localhost doesn't output the JSON for Router and controller i used

Question

I have just started to learn NodeJS and I am stuck with this. I am trying to handle the request. The localhost keeps loading or throws an error

cannot GET/

The JSON code needs to be displayed on my localhost site. What changes to routes or controllers should I make?

Here is the app.js file that calls the router to handle the request.

app.js

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

const Postroutes=require('./routes/post');

app.use("/" , Postroutes);

const port=8000;
app.listen(port, ()=>{
    console.log(`a node js api is listening on port ${port}`);
});

the routes will forward the request to the controller.

routes/post.js


const express= require("express")
const PostController=require('../controllers/post')

const router=express.Router()

router.get("/",PostController.getPosts);

module.exports= router;

The controller will respond with the JSON.

controllers/post.js

exports.getPosts= (req,res)=>{
    res.json=({
        posts:
            [
                {title:"First Post"},
                {title:"Second Post"}

            ]
    });
};

score 1 · Answer 1 · edited Dec 21 '19 at 06:46

1

In controllers/post.js

Try res.json({...}); instead res.json=({...});

edited Dec 21 '19 at 06:46

Sandeep Kumar

1,707
4
21
31

answered Dec 21 '19 at 05:20

lolmc

11
2

score 1 · Answer 2 · answered Dec 21 '19 at 05:53

1

This can be use inside your controllers/post.js

exports.getPosts= (req,res)=>{
    const json = {
        posts:
            [
                {title:"First Post"},
                {title:"Second Post"}

            ]
    };
    res.send(json);
};

Or use res.json({ ... }) as per @lolmc answer.

More about response for different format -> Express API Ref

answered Dec 21 '19 at 05:53

Abhishek

362
1
5

I get this error: = throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn)) What does this mean? @Sandeep Kumar – aswathsrimari Dec 21 '19 at 09:43

score 0 · Answer 3 · answered Dec 21 '19 at 20:28

As both Abhishek and lolmc mentioned res.json({...}) should do the trick. res is an object with methods. These methods responds to the HTTP request.

res is short for response. e.g. res.json({ message: 'This is a test message.' }) to reply to a HTTP request with json.

See this post on stackoverflow where Dave Ward explains req and res and read the docs for res and the docs for req to learn more.

localhost doesn't output the JSON for Router and controller i used

3 Answers3