From: Phill Davies <binary011010@...>
Date: 2008-07-31T00:41:59+09:00
Subject: Re: libxml: is it possible not to use doctype declaration?

ruud grosmann wrote:
> hi Phill,
>
> I've tried it right away. I ended up with the following:
>
> XML::Parser.default_load_external_dtd = false
> XML::Parser.default_validity_checking = false
> XML::Parser.default_substitute_entities = false
>
>         parser = XML::Parser.file( file)
>         #parser.default_substitute_entities = false
>         #parser.default_load_external_dtd = false
>         #parser.default_validity_checking = false
>         doc = parser.parse
>         node = doc.find( xpath).first
>
> But the script still tries to resolve the entity. The doctype
> definition is a slightly changed real one. The message I get with the
> above code is:
>
> Operation in progress./tmp/ut21.uit:3: I/O warning : failed to load
> external entity "http://ruud.grosmann.nl/op/dtd/publicatie.dtd"
> e publicaties 1.0//NL" "http://ruud.grosmann.nl/op/dtd/publicatie.dtd"
>
> You were right that the methods are not instance methods, although I
> am not sure how to conclude that from the documentation.
>
> Did I something wrong in the script?
>
> regards, Ruud
>
> On 30/07/2008, Phill Davies <binary011010@verizon.net> wrote:
>   
>> Whoops, those were supposed to be class variables. What you really want
>> to do (I think) is more like:
>>
>> LibXML::XML::Parser.default_load_external_dtd = false
>> LibXML::XML::Parser.default_validity_checking = false
>>
>> And then:
>> parser = LibXML::XML::Parser.file(<file>)
>> doc = parser.parse
>>
>> That seems to work with your example.
>>
>> Phill Davies wrote:
>>     
>>> To start, the rdoc documentation can be found at
>>> http://libxml.rubyforge.org/rdoc/index.html. Now I don't know this for
>>> sure, but
>>>
>>> <!DOCTYPE test PUBLIC "-//FARAWAY//DTD-verweg//NL"
>>> "http://some.site.nl/dtd/test.dtd">
>>>
>>> doesn't look like a real doctype definition, so if you can pull it out
>>> of your xml (by hand, not programmatically) before trying to parse it,
>>> I'd say that would be a good idea. That being said, there are two
>>> attributes of the XML::Parser class that look like they may be of
>>> interest: default_load_external_dtd and default_validity_checking. Try
>>> setting both of those to false, unless you have a real dtd to validate
>>> against and the example above was fake. Of course, since this is using
>>> XML::Parser instead of XML::Document I think you would need to do
>>> e.g.: parser = XML::Parser.file(<file>)
>>> parser.default_load_external_dtd = false
>>> parser.default_validity_checking = false
>>> doc = parser.parse
>>>
>>> ... and then go from there.
>>> Phill D.
>>>
>>> Phlip wrote:
>>>       
>>>> ruud grosmann wrote:
>>>>
>>>>         
>>>>> Is using libxml the right thing to do to, or are there smarter
>>>>> alternatives?
>>>>>           
>>>> Libxml-ruby is the most complete & accurate parser of the big three
>>>> (REXML, Libxml-ruby, and Hpricot), and its documentation can be very
>>>> challenging. How much of the original C Libxml documentation have you
>>>> been able to read?
>>>>
>>>>
>>>>         
>>>
>>>       
>>
>>     
>
>
>   
Hey Ruud,
    Nope, I can't see that you're doing anything wrong. I guess all I 
can say is if can send the actual XML so I can give it a try with it 
(because when I use your original example it seems to work fine as long 
as I set those class variables). Also, the error message you sent was 
broken up, if you could please try to send that again it would probably 
help. Here's what I'm using:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE test PUBLIC "-//FARAWAY//DTD-verweg//NL" 
"http://some.site.nl/dtd/test.dtd">
<test>
<p>this is a test</p>
</test>

And here's the error I get when I don't set those class variables:

test.xml:2:
I/O
warning :
failed to load HTTP resource
TYPE test PUBLIC "-//FARAWAY//DTD-verweg//NL" 
"http://some.site.nl/dtd/test.dtd"

Thanks,
Phill