What makes a URL Handler be persistent?
What makes a URL Handler be persistent?
- Subject: What makes a URL Handler be persistent?
- From: Jerry Krinock <email@hidden>
- Date: Wed, 14 Nov 2012 16:48:07 -0800
Normally, if a URL-handling app is not running, and user visits a URL with that app's scheme, Mac OS X launches the app. My app's URL handler only works when my app is running. That's not so bad, but I have one user reporting that it *never* works. I presume the issues are related and need to understand what's going on.
If I "visit" a URL with my app's scheme in Safari, while my app is *not* running, Safari displays a page saying "Safari can't open … because OS X doesn't recognize internet addresses starting with <myUrlScheme>".
I understand that registered URL schemes are persisted in Launch Services plist files. When I run this command…
defaults read com.apple.LaunchServices LSHandlers | grep LSHandlerURLScheme
I get about 20 URL schemes: http, https, mailto, github-mac, etc., including some targeting apps that I haven't used in years. But my app's url scheme *never* shows up in there. Why not?
Now, my app itself does not handle the URL directly. The URL handler is actually installed in a faceless helper app which is in the main app's Contents/Helpers/ directory. (This was done so I could control whether or not my app is activated.) Here is the code:
NSAppleEventManager *appleEventManager = [NSAppleEventManager sharedAppleEventManager] ;
[appleEventManager setEventHandler:self
andSelector:@selector(handleGetURLEvent:withReplyEvent:)
forEventClass:kInternetEventClass
andEventID:kAEGetURL] ;
Also, the trouble started with this particular user when he installed an update in which I had changed the *name* of the helper. So I was wondering if maybe Launch Services still had the old name, but that's when I found out that in fact it had neither.
Why might my URL handler not be persistent?
Thanks,
Jerry Krinock
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