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Re: Cross-domain loading of XML

  • From: Olivier Rossel <olivier.rossel@gmail.com>
  • To: Mike Sokolov <sokolov@ifactory.com>
  • Date: Wed, 8 Dec 2010 15:35:00 +0100

Re:  Cross-domain loading of XML
All these web developpers' tricks are a poor man's version of XInclude.
Please, XML guys, implement and promote XInclude !!!!

On Wed, Dec 8, 2010 at 3:21 PM, Mike Sokolov <sokolov@ifactory.com> wrote:
> This article gives a pretty good explanation:
> http://www.ibm.com/developerworks/library/wa-aj-jsonp1/
> The gist is that XMLHttpRequest is limited to same-domain urls.
> However there is a workaround for JSON (they call it JSONP) that uses the
> ability to load javascript dynamically from another domain.  Essentially, it
> seems you can bypass the cross-domain restriction by this trick:
> var script = document.createElement('script');
> script.setAttribute('src', url);
> Apparently in this instance url doesn't have to be a url on the same domain.
> I don't see why this couldn't be used to insert any sort of data at all, but
> it does rely on javascript.
> -Mike
> On 12/08/2010 08:08 AM, Elliotte Rusty Harold wrote:
>> On Tue, Dec 7, 2010 at 7:15 PM, Rob Koberg<rob@koberg.com>  wrote:
>>> First thing: Get the browser builders to allow cross domain loading of
>>> XML. Without that you might as just bang your head on a post. (even
>>> with that, you will just be banging your head on a padded post)
>> Just want to double check this. JSON can be loaded cross-domain and
>> XML can't, right? I.e. I can eval JSON from an arbitrary host in my
>> browser-based JavaScript and I can't load XML using XmlHTTPRequest
>> unless it comes from the same host? Or is it more subtle than that? If
>> so, is there a detailed analysis somewhere of exactly under what
>> conditions I can load JSON from where and how?
>> Googling around I see some blog posts, but no detailed analysis.
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