Comments on: Cross Domain XHR with Firefox

By: Zach Leatherman

Zach Leatherman — Tue, 12 Aug 2008 13:19:10 +0000

Never say die.

http://developer.mozilla.org/en/docs/Cross-Site_XMLHttpRequest

Looks like you could make a plugin that enables this for the web :) Have at it!

By: Sean

Sean — Tue, 12 Aug 2008 12:31:42 +0000

I’ve read that the above technique will not work under Firefox 3. My tests seem to confirm this. And, there’s this thread:

http://groups.google.com/group/mozilla.dev.apps.firefox/browse_thread/thread/0b3db90e1b452f33/d4fd6124df529739

So, is it game over?

By: mark

mark — Wed, 09 Jul 2008 18:46:07 +0000

hi board!

y have this error,
Permiso para obtener la propiedad Element.childNodes denegado

in english
Permission denied to get property Element.childNodes

and i create prefs.js file, and i have this error yet… i am using V 3.0

tks for u help.

By: Zach Leatherman

Zach Leatherman — Wed, 18 Jun 2008 23:24:27 +0000

Sure, this method is a client-side only solution. It’s fairly trivial (and common) to use a server side language to act as a proxy for your ajax calls.

By: Arian Hojat

Arian Hojat — Wed, 18 Jun 2008 15:37:01 +0000

Heard this was a viable production solution:
use php to pull the xml, and feed it into the javascript.

http://www.phpfour.com/blog/2008/03/06/cross-domain-ajax-using-php/

By: Zach Leatherman

Zach Leatherman — Sat, 10 May 2008 19:10:07 +0000

Also, please keep in mind that this is NOT a production solution. It’s a development solution for individual development machines.

By: Zach Leatherman

Zach Leatherman — Sat, 10 May 2008 04:25:00 +0000

Dude, what?

To me that says:
I can parse an XML document.
OR if I can’t, try a new way.

That doesn’t have anything to do with XHR, other than supplying using it to supply an XML document.

By: Jeremy

Jeremy — Fri, 09 May 2008 23:58:20 +0000

If you want to ensure that what you are developing works for other users who will not want to do this to their firefox use this:

try{
// IE understands this
var xml = $(response.responseXML)
var codes = xml.documentElement.getElementsByTagName(”code”)
}catch(e){
//firefox understands this
try{
var xml = (new DOMParser()).parseFromString( response.responseXML, “text/xml”);
var codes = xml.documentElement.getElementsByTagName(”code”)
}catch(ee){
}
}

By: Christian Fecteau

Christian Fecteau — Sat, 16 Feb 2008 03:54:28 +0000

Problem solved. A Firefox search engine xml file has been made for this dictionnary (and more):
http://www.cnrtl.fr/portail/#footerright

By: Christian Fecteau

Christian Fecteau — Sun, 10 Feb 2008 22:30:19 +0000

Shaun or Zach, how would I do the same for UniversalXPConnect? I’m trying to make myself a Firefox favelet that would search this French dictionnary automatically with my clipboard text:
http://atilf.atilf.fr/dendien/scripts/tlfiv4/showps.exe?p=combi.htm

I’m so close but I’m still getting this error:
uncaught exception: Un script de « http://atilf.atilf.fr » s’est vu refuser des privilèges UniversalXPConnect.

I’ve tried these with no luck in user.js:
user_pref("capability.principal.codebase.p0.granted", "UniversalXPConnect"); user_pref("capability.principal.codebase.p0.id", "http://atilf.atilf.fr"); user_pref("capability.principal.codebase.p0.subjectName", "");


user_pref("capability.principal.codebase.p1.granted", "UniversalXPConnect");

user_pref("capability.principal.codebase.p1.id", "http://dell");

user_pref("capability.principal.codebase.p1.subjectName", "");
user_pref("capability.policy.policynames", "allowclipboard");

user_pref("capability.policy.allowclipboard.sites", "file:// http://dell http://atilf.atilf.fr“);

user_pref(”capability.policy.allowclipboard.Clipboard.cutcopy”, “allAccess”);

user_pref(”capability.policy.allowclipboard.Clipboard.paste”, “allAccess”);

/* user_pref(”capability.policy.allowclipboard.UniversalXPConnect.QueryInterface”, “allAccess”); user_pref(”capability.policy.allowclipboard.UniversalXPConnect.createInstance”, “allAccess”); user_pref(”capability.policy.allowclipboard.UniversalXPConnect.equals”, “allAccess”); user_pref(”capability.policy.allowclipboard.UniversalXPConnect.getService”, “allAccess”); user_pref(”capability.policy.allowclipboard.UniversalXPConnect.initialize”, “allAccess”); */

and my favelet:
function getClipboardText() {


	if (window.clipboardData) // IE

		return (window.clipboardData.getData('Text'));
	if (!window.netscape) // promt for text if not Mozilla

		return prompt();
	// ask permission to Mozilla

	netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
	// go on with XUL code

	var	clip = Components

			.classes['@mozilla.org/widget/clipboard;1']

			.createInstance(Components.interfaces.nsIClipboard),

		trans = Components

				.classes['@mozilla.org/widget/transferable;1']

				.createInstance(Components.interfaces.nsITransferable),

		str = {},

		len = {};
	trans.addDataFlavor('text/unicode');

	clip.getData(trans, clip.kGlobalClipboard);

	trans.getTransferData('text/unicode', str, len);
	str =	Components.interfaces.nsISupportsWString

		? str.value.QueryInterface(Components.interfaces.nsISupportsWString)

		: str.value.QueryInterface(Components.interfaces.nsISupportsString);
	return(str.data.substring(0, len.value / 2));

}
var clip = getClipboardText();
console.log(clip);
//document.form1.elements.mot.value = clip;

//verif1();

Thanks for the XHR code. I’ve added it to my FF dev profile. Now I can code cross-domain ajax.