browser_fingerprint

This module attempts to uniquely identify browsers by examining their header and connection information. This information can be used as a "poor-man's" session identifier in your node projects. This module can optionally set a cookie to 'lock' in a consistent fingerprint.

Resuming sessions require that either the cookie be returned to the server, or a x-header x-__browserFingerprint in the default case, be sent on subsequent requests

	var http = require('http');
	var bf = require('browser_fingerprint');

	// these are the default options
	var options = {
		cookieKey: "__browserFingerprint",
		toSetCookie: true,
		onlyStaticElements: false,
		settings: {
	    path: '/',
	    expires: 3600000,
	  }
	};

	http.createServer(function (req, res) {
		bf.fingerprint(req, options, function(fingerprint, elementHash, cookieHash){
			
			cookieHash['Content-Type'] = 'text/plain' // append any other headers you want
			res.writeHead(200, cookieHash);
			
			var resp = "";
			resp += 'Your Browser Fingerprint: ' + fingerprint + "\r\n\r\n";
			for(var i in elementHash){
				resp += "Element " + i + ": " + elementHash[i] + "\r\n";
			}
			
			res.end(resp);
			
			console.log('request from ' + req.connection.remoteAddress + ', fingerprint -> ' + fingerprint);
		});
	}).listen(8080, '127.0.0.1');

	console.log('Server running at http://127.0.0.1:8080/' + '\r\n');