Question

我正在使用带有电子邮件和密码的JSON数据从Postman发出POST请求，但是当我试图在Postman的响应窗口中显示该消息时，它什么也没显示。

似乎POST请求未随请求发送JSON数据，否则在访问请求数据时我可能出了点问题。

这是我的代码：

    const express = require("express");
    const app = express();

    const database = {
      users: [
        {
          id: "1234",
          name: "john",
          email: "john@gmail.com",
          password: "john",
          entries: 0,
          joined: new Date()
        },
        {
          id: "123",
          name: "sally",
          email: "sally@gmail.com",
          password: "sally",
          entries: 0,
          joined: new Date()
        }
      ]
    };

    app.get("/", (req, res) => {
      res.send("This is working Get");
    });

    app.post("/signin", (req, res) => {
      res.json(req.body);
    });

    app.listen(3000, () => {
      console.log("Server Started at port number 3000");
    });

Answer 1

第1步： 如果您使用raw(application/json)进行请求，则需要在npm下安装该应用，以解析您的请求数据，

npm install body-parser --save

请检查下面的链接以获取更多信息：

https://www.npmjs.com/package/body-parser

第2步：：您需要在服务器文件中添加以下行

var bodyParser = require("body-parser");
app.use(bodyParser.urlencoded({
    extended: false
}));
app.use(bodyParser.json())

第3步：：集成bodyParser后，您可以使用req.body

访问请求数据

您在这里用解决方案进行编码：

var express = require("express");
var bodyParser = require("body-parser");

var app = express();

const database = {
    users: [{
            id: "1234",
            name: "john",
            email: "john@gmail.com",
            password: "john",
            entries: 0,
            joined: new Date()
        },
        {
            id: "123",
            name: "sally",
            email: "sally@gmail.com",
            password: "sally",
            entries: 0,
            joined: new Date()
        }
    ]
};

app.use(bodyParser.urlencoded({
    extended: false
}));
app.use(bodyParser.json())

app.post("/signin", (req, res) => {
    res.json(req.body);
});

app.listen(8080, () => {
    console.log("Server has been started");
});

Answer 2

与express一起，您需要'body-parser'模块才能执行邮寄请求，


 const express = require("express");
    const app = express();
    const bodyParser = require('body-parser');
    app.use(bodyParser.urlencoded({ extended: true }));
    app.use(bodyParser.json());
    app.use(bodyParser.raw());
    const database = {
      users: [
        {
          id: "1234",
          name: "john",
          email: "john@gmail.com",
          password: "john",
          entries: 0,
          joined: new Date()
        },
        {
          id: "123",
          name: "sally",
          email: "sally@gmail.com",
          password: "sally",
          entries: 0,
          joined: new Date()
        }
      ]
    };

    app.get("/", (req, res) => {
      res.send("This is working Get");
    });

    app.post("/signin", (req, res) => {
      res.json(req.body);
    });

    app.listen(3000, () => {
      console.log("Server Started at port number 3000");
    });

通过POST请求传递JSON数据后，无法从Postman获得响应响应

2 个答案: