XMLHttpRequest and subdomains

[korg]

I had just gotten subdomains to work (username.domain.com) and then realized my Ajax scripts weren't doing that good anymore.

I read that XMLHttpRequest can't access other domains, but shouldn't there be a simple(r) way to make it work with subdomains?

I'm pretty much a javascript newbie but decent with PHP.

Is there a painless way to make this all work again? Or any other way?

Here's a bit of the code;

var cururl = 'http://domain.com/';
 
function createRequestObject() {
	var req;
 
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		alert('Problem creating the XMLHttpRequest object');
	}
 
	return req;
}
 
function handleDivTag(divtag) {
	var divtag;
	return divtag;
}
 
var http = createRequestObject();
var divhandler = new handleDivTag(null);
 
function sendRequest(ua_id,show,series) {
	http.open('get', cururl+'status.php?ua_id='+ua_id+'&show='+show+'&series='+series+'&dummy=' + new Date().getTime());
	http.onreadystatechange = handleResponseTwo;
	divhandler.divtag = ua_id;
	http.send(null);
}
 
function handleResponseTwo() {
	if (http.readyState == 4 && http.status == 200) {
		var response = http.responseText;
		if (response) {
			document.getElementById('editinfo'+divhandler.divtag).innerHTML = response;
		}
	}
}

[Dan Grossman]

Can you make your script accessible from the subdomains (a symlink on the file system perhaps)? That'd be the easiest way, since the cross-site scripting restrictions are imposed by the browsers, which are out of our control.

[korg]

Would you please give a bit more info on how I could use that, I looked it up and I guess it's not as easy as just writing symlink(http://domain.com,currentuser.domain.com) in the PHP file where the the sendRequest() links are located? I guess I can't use absoulte paths in symlink tho. And these are wilcard subdomains, so they aren't connected to a specific folder on the server, if I have understood everthing right that is...

I'm on regular webhosting so I don't think I have the rights to go very deep in the configuration.

I also tried do solve this with htaccess which I read about in an article;

RewriteRule ^/call/(.*)$ http://domain.com/$1 [P]

Placing the status.php file (which is called by the .js file in my first post) in the /call/ directory. Didn't work tho...

[korg]

If I understand symlink correctly, it's something which is just created after having run the command?

Would something like this work perhaps?

symlink( "./",
        "/home/web2753/domains/domain.com/public_html/"); 

I don't really know what to write instead of "./" because the subdomains are wildcard. Don't know if anything bad will happen if I make some wrong moves, as I'm not very skilled with SSL or whatever might be required to remove the symlinks!

Do you know if symlink is a method which can make this all work? I couldn't really find anything useful when I googled on it (and xmlhttprequest). I've only found methods which seemed to require a lot of rewriting and adding of new javascripts, curl and what not And the above RewriteRule which failed and also ProxyPass which seem to require httpd.conf access.

I can understand that fetching from other domains/sites should be quite tricky, but I'm leeching off of myself here, so to speak Well, maybe I should just stop whining and drop the subdomains idea, not vital but would probably be an appreciated feature.

[Dan Grossman]

I was referring to creating a symlink on the file system, not any PHP code, and not anything specific to XMLHttpRequest. A symbolic link is like creating a virtual file which is updated whenever the original changes. By creating a symlink to this script you're accessing in each subdomain's directory on the file system, it'd be accessible at an address under the subdomain, so that your XMLHttpRequest can hit a copy on the same domain as the javascript is running, avoiding domain restrictions.

Look up "ln -s".

[korg]

Ah, I see..

Ok, so I tried a couple of ln -s'es but I can't figure out where to create this symlink. As I don't really have any directories (they are wildcard subdomains).

Tried this for example;

ln -s /home/web2753/domains/domain.com/public_html/ajax/status.php

(changed the status.php to /ajax/ directory first)

This created a symlink for status.php in he same directory as /domain.com/ lies in, and also did the same in the /domain.com/public_html/ directory. This was probably wrong but...

I also tried setup a directory called /test/ in /public_html/, did the above symlink in /test/, and then tried while entering test.domain.com, but that didn't work either.