On 24 Oct 2012, at 22:56, douglas welton wrote:
> Hi All,
>
> I am sending a NSURL, encoded as a Secure Bookmark, from the main part of my
> sandboxed application to an XPC Service that handles a specific subtask. The
> data is making it across the interface, but when I try to resolve the
> bookmark back into an NSURL, I get the following error:
>
> 10/24/12 5:15:18.908 PM com.einsteinslegacy.silica.silicaHelper: ---
> bookmark error: Error Domain=NSCocoaErrorDomain Code=259 "The file couldn’t
> be opened because it isn’t in the correct format." UserInfo=0x7faf418069a0 {}
>
> Googling the text of the error message has not lead to any useful insights.
>
> Here's what I'm doing:
>
> • When a user selects a file, I create an object containing the URL and the
> associated secure bookmark.
> • I use NSKeyedArchive to create a data object, which I then pass to the XPC
> service as a key-value pair in an xpc_dictionary.
> • The XPC service receives the message, unpacks it and calls
> NSKeyedUnarchiver to reconstitute the URL from the secure bookmark.
>
> At this point, I check the length of the bookmark data. The value matches
> the length of the originally encoded bookmark. However, when I try to
> resolve the URL using the following line of code, I get nil.
>
> self.url = [NSURL URLByResolvingBookmarkData: self.bookmark options:
> NSURLBookmarkResolutionWithSecurityScope relativeToURL: nil
> bookmarkDataIsStale: &isStale error: &bookmarkError];
>
> The entitlements file used for the XPC Service is a duplicate of the main
> application file. The XPCService dictionary in the service's info.plist has
> "JoinExistingSession" set to YES, so I assume that both parts should have the
> same set of entitlements.
>
> Are there other factors I need to consider when passing secure bookmarks?
You don’t need a security-scoped bookmark for this. Regular bookmarks carry
access to the file until the computer next reboots.
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