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Re: File API "oneTimeOnly" is too poorly defined

From: Glenn Maynard <glenn@zewt.org>
Date: Fri, 30 Mar 2012 08:21:09 -0500
Message-ID: <CABirCh84ue83WUmRLQ-3CnM185_MhzKM4jrAd6mS9myz6tmTmQ@mail.gmail.com>
To: Bronislav Klučka <Bronislav.Klucka@bauglir.com>
Cc: public-webapps@w3.org
2012/3/29 Bronislav Klučka <Bronislav.Klucka@bauglir.com>

> If I understand you, you find it problematic that by using weak ref, URL
> would for some time reference actual Blob and other time it would not?

The problem is that the following code might or might not work, depending
on the behavior of the browser's GC:

url = createObjectURL(blob);
blob = null;
setTimeout(function() { img.src = url; }, 0);

If the timer executes before GC collects the blob, this works, because the
URL is still valid.  Otherwise, it fails, because--since the Blob no longer
exists--the URL is no longer valid.

Glenn Maynard
Received on Friday, 30 March 2012 13:21:59 UTC

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