A routine that builds on Dan MacTough's opmlparser package for node.js. I think this should be part of what's released in opmlparser. It's a higher level interface, and much easier for the app that's using opmlparser to deal with. It actually generates a JavaScript tree structure from the OPML.

readOpml.js

function readOpml (urloutline, callback) { 
	var outlineArray = new Array ();
	var req = request (urloutline);
	var opmlparser = new opmlParser ();
	
	req.on ("response", function (res) {
		var stream = this;
		if (res.statusCode == 200) {
			stream.pipe (opmlparser);
			}
		});
	req.on ("error", function (res) {
		});
	opmlparser.on ("error", function (error) {
		console.log ("readOpml: opml parser error == " + error.message);
		});
	opmlparser.on ("readable", function () {
		var outline;
		while (outline = this.read ()) {
			var ix = Number (outline ["#id"]);
			outlineArray [ix] = outline;
			}
		});
	opmlparser.on ("end", function () {
		for (var i = 0; i < outlineArray.length; i++) {
			var obj = outlineArray [i];
			if (obj) {
				var idparent = obj ["#parentid"];
				if (idparent) {
					var parent = outlineArray [idparent];
					if (parent.subs == undefined) {
						parent.subs = new Array ();
						}
					parent.subs [parent.subs.length] = obj;
					}
				delete obj ["#id"];
				delete obj ["#parentid"];
				}
			}
		if (callback != undefined) {
			callback (outlineArray [1]);
			}
		});
	}