[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Cross-domain loading of XML
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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