返回 MOCK 后响应的节点 JSON-Server

Question

我正在尝试使用https://www.npmjs.com/package/json-server作为模拟后端，我能够匹配 get 的 URL，但如何为 POST 调用返回一些模拟响应。

就像创建用户 URL 一样

 URL - http://localhost:4000/user 
 Method - POST
 Request Data - {name:"abc", "address":"sample address"}

 expected response - 
 httpStats Code - 200, 
 Response Data - {"message":"user-created", "user-id":"sample-user-id"}

在某些情况下，我还想发送自定义 http 代码，例如 500,423,404,401 等，具体取决于某些数据。

最大的问题是我的代码没有返回任何 POST 响应，它只在 JSON 中插入记录

Answer 1

默认情况下，通过 json-server 的 POST 请求应给出 201 创建的响应。

如果您需要自定义响应处理，您可能需要一个中间件来获取 req 和 res 对象。

在这里，我添加了一个中间件来拦截 POST 请求并发送自定义响应。您可以根据您的具体情况进行调整。

// Custom middleware to access POST methods.
// Can be customized for other HTTP method as well.
server.use((req, res, next) => {
  console.log("POST request listener");
  const body = req.body;
  console.log(body);
  if (req.method === "POST") {
    // If the method is a POST echo back the name from request body
    res.json({ message:"User created successfully", name: req.body.name});
  }else{
      //Not a post request. Let db.json handle it
      next();
  }  
});

完整代码（index.js）..

const jsonServer = require("json-server");
const server = jsonServer.create();
const router = jsonServer.router("db.json");
const middlewares = jsonServer.defaults();

server.use(jsonServer.bodyParser);
server.use(middlewares);


// Custom middleware to access POST methids.
// Can be customized for other HTTP method as well.
server.use((req, res, next) => {
  console.log("POST request listener");
  const body = req.body;
  console.log(body);
  if (req.method === "POST") {
    // If the method is a POST echo back the name from request body
    res.json({ message:"User created successfully", name: req.body.name});
  }else{
      //Not a post request. Let db.json handle it
      next();
  }  
});

server.use(router);

server.listen(3000, () => {
  console.log("JSON Server is running");
});

你可以使用以下命令启动 json-servernode index.js