feat: Add child_process demo and update README
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README.md
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@@ -15,6 +15,7 @@ short_description: 演示 Node.js 大文件流式读写、XML/JSON 处理及性
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1. **大文件流式处理**：使用 Stream API 高效读写 GB 级文件，避免内存溢出。
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2. **XML 与 JSON 处理**：演示 `fast-xml-parser` 和 `stream-json` 的使用。
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3. **性能监控**：使用 `perf_hooks` 和 `process.memoryUsage` 实时监控执行时间和内存占用。
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## 功能特性
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1. **大文件流式处理**：使用 Stream API 高效读写 GB 级文件，避免内存溢出。
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2. **XML 与 JSON 处理**：演示 `fast-xml-parser` 和 `stream-json` 的使用。
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3. **性能监控**：使用 `perf_hooks` 和 `process.memoryUsage` 实时监控执行时间和内存占用。
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4. **核心 API 演示**：全面展示 `fs` (文件系统), `path` (路径处理), `stream` (流), `child_process` (子进程) 等 Node.js 核心模块的应用。
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## 功能特性
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index.js
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@@ -5,6 +5,8 @@ const LargeFileHandler = require('./src/largeFile');
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const xmlJsonHandler = require('./src/xmlJson');
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const performanceMonitor = require('./src/performance');
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const app = express();
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const PORT = 7860;
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@@ -130,17 +132,43 @@ app.get('/', async (req, res) => {
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body { font-family: monospace; background: #f0f0f0; padding: 20px; }
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pre { background: #fff; padding: 20px; border-radius: 5px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); white-space: pre-wrap; }
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h1 { color: #333; }
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</style>
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</head>
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<body>
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<h1>Node.js Performance Demo Output</h1>
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<pre>${output}</pre>
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<p>Refresh to run again.</p>
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</body>
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</html>
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`);
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});
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app.listen(PORT, () => {
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console.log(`Server is running on http://localhost:${PORT}`);
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});
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const xmlJsonHandler = require('./src/xmlJson');
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const performanceMonitor = require('./src/performance');
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const { exec } = require('child_process');
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const app = express();
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const PORT = 7860;
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body { font-family: monospace; background: #f0f0f0; padding: 20px; }
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pre { background: #fff; padding: 20px; border-radius: 5px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); white-space: pre-wrap; }
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h1 { color: #333; }
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.btn { display: inline-block; padding: 10px 20px; background: #007bff; color: white; text-decoration: none; border-radius: 5px; margin-top: 20px; }
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</style>
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</head>
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<body>
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<h1>Node.js Performance Demo Output</h1>
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<pre>${output}</pre>
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<p>Refresh to run again.</p>
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<a href="/system-info" class="btn">View System Info (child_process demo)</a>
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</body>
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</html>
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`);
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});
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app.get('/system-info', (req, res) => {
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exec('uname -a && echo "\\nDisk Usage:" && df -h | head -n 5', (error, stdout, stderr) => {
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const output = error ? `Error: ${error.message}` : stdout;
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res.send(`
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<html>
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<head>
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<title>System Info</title>
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<style>
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body { font-family: monospace; background: #f0f0f0; padding: 20px; }
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pre { background: #fff; padding: 20px; border-radius: 5px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); white-space: pre-wrap; }
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h1 { color: #333; }
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.btn { display: inline-block; padding: 10px 20px; background: #007bff; color: white; text-decoration: none; border-radius: 5px; margin-top: 20px; }
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</style>
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</head>
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<body>
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<h1>System Info (via child_process)</h1>
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<pre>${output}</pre>
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<a href="/" class="btn">Back to Demo</a>
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</body>
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</html>
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`);
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});
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});
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app.listen(PORT, () => {
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console.log(`Server is running on http://localhost:${PORT}`);
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});
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