Development/Tutorials/Programming Tutorial KDE 3/KHTML

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For HTML parsing, you have the following possibilities:

  • QXML
  • QDOM
  • perl
  • khtml

Obviously, QXML and QDOM need xml-compliant html pages, and the least html pages are xml-compliant. Perl is not the scope of this site. So, this tutorial choses the khtml approach.

First step

As we remember from, biggest thing is to be able to parse non-XML-conform syntax. It works with the following program.

tags.cpp <highlightSyntax language="cpp">

  1. include <kapplication.h>
  2. include <kaboutdata.h>
  3. include <kcmdlineargs.h>
  4. include <dom/html_document.h>

int main (int argc, char *argv[]) {

       KAboutData aboutData( "test", "test",
       "1.0", "test", KAboutData::License_GPL,
       "(c) 2006" );
       KCmdLineArgs::init( argc, argv, &aboutData );
       KApplication khello;
       DOM::HTMLDocument doc;
       DOM::DOMString tag("*");
       DOM::DOMString uri("<html><body><a href=\"\"></a><a href=\"/index.php\" nowrap>Log in</a><a href=\"\"></a></body></html>");
       kdDebug() << "Does this doc have child elements ? " << doc.hasChildNodes() << endl;
       for (int i=0; i<doc.getElementsByTagName(tag).length(); i++) kdDebug() << doc.getElementsByTagName(tag).item(i).nodeName().string() << endl;
       kdDebug() << "Size of your doc " << sizeof(doc.firstChild()) << endl;
       kdDebug() << doc.isHTMLDocument() << endl;
       kdDebug() << doc.toString().string() << endl;

} </highlightSyntax>

Compile it like this:

gcc -I/usr/lib/qt3/include -I/opt/kde3/include \
-L/opt/kde3/lib -lkdeui -lkhtml -o tags tags.cpp

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