Returns HTTP response header.
var value = obj.getResponseHeader(name);
obj.setResponseHeader(name, value);
name (string) - header name
value (string) - header value
var req = new AW.HTTP.Request;
req.setURL('<url>');
req.response = function(data){
alert(this.getResponseHeader('Content-Type')); // show content type
}
req.request();