[Informa-developer] RE: Exceptions when parsing a rss feed

[Yang S. <ya...@be...>]

Hi, Niko:

  After I commented out the line you specified, it works fine for =
Tomcat.
But after I changed my web container to resin (with the patched =
informa.jar), it
cannot parse the rss feed =
(http://today.java.net/pub/q/articles_rss?x-ver=3D1.0).
The error it report like this:

/*-----------------------------------------------------------------------=
-------------
de.nava.informa.core.ParseException: ParseException: Error in building: =
http://
oday.java.net/pub/q/articles_rss?x-ver=3D1.0:256: `ü' is an unknown =
entity.
XML predefines only `<', `&', `>', `'' and  `"'. All =
other
ntities must be defined in an <!ENTITY> definition in the DTD.: =
http://today
java.net/pub/q/articles_rss?x-ver=3D1.0:256: `ü' is an unknown =
entity.  XML
redefines only `<', `&', `>', `'' and  `"'. All =
other entit
es must be defined in an <!ENTITY> definition in the DTD.
        at de.nava.informa.parsers.RSSParser.parse(RSSParser.java:118)
        at de.nava.informa.parsers.RSSParser.parse(RSSParser.java:67)
        at =
com.newsseed.retriever.RetrieverServlet.parseNewsSource(RetrieverSer
let.java:73)
        at =
com.newsseed.retriever.RetrieverServlet.service(RetrieverServlet.jav
:56)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
        at =
com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServle
.java:96)
        at =
com.caucho.server.http.Invocation.service(Invocation.java:315)
        at =
com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:
35)
        at =
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:24
)
        at =
com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java
163)
        at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
        at java.lang.Thread.run(Thread.java:534)
http://wiki.java.net/bin/view/Javapedia/WebRss?skin=3Drss

*------------------------------------------------------------------------=
-----------/

What's wrong with Informa? I guess it is xml parser's problem. Could you =
tell me
how to fix it? Thanks.

Best Regards
Yang

> -----Original Message-----
> From: Niko Schmuck [mailto:nik...@ha...]
> Sent: Tuesday, April 13, 2004 4:50 AM
> To: inf...@li...
> Cc: Yang Sun
> Subject: RE: Exceptions when parsing a rss feed
>=20
>=20
> Hi Yang,
>=20
> Thanks for taking time and reporting on this problem.=20
> Actually this is a
> problem with all feeds containing an inline entity=20
> declaration like the
> feed you tried to parse. What it does look like is:=20
>=20
> <?xml version=3D"1.0"?>
> <!DOCTYPE rdf:RDF [
>   <!ENTITY % HTMLlat1 PUBLIC
>   "-//W3C//ENTITIES Latin 1 for XHTML//EN"
>   "http://www.w3.org/TR/xhtml1/DTD/xhtml-lat1.ent">
>   %HTMLlat1;
> ]>
> [...]
>=20
> Unfortunately we use (historically) an NoOpEntity resolver to=20
> avoid loading
> referenced DTDs in an offline scenario currently, so this is=20
> where the problem
> occurs.
>=20
> > de.nava.informa.core.ParseException: ParseException: Error=20
> on line 222
> of document=20
> > http://today.java.net/pub/q/articles_rss?x-ver=3D1.0: The=20
> entity "uuml"
> was referenced, but=20
> > not declared.
> >        at=20
> de.nava.informa.parsers.RSSParser.parse(RSSParser.java:116)
> >        at de.nava.informa.parsers.RSSParser.parse(RSSParser.java:66)
>=20
> Please uncomment in the file=20
> src/de/nava/informa/parsers/RSSParser.java
> around line 109:
>=20
>  saxBuilder.setEntityResolver(new NoOpEntityResolver());
>=20
> and rebuild (simply by calling ant in the informa base=20
> directory). Please
> report if this works for you too.
> =20
> Best Regards,
> Niko
>=20
>=20
>=20