Re: Best way to extract all the links from a HTML page

If you set the document base href on the page (see how BaseHrefTag handles
it in doSemanticAction, basically page.setBaseUrl (base)), then the links
you get back can be 'canonized' as you call it by using the
page getAbsoluteURL (String link, boolean strict) method.

On Tue, Oct 12, 2010 at 10:50 PM, Santiago Basulto <
[email protected]> wrote:

> Hello people.
>
> I'm starting with HTMLParser. It seems a great library. I've doing
> some benchmarking and runs really fast.
>
> Now i'm trying to improve it a little bit.
>
> In my software, i use something like this to extract all links:
>
> public class LinkVisitor extends NodeVisitor {
>        private Set<String> links = new HashSet<String>(100);
>        public LinkVisitor(){
>        }
>        public void visitTag(Tag tag) {
>                String name = tag.getTagName();
>                if ("a".equalsIgnoreCase(name)){
>                        String hrefValue = tag.getAttribute("href");
>                        links.add(tag.getAttribute("href"));
>                }
>        }
>        public Set<String> getLinks(){
>                return this.urls;
>        }
>
> }
>
> But, reading a little bit i found other classes that may help, but
> don't know how to use them. Can anyone help me out?
>
> The idea is to extract all the links from a String (that contains an
> HTML page already read from an URLConnection). Is there anyway to
> "Canonize" them? I mean, if the href says "/food/fruits/2" convert it
> to "http://www.foodsite.com/home/fruits/2"?
>
>
> Thanks a lot!
>
> --
> Santiago Basulto.-
>
>
> ------------------------------------------------------------------------------
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>

------------------------------------------------------------------------------
Beautiful is writing same markup. Internet Explorer 9 supports
standards for HTML5, CSS3, SVG 1.1,  ECMAScript5, and DOM L2 & L3.
Spend less time writing and  rewriting code and more time creating great
experiences on the web. Be a part of the beta today.
http://p.sf.net/sfu/beautyoftheweb

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