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Re: revoking permission after granting permission

From: Steve Block <steveblock@google.com>
Date: Thu, 10 Nov 2011 10:46:54 +0000
Message-ID: <CAFun1dob4MgV48H_Y0Y_9rmiYzJSwNGFwEvPjuP2r9YPPwW1+g@mail.gmail.com>
To: Simon Pieters <simonp@opera.com>
Cc: public-geolocation@w3.org
Hi Simon,

Thanks for the comment. I think you might be misinterpreting the spec.

> I think getCurrentPosition should only invoke at most one callback, either
> success or error.
That is already the case. The text you quote means that if the user
denies permission, the error callback must be called with code
PERMISSION_DENIED, as opposed to with any other error code, even if
other errors were encountered during the algorithm above. In all
cases, the error callback is invoked at most once. The text is
'overriding' the algorithm, because we don't include the permission
acquisition process in the algorithm itself.

For both getCurrentPosition() and watchPosition(), the spec considers
the acquisition of permission to be a one-time, single event, per
method call. Any caching of user permissions is left up to the UA.

You're right that the spec does not say anything about what to do if a
permission is cached by the UA but then changed by the user while a
call to getcurrentPosition() or watchPosition() is in progress. Your
suggestion of stopping a watch seems reasonable, but I don't think
it's necessary to include this in the spec.

Thanks,
Steve
Received on Thursday, 10 November 2011 10:47:23 GMT

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