casperjs user-agent example

asperjs-useragent-test.js

var casper = require('casper').create();

var webpage = "http://wordpress.org/";

casper.on('resource.requested', function(resource) {

    for (var obj in resource.headers) {
        var name = resource.headers[obj].name;
        var value = resource.headers[obj].value;
        if (name == "User-Agent"){
            this.echo(value);
        }
    }

});


casper.start();

casper.userAgent('Mozilla/5.0 (Macintosh; Intel Mac OS X)');

casper.thenOpen('http://google.com/', function() {
    this.echo("I'm a Mac.");
});

this.userAgent('Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)');

this.thenOpen('http://google.com/', function() {
    this.echo("I'm a PC.");
});


casper.run();

/*
//OUTPUT: does not work, last user-agent string used for both runs
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
I'm a Mac.
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
I'm a PC.
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
*/

Blog post about this gist: http://techslides.com/using-casperjs-to-make-multibrowser-screenshots/

You have to put your stuff in .then() blocks then you can change the userAgent on the fly