W3C home > Mailing lists > Public > public-html@w3.org > June 2010

Re: text/sandboxed-html

From: Maciej Stachowiak <mjs@apple.com>
Date: Thu, 10 Jun 2010 12:05:16 -0700
Cc: public-html@w3.org, Leonard Rosenthol <lrosenth@adobe.com>, Adam Barth <w3c@adambarth.com>, Ian Hickson <ian@hixie.ch>
Message-id: <19E4C63E-938D-4DC2-8523-F89B9B25CECF@apple.com>
To: Artur Adib <arturadib@gmail.com>

On Jun 3, 2010, at 8:55 AM, Artur Adib wrote:

> Maciej Stachowiak wrote:
>> I would be hesitant to add a feature to HTML5 that can't actually be
>> implemented (and will be a potentially confusing no-op) until another
>> standards group does some design work. It's not even clear at this
>> time if this is a feature authors will really want with sandboxed
>> iframes.
> I wanted to revive this discussion, as I seem to be precisely such an author.
> We're developing an app that shows arbitrary 3rd-party content through
> iframes.  We're primarily interested in @sandbox to forbid top-level
> navigation;  everything else, from scripts to forms and plugins, we're
> OK with.
> So the only missing option for us is "allow-plugins".  (Right now, our
> users can't see embedded plugin videos from such sandboxed sites,
> which is a major setback for us).
> In our experience with tons of external sites, most top-level
> navigation is done by Javascript code, and not by plugins.  So even if
> the plugin APIs are not yet fully compatible with a sandboxed
> environment, having the "allow-plugins" option would be extremely
> helpful to us.
> Is there a major drawback in offering this white-list option?  It
> seems to me that, provided developers are warned about the inherent
> dangers of allowing plugins in the HTML5 specs, there's no harm in
> adding this option;  if you're not willing to take the risk, simply
> don't use it.
> Any thoughts?

If allow-plugins is implemented in a simpleminded way, then it will be very easy to use plugins to circumvent the restriction on top-level navigation. Are you looking to strictly prevent top-level navigation, or just to make sites' existing top-level navigation less likely to work?


Received on Thursday, 10 June 2010 19:05:49 UTC

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