Question

I’m trying to send chunks of data from many different servers my app is on, to mine.
Using some dummy image source, passing my data as a GET query. (img.gif?aaa=xxx&bb=yyy…)
the Query is many times too long and gets cut.

is there some better way for me to send the data cross-browser?

Answer 1

It would be the best if you used POST method when sending the data.

 var msgSender = new ActiveXObject("Microsoft.XMLHTTP"); 
 msgSender.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
 msgSender.setRequestHeader("Encoding", "Windows-1257")     
 msgSender.open("POST", "http://yourderver/page" ,true);
 msgSender.onreadystatechange = function(){...};
 var msg = "your very long message goes here";

 //preparing post data
 var strToSend = "someotherarg=somevalue" + username;
     strToSend+= "&msg=" + msg;
 strToSend = escape(strToSend);
 msgSender.send(strToSend);

The solution is even easier, if you use jQuery – just call $.post() method: http://docs.jquery.com/Ajax/jQuery.post

EDIT:
However, this will not work cross-domain, unless you specify ‘Access-Control’ headers on your server and the clients have modern enouhg browsers (FireFox 3.5+ etc)

So, another solution is to include a hidden IFRAME in your page (the page lives on your server then) which contains a form and you call Submit() of that form to POST the data.