Make iframe parsing configurable [rt.cpan.org #46099]

Migrated from rt.cpan.org#46099 (status was 'open')

Requestors:

• bdfoy@cpan.org

From bdfoy@cpan.org on 2009-05-15 06:15:45
:

Since the latest versions of HMTL::Parser do not parse the content of
iframes, some of my applications using HTML::SimpleLinkExtor have
broken. The text between the iframe tags is what the browser displays
and is usually more HTML, and I need to be able to extract any links in
that text.

I'd like to at least be able to turn on parsing for iframes, even if it
is off by default.

From gaas@cpan.org on 2009-06-20 09:17:40
:

On Fri May 15 02:15:45 2009, BDFOY wrote:
> Since the latest versions of HMTL::Parser do not parse the content of
> iframes, some of my applications using HTML::SimpleLinkExtor have
> broken. The text between the iframe tags is what the browser displays
> and is usually more HTML, and I need to be able to extract any links in
> that text.

Browsers that support iframes are supposed to ignore everything inside the iframe.  They are 
supposed to render the HTML found at the 'src' location.

> I'd like to at least be able to turn on parsing for iframes, even if it
> is off by default.

I see the point if you need to emulate the behaviour of very old browsers.

A workaround is to invoke a subparser on the iframe content text.  I'll see if I find an easier 
way to do this.

From gaas@cpan.org on 2009-06-20 09:24:09
:

The TODO file has this entry:

- make literal tags configurable.  The current list is hardcoded to be "script", "style", "title", 
"iframe", "textarea", "xmp",  and "plaintext".

which would be my preferred way to fix this.

From jwilliams@cpan.org on 2011-09-20 17:20:09
:

Making literal tags configurable would also be useful for those doing
javascript templates with <script type="text/html"> tags.

From andrew@pimlott.net on 2012-10-17 22:22:02
:

On Sat Jun 20 05:17:40 2009, GAAS wrote:
> > I'd like to at least be able to turn on parsing for iframes, even if
> it
> > is off by default.
> 
> I see the point if you need to emulate the behaviour of very old
> browsers.

What is the point of not parsing the content of iframes?  I can't find 
any justification, and it seems at odds both with the spec and user 
expectations.  Removing this special case would make HTML::Parser simpler 
and more uniform.

Andrew

From gaas@cpan.org on 2012-10-18 22:09:53
:

I explained the point just above the text you quoted. What's "the spec" you'r
refering to?

Start with the TODO file entry about making literal tags configurable, then inspect how HTML::Parser currently handles iframe and the other listed literal tags. Clarify whether the intended result is configurable parsing or removal of the iframe special case, and verify the chosen behavior with parser tests.