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从零开始搭建React+TypeScript+webpack开发环境-自定义配置化的模拟服务器

news 2025/9/14 5:44:45

技术栈

我们将使用Node.js和Express.js作为我们的后端框架，以及Node.js的文件系统(fs)模块来操作文件和文件夹。此外，我们将使用Node.js的require和delete require.cache来加载和更新模拟数据。

项目结构

首先，让我们定义一个简单的项目结构：

- your-project/- mock/- api/- users.json- other/- products.json- server.js

在mock文件夹中，我们可以为不同的API接口创建不同的子文件夹，并在每个子文件夹中放置相应的JSON文件，以模拟不同的数据。然后，我们将在server.js文件中创建我们的配置化的模拟服务器。

代码示例

const path = require('path');
const fs = require('fs');
const express = require('express');function watchMockFiles(mockDirectory, mockData) {function watchDirectory(directory) {fs.watch(directory, (eventType, filename) => {if (filename.endsWith('.json')) {const mockPath = path.join(directory, filename);const mockKey = path.relative(mockDirectory, mockPath).replace('.json', '').replace(/\\/g, '/');delete require.cache[require.resolve(mockPath)];const jsonData = require(mockPath);mockData[mockKey] = jsonData;console.log(`Updated mock data for ${mockKey}`);}});fs.readdirSync(directory).forEach((file) => {const fullPath = path.join(directory, file);const stats = fs.statSync(fullPath);if (stats.isDirectory()) {watchDirectory(fullPath);}});}watchDirectory(mockDirectory);
}function readMockFiles(mockDirectory) {const mockData = {};function traverse(directory) {const files = fs.readdirSync(directory);files.forEach((file) => {const fullPath = path.join(directory, file);const stats = fs.statSync(fullPath);if (stats.isDirectory()) {traverse(fullPath);} else if (file.endsWith('.json')) {const mockKey = path.relative(mockDirectory, fullPath).replace('.json', '').replace(/\\/g, '/');const jsonData = require(fullPath);mockData[mockKey] = jsonData;}});}traverse(mockDirectory);return mockData;
}function configureMockDevServer({mockDirectory = path.resolve(__dirname, 'mock'),defaultResponseTime = 2000,
}) {const mockData = readMockFiles(mockDirectory);watchMockFiles(mockDirectory, mockData);const app = express();app.use('/api', (req, res) => {const url = req.originalUrl;const mockKey = url.replace('/api/', '');if (mockData[mockKey]) {const { responseTime = defaultResponseTime, statusCode = 200 } = mockData[mockKey];setTimeout(() => {res.status(statusCode).json(mockData[mockKey].data);}, responseTime);} else {res.status(404).json({ error: 'Mock data not found' });}});const port = 3000;app.listen(port, () => {console.log(`Mock server is running on port ${port}`);});
}configureMockDevServer();