server-side browser detection? node.js
I threw this together using ua-parser-js. I'm sure it can be improved but it's functional.
Install the package:
sudo npm install ua-parser-js
In your routes file require UAParser:
var UAParser = require('ua-parser-js');
Do some stuff with it:
function ensureLatestBrowser(req, res, next) {
var parser = new UAParser();
var ua = req.headers['user-agent'];
var browserName = parser.setUA(ua).getBrowser().name;
var fullBrowserVersion = parser.setUA(ua).getBrowser().version;
var browserVersion = fullBrowserVersion.split(".",1).toString();
var browserVersionNumber = Number(browserVersion);
if (browserName == 'IE' && browserVersion <= 9)
res.redirect('/update/');
else if (browserName == 'Firefox' && browserVersion <= 24)
res.redirect('/update/');
else if (browserName == 'Chrome' && browserVersion <= 29)
res.redirect('/update/');
else if (browserName == 'Canary' && browserVersion <= 32)
res.redirect('/update/');
else if (browserName == 'Safari' && browserVersion <= 5)
res.redirect('/update/');
else if (browserName == 'Opera' && browserVersion <= 16)
res.redirect('/update/');
else
return next();
}
and then in your route just call:
app.all(/^(?!(\/update)).*$/, ensureLatestBrowser);
If you want to see what other information you can get with UAParser check out their demo page.
The ua-parser library for node (npm install ua-parser
) exposes a big set of regexes for browser user-agent strings. I'd strongly recommend it for your needs.
I wanted to do a simple redirection to a mobile version of my site, so user-agent is reliable enough. I wanted to do it server-side so I didn't waste time loading unnecessary css and js on the client. http://detectmobilebrowsers.com/ had the most robust regex to match. So I threw together some express middleware that will let you do the redirection by just adding two lines of code to your app.
npm install detectmobilebrowsers
to install
express = require 'express'
mobile = require 'detectmobilebrowsers'
app = express()
app.configure () ->
app.use mobile.redirect 'http://m.domain.com'
app.get '/', (req, res) ->
res.send 'Not on Mobile'
app.listen 3000
var ua = request.headers['user-agent'],
$ = {};
if (/mobile/i.test(ua))
$.Mobile = true;
if (/like Mac OS X/.test(ua)) {
$.iOS = /CPU( iPhone)? OS ([0-9\._]+) like Mac OS X/.exec(ua)[2].replace(/_/g, '.');
$.iPhone = /iPhone/.test(ua);
$.iPad = /iPad/.test(ua);
}
if (/Android/.test(ua))
$.Android = /Android ([0-9\.]+)[\);]/.exec(ua)[1];
if (/webOS\//.test(ua))
$.webOS = /webOS\/([0-9\.]+)[\);]/.exec(ua)[1];
if (/(Intel|PPC) Mac OS X/.test(ua))
$.Mac = /(Intel|PPC) Mac OS X ?([0-9\._]*)[\)\;]/.exec(ua)[2].replace(/_/g, '.') || true;
if (/Windows NT/.test(ua))
$.Windows = /Windows NT ([0-9\._]+)[\);]/.exec(ua)[1];
That should work for you. Just put it in your response handler.