Ember.JS: How to handle invalid URLs

There’s a lot of documentation for the new Ember Router. However, I found that no one was talking about how to handle the “*” route in Ember, i.e. the routes that don’t match anything.

I first tried to look at the ApplicationRoute but that didn’t seem to throw anything. Ember just sits there with a lovely blank page!

 

ApplicationRoute { 
events: {
errors: function(reason, transition) {
console.log("never happened");
}
}
}

So here’s the easiest solution for handling bad urls. My router looks like this now:

App.Router.map( function() {

this.route('login');
this.resource('companies', {path: 'companies'});
this.resource('company', {path: 'companies/:company_nice_url'}, function() {
this.route('members');

});



this.route('bad_url', { path: '/*badurl' }); // Catch everything else!

});

The last route named “bad_url” will catch all the other unrecognized URLs and direct the user to the App.BadUrlRoute where you can handle them. You will get the URL segment as params.bad_url for you to inspect and offer friendly advice like “hey did you mistype companies?”.

If you simply want to show a page that says “There’s no one here you fool!”, just create a handlebars template:

<script type="text/x-handlebars" data-template-name="bad-url">
<h1>There’s no one here you fool!!!!</h1>
</script>

And you’re done! Any path that doesn’t match your routes will get routed through ‘bad-url’, where you can act on it accordingly.

 

EDIT ON 6TH AUGUST

Marcus in the comments pointed out to me that using path: '/*badurl'  is better due to this handling "/this/is/wrong/path" situations. My initial solution to using a dynamic segment (:bad_url) did not catch this. Thanks to all the commenters!

 

EDIT ON 7TH AUGUST

I have realised that having "*badurl" instead of ":bad_url" has one caveat. I am implementing a funky search route that deals with all URLs past a base route like this: /search/x/y/z/a/b/c . Having the astriks to catch all the bad url's makes it impossible to have a search router which deals with "/search/*search_terms". So there you go... ups and downs to both methods. More on that awesome search route another day... :)

 

How is Facebook Chat Heads possible on Android?

This has been the question since the day I saw Facebook unveil the new Facebook Home suite of apps. Workmate of mine (_) might have found the answer on good-ol' StackOverflow!

http://stackoverflow.com/questions/13346111/draw-overlay-in-android-system-wide

Basically, you are able to spawn a service which draws directly on to the Android System's WindowManager by adding a new subview on top of everything. It requires some special Android permissions that the user can agree to during the install. Code example on the link.

Can't help but deeply appreciate the flexibility of Android.