[webkit-dev] localStorage quota limit

Michael Nordman michaeln at google.com
Wed Dec 2 12:06:39 PST 2009

Arguably, seems like a bug that invalid string values are let thru the door
to start with?

Since users can't effectively store invalid UTF16 character sequences in FF
or IE, is there really any downside to using UTF8 text encoding in WebKit?
@Jeremy, this isn't a matter of letting users choose the text encoding, this
is entirely an implementation detail of WebStorage.

* The code change to get UTF8 by default in new databases, tiny.
* Migrating pre-existing databases to the new encoding. Somewhat of a
hassle. But maybe doesn't need to be done, pre-existing files could continue
to use UTF16, while newly created dbs could use UTF8 (the text encoding is
chosen at database creation time and stuck that way forever thereafter).
* Its possible that some app is already depending on the ability to store
invalid character sequences (on the iPhone say), and this would be a
breaking change for that app.

The preload everything characteristic is a separate issue altogether.

On Wed, Dec 2, 2009 at 11:15 AM, Jeremy Orlow <jorlow at chromium.org> wrote:

> IE chokes ("invalid procedure call or argument") and Firefox mangles the
> data for LocalStorage (but works fine for SessionStorage).
> On Wed, Dec 2, 2009 at 10:54 AM, Darin Adler <darin at apple.com> wrote:
>> On Dec 2, 2009, at 10:48 AM, Jeremy Orlow wrote:
>> > How can you construct invalid UTF-16 sequences?
>> http://unicode.org/faq/utf_bom.html#utf16-7
>>    -- Darin
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