Added req.auth

tests to come

lib/request.js

@@ -368,6 +368,33 @@ req.__defineGetter__('ips', function(){
     : [];
 });
 
+/**
+ * Return basic auth credentials.
+ *
+ * Examples:
+ *
+ *    // http://tobi:hello@example.com
+ *    req.auth
+ *    // => { username: 'tobi', password: 'hello' }
+ *
+ * @return {Object}
+ * @api public
+ */
+
+req.__defineGetter__('auth', function(){
+  // missing
+  var auth = this.get('Authorization');
+  if (!auth) return {};
+
+  // malformed
+  auth = auth.split(' ')[1];
+  if (!auth) return {};
+
+  // credentials
+  auth = new Buffer(auth, 'base64').toString().split(':');
+  return { username: auth[0], password: auth[1] };
+});
+
 /**
  * Return subdomains as an array.
  *