Re: [Htmlparser-user] Dealing with *repeated* EncodingChangeException

[Antony S. <ant...@gm...>]

Hi Subramanya,

My solution to the same problem is

                   Parser parser =3D new Parser(urlOb.openConnection());
                   NodeList nl =3D null;
                   for (int i =3D 0; i < 4; i++) { // 4 decoding tries max
                        try {
                            nl =3D parser.parse(null);
                        } catch (EncodingChangeException e) {
                            String s =3D parser.getEncoding(); // use
detected encoding
                            log.fine("restarting parse with " + s + "
for " + url);
                            continue;
                        }
                        break;
                    }

If yours is better I'd like to use it.  I hope someone who knows
better can tell. I am sort of stuck doing bunch of other things at
this time and not paying attention to this particular issue.

Is mine buggy cause I don't call reset ?

-Antony Sequeira


> Code snippet below:
> ---------------------------------------------------------------------
>    private static void IgnoreCharSetChanges(Parser p)
>    {
>       PrototypicalNodeFactory factory =3D new PrototypicalNodeFactory ();
>       factory.unregisterTag(new MetaTag());
>          // Unregister meta tag so that char set changes are ignored!
>       p.setNodeFactory (factory);
>    }
>
>    private static String ParseNow(Parser p, MyVisitor visitor) throws org=
.htmlparser.util.ParserException
>    {
>       try {
>          System.out.println("START encoding is " + p.getEncoding());
>          p.visitAllNodesWith(visitor);
>       }
>       catch (org.htmlparser.util.EncodingChangeException e) {
>          try {
>             System.out.println("Caught you! CURRENT encoding is " + p.get=
Encoding());
>             visitor.Init();
>             p.reset();
>             p.visitAllNodesWith(visitor);
>          }
>          catch (org.htmlparser.util.EncodingChangeException e2) {
>             System.out.println("CURRENT encoding is " + p.getEncoding());
>             System.out.println("--- CAUGHT you yet again! IGNORE meta tag=
s now! ---");
>             visitor.Init();
>             p.reset();
>             IgnoreCharSetChanges(p);
>             p.visitAllNodesWith(visitor);
>          }
>       }
>       System.out.println("ENCODING IS " + p.getEncoding());
>       return p.getEncoding();
>    }
> ---------------------------------------------------------------------
>
> If, in future versions of HTMLParser, the MetaTag class starts doing othe=
r
> important things in future besides setting text encoding, then, a new cla=
ss
> could be derived from the existing MetaTag class whose "doSemanticAction(=
)"
> code simply ignores char set changes for "content-type" meta tags and
> calls super.doSemanticAction for others ...
>
> If there are gotchas in this technique, I would appreciate feedback on
> that front too!
>
> Thanks,
>
> Best,
> Subbu.
>
>
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