a URI module for creating URIs (wraps nsIIOService::newURI)

URI.js

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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is URI.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2008
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Myk Melez <myk@mozilla.org>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+const EXPORTED_SYMBOLS = ["URI"];
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cr = Components.results;
+const Cu = Components.utils;
+
+/**
+ * A URI.  For now, this returns an nsIURI rather than an instance of this
+ * class, but in the future it might return an instance of this class and have
+ * a more JS-friendly API for accessing and manipulating the URI.
+ */
+function URI(aSpec, aCharset, aBaseURI) {
+  return URI.ioSvc.newURI(aSpec, aCharset, aBaseURI);
+}
+
+/**
+ * Get a URI.  Similar to the constructor, but returns null instead of throwing
+ * an exception if the URI object could not be constructed.
+ */
+URI.get = function(aSpec, aCharset, aBaseURI) {
+  try {
+    return new URI(aSpec, aCharset, aBaseURI);
+  }
+  catch(ex) {
+    return null;
+  }
+};
+
+URI.__defineGetter__("ioSvc",
+  function() {
+    delete this.ioSvc;
+    return this.ioSvc = Cc["@mozilla.org/network/io-service;1"].
+                        getService(Ci.nsIIOService);
+  }
+);