Re: Route HANGS processing XML with external DOCTYPE declaration

[Claus Ibsen <cl...@gmail.com>]

Hi

I logged a ticket about this to not forget
https://issues.apache.org/jira/browse/CAMEL-6897

Seems useful especially if you want to make sure the server dont try
to load external resources such as a DTD file.

On Wed, Sep 18, 2013 at 4:06 PM, Claus Ibsen <cl...@gmail.com> wrote:
> Hi Dale
>
> Sounds like a good idea to have a way of configuring this easily in Camel.
> Feel free to log a JIRA and attach your code.
>
> Though wonder also how we can make it easier to set any other custom
> features as well.
>
>
>
> On Wed, Sep 18, 2013 at 3:54 PM, Dale King <da...@gmail.com> wrote:
>> I've used xpath routes previously and had no problem. I tried doing a split
>> with xpath on an XHTML document however and the route just hangs. It
>> doesn't throw an exception or simply fail to find a match for the XPath, it
>> just hangs.
>>
>> After 4-5 hours of debugging the issue, I have discovered it is because the
>> XHTML contains an external DTD declaration (a DOCTYPE) as it should. When
>> converting the XML content to a DOM it tries to load the external DTD which
>> never completes, causing the route to hang.
>>
>> The solution I have found is to add the following class and declare it as a
>> bean in the Spring configuration and Spring will autowire it into the
>> XmlConverter, but I would be interested in knowing anything better to avoid
>> the lockup:
>>
>> @SuppressWarnings("restriction")
>> public class NoExternalDtdDocumentBuilderFactory extends
>> DocumentBuilderFactoryImpl
>>  {
>>     public NoExternalDtdDocumentBuilderFactory() throws
>> ParserConfigurationException
>>     {
>>         setValidating(false);
>>         setNamespaceAware(true);
>>         setFeature("http://xml.org/sax/features/namespaces", false);
>>         setFeature("http://xml.org/sax/features/validation", false);
>>         setFeature("
>> http://apache.org/xml/features/nonvalidating/load-dtd-grammar", false);
>>         setFeature("
>> http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
>>     }
>> }
>>
>>
>> --
>> Dale King
>
>
>
> --
> Claus Ibsen
> -----------------
> Red Hat, Inc.
> Email: cibsen@redhat.com
> Twitter: davsclaus
> Blog: http://davsclaus.com
> Author of Camel in Action: http://www.manning.com/ibsen



-- 
Claus Ibsen
-----------------
Red Hat, Inc.
Email: cibsen@redhat.com
Twitter: davsclaus
Blog: http://davsclaus.com
Author of Camel in Action: http://www.manning.com/ibsen