How can i make a local server using nodeJs?

Question

I'm trying to make a local server using nodeJs but its not working.

What is tried

var http = require('http');

http.createServer(function(req, res) {
    res.write('Hello');
    req.end();
}).listen(8080);

Answer 1

The res (which stand for response) in the callback is a Stream. After you write all you want (headers, body) to the stream, you must end it like so:

res.end();

What you have is req.end(). Using req instead of res was your error.

Also, since you only write one line in this contrived example, you could write the buffer and end the stream in one go:

const server = http.createServer(function (req, res) {
    res.end('Hello');
});

server.listen(8080);

Docs for response.end

Answer 2

Be careful when using response.end!

What is the difference between response.end() and response.send()?

response.end() will always send an HTML string, while response.send() can send any object type. For your example, both will serve the purpose since you are sending an HTML string of 'hello', but keep these cautions in mind as you proceed to build your server!

var http = require('http');

//Example with response.end()
http.createServer(function(request, response) {
    response.end('Hello');
}).listen(8080);

//Example with response.send()
http.createServer(function(request, response) {
    response.send('Hello');
}).listen(8080);

//Example with res.send() object
http.createServer(function(request, response) {
    response.send({ message: 'Hello', from: 'Happy Dev' });
}).listen(8080);