Monday, November 08, 2010 at 12:07 AM.

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system.verbs.builtins.xml.getHtmlLinks

on getHtmlLinks (urlHtml, adrtable, adrtext=nil) {
	<<Changes
		<<12/18/09; 1:11:19 PM by DW
			<<Fix a problem which prevented River2's Quick Sub command from working with Tumblr blogs.
		<<11/5/09; 4:44:18 PM by DW
			<<Add optional parameter, adrtext. If not nil, use that text instead of reading it from the url. This saves multiple readings if we're sniffing at the text to figure out what it is.
		<<11/4/09; 6:53:01 PM by DW
			<<Don't look for link-rel just look for link. The rel attribute doesn't have to be first. Doh.
		<<11/4/09; 5:29:21 PM by DW
			<<Gather all the link-rel's out of the HTML text in a table.
	local (s);
	bundle { //get s, 11/5/09 by DW
		if adrtext == nil {
			s = tcp.httpreadurl (urlHtml, ctFollowRedirects:5)}
		else {
			s = string (adrtext^)}};
	local (ix, ixright, xmltext, xstruct);
	new (tabletype, adrtable);
	loop {
		ix = string.patternmatch ("<link ", string.lower (s));
		if ix == 0 {
			return (false)};
		s = string.delete (s, 1, ix-1);
		ixright = string.patternmatch (">", s);
		xmltext = string.mid (s, 1, ixright);
		try {
			local (xstruct);
			try {
				xml.compile (xmltext, @xstruct)}
			else { //12/18/09 by DW, maybe they didn't close the link with "/>"
				local (len = sizeof (xmltext));
				<<msg (xmltext [len-1])
				if xmltext [len-1] != "/" {
					xmltext = string.insert ("/", xmltext, len)};
				xml.compile (xmltext, @xstruct)};
			local (adrlink = xml.getaddress (@xstruct, "link"));
			local (adratts = @adrlink^.["/atts"]);
			adrtable^.[adratts^.href] = adratts^};
			<<scratchpad.xstruct = xstruct
		s = string.delete (s, 1, ixright)}};
bundle { //test code
	getHtmlLinks ("http://twitter.com/", @scratchpad.links2)}
	<<getHtmlLinks ("http://unberkeley.com", @scratchpad.links2)

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This listing is for code that runs in the OPML Editor environment. I created these listings because I wanted the search engines to index it, so that when I want to look up something in my codebase I don't have to use the much slower search functionality in my object database. Dave Winer.