htmlparser-user

[Htmlparser-user] regarding using not filter

[Srikrishna S. <swa...@gm...>]

hi,
my name is srikrishna,i am a college student.
i am quiet new to html parser.
i am trying to use html parser to filter out certain tags in a html page.
with not filter i am able take out tags like script,img.
but the problem is that the tags are removed only if they outside any other
tags.
eg:if there is an img tag inside an table or td tag,the img tag is not
removed.
i dont want to remove the table or td tag,but i want to remove the
img,script tags inside the table tags.
the initial code i wrote was:

String[]arr=3Dnew
String[]{"img","input","br","span","script","noscript","b","a href",};
   try{

             Parser parser =3D new Parser ();
             parser.setURL ("targetin.html");
             NodeList n =3D parser.parse(null);
             NodeFilter filter1 =3D null;
             NotFilter filter2 =3D null;
             for(int i=3D0;i<arr.length;i++){
              filter1 =3D new TagNameFilter (arr[i]);
              filter2 =3D new NotFilter(filter1);
              n =3D n.extractAllNodesThatMatch(filter2);
             }
             String s1=3Dn.toHtml();
 This code removes all tags,outside table,tr,td tags.but if they are inside
a table tag,it is not able to do it.

Re: [Htmlparser-user] regarding using not filter

[Derrick O. <Der...@Ro...>]

The filter isn't going to re-arrange your page for you.
The best you can do is get the list of tags and then remove them from 
their parent's child list:

for (int i=0; i < arr.length; i++)
{
    filter1 = new TagNameFilter (arr[i]);
    filter2 = new NotFilter (filter1);
    NodeList x = n.extractAllNodesThatMatch (filter2);
    for (int j = 0; j < x.Length; j++)
    {
        Node tag = x.elementAt (j);
        tag.getParent ().getChildren ().remove (tag);
    }
}

or something like that. No guarantees about removing something that's 
already been removed though.


Srikrishna Swaminathan wrote:

> hi,
> my name is srikrishna,i am a college student.
> i am quiet new to html parser.
> i am trying to use html parser to filter out certain tags in a html page.
> with not filter i am able take out tags like script,img.
> but the problem is that the tags are removed only if they outside any 
> other tags.
> eg:if there is an img tag inside an table or td tag,the img tag is not 
> removed.
> i dont want to remove the table or td tag,but i want to remove the 
> img,script tags inside the table tags.
> the initial code i wrote was:
>
> String[]arr=new 
> String[]{"img","input","br","span","script","noscript","b","a href",};
>    try{
>
>              Parser parser = new Parser ();
>              parser.setURL ("targetin.html");
>              NodeList n = parser.parse(null);
>              NodeFilter filter1 = null;
>              NotFilter filter2 = null;
>              for(int i=0;i<arr.length;i++){
>               filter1 = new TagNameFilter (arr[i]);
>               filter2 = new NotFilter(filter1);
>               n = n.extractAllNodesThatMatch(filter2);
>              }
>              String s1=n.toHtml();
>
>  This code removes all tags,outside table,tr,td tags.but if they are 
> inside a table tag,it is not able to do it.