How can I extract a script tag from some text using Regex?

Question

I don't know Regex very well, and I'm trying to get all of the script tags from some extracted page text. I've tried the following pattern:

<script.*?>.*?</script>

But this doesn't seem to return any script tag that has any code within it. I.e. it from the following:

<script type="text/javascript" src="Scripts/Scipt1.js"></script>
<script type="text/javascript" src="Scripts/Scipt2.js"></script>

<script type="text/javascript">
   function SomeMethod()
   {

   }
</script>

I'll only get the following results:

<script type="text/javascript" src="Scripts/Scipt1.js"></script>
<script type="text/javascript" src="Scripts/Scipt2.js"></script>

How can I return all 3? (NB. I do want to maintain the outer script tags in the results).

Answer 1

Look at the accepted answer here:

http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags

Also the 2nd answer on that page.

Also: http://stackoverflow.com/questions/590747/using-regular-expressions-to-parse-html-why-not

Answer 2

You should use the HTML Agility Pack.

For example:

var doc = new HtmlDocument();
doc.Parse(source);

var scripts = doc.DocumentNode.Descendants("script"); 

Answer 3

The . does not, by default, match newlines, so you will only get single-line results.

Use RegexOptions.Singleline to fix this. It changes the meaning of . to match any character, including the newline, so you get multi-line matches too.

Don’t get confused by the name. Also don’t confuse it with RegexOptions.Multiline, which is completely different (read the IntelliSense tooltips to find out).

Answer 4

Depending on the quality of your HTML.

var scripts = XDocument.Parse(HTMLSTRING).Descendants("SCRIPT");

Edit: Pre Xml.Linq version:

XmlDocument xDoc = new XmlDocument();
xDoc.Load(HTMLSTRING);
XmlNodeList scripts = xDoc.SelectNodes("//*/SCRIPT");

Note, both are those are untested....