旧版本的Express使用app.use(Express .json())或bodyParser.json()阅读更多关于bodyParser中间件的信息

在最新版本的express中，我们可以简单地使用res.json()

const express = require('express'),
    port = process.env.port || 3000,
    app = express()

app.get('/', (req, res) => res.json({key: "value"}))

app.listen(port, () => console.log(`Server start at ${port}`))

您可以使用管道和许多处理器中的一个来美化它。你的应用应该总是响应尽可能小的负载。

$ curl -i -X GET http://echo.jsontest.com/key/value/anotherKey/anotherValue | underscore print

https://github.com/ddopson/underscore-cli

如果你正在使用Express，你可以使用这个:

res.setHeader('Content-Type', 'application/json');
res.send(JSON.stringify({key:"value"}));

或者只是这样

res.json({key:"value"});

以下是解决方案:

//Here, JSON object is doc  
const M={"First Name":doc.First_Name,
          "Last Name":doc.Last_Name,
          "Doctor's Email":doc.Email,
          "Doctors Picture Link":doc.Image};
   res.write(JSON.stringify(M,null,10)+"\n");
   res.end();

其他渲染对象的方法

console.log(doc);
res.json(doc);
//Here,M is referred from the above code it is contains doc Object
res.send(M);

我是如何获得对象使用猫鼬:

//Here, Handles contains my MongoDB Schema.
const NN=Handles.findOne().lean().exec(function(err, doc) {
console.log(doc);
});

你可以为此创建一个helper:创建一个helper函数，这样你就可以在应用程序的任何地方使用它

function getStandardResponse(status,message,data){
    return {
        status: status,
        message : message,
        data : data
     }
}

这是我的主题路线，我试图得到所有的主题

router.get('/', async (req, res) => {
    const topics = await Topic.find().sort('name');
    return res.json(getStandardResponse(true, "", topics));
});

我们得到的回应

{
"status": true,
"message": "",
"data": [
    {
        "description": "sqswqswqs",
        "timestamp": "2019-11-29T12:46:21.633Z",
        "_id": "5de1131d8f7be5395080f7b9",
        "name": "topics test xqxq",
        "thumbnail": "waterfall-or-agile-inforgraphics-thumbnail-1575031579309.jpg",
        "category_id": "5de0fe0b4f76c22ebce2b70a",
        "__v": 0
    },
    {
        "description": "sqswqswqs",
        "timestamp": "2019-11-29T12:50:35.627Z",
        "_id": "5de1141bc902041b58377218",
        "name": "topics test xqxq",
        "thumbnail": "waterfall-or-agile-inforgraphics-thumbnail-1575031835605.jpg",
        "category_id": "5de0fe0b4f76c22ebce2b70a",
        "__v": 0
    },
    {
        "description": " ",
        "timestamp": "2019-11-30T06:51:18.936Z",
        "_id": "5de211665c3f2c26c00fe64f",
        "name": "topics test xqxq",
        "thumbnail": "waterfall-or-agile-inforgraphics-thumbnail-1575096678917.jpg",
        "category_id": "5de0fe0b4f76c22ebce2b70a",
        "__v": 0
    },
    {
        "description": "null",
        "timestamp": "2019-11-30T06:51:41.060Z",
        "_id": "5de2117d5c3f2c26c00fe650",
        "name": "topics test xqxq",
        "thumbnail": "waterfall-or-agile-inforgraphics-thumbnail-1575096701051.jpg",
        "category_id": "5de0fe0b4f76c22ebce2b70a",
        "__v": 0
    },
    {
        "description": "swqdwqd wwwwdwq",
        "timestamp": "2019-11-30T07:05:22.398Z",
        "_id": "5de214b2964be62d78358f87",
        "name": "topics test xqxq",
        "thumbnail": "waterfall-or-agile-inforgraphics-thumbnail-1575097522372.jpg",
        "category_id": "5de0fe0b4f76c22ebce2b70a",
        "__v": 0
    },
    {
        "description": "swqdwqd wwwwdwq",
        "timestamp": "2019-11-30T07:36:48.894Z",
        "_id": "5de21c1006f2b81790276f6a",
        "name": "topics test xqxq",
        "thumbnail": "waterfall-or-agile-inforgraphics-thumbnail-1575099408870.jpg",
        "category_id": "5de0fe0b4f76c22ebce2b70a",
        "__v": 0
    }
      ]
}

旧版本的Express使用app.use(Express .json())或bodyParser.json()阅读更多关于bodyParser中间件的信息

在最新版本的express中，我们可以简单地使用res.json()

const express = require('express'),
    port = process.env.port || 3000,
    app = express()

app.get('/', (req, res) => res.json({key: "value"}))

app.listen(port, () => console.log(`Server start at ${port}`))