SetRequestHeader not working in air app?

Question

Most of this is sample code. What I'm doing here is trying to pass the user agent http header but it is not doing the trick
I was trying this in a larger project but created a small project to test this
What are the limitations of this function?
I also tried setting cookie headers
req.setRequestHeader('Cookie', 'test=test');
but didnt have any luck
function doRequest(url) {
               var req = new XMLHttpRequest();
               req.onreadystatechange = function() {
                    if (req.readyState == 4) {
                        var str = req.responseText;
                        if (str.length > 800) {
                            str = str.substring(0, 799);
                            str += "..";
                        alert('readystate: ' + req.readyState + '\n' +
                            'status/statusText: ' + req.status + '/' +
                             req.statusText + '\n' +
                            'responseText (400 chars): '  + "\n\n" + str);
                req.open('GET', url, true);
    var agent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.3) Gecko/2008100922 Ubuntu/8.04 (hardy) Firefox/3.0.3";
        req.setRequestHeader('User-Agent', agent);
        req.send(null);           

Answer 1

Hi,
Both Header and Cookie are special headers and they can be handled separately. For other custom headers, your code should work via the req.setRequestHeader ('header_name', 'value');
For the header, please refer to this: http://help.adobe.com/en_US/AIR/1.5/devappsflex/WS5b3ccc516d4fbf351e63e3d118666ade46-7e7b. html
Basically use:
     htmlLoader.userAgent = agent;
instead of
    req.setRequestHeader('User-Agent', agent);
For cookie header, you need to instruct the htmlLoader to not handle the default cookie jar (which means sending the default cookies associated with a url). Please refer to manageCookies property: http://help.adobe.com/en_US/AIR/1.5/jslr/flash/html/HTMLLoader.html#manageCookies
You need to call this:
     htmlLoader.manageCookies = false;
before
     req.setRequestHeader('Cookie', 'test=test');
Best regards,
Dragos Georgita | Adobe AIR Engineering