Re: [xml] Error on parsing HTML with libxml
That would be incorrect behavior for libxml2 -- as Liam and I both said -- you
have to encode some how. CDATA is one way and URL encoding (e.g. , ,
etc).
I sent you a link.
https://stackoverflow.com/questions/1398571/html-inside-xml-should-i-use-cdata-or-encode-the-html
Which I believe is the correct answer. If someone else is making the XML then
they should fix it. I also like the "soup" answer and agree.
We have people send invalid XML to our customers all the time ... my customers
have chosen to make me fix it :-) . That is what I get paid for so ...
We pre-process all XML files and fix every mistake we know (and the program
slowly grows) before parsing it. Examples include attributes without a space
between the quote and start of next attribute. It would be wrong for me to ask
libxml2 to do this -- not on spec. So I do it.
So if was you and you have you take the files like this -- then pre-process
them and fix them with either CDATA or encoding because I don't think anyone
else would support the kind of change you are asking for ...
Eric
Eric S Eberhard
VICS (Vertical Integrated Computer Systems)
Voice: 928 567 3529
Cell: 928 301 7537 (not reliable except for text or if not home)
2933 W Middle Verde Rd
Camp Verde, AZ 86322
-Original Message-
From: xml [mailto:xml-boun...@gnome.org] On Behalf Of André Rothe
Sent: Monday, August 20, 2018 12:48 AM
To: xml@gnome.org; Liam R. E. Quin
Subject: Re: [xml] Error on parsing HTML with libxml
I can't chage the source of the HTML page, because the page will be generated
by another system, where I don't have access. I get only the pages from there
and our Apache module makes a post-processing step just before the pages will
be sent to the user's browser. And there I need a parser to change something
within the page.
So I think, the libxml should not parse the content of inline scripts to handle
that.
There is also a comment on
https://stackoverflow.com/questions/51892455/php-5-4-16-domdocument-removes-parts-of-javascript
which describes your idea with CDATA, but it didn't work.
~André
On 18.08.2018 04:13, Liam R. E. Quin wrote:
> On Fri, 2018-08-17 at 14:42 +0200, André Rothe wrote:
>>
>> https://3v4l.org/O0iEf
>
> Try changing
> ...writeln('');
> to
> ...writeln('<' + '/td>');
> and see if that helps; or use a CDATA section, <![CDATA[
> //..
> ]]> to escape the markup from the HTML parser.
> Although it may depend on what the missing //... lines look like,
> assuming this is not the complete source.
>
> Better yet, don't use document.write at all, and switch to more modern
> practices :)
>
> I'm not sure there's actually a bug here; if you feed the parser tag
> soup, expect a mess. Keep zPHP, JavaScript, HTML, CSS in separate
> files and life will probably be simpler.
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Re: [xml] Error on parsing HTML with libxml
I have looked into the libxml code and I found the method
htmlParseScript() within HTMLParser.c.
https://gitlab.gnome.org/GNOME/libxml2/blob/master/HTMLparser.c
It describes the problem with the "<" character within scripts.
But it offers the possibility to use the recover mode to ignore
the tags.
I have used
xmllint --html -htmlout --recover mypage.html
and it returns the last tag. The PHP equivalent does not work
(there is a flag "recover" on class DOMDocument, but the output is
always the same). So I will look into the DOMDocument code (if it is
available).
~André
On 18.08.2018 00:33, Eric S Eberhard wrote:
> I could be way off base -- don't you have to encode the portions in the js?
> Otherwise I can see it being confused. The js looks like data and it can't
> have < or > in it.
>
> https://stackoverflow.com/questions/1398571/html-inside-xml-should-i-use-cdata-or-encode-the-html
>
> Eric
>
>
> Eric S Eberhard
> VICS (Vertical Integrated Computer Systems)
> Voice: 928 567 3529
> Cell: 928 301 7537 (not reliable except for text or if not home)
> 2933 W Middle Verde Rd
> Camp Verde, AZ 86322
>
>
> -Original Message-
> From: xml [mailto:xml-boun...@gnome.org] On Behalf Of André Rothe
> Sent: Friday, August 17, 2018 5:43 AM
> To: xml@gnome.org
> Subject: [xml] Error on parsing HTML with libxml
>
> Hi,
>
> I run into an HTML parser problem during PHP development. There is a class
> DOMDocument, which uses libxml2 to parse HTML and XML documents. I found out,
> that there is a problem with HTML documents, which have inline Javascript
> code, which uses HTML tags within Javascript String variables.
>
> There is a little code example, which shows the problem:
>
> https://3v4l.org/O0iEf
>
> As you can see there, the last tag is lost within the output.
> Exactly the same error I will get with xmllint:
>
> xmllint --html --htmlout /tmp/page.html
>
> where page.html contains the HTML part of the example code above. The output
> is
>
> page.html:11: HTML parser error : Unexpected end tag : td
> printwin.document.writeln('');
>
> and within the output, the String will be empty:
>
> printwin.document.writeln('');
>
> So I think, that the PHP error comes from the error within libxml2. I use
> libxml2 version 2.9.1.
>
> Is it possible to fix that or is it already fixed within a newer version?
>
> Best regards
> André
>
> ___
> xml mailing list, project page http://xmlsoft.org/ xml@gnome.org
> https://mail.gnome.org/mailman/listinfo/xml
>
>
___
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Re: [xml] Error on parsing HTML with libxml
I can't chage the source of the HTML page, because the page will be
generated by another system, where I don't have access. I get only the
pages from there and our Apache module makes a post-processing step just
before the pages will be sent to the user's browser. And there I need a
parser to change something within the page.
So I think, the libxml should not parse the content of inline scripts to
handle that.
There is also a comment on
https://stackoverflow.com/questions/51892455/php-5-4-16-domdocument-removes-parts-of-javascript
which describes your idea with CDATA, but it didn't work.
~André
On 18.08.2018 04:13, Liam R. E. Quin wrote:
> On Fri, 2018-08-17 at 14:42 +0200, André Rothe wrote:
>>
>> https://3v4l.org/O0iEf
>
> Try changing
> ...writeln('');
> to
> ...writeln('<' + '/td>');
> and see if that helps; or use a CDATA section,
> //..
> ]]> to escape the markup from the HTML parser.
> Although it may depend on what the missing //... lines look like,
> assuming this is not the complete source.
>
> Better yet, don't use document.write at all, and switch to more modern
> practices :)
>
> I'm not sure there's actually a bug here; if you feed the parser tag
> soup, expect a mess. Keep zPHP, JavaScript, HTML, CSS in separate files
> and life will probably be simpler.
___
xml mailing list, project page http://xmlsoft.org/
xml@gnome.org
https://mail.gnome.org/mailman/listinfo/xml
Re: [xml] Error on parsing HTML with libxml
On Fri, 2018-08-17 at 14:42 +0200, André Rothe wrote:
>
> https://3v4l.org/O0iEf
Try changing
...writeln('');
to
...writeln('<' + '/td>');
and see if that helps; or use a CDATA section,
to escape the markup from the HTML parser.
Although it may depend on what the missing //... lines look like,
assuming this is not the complete source.
Better yet, don't use document.write at all, and switch to more modern
practices :)
I'm not sure there's actually a bug here; if you feed the parser tag
soup, expect a mess. Keep zPHP, JavaScript, HTML, CSS in separate files
and life will probably be simpler.
Liam
--
Liam Quin - web slave for https://www.fromoldbooks.org/
with fabulous vintage art and fascinating texts to read.
___
xml mailing list, project page http://xmlsoft.org/
xml@gnome.org
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Re: [xml] Error on parsing HTML with libxml
I could be way off base -- don't you have to encode the portions in the js?
Otherwise I can see it being confused. The js looks like data and it can't
have < or > in it.
https://stackoverflow.com/questions/1398571/html-inside-xml-should-i-use-cdata-or-encode-the-html
Eric
Eric S Eberhard
VICS (Vertical Integrated Computer Systems)
Voice: 928 567 3529
Cell: 928 301 7537 (not reliable except for text or if not home)
2933 W Middle Verde Rd
Camp Verde, AZ 86322
-Original Message-
From: xml [mailto:xml-boun...@gnome.org] On Behalf Of André Rothe
Sent: Friday, August 17, 2018 5:43 AM
To: xml@gnome.org
Subject: [xml] Error on parsing HTML with libxml
Hi,
I run into an HTML parser problem during PHP development. There is a class
DOMDocument, which uses libxml2 to parse HTML and XML documents. I found out,
that there is a problem with HTML documents, which have inline Javascript code,
which uses HTML tags within Javascript String variables.
There is a little code example, which shows the problem:
https://3v4l.org/O0iEf
As you can see there, the last tag is lost within the output.
Exactly the same error I will get with xmllint:
xmllint --html --htmlout /tmp/page.html
where page.html contains the HTML part of the example code above. The output is
page.html:11: HTML parser error : Unexpected end tag : td
printwin.document.writeln('');
and within the output, the String will be empty:
printwin.document.writeln('');
So I think, that the PHP error comes from the error within libxml2. I use
libxml2 version 2.9.1.
Is it possible to fix that or is it already fixed within a newer version?
Best regards
André
___
xml mailing list, project page http://xmlsoft.org/ xml@gnome.org
https://mail.gnome.org/mailman/listinfo/xml
___
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xml@gnome.org
https://mail.gnome.org/mailman/listinfo/xml
