javascript - set user-agent header on serving index.html, express.js -

i need set custom http 'user-agent header when i'm rendering index.html page in express.js app.

this doesn't help:

req.headers['user-agent'] = 'myheader'; 

is possible?

the user-agent header sent http client(browser) , meant read server, e.g., content negotiation. cannot set request header in response, can read. moreover, req object(incomingmessage) passed createserver() callback readable stream.

however, request can initiated customer header using:

var headers = {'user-agent': 'ryan dahl'};  http.request({hostname: 'nodejs.org', headers: headers}, function(res) {  });