Efficent way of stripping a url out of a string?

**element78** · 01-01-2004

Say you have a string with the value of:

Code:

<html>
<body>
<a href=http://www.google.com/>Google</a><br>
<a href=http://www.yahoo.com/>Yahoo</a>
</body></html>

Is there any possible way of say grabbing those URLs and putting them into a listbox with Item Text as Google, and Item Data as http://www.google.com/ and so on?

I've run into a need for this several times, and never bothered to ask about it. But it sure would be nice to know.

**Brett** · 01-02-2004

There are a lot of ways to go at it, but here is one that should be fairly easy to understand:

Code:

strText = [[<html>
<body>
<a href=http://www.google.com/>Google</a><br>
<a href=http://www.yahoo.com/>Yahoo</a>
</body></html>]];

strAnchor = "<a href=";
nAnchorLength = String.Length(strAnchor);
strEndAnchor = "</a>";
nEndAnchorLength = String.Length(strEndAnchor);

nFoundPos = String.Find(strText,strAnchor,1,false);
while(nFoundPos ~= -1)do
	-- Find the end bracket...
	nEndPos = String.Find(strText,">",nFoundPos+nAnchorLength,false);
	if(nEndPos ~= -1)then
		-- OK, we have the URL...
		strURL = String.Mid(strText,nFoundPos+nAnchorLength,nEndPos-(nFoundPos+nAnchorLength));
		
		-- Now find the label...
		nEndAnchorPos = String.Find(strText,strEndAnchor,nEndPos,false);
		if(nEndAnchorPos ~= -1)then
			strLabel = String.Mid(strText,nEndPos+1,nEndAnchorPos-nEndPos-1);
			
			-- Now we have the label and URL, insert them into list box
			-- or whatever here... for illustration we will just show them
			-- in a dialog...
			Dialog.Message(strLabel,strURL);
		end
	end		
	nFoundPos = String.Find(strText,strAnchor,nFoundPos+nAnchorLength,false);
end

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