[David Bremner] Re: RFC: drop html tags

[David Bremner] Re: RFC: drop html tags

[David Bremner]

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From: David Bremner <david@tethera.net>
To: Steven Allen <steven@stebalien.com>
Subject: Re: RFC: drop html tags
Date: Tue, 21 Mar 2017 14:03:10 -0300
Message-ID: <87zigepnox.fsf@tesseract.cs.unb.ca>

Steven Allen <steven@stebalien.com> writes:

> David Bremner <david@tethera.net> writes:
>> Although HTML itself is not regular (probably not anything sane in the
>> latest incarnations), well formed tags should be as far as I know.
>> Here is a simple fix to the problem of giant embedded images in HTML:
>> drop all tags.  Unbalanced < > could force an HTML part not to be
>> indexed.
>
> What about attribute values?
>
>     <input value="a<b">
>
> Contrary to a lot of misinformation on the web, I'm pretty sure this is
> perfectly legal in HTML (not XML).
>
> Docs: https://www.w3.org/TR/html5/syntax.html#attributes-0
>
> In the JavaScript regex format, I believe the correct way to parse this is:
>
>     /<("[^"]*"|'[^']*'|[^"'>]*)*>/g
>
> Basically, while inside a tag, ignore everything between double and single quotes.

Thanks for the reality check. It should be possible to handle quotes. In
my limited understanding of that regex, we can do a bit better by
forcing pairs of quotes to match, since I <chaos attribute="'"> is
probably legal.

Cheers,

d

Re: [David Bremner] Re: RFC: drop html tags

[David Bremner]

David Bremner <david@tethera.net> writes:

> From: David Bremner <david@tethera.net>
> Subject: Re: RFC: drop html tags
> To: Steven Allen <steven@stebalien.com>
> Date: Tue, 21 Mar 2017 14:03:10 -0300
>
> Steven Allen <steven@stebalien.com> writes:
>
>> In the JavaScript regex format, I believe the correct way to parse this is:
>>
>>     /<("[^"]*"|'[^']*'|[^"'>]*)*>/g
>>
>> Basically, while inside a tag, ignore everything between double and single quotes.
>
> Thanks for the reality check. It should be possible to handle quotes. In
> my limited understanding of that regex, we can do a bit better by
> forcing pairs of quotes to match, since I <chaos attribute="'"> is
> probably legal.

Actually, I'm wrong. My eyes just glaze over when faced with any
non-trivial regex, I guess.

d