Re: How to allow 'UniversalXPConnect' privilege dynamically

On 10/26/2011 11:58 AM, guido wrote:
> Hi All,
>
> I'm working on a XUL application that displays remote xul pages from a
> server.
>
> In order to avoid prompting a warning alert to the user,
> I'm giving UniversalXPConnect privilege to the default server by setting
> the following prefs on the client-side application:
remote XUL is disabled in the latest firefox releases, but there is a 
plugin that enables to whitelist a server.
i have such an application myself, but we have totake intoaccount that 
one day or another, they are going to remove the remote XUL from the 
codebase....

jef
>
> user_pref("capability.principal.codebase.p1.granted",
> "UniversalXPConnect");
> user_pref("capability.principal.codebase.p1.id",
> "http://defaultServer.com");
> user_pref("capability.principal.codebase.p1.subjectName", "");
>
> This is done at installation time by the installer and it works just fine.
>
> Now I also want to write a configuration tool (that it's again a XUL
> application) to edit the server URL. The user is asked to enter the new
> URL in a form and
> I want to give UniversalXPConnect privilege to this server as well.
>
> Here comes the issue.
> I didn't find a way to allow the privilege and the user is prompted with
> the warning dialog the first time he tries to access the new server
>
> Things I tried :
>
> 1) Using the nsIPrincipal interface but I didn't find much documentation
> about it.
> Can you provide an example of using it?
>
> 2) Editing the prefs file from my script (by using nsIPrefBranch) and
> adding the following lines
>
> user_pref("capability.principal.codebase.p2.granted",
> "UniversalXPConnect");
> user_pref("capability.principal.codebase.p2.id", "http://newServer.com");
> user_pref("capability.principal.codebase.p2.subjectName", "");
>
> but the "id" preference gets never written. Do you know why?
>
>
> Any idea how can this be solved?
>
> Many thanks,
>
> Guido.
>