add backend(model)

lib/backend_model/index.js

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+const express = require('express');
+const multer = require('multer');
+const bodyParser = require('body-parser');
+
+// 创建 express 应用
+const app = express();
+
+// 不需要保存文件，只使用内存存储
+const storage = multer.memoryStorage();
+const upload = multer({ storage: storage }); // 使用内存存储，不会保存文件到硬盘
+
+// 解析 JSON 请求体
+app.use(bodyParser.json());
+
+// 创建一个 POST 接口来接收上传的图片
+app.post('/api/upload', upload.single('image'), (req, res) => {
+  // 这里返回固定的物体检测结果，不需要保存文件
+  const fixedResponse = {
+    // success: true,
+    // message: '物体检测成功',
+    // result: {
+      objects: [
+        { name: 'Person', confidence: 0.98 },
+        { name: 'Car', confidence: 0.92 },
+        { name: 'Dog', confidence: 0.85 },
+      ]
+    // }
+  };
+
+  // 返回固定的分析结果
+  res.status(200).send(fixedResponse);
+});
+
+// 启动服务器
+const PORT = 3000;
+app.listen(PORT, () => {
+  console.log(`服务器已启动，监听端口 ${PORT}`);
+});

lib/backend_model/package.json

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+{
+  "name": "backend_model",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^2.2.1",
+    "express": "^5.2.1",
+    "multer": "^2.0.2"
+  }
+}