Apple has invented an Internet protocol named "itms" ("iTunes Music Store") so folks can put links on their web pages and clicking on those links automatically launches iTunes to the specified URL.

While the links themselves are wrapped in JavaScript to attempt verify that they'll work first, a typical link resolves to something that looks like this:

<itms://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=80616768&amp;s=143441&amp;ign-mscache=1>

It appears that the iTunes installer registers the itms protocol when it's installed (prefab on OS X and using the Registry on Windows).

It would be helpful to have a similar behavior for our own apps, the ability to have links on our site to stack files which launch our own standalone to run them.

I've noticed that when using simple http links the user is asked (in FF and IE, anyway) whether they want to download the file or open it with a specific app, and they can specify your standalone and in some versions even check a box to always take that action when handling files of that type.

But that's a lot to ask of users.

I understand the security implications of having such setup happen automatically, but it sure would be convenient.

How does iTunes register its itms protocol, and can we do the same for our own apps? Or is there a way to set up a Helper app to always handle files of a specific type?

I don't think it's too much to ask if such installation requires admin permissions, but it would be very handy to have some way to do this.

Any clues?

--
 Richard Gaskin
 Fourth World
 Revolution training and consulting: http://www.fourthworld.com
 Webzine for Rev developers: http://www.revjournal.com
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