Re: [Htmlparser-user] Storing modified web pages to hard disk

[Somik R. <so...@ya...>]

Hi Chris,
    You can try this code :
    HTMLParser parser =3D new HTMLParser("http://...");
    parser.registerScanners();
    HTMLNode node;
    for (Enumeration e =3D parser.elements();e.hasMoreElements();) {
        node =3D (HTMLNode)e.nextElement();
        if (node instanceof HTMLLinkTag) {
            HTMLLinkTag linkTag =3D (HTMLLinkTag)node;
            String link =3D linkTag.getLink();
            // Now that you have the absolute link, change it the way =
you want=20
            String modifiedLink =3D modifyLink(link);
            // Output the link tag
           =20
        }   =20
        else if (node instanceof HTMLImageTag) {
            HTMLImageTag imageTag =3D (HTMLImageTag)node;
            String loc =3DimageTag.getImageLocation();
            // Now that you have the absolute link, change it the way =
you want
            String modifiedImageLoc =3D modifyImageLoc(loc);
            // Output the image tag
       =20
        }
        else {
            // This prints the html reconstruction of the node           =
 =20
            System.out.println(node.toHTML());=20
        }
    }

Note: When you are outputting the link and image tag, you will have to =
keep a few things in mind.
[1] You will need to run thru the params table inorder to accurately =
reconstruct rest of the html. This is easy, the parameters in the tags =
are in a hashtable that can be retrieved by HTMLTag.getParsed() (all =
tags derive from HTMLTag).
[2] When you are outputting the link tag, remember that links can =
contain other html elements within them. Getting all the nodes contained =
in them is easy - you can get an enumeration of link elements with =
HTMLLinkTag.nodeData()
[3] You might want to consider a second approach for uniform rendering =
of all data - since you have all the source code and are fairly sure how =
you want to render it - modify the toHTML methods of HTMLLinkTag and =
HTMLImageTag for yourself - to change it the way you want. Then, your =
application code becomes :
    HTMLParser parser =3D new HTMLParser("http://...");
    parser.registerScanners();
    HTMLNode node;
    for (Enumeration e =3D parser.elements();e.hasMoreElements();) {
        node =3D (HTMLNode)e.nextElement();
        System.out.println(node.toHTML());
    }

[4] I am strongly considering that I should allow folks to add static =
rendering handlers for the link and image tags, allowing you to change =
the default toHTML with your own code, without touching the original =
source. But you will have to wait for a later release...=20

Cheers,
Somik
  ----- Original Message -----=20
  From: Chris Carey=20
  To: htm...@li...=20
  Sent: Thursday, July 04, 2002 3:10 AM
  Subject: [Htmlparser-user] Storing modified web pages to hard disk





  I was looking for the new and improved way to do the following:

  a) Read in a page from disk or URL
  b) Modify every <A href=3D""> in the page
  c) Output the page to disk or to screen

  For example, I would just like to modify all of the <A> links or <IMG>
  links in a particular manner, but leave *most* of the page fairly
  untouched



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