trying to remove javascript contents with script tags?

[steve labar]

I'm trying to remove the javascript stuff withing the script tags in an html file. I'm having no problem removing the script tags and all the stuff inside. However, i'd like to leave the script tags and just remove the the javascript inside them. I have tried taking group(1) which is the contents and running replace(group(1),"") but it was not working consistently. The matcher.replaceall works very good but i have the darn script tags in my matcher. I thought making the script tags in non captured groups would help so i could then call matcher.replaceall but they are still in match.

Any ideas?

 	public String removeJavascript(String response)
	{
		String result ="";
        //
		regex.buildRegEx("(?i)(?:<[ \n\r]*script[^>]*>)(.*?)(?:<[ \n\r]*/script[^>]*>)",Pattern.DOTALL|Pattern.MULTILINE);
		Matcher m1 = regex.getMatcher(response);
		if(m1.find())
		{
		  System.out.println(m1.group());
          response = m1.replaceAll("");
		}
  
		
		return response;
	}
		   

[Sebastian Janisch]

I think there is no need to use regular expressions in this case. Unnecessary overhead.

StringBuilder sb = new StringBuilder(text);

int start = sb.indexOf("<script");
start = sb.indexOf(">", start) + 1;

int end = sb.indexIf("</script>", start);

sb.delete(start, end);

[steve labar]

what if there is multiple scripts? in the file this only would get the first occurrence. So, you think using java regex is costly time wise.

[Sebastian Janisch]

The regex engine is pretty heavy weight, so I tend to avoid it whenever possible.

As for your question, yes it only strips out the first occurance.

But you can simply loop over it until sb.indexOf("<script") is -1.