[Javascript] Ajax & proxy question

[scott at randomchaos.com (Scott Reynen)]

On Jan 12, 2007, at 10:42 AM, Matt Murphy wrote:

> our company has a proxy server. Whenever I use an ajax script to  
> request something from the server, if it's going through the proxy  
> it fails. I'm trying to figure out if the HTTPRequest method is a  
> standard port 80 HTTP request to the server? and back? It seems  
> like it is, and therefore should work through the proxy just fine.
>
> Any clues as to what's going on?
>
> If my ajax function does all the screen updating on the client  
> side, and just sends stuff back to the server to update the db, no  
> problem. But if I need to eval some code back from the server, no  
> luck.

You can't do cross-domain AJAX.  XMLHttpRequests can only be made to  
the domain (and subdomain and port) initiating the request.  So if  
your AJAX request is going through a proxy, your HTML page making the  
request needs to be loading through the same proxy.

Peace,
Scott