ansaurus

Question

Sending big data to server, Cross-Domain

Answer 1

A:

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.

naivists 2010-01-21 09:16:35

hidden iframe? and how would the data go to iframe if the query is too long? anyway, that would be 2 HTTP requests each time...

vsync 2010-01-21 10:31:07

If the iframe is from your domain, you can access its DOM using javascript! `document.getElementById("yourframe").document.forms[0].submit()` etc!

naivists 2010-01-21 10:36:10

I know, but as I said already, the data is crossed-domain. this is it. iframe trick won't help a bit..

vsync 2010-01-21 12:18:38

It is not a problem to submit a normal HTML form to a different domain than yours! Or... don't I get the problem?

naivists 2010-01-21 12:45:06

so why did you said in your edit "the page lives on your server "... I like your iframe idea :)

vsync 2010-01-21 13:42:01

I said it because - if you had your "base page" on `http://server1` and made an `<iframe src='http://server2'>`, then you could not access the iframe from javaScript due to cross-domain restrictions

naivists 2010-01-21 14:00:37

Answer 2

A:

Split your payload (e.g. at 1024 bytes), then send using several GET requests.

Piskvor 2010-01-21 09:23:41

That's what I thought doing, although it seems a bit of an ugly solution to me :/

vsync 2010-01-21 10:32:11

Ugly indeed; but with AJAX POST, the [Same Origin Policy][1] will block you; and although [RFC2616][2] says "The HTTP protocol does not place any a priori limit on the length of a URI", [some user agents][3] are pretty sure that 2083 bytes ought to be enough for everybody. [1]: http://en.wikipedia.org/wiki/Same_origin_policy [2]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.2.1 [3]: http://support.microsoft.com/kb/208427

Piskvor 2010-01-21 11:47:26

ansaurus

tags:

views:

answers:

Sending big data to server, Cross-Domain

related questions