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[presentation-api] Pull Request: Reorder start steps to create session only when needed

From: François Daoust via GitHub <sysbot+gh@w3.org>
Date: Mon, 14 Sep 2015 09:29:40 +0000
To: public-secondscreen@w3.org
Message-ID: <pull_request.opened-44909179-1442222978-sysbot+gh@w3.org>
tidoust has just submitted a new pull request for 
https://github.com/w3c/presentation-api:

== Reorder start steps to create session only when needed ==
As things stood, the steps to "start a presentation session" required 
the UA to create a valid presentation session identifier before 
creating the task C to navigate the receiving browser context.

However, the presentation session identifier will only be added to the
 set of presentations when C completes. If the user calls "start" 
again in the meantime, a UA that would generate the same valid 
presentation session identifier for the second presentation session 
would correctly follow these steps (that identifier would not yet be 
in the set of presentations), but this would create two 
PresentationSession with the same identifier.

Also, the new PresentationSession S is actually not needed until C 
completes successfully.

This commit moves the creation of the presentation session identifier 
and of the presentation session itself to the steps that run when C 
completes successfully.

See https://github.com/w3c/presentation-api/pull/192
Received on Monday, 14 September 2015 09:29:42 UTC

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