how-to-set-response-header-in-http-server.md

How to set response header in HTTP server

const http = require('http');

const server = http.createServer((req, res) => {
  res.setHeader('Content-Type', 'text/plain')
  res.end();
});

server.listen(82, '127.0.0.1');

• require('http') - import module to work with http protocol
• http.createServer - creates HTTP server
• (req, - object with request data
• res - object to manage response
• .end( - finished http response with given content
• .setHeader( - sets response header
• Content-Type - name of the header to send
• text/plain - value of the header to send

group: http_server

Example:

curl -i http://127.0.0.1:82/

HTTP/1.1 200 OK
Content-Type: text/plain
Date: Thu, 04 Aug 2022 12:33:39 GMT
Connection: keep-alive
Keep-Alive: timeout=5
Content-Length: 0