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diff --git a/server/src/leap/soledad/server/url_mapper.py b/server/src/leap/soledad/server/url_mapper.py
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+++ b/server/src/leap/soledad/server/url_mapper.py
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+# -*- coding: utf-8 -*-
+# url_mapper.py
+# Copyright (C) 2013 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+"""
+An URL mapper that represents authorized paths.
+"""
+from routes.mapper import Mapper
+
+from leap.soledad.common import SHARED_DB_NAME
+from leap.soledad.common.l2db import DBNAME_CONSTRAINTS
+
+
+class URLMapper(object):
+    """
+    Maps the URLs users can access.
+    """
+
+    def __init__(self):
+        self._map = Mapper(controller_scan=None)
+        self._connect_urls()
+        self._map.create_regs()
+
+    def match(self, path, method):
+        environ = {'PATH_INFO': path, 'REQUEST_METHOD': method}
+        return self._map.match(environ=environ)
+
+    def _connect(self, pattern, http_methods):
+        self._map.connect(
+            None, pattern, http_methods=http_methods,
+            conditions=dict(method=http_methods),
+            requirements={'dbname': DBNAME_CONSTRAINTS})
+
+    def _connect_urls(self):
+        """
+        Register the authorization info in the mapper using C{SHARED_DB_NAME}
+        as the user's database name.
+
+        This method sets up the following authorization rules:
+
+            URL path                      | Authorized actions
+            --------------------------------------------------
+            /                             | GET
+            /robots.txt                   | GET
+            /shared-db                    | GET
+            /shared-db/docs               | -
+            /shared-db/doc/{any_id}       | GET, PUT, DELETE
+            /shared-db/sync-from/{source} | -
+            /user-db                      | -
+            /user-db/docs                 | -
+            /user-db/doc/{id}             | -
+            /user-db/sync-from/{source}   | GET, PUT, POST
+        """
+        # auth info for global resource
+        self._connect('/', ['GET'])
+        # robots
+        self._connect('/robots.txt', ['GET'])
+        # auth info for shared-db database resource
+        self._connect('/%s' % SHARED_DB_NAME, ['GET'])
+        # auth info for shared-db doc resource
+        self._connect('/%s/doc/{id:.*}' % SHARED_DB_NAME,
+                      ['GET', 'PUT', 'DELETE'])
+        # auth info for user-db sync resource
+        self._connect('/user-{uuid}/sync-from/{source_replica_uid}',
+                      ['GET', 'PUT', 'POST'])