Node使用Express做简易数据测试服务

Node使用express做简易数据测试服务

初始化项目

1. 执行 npm init
2. 添加启动服务命令"start": "node app.js"到scripts节点下,npm start就为配置后的启动命令
3. 添加依赖"express": "^4.16.3"到dependencies节点下
4. 安装依赖 npm i

配置项目

1. 根目录创建app.js,初始化内容

   //导入相关模块
   const express = require("express");
   const path = require("path");
   const app = express();
   
   //请根目录创建`public`文件夹,并添加`index.html`为首页面
   app.use(express.static(path.resolve(__dirname,"public")));
   
   //================↓=↓=↓=↓=↓=配置接口信息=↓=↓=↓=↓=↓================
   app.use("/getUserInfo",require("./router/userInfo"))
   //================↑=↑=↑=↑=↑=配置接口信息=↑=↑=↑=↑=↑================
   
   const port = 3000;
   //服务监听
   app.listen(port,()=>{
       console.log(`server running @http://localhost:${port}`);
   });
   
   module.exports = app;
   

2. 根目录创建router目录,初始化内容

   //导入相关依赖
   const express = require("express");
   const router = express();
   
   //配置路由
   router.get("/",(req,res) => {
   
       //get请求参数读取
       //const shopId = req.query.shopId;
       //console.log(shopId);
   
       //组装返回数据
       let data = {
           "code":"0",
           "message":"success",
           "data":[
               {
                   "name":"张三",
               },
               {
                   "name":"李四",
               },
               {
                   "name":"王五",
               },
           ]
       };
       //发送需要返回到前端的数据
       res.send(data);
   });
   
   module.exports = router;
   

3. 复杂版POST请求

   //导入相关依赖
   const express = require("express");
   const router = express();
   let bodyParser = require('body-parser');
   let urlencoderParser = bodyParser.urlencoded({extended:false});
   
   //拼装返回数据中的部分信息
   const base_url = "http://127.0.0.1:3000/images/goods/";
   
   //配置路由
   router.post("/",urlencoderParser,(req,res) => {
       //post请求参数读取
       let shopId = req.body.shopId;
       console.log(shopId);
   
       //组装返回数据
       let goods = {
           "code":"0",
           "message":"success",
           "data":[
               {
                   "name": "法国代购新款江疏影同款翻领修身中长裙春夏印花连衣裙",
                   "image": base_url + "001/cover.jpg",
                   "presentPrice": 98.88,
                   "goodsId": "001",
                   "oriPrice": 108.88
               }, {
                   "name": "柔美而精致~高贵而优雅~圆领金银丝春季毛衣羊毛开衫女短款白外套",
                   "image": base_url + "002/cover.jpg",
                   "presentPrice": 229.90,
                   "goodsId": "002",
                   "oriPrice": 320.99
               }
           ]
       };
   
       res.send(goods);
   });
   
   //发送需要返回到前端的数据
   module.exports = router;
   

4. 访问图片http://localhost:3000/images/goods/001/1.jpg

   在public目录下增加images/goods/001目录并在001目录下添加名称为1.jpg图片