In a simple nodejs http server all the request headers in are available on .headers on http.IncomingMessage object. So if you want to get any header value you can do
requestObj.headers.HEADER_NAME
so if you want to get host, you can use
var server = require('http').createServer(function(req, res) {
// get request header
var host = req.headers.host;
req.write('<h1>Hello World :: ' + host +' </h1>');
res.end();
});
var port = process.env.PORT || 9001;
server.listen(port);
server.on('listening', function(){
console.log('Listening to ', port);
});
And if you want to set an header for your response, you can use setHeader method on http.ServerResponse object.
var server = require('http').createServer(function(req, res) {
var headerStr =JSON.stringify(req.headers);
// set response header
res.setHeader('content-type', 'application/json');
res.write(headerStr);
res.end();
});
var port = process.env.PORT || 9001;
server.listen(port);
server.on('listening', function(){
console.log('Listening to ', port);
});
Please note that, you want to make sure that you set the header before sending first byte of response.
Thank You.