接口 {interface} 流量监控 - 最近 {minutes} 分钟")
-            plt.xlabel("时间")
-            plt.ylabel("流量 (字节/秒)")
-            plt.legend()
-            plt.grid(True)
-            plt.xticks(rotation=45)
-            plt.tight_layout()
-            buf = io.BytesIO()
-            plt.savefig(buf, format="png")
-            buf.seek(0)
-            image_base64 = base64.b64encode(buf.read()).decode("utf-8")
-            plt.close()
-            return image_base64
-
-        image_base64 = await asyncio.to_thread(generate_plot)
-        return f"""
-        <html>
-            <head>
-                <title>交换机流量监控</title>
-                <style>
-                    body {{ font-family: Arial, sans-serif; margin: 20px; }}
-                    .container {{ max-width: 900px; margin: 0 auto; }}
-                </style>
-            </head>
-            <body>
-                <div class="container">
-                    <h1>交换机 {switch_ip} 接口 {interface} 流量监控</h1>
-                    <img src="data:image/png;base64,{image_base64}" alt="流量图表">
-                    <p>更新时间: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}</p>
-                </div>
-            </body>
-        </html>
-        """
-    except Exception as e:
-        logger.error(f"生成流量图表失败: {str(e)}")
-        return HTMLResponse(content=f"<h1>错误</h1><p>{str(e)}</p>", status_code=500)
-
-
 @router.get("/network_adapters", summary="获取网络适配器网段")
 async def get_network_adapters():
     try:
@@ -403,3 +169,131 @@ async def get_network_adapters():
         return {"networks": networks}
     except Exception as e:
         return {"error": f"获取网络适配器信息失败: {str(e)}"}
+
+
+@router.post("/traffic/realtime", summary="查询交换机接口实时流量")
+async def get_realtime_traffic(request: TrafficQueryRequest):
+    """
+    查询交换机接口实时流量速率(Kbps)
+
+    - 支持多个接口同时查询
+    - 首次查询速率返回 0
+    - 单个接口查询失败不影响其他接口
+    """
+    # 提取认证信息
+    username = request.username or settings.SWITCH_USERNAME
+    password = request.password or settings.SWITCH_PASSWORD
+
+    # 创建配置器(复用连接池)
+    configurator = SwitchConfigurator(
+        username=username,
+        password=password,
+        timeout=settings.SWITCH_TIMEOUT
+    )
+
+    results = []
+    current_time = time.time()
+
+    # 遍历所有接口
+    for interface in request.interfaces:
+        interface_data = {
+            "interface": interface,
+            "status": "unknown",
+            "in_speed_kbps": 0.0,
+            "out_speed_kbps": 0.0,
+            "in_bytes": 0,
+            "out_bytes": 0,
+            "error": None
+        }
+
+        try:
+            # 获取查询命令
+            command = traffic_monitor.get_query_command(request.vendor, interface)
+            if not command:
+                interface_data["error"] = f"不支持的厂商: {request.vendor}"
+                results.append(interface_data)
+                continue
+
+            # 执行查询命令
+            try:
+                output = await configurator.execute_raw_commands(
+                    ip=request.switch_ip,
+                    commands=[command]
+                )
+
+                # 解析输出
+                stats = traffic_monitor.parse_interface_stats(request.vendor, str(output))
+                if stats is None:
+                    interface_data["error"] = "解析接口统计失败"
+                    results.append(interface_data)
+                    continue
+
+                in_bytes, out_bytes, status = stats
+
+                # 计算速率
+                in_speed_kbps, out_speed_kbps = traffic_monitor.calculate_speed(
+                    request.switch_ip,
+                    interface,
+                    in_bytes,
+                    out_bytes,
+                    current_time
+                )
+
+                # 更新结果
+                interface_data.update({
+                    "status": status,
+                    "in_speed_kbps": round(in_speed_kbps, 2),
+                    "out_speed_kbps": round(out_speed_kbps, 2),
+                    "in_bytes": in_bytes,
+                    "out_bytes": out_bytes
+                })
+
+            except Exception as e:
+                interface_data["error"] = f"查询失败: {str(e)}"
+                logger.error(f"查询接口 {interface} 失败: {e}")
+
+        except Exception as e:
+            interface_data["error"] = f"未知错误: {str(e)}"
+            logger.error(f"处理接口 {interface} 时发生异常: {e}", exc_info=True)
+
+        results.append(interface_data)
+
+    return {
+        "success": True,
+        "switch_ip": request.switch_ip,
+        "vendor": request.vendor,
+        "timestamp": datetime.utcnow().isoformat() + "Z",
+        "data": results
+    }
+
+
+@router.delete("/traffic/cache/clear", summary="清除流量监控缓存")
+async def clear_traffic_cache(switch_ip: Optional[str] = None):
+    """
+    清除流量监控缓存
+
+    - 不指定 switch_ip: 清除所有缓存
+    - 指定 switch_ip: 只清除该交换机的缓存
+    """
+    try:
+        count = traffic_monitor.clear_cache(switch_ip)
+        return {
+            "success": True,
+            "message": f"已清除 {count} 条缓存记录",
+            "switch_ip": switch_ip or "all"
+        }
+    except Exception as e:
+        raise HTTPException(500, f"清除缓存失败: {str(e)}")
+
+
+@router.get("/traffic/cache/stats", summary="获取缓存统计信息")
+async def get_cache_stats():
+    """获取流量监控缓存统计信息"""
+    try:
+        stats = traffic_monitor.get_cache_stats()
+        return {
+            "success": True,
+            "stats": stats
+        }
+    except Exception as e:
+        raise HTTPException(500, f"获取缓存统计失败: {str(e)}")

src/backend/app/models/requests.py

@@ -24,3 +24,11 @@ class CLICommandRequest(BaseModel):
 
     def extract_credentials(self):
         return self.username or "NONE", self.password or "NONE"
+
+class TrafficQueryRequest(BaseModel):
+    """实时流量查询请求"""
+    switch_ip: str
+    vendor: str  # huawei/cisco/h3c/ruijie/zte
+    interfaces: List[str]  # 例如: ["GigabitEthernet0/0/1", "GigabitEthernet0/0/2"]
+    username: Optional[str] = None
+    password: Optional[str] = None

src/backend/app/models/traffic_models.py

@@ -1,51 +0,0 @@
-from src.backend.app.api.database import Base  # 修复：导入 Base
-from sqlalchemy import Column, Integer, String, DateTime, BigInteger, Float
-
-
-class TrafficRecord(Base):
-    """网络流量记录模型"""
-    __tablename__ = "traffic_records"
-
-    id = Column(Integer, primary_key=True, index=True)
-    interface = Column(String(50), index=True)
-    bytes_sent = Column(Integer)
-    bytes_recv = Column(Integer)
-    packets_sent = Column(Integer)
-    packets_recv = Column(Integer)
-    timestamp = Column(DateTime)
-
-    def to_dict(self):
-        return {
-            "id": self.id,
-            "interface": self.interface,
-            "bytes_sent": self.bytes_sent,
-            "bytes_recv": self.bytes_recv,
-            "packets_sent": self.packets_sent,
-            "packets_recv": self.packets_recv,
-            "timestamp": self.timestamp.isoformat()
-        }
-
-
-class SwitchTrafficRecord(Base):
-    __tablename__ = "switch_traffic_records"
-
-    id = Column(Integer, primary_key=True, index=True)
-    switch_ip = Column(String(50), index=True)
-    interface = Column(String(50))
-    bytes_in = Column(BigInteger)
-    bytes_out = Column(BigInteger)
-    rate_in = Column(Float)
-    rate_out = Column(Float)
-    timestamp = Column(DateTime)
-
-    def to_dict(self):
-        return {
-            "id": self.id,
-            "switch_ip": self.switch_ip,
-            "interface": self.interface,
-            "bytes_in": self.bytes_in,
-            "bytes_out": self.bytes_out,
-            "rate_in": self.rate_in,
-            "rate_out": self.rate_out,
-            "timestamp": self.timestamp.isoformat()
-        }

src/backend/app/services/switch_traffic_monitor.py

@@ -1,182 +0,0 @@
-import asyncio
-from datetime import datetime
-from collections import deque
-from typing import Optional, List, Dict
-from pysnmp.hlapi import *
-from ..models.traffic_models import SwitchTrafficRecord
-from src.backend.app.api.database import SessionLocal
-from ..utils.logger import logger
-
-#V=ΔQ'-ΔQ/Δt (B/s)
-class SwitchTrafficMonitor:
-    def __init__(
-            self,
-            switch_ip: str,
-            community: str = 'public',
-            update_interval: int = 5,
-            interfaces: Optional[List[str]] = None
-    ):
-        self.switch_ip = switch_ip
-        self.community = community
-        self.update_interval = update_interval
-        self.running = False
-        self.task = None
-        self.interface_history = {}
-        self.history = {
-            "in": deque(maxlen=300),
-            "out": deque(maxlen=300),
-            "time": deque(maxlen=300)
-        }
-
-        self.interface_oids = {
-            "GigabitEthernet0/0/1": {
-                "in": '1.3.6.1.2.1.2.2.1.10.1',
-                "out": '1.3.6.1.2.1.2.2.1.16.1'
-            },
-            "GigabitEthernet0/0/24": {
-                "in": '1.3.6.1.2.1.2.2.1.10.24',
-                "out": '1.3.6.1.2.1.2.2.1.16.24'
-            }
-        }
-
-        if interfaces:
-            self.interface_oids = {
-                iface: oid for iface, oid in self.interface_oids.items()
-                if iface in interfaces
-            }
-            logger.info(f"监控指定接口: {', '.join(interfaces)}")
-        else:
-            logger.info("监控所有接口")
-
-    def start_monitoring(self):
-        """启动交换机流量监控"""
-        if not self.running:
-            self.running = True
-            self.task = asyncio.create_task(self._monitor_loop())
-            logger.success(f"交换机流量监控已启动: {self.switch_ip}")
-
-    async def stop_monitoring(self):
-        """停止监控"""
-        if self.running:
-            self.running = False
-            if self.task:
-                self.task.cancel()
-                try:
-                    await self.task
-                except asyncio.CancelledError:
-                    pass
-            logger.info(f"交换机流量监控已停止: {self.switch_ip}")
-
-    async def _monitor_loop(self):
-        """监控主循环"""
-        last_values = {iface: {"in": 0, "out": 0} for iface in self.interface_oids}
-        last_time = datetime.now()
-
-        while self.running:
-            await asyncio.sleep(self.update_interval)
-
-            try:
-                current_time = datetime.now()
-                elapsed = (current_time - last_time).total_seconds()
-
-                for iface, oids in self.interface_oids.items():
-                    in_octets = self._snmp_get(oids["in"])
-                    out_octets = self._snmp_get(oids["out"])
-
-                    if in_octets is not None and out_octets is not None:
-
-                        iface_values = last_values[iface]
-                        in_rate = (in_octets - iface_values["in"]) / elapsed if iface_values["in"] > 0 else 0
-                        out_rate = (out_octets - iface_values["out"]) / elapsed if iface_values["out"] > 0 else 0
-
-                        self.history["in"].append(in_rate)
-                        self.history["out"].append(out_rate)
-                        self.history["time"].append(current_time)
-
-                        self._save_to_db(iface, in_octets, out_octets, in_rate, out_rate, current_time)
-
-                        iface_values["in"] = in_octets
-                        iface_values["out"] = out_octets
-
-                last_time = current_time
-            except Exception as e:
-                logger.error(f"监控交换机流量出错: {str(e)}")
-
-    def _snmp_get(self, oid) -> Optional[int]:
-        """执行SNMP GET请求"""
-        try:
-            cmd = getCmd(
-                SnmpEngine(),
-                CommunityData(self.community),
-                UdpTransportTarget((self.switch_ip, 161)),
-                ContextData(),
-                ObjectType(ObjectIdentity(oid)))
-
-            errorIndication, errorStatus, errorIndex, varBinds = next(cmd)
-        except Exception as e:
-            logger.error(f"SNMP请求失败: {str(e)}")
-            return None
-
-        if errorIndication:
-            logger.error(f"SNMP错误: {errorIndication}")
-            return None
-        elif errorStatus:
-            try:
-                if errorIndex:
-                    index_val = int(errorIndex) - 1
-                    error_item = varBinds[index_val] if index_val < len(varBinds) else '?'
-                else:
-                    error_item = '?'
-
-                error_msg = f"SNMP错误: {errorStatus.prettyPrint()} at {error_item}"
-                logger.error(error_msg)
-            except Exception as e:
-                logger.error(f"解析SNMP错误失败: {str(e)}")
-            return None
-        else:
-            for varBind in varBinds:
-                try:
-                    return int(varBind[1])
-                except Exception as e:
-                    logger.error(f"转换SNMP值失败: {str(e)}")
-                    return None
-
-        return None
-
-    def _save_to_db(self, interface: str, in_octets: int, out_octets: int,
-                    in_rate: float, out_rate: float, timestamp: datetime):
-        """保存流量数据到数据库"""
-        try:
-            with SessionLocal() as session:
-                record = SwitchTrafficRecord(
-                    switch_ip=self.switch_ip,
-                    interface=interface,
-                    bytes_in=in_octets,
-                    bytes_out=out_octets,
-                    rate_in=in_rate,
-                    rate_out=out_rate,
-                    timestamp=timestamp
-                )
-                session.add(record)
-                session.commit()
-        except Exception as e:
-            logger.error(f"保存流量数据到数据库失败: {str(e)}")
-
-    def get_traffic_history(self) -> Dict[str, List]:
-        """获取流量历史数据"""
-        return {
-            "in": list(self.history["in"]),
-            "out": list(self.history["out"]),
-            "time": list(self.history["time"])
-        }
-
-switch_monitors = {}
-def get_switch_monitor(switch_ip: str, community: str = 'public', interfaces: Optional[List[str]] = None):
-    """获取或创建交换机监控器"""
-    if switch_ip not in switch_monitors:
-        switch_monitors[switch_ip] = SwitchTrafficMonitor(
-            switch_ip,
-            community,
-            interfaces=interfaces
-        )
-    return switch_monitors[switch_ip]

src/backend/app/services/test.py

@@ -1,9 +0,0 @@
-# test_linprog.py
-import numpy as np
-from scipy.optimize import linprog
-
-c = np.array([-1, -2])
-A_ub = np.array([[1, 1]])
-b_ub = np.array([3])
-res = linprog(c, A_ub=A_ub, b_ub=b_ub, method='highs')
-print(res)

src/backend/app/services/traffic_monitor.py

@@ -1,145 +1,195 @@
-import psutil
+import re
 import time
 import asyncio
+from typing import Dict, List, Optional, Tuple
 from datetime import datetime
-from collections import deque
-from typing import Dict, Optional, List
 
-
-from ..models.traffic_models import TrafficRecord
-from src.backend.app.api.database import SessionLocal
-from ..utils.logger import logger
+from src.backend.app.utils.logger import logger
 
 
 class TrafficMonitor:
-    def __init__(self, history_size: int = 300):
-        self.history_size = history_size
-        self.history = {
-            "sent": deque(maxlen=history_size),
-            "recv": deque(maxlen=history_size),
-            "time": deque(maxlen=history_size),
-            "interfaces": {}
+    """
+    交换机流量监控服务
+    通过 Telnet CLI 查询接口流量统计,计算实时速率
+    """
+
+    # 各厂商查询接口流量的CLI命令模板
+    VENDOR_COMMANDS = {
+        "huawei": "display interface {interface}",
+        "cisco": "show interface {interface}",
+        "h3c": "display interface {interface}",
+        "ruijie": "show interface {interface}",
+        "zte": "show interface {interface}",
     }
-        self.running = False
-        self.task = None
-        self.update_interval = 1.0  # 秒
 
-    @staticmethod
-    def get_interfaces() -> List[str]:
-        """获取所有网络接口名称"""
-        return list(psutil.net_io_counters(pernic=True).keys())
+    def __init__(self):
+        # 流量计数器缓存: key = "switch_ip:interface", value = {"timestamp": float, "in_bytes": int, "out_bytes": int}
+        self.traffic_cache: Dict[str, Dict] = {}
 
-    def start_monitoring(self):
-        """启动流量监控"""
-        if not self.running:
-            self.running = True
-            self.task = asyncio.create_task(self._monitor_loop())
-            logger.info("流量监控已启动")
+        # 缓存TTL(秒), 30分钟未访问则自动清理
+        self.cache_ttl = 1800
+
+    def get_query_command(self, vendor: str, interface: str) -> Optional[str]:
+        """根据厂商和接口名生成查询命令"""
+        vendor_lower = vendor.lower()
+        if vendor_lower not in self.VENDOR_COMMANDS:
+            logger.warning(f"不支持的厂商: {vendor}")
+            return None
+
+        return self.VENDOR_COMMANDS[vendor_lower].format(interface=interface)
+
+    def parse_interface_stats(self, vendor: str, output: str) -> Optional[Tuple[int, int, str]]:
+        """
+        解析CLI输出,提取入/出方向字节数和接口状态
+
+        返回: (in_bytes, out_bytes, status) 或 None
+        """
+        vendor_lower = vendor.lower()
 
-    async def stop_monitoring(self):
-        """停止流量监控"""
-        if self.running:
-            self.running = False
-            self.task.cancel()
         try:
-                await self.task
-            except asyncio.CancelledError:
-                pass
-            logger.info("流量监控已停止")
+            # 提取接口状态
+            status = "unknown"
+            if re.search(r'(current state|line protocol).*?(UP|up)', output, re.IGNORECASE):
+                status = "up"
+            elif re.search(r'(current state|line protocol).*?(DOWN|down)', output, re.IGNORECASE):
+                status = "down"
 
-    async def _monitor_loop(self):
-        """监控主循环"""
-        last_stats = psutil.net_io_counters(pernic=True)
-        last_time = time.time()
+            # 华为/H3C格式: "Input:  12345 packets, 1048576000 bytes"
+            if vendor_lower in ["huawei", "h3c"]:
+                match_in = re.search(r'Input:.*?(\d+)\s+bytes', output, re.IGNORECASE)
+                match_out = re.search(r'Output:.*?(\d+)\s+bytes', output, re.IGNORECASE)
 
-        while self.running:
-            await asyncio.sleep(self.update_interval)
+                if match_in and match_out:
+                    in_bytes = int(match_in.group(1))
+                    out_bytes = int(match_out.group(1))
+                    return (in_bytes, out_bytes, status)
 
+            # Cisco/锐捷/中兴格式: "12345 packets input, 1048576000 bytes"
+            elif vendor_lower in ["cisco", "ruijie", "zte"]:
+                match_in = re.search(r'(\d+)\s+packets input,\s+(\d+)\s+bytes', output, re.IGNORECASE)
+                match_out = re.search(r'(\d+)\s+packets output,\s+(\d+)\s+bytes', output, re.IGNORECASE)
+
+                if match_in and match_out:
+                    in_bytes = int(match_in.group(2))
+                    out_bytes = int(match_out.group(2))
+                    return (in_bytes, out_bytes, status)
+
+            logger.warning(f"无法解析 {vendor} 厂商的输出")
+            return None
+
+        except Exception as e:
+            logger.error(f"解析接口统计失败: {e}", exc_info=True)
+            return None
+
+    def calculate_speed(
+        self,
+        switch_ip: str,
+        interface: str,
+        current_in: int,
+        current_out: int,
+        current_time: float
+    ) -> Tuple[float, float]:
+        """
+        计算接口速率(Kbps)
+
+        返回: (in_speed_kbps, out_speed_kbps)
+        """
+        cache_key = f"{switch_ip}:{interface}"
+
+        # 检查是否有历史数据
+        if cache_key not in self.traffic_cache:
+            # 首次查询,保存数据但返回0速率
+            self.traffic_cache[cache_key] = {
+                "timestamp": current_time,
+                "in_bytes": current_in,
+                "out_bytes": current_out
+            }
+            logger.info(f"首次查询 {cache_key}, 速率返回 0")
+            return (0.0, 0.0)
+
+        # 获取历史数据
+        cached = self.traffic_cache[cache_key]
+        time_diff = current_time - cached["timestamp"]
+
+        # 时间间隔太短,避免除零
+        if time_diff < 0.1:
+            logger.warning(f"{cache_key} 查询间隔过短 ({time_diff}s), 返回上次速率")
+            return (0.0, 0.0)
+
+        # 计算字节差(处理计数器溢出)
+        in_diff = self._calculate_diff(current_in, cached["in_bytes"])
+        out_diff = self._calculate_diff(current_out, cached["out_bytes"])
+
+        # 计算速率: (字节差 * 8 bits/byte) / 时间差(秒) / 1000 = Kbps
+        in_speed_kbps = (in_diff * 8) / time_diff / 1000
+        out_speed_kbps = (out_diff * 8) / time_diff / 1000
+
+        # 更新缓存
+        self.traffic_cache[cache_key] = {
+            "timestamp": current_time,
+            "in_bytes": current_in,
+            "out_bytes": current_out
+        }
+
+        logger.debug(f"{cache_key} 速率: IN={in_speed_kbps:.2f} Kbps, OUT={out_speed_kbps:.2f} Kbps")
+        return (in_speed_kbps, out_speed_kbps)
+
+    def _calculate_diff(self, current: int, previous: int) -> int:
+        """
+        计算字节差,处理32位计数器溢出
+
+        Reason: 交换机的流量计数器通常是32位,超过4GB会回绕到0
+        """
+        if current >= previous:
+            return current - previous
+        else:
+            # 计数器溢出,假设32位
+            return (2**32 - previous) + current
+
+    def cleanup_expired_cache(self):
+        """清理过期的缓存数据"""
         current_time = time.time()
-            current_stats = psutil.net_io_counters(pernic=True)
-            elapsed = current_time - last_time
+        expired_keys = []
 
-            for iface in current_stats:
-                if iface not in self.history["interfaces"]:
+        for key, data in self.traffic_cache.items():
+            if current_time - data["timestamp"] > self.cache_ttl:
+                expired_keys.append(key)
 
-                    self.history["interfaces"][iface] = {
-                        "sent": deque(maxlen=self.history_size),
-                        "recv": deque(maxlen=self.history_size)
-                    }
+        for key in expired_keys:
+            del self.traffic_cache[key]
+            logger.info(f"清理过期缓存: {key}")
 
-                if iface in last_stats:
-                    sent_rate = (current_stats[iface].bytes_sent - last_stats[iface].bytes_sent) / elapsed
-                    recv_rate = (current_stats[iface].bytes_recv - last_stats[iface].bytes_recv) / elapsed
+        return len(expired_keys)
 
+    def clear_cache(self, switch_ip: Optional[str] = None):
+        """
+        清除缓存
 
-                    self.history["sent"].append(sent_rate)
-                    self.history["recv"].append(recv_rate)
-                    self.history["time"].append(datetime.now())
+        Args:
+            switch_ip: 如果指定,只清除该交换机的缓存;否则清除所有
+        """
+        if switch_ip:
+            # 清除指定交换机的缓存
+            keys_to_remove = [k for k in self.traffic_cache.keys() if k.startswith(f"{switch_ip}:")]
+            for key in keys_to_remove:
+                del self.traffic_cache[key]
+            logger.info(f"清除交换机 {switch_ip} 的缓存,共 {len(keys_to_remove)} 条")
+            return len(keys_to_remove)
+        else:
+            # 清除所有缓存
+            count = len(self.traffic_cache)
+            self.traffic_cache.clear()
+            logger.info(f"清除所有缓存,共 {count} 条")
+            return count
 
-
-                    self.history["interfaces"][iface]["sent"].append(sent_rate)
-                    self.history["interfaces"][iface]["recv"].append(recv_rate)
-
-
-            self._save_to_db(current_stats)
-
-            last_stats = current_stats
-            last_time = current_time
-
-    @staticmethod
-    def _save_to_db(stats):
-        """保存流量数据到数据库"""
-        with SessionLocal() as session:
-            for iface, counters in stats.items():
-                record = TrafficRecord(
-                    interface=iface,
-                    bytes_sent=counters.bytes_sent,
-                    bytes_recv=counters.bytes_recv,
-                    packets_sent=counters.packets_sent,
-                    packets_recv=counters.packets_recv,
-                    timestamp=datetime.now()
-                )
-                session.add(record)
-            session.commit()
-
-    def get_current_traffic(self, interface: Optional[str] = None) -> Dict:
-        """获取当前流量数据"""
-        stats = psutil.net_io_counters(pernic=True)
-
-        if interface:
-            if interface in stats:
-                return self._format_interface_stats(stats[interface])
-            return {}
-
-        return {iface: self._format_interface_stats(data) for iface, data in stats.items()}
-
-    @staticmethod
-    def _format_interface_stats(counters) -> Dict:
-        """格式化接口统计数据"""
+    def get_cache_stats(self) -> Dict:
+        """获取缓存统计信息"""
         return {
-            "bytes_sent": counters.bytes_sent,
-            "bytes_recv": counters.bytes_recv,
-            "packets_sent": counters.packets_sent,
-            "packets_recv": counters.packets_recv,
-            "errin": counters.errin,
-            "errout": counters.errout,
-            "dropin": counters.dropin,
-            "dropout": counters.dropout
+            "total_entries": len(self.traffic_cache),
+            "cache_ttl_seconds": self.cache_ttl,
+            "entries": list(self.traffic_cache.keys())
         }
 
-    def get_traffic_history(self, interface: Optional[str] = None) -> Dict:
-        """获取流量历史数据"""
-        if interface and interface in self.history["interfaces"]:
-            return {
-                "sent": list(self.history["interfaces"][interface]["sent"]),
-                "recv": list(self.history["interfaces"][interface]["recv"]),
-                "time": list(self.history["time"])
-            }
-
-        return {
-            "sent": list(self.history["sent"]),
-            "recv": list(self.history["recv"]),
-            "time": list(self.history["time"])
-        }
 
+# 全局单例
 traffic_monitor = TrafficMonitor()