Add front-end functionality and improved server.py and node.py

frontend/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

frontend/README.md

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+# Getting Started with Create React App
+
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `npm start`
+
+Runs the app in the development mode.\
+Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
+
+The page will reload when you make changes.\
+You may also see any lint errors in the console.
+
+### `npm test`
+
+Launches the test runner in the interactive watch mode.\
+See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
+
+### `npm run build`
+
+Builds the app for production to the `build` folder.\
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.\
+Your app is ready to be deployed!
+
+See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
+
+### `npm run eject`
+
+**Note: this is a one-way operation. Once you `eject`, you can't go back!**
+
+If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
+
+Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
+
+You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
+
+## Learn More
+
+You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
+
+To learn React, check out the [React documentation](https://reactjs.org/).
+
+### Code Splitting
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
+
+### Analyzing the Bundle Size
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
+
+### Making a Progressive Web App
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
+
+### Advanced Configuration
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
+
+### Deployment
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
+
+### `npm run build` fails to minify
+
+This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)

frontend/package.json

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+{
+  "name": "frontend",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@testing-library/jest-dom": "^5.17.0",
+    "@testing-library/react": "^13.4.0",
+    "@testing-library/user-event": "^13.5.0",
+    "axios": "^1.7.7",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-scripts": "5.0.1",
+    "web-vitals": "^2.1.4"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}

frontend/public/index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>中央服务器路由</title>
+    <link rel="stylesheet" href="./index.css">
+</head>
+<body>
+    <div id="root"></div>
+    <script src="/frontend/static/js/bundle.js"></script> <!-- 通过构建工具引入打包后的JS文件 -->
+</body>
+</html>

frontend/public/manifest.json

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+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

frontend/public/robots.txt

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+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:

frontend/src/App.css

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+.App-header {
+  background-color: #282c34;
+  padding: 20px;
+  color: white;
+}
+
+.App {
+  text-align: center;
+  margin: 20px;
+}
+
+table {
+  margin: 20px auto;
+  border-collapse: collapse;
+}
+
+table, th, td {
+  border: 1px solid #ccc;
+  padding: 10px;
+}
+
+th {
+  background-color: #f0f0f0;
+}
+
+.log-info {
+  width: 80%;
+  margin: 20px auto;
+}

frontend/src/App.js

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+import React, { useEffect, useState } from 'react';
+import axios from 'axios';
+import WebSocketComponent from './WebSocketComponent';
+
+function App() {
+  const [nodes, setNodes] = useState([]);
+  const [node, setNode] = useState(null);
+  const [heartbeat, setHeartbeat] = useState(null);
+  const [nodesList, setNodesList] = useState([]);
+  const [ip, setIp] = useState(''); 
+  const [count, setCount] = useState('');
+
+  const fetchNodes = async () => {
+    try {
+      const response = await axios.get('/server/show_nodes');
+      setNodes(response.data);
+    } catch (error) {
+      console.error('Error fetching nodes:', error);
+    }
+  };
+
+  const fetchNode = async (ip) => {
+    try {
+      const response = await axios.get('/server/get_node', { params: { ip } });
+      setNode(response.data);
+    } catch (error) {
+      console.error('Error fetching node:', error);
+    }
+  };
+
+  const fetchHeartbeat = async (ip) => {
+    try {
+      const response = await axios.get('/server/heartbeat', { params: { ip } });
+      setHeartbeat(response.data);
+    } catch (error) {
+      console.error('Error fetching heartbeat:', error);
+    }
+  };
+
+  const fetchNodesList = async (count) => {
+    try {
+      const response = await axios.get('/server/send_nodes_list', { params: { count } });
+      setNodesList(response.data);
+    } catch (error) {
+      console.error('Error fetching nodes list:', error);
+    }
+  };
+
+  useEffect(() => {
+    fetchNodes(); // 获取所有节点
+  }, []);
+
+  const handleFetchNode = () => {
+    fetchNode(ip); // 根据输入的 IP 获取单个节点
+  };
+
+  const handleFetchHeartbeat = () => {
+    fetchHeartbeat(ip); // 根据输入的 IP 获取心跳信息
+  };
+
+  const handleFetchNodesList = () => {
+    fetchNodesList(count); // 根据输入的数量获取节点列表
+  };
+
+  return (
+    <div className="App">
+      <header className="App-header">
+        <h1>中央服务器路由</h1>
+
+        <h2>所有节点</h2>
+        {nodes.length > 0 ? (
+          <ul>
+            {nodes.map((node, index) => (
+              <li key={index}>{JSON.stringify(node)}</li>
+            ))}
+          </ul>
+        ) : (
+          <p>没有节点数据</p>
+        )}
+
+        <h2>单个节点</h2>
+        <input
+          type="text"
+          value={ip}
+          onChange={(e) => setIp(e.target.value)}
+          placeholder="输入节点 IP"
+        />
+        <button onClick={handleFetchNode}>获取节点</button>
+        {node ? <p>{JSON.stringify(node)}</p> : <p>没有单个节点数据</p>}
+
+        <h2>心跳信息</h2>
+        <button onClick={handleFetchHeartbeat}>获取心跳信息</button>
+        {heartbeat ? <p>{JSON.stringify(heartbeat)}</p> : <p>没有心跳数据</p>}
+
+        <h2>节点列表</h2>
+        <input
+          type="number"
+          value={count}
+          onChange={(e) => setCount(e.target.value)}
+          placeholder="输入节点数量"
+        />
+        <button onClick={handleFetchNodesList}>获取节点列表</button>
+        {nodesList.length > 0 ? (
+          <ul>
+            {nodesList.map((node, index) => (
+              <li key={index}>{JSON.stringify(node)}</li>
+            ))}
+          </ul>
+        ) : (
+          <p>没有节点列表数据</p>
+        )}
+      </header>
+      <WebSocketComponent/>
+    </div>
+  );
+}
+
+export default App;

frontend/src/WebSocketComponent.js

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+import React, { useEffect, useState, useRef, useCallback } from 'react';
+
+const WebSocketComponent = () => {
+    const [logs, setLogs] = useState([]);
+    const [nodes, setNodes] = useState([]);
+    const wsRef = useRef(null);
+    const heartbeatIntervalRef = useRef(null);
+
+    const connectWebSocket = useCallback(() => {
+        if (wsRef.current && wsRef.current.readyState === WebSocket.OPEN) {
+            return;  // 如果连接已经打开，不再重新连接
+        }
+
+        wsRef.current = new WebSocket('ws://localhost:8000/ws/logs');
+
+        wsRef.current.onopen = () => {
+            console.log('WebSocket 连接成功');
+            heartbeatIntervalRef.current = setInterval(() => {
+                if (wsRef.current.readyState === WebSocket.OPEN) {
+                    wsRef.current.send(JSON.stringify({ type: 'heartbeat' }));
+                }
+            }, 10000); // 心跳包间隔调整为 10 秒
+        };
+
+        wsRef.current.onmessage = (event) => {
+            setLogs((prevLogs) => [...prevLogs, event.data]);  // 直接加入收到的消息
+        };
+        
+
+        wsRef.current.onerror = (error) => {
+            console.error('WebSocket 错误: ', error);
+        };
+
+        wsRef.current.onclose = () => {
+            console.log('WebSocket 连接关闭，尝试重新连接...');
+            clearInterval(heartbeatIntervalRef.current);
+            // 确保 WebSocket 连接在关闭后再进行重连
+            setTimeout(() => {
+                connectWebSocket();
+            }, 5000);  // 延迟 5 秒再重连
+        };
+    }, []);
+
+    useEffect(() => {
+        connectWebSocket();
+        return () => {
+            if (wsRef.current) {
+                wsRef.current.close();
+            }
+            clearInterval(heartbeatIntervalRef.current);
+        };
+    }, [connectWebSocket]);
+        // 获取节点信息
+        const fetchNodes = useCallback(async () => {
+            try {
+                const response = await fetch('/server/show_nodes');
+                const data = await response.json();
+                setNodes(data);
+            } catch (error) {
+                console.error('Error fetching nodes:', error);
+            }
+        }, []);
+    
+        useEffect(() => {
+            connectWebSocket();
+            fetchNodes();  // 组件加载时获取节点信息
+            return () => {
+                if (wsRef.current) {
+                    wsRef.current.close();
+                }
+                clearInterval(heartbeatIntervalRef.current);
+            };
+        }, [connectWebSocket, fetchNodes]);
+    useEffect(() => {
+        const logContainer = document.querySelector('.log-info');
+        if (logContainer) {
+            logContainer.scrollTop = logContainer.scrollHeight;
+        }
+    }, [logs]);
+
+    return (
+        <div>
+            <h1>节点记录信息</h1>
+            <table>
+                <thead>
+                    <tr>
+                        <th>ID</th>
+                        <th>IP</th>
+                        <th>Last Heartbeat</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    {nodes.map((node) => (
+                        <tr key={node[0]}>
+                            <td>{node[0]}</td>
+                            <td>{node[1]}</td>
+                            <td>{new Date(node[2] * 1000).toLocaleString()}</td>
+                        </tr>
+                    ))}
+                </tbody>
+            </table>
+            <h2>日志信息</h2>
+            <div
+                className="log-info"
+                style={{ height: '300px', overflowY: 'scroll', background: '#fff', padding: '10px' }}
+            >
+                {logs.map((log, index) => (
+                    <p key={index} style={{ margin: '5px 0' }}>{log}</p>
+                ))}
+            </div>
+        </div>
+    );
+};
+
+export default WebSocketComponent;

frontend/src/index.css

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+/* src/index.css */
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', monospace;
+}

frontend/src/index.js

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+import React from 'react';
+import { createRoot } from 'react-dom/client';
+import App from './App';
+import './index.css';
+
+const container = document.getElementById('root');
+const root = createRoot(container);
+
+root.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);

frontend/src/setupProxy.js

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+const { createProxyMiddleware } = require('http-proxy-middleware');
+
+module.exports = function(app) {
+  app.use(
+    createProxyMiddleware('/server', {
+      target: 'http://localhost:8000',
+      changeOrigin: true,
+    })
+  );
+};