get user agent from inside jade

Question

I am trying to port a script I wrote for groovy over to jade, and have run into a stumbling block

I need to access the user-agent from inside a jade file. Here is wh

Answer 1

Just write your own tiny middleware

app.use(function(req, res, next) {
  res.locals.ua = req.get('User-Agent');
  next();
});

Put this before your app.router

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());

  // here
  app.use(function(req, res, next) {
    res.locals.ua = req.get('User-Agent');
    next();
  });

  app.use(app.router);
  app.use(express.static(path.join(__dirname, 'public')));
});

Then you can use the ua variable in any jade template (for example index.jade)

extends layout

block content
  h1= title
  p Welcome to #{title}
  p=ua

Answer 2

You can pass user-agent from express to jade : (see here)

app.get('/index', function(req, res){
    res.render('home.jade', {
    locals: {
            useragent: req.getHeader('User-Agent')
            }
    });
    res.end();
});

in your jade file

html
  body
    h1 #{useragent}
script(type='text/javascript')
  var useragent = #{useragent};