Add port of Dojo's util/url

util/url.js

@@ -0,0 +1,105 @@
+var
+	ore = new RegExp("^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?$"),
+	ire = new RegExp("^((([^\\[:]+):)?([^@]+)@)?(\\[([^\\]]+)\\]|([^\\[:]*))(:([0-9]+))?$"),
+	_Url = function(){
+		var n = null,
+			_a = arguments,
+			uri = [_a[0]];
+		// resolve uri components relative to each other
+		for(var i = 1; i<_a.length; i++){
+			if(!_a[i]){ continue; }
+
+			// Safari doesn't support this.constructor so we have to be explicit
+			// FIXME: Tracked (and fixed) in Webkit bug 3537.
+			//		http://bugs.webkit.org/show_bug.cgi?id=3537
+			var relobj = new _Url(_a[i]+""),
+				uriobj = new _Url(uri[0]+"");
+
+			if(
+				relobj.path == "" &&
+				!relobj.scheme &&
+				!relobj.authority &&
+				!relobj.query
+			){
+				if(relobj.fragment != n){
+					uriobj.fragment = relobj.fragment;
+				}
+				relobj = uriobj;
+			}else if(!relobj.scheme){
+				relobj.scheme = uriobj.scheme;
+
+				if(!relobj.authority){
+					relobj.authority = uriobj.authority;
+
+					if(relobj.path.charAt(0) != "/"){
+						var path = uriobj.path.substring(0,
+							uriobj.path.lastIndexOf("/") + 1) + relobj.path;
+
+						var segs = path.split("/");
+						for(var j = 0; j < segs.length; j++){
+							if(segs[j] == "."){
+								// flatten "./" references
+								if(j == segs.length - 1){
+									segs[j] = "";
+								}else{
+									segs.splice(j, 1);
+									j--;
+								}
+							}else if(j > 0 && !(j == 1 && segs[0] == "") &&
+								segs[j] == ".." && segs[j-1] != ".."){
+								// flatten "../" references
+								if(j == (segs.length - 1)){
+									segs.splice(j, 1);
+									segs[j - 1] = "";
+								}else{
+									segs.splice(j - 1, 2);
+									j -= 2;
+								}
+							}
+						}
+						relobj.path = segs.join("/");
+					}
+				}
+			}
+
+			uri = [];
+			if(relobj.scheme){
+				uri.push(relobj.scheme, ":");
+			}
+			if(relobj.authority){
+				uri.push("//", relobj.authority);
+			}
+			uri.push(relobj.path);
+			if(relobj.query){
+				uri.push("?", relobj.query);
+			}
+			if(relobj.fragment){
+				uri.push("#", relobj.fragment);
+			}
+		}
+
+		this.uri = uri.join("");
+
+		// break the uri into its main components
+		var r = this.uri.match(ore);
+
+		this.scheme = r[2] || (r[1] ? "" : n);
+		this.authority = r[4] || (r[3] ? "" : n);
+		this.path = r[5]; // can never be undefined
+		this.query = r[7] || (r[6] ? "" : n);
+		this.fragment	 = r[9] || (r[8] ? "" : n);
+
+		if(this.authority != n){
+			// server based naming authority
+			r = this.authority.match(ire);
+
+			this.user = r[3] || n;
+			this.password = r[4] || n;
+			this.host = r[6] || r[7]; // ipv6 || ipv4
+			this.port = r[9] || n;
+		}
+	};
+_Url.prototype.toString = function(){ return this.uri; };
+exports.resolve = function(base, next){
+	return new _Url(base, next).toString();
+};