How to change the client informations in the request header (User-Agent)?

Question

I am new to the world of web development using MEAN-JS, and I am trying to create multiple iframes to show the same website for different web browsers (to see the difference between ie7 and 9 for example), so I v tried to edit my User-Agent string but this doesn’t work.

Answer 1

Yes it is possible on the server side (the E,N in MEAN-JS), and easier using the request module, you just have to specify the user agent string in the option object inside a generic route to intercept any request from your website and test if it is a request for an image (bit file) or a plain text.
You can find the user agent string that you want in this link:User Agent String.Com
Like this:

app.get('*', function (req, res){
        req.headers["user-agent"] = ‘YOUR USER AGENT STRING’;
        var options = {
            url: req.path,
            headers: {'user-agent':req.headers['user-agent'],
                        'accept':req.headers.accept,
            }
        };
        if ( /image\//.test(req.headers.accept)){
            options.encoding= null;}
        request(options, function (error, response, body) {
            if (!error && response.statusCode == 200) {
                res.set(
            response.headers

            );
                res.send(body);

            }
            else {
                console.log('request error: ' + JSON.stringify(error));
                res.redirect('/');
            }
        });
    });