Re: ChangedCharSetException from HTMLEditorKit.Parser

[John caron]

 
 I am trying to use the javax.swing.text.html.HTMLEditorKit.Parser to
 parse some web pages (using code from Elliotte Harold's "Java Network
 Programming" 2nd ed (oreilly).
 
 I gets javax.swing.text.ChangedCharSetException on most pages because
 (it seems) Netscape Composer embeds this in each page:
 
 head
meta http-equiv="Content-Type" content="text/html;
 charset=iso-8859-1"
meta name="GENERATOR" content="Mozilla/4.76 [en] (Windows NT 5.0; U)
 [Netscape]"
meta name="Author" content="John Caron"
titleGDV WebStart/title
 /head
 
 and it seems that "text/html; charset=iso-8859-1" always causes an
 Exception.
 


Here's a brute-force workaround for this kind of problem, i just remove the offending 
lines before parsing the HTML. If anyone has more info on what 
HTMLEditorKit.ParserCallback can and cant do, or better ways to parse HTML, please 
post.

...
baseURL = new URL(urlName);
InputStream in = baseURL.openStream();
InputStreamReader r = new InputStreamReader(filterTag(in));
HTMLEditorKit.ParserCallback callback = new MyCallerBacker();
parser.parse(r, callback, false);
...

 // workaround for HTMLEditorKit.Parser, cant deal with "content-encoding"
  private InputStream filterTag(InputStream in) throws IOException {
DataInputStream dins = new DataInputStream( in);
ByteArrayOutputStream bos = new ByteArrayOutputStream(1);

DataInputStream din =  new DataInputStream(new BufferedInputStream(in));
while (din.available()  0) {
  String line = din.readLine();
  String lline = line.toLowerCase();
  if (0 = lline.indexOf("meta "))  // skip meta tags
continue;
  //System.out.println("--"+line);
  bos.write( line.getBytes());
}
din.close();

return new ByteArrayInputStream( bos.toByteArray());
  }

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super layout manager help

[Steve Barrett]

Attached is source for a layout manager I am working
on.  Its intended to be fairly simply to use and very
extensible.  My approach was to write a layout manager
than can handle all kinds of customized constraint
objects.  I want to provide a useful set of constraint
objects to go with it.  I've only written three so
far.
It's not even beta, but I would appreciate testing,
suggestions, etc.
SO any help would be appreciated.  
Thanks in advance, Steve Barrett

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