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-rw-r--r--synapse/rest/client/v2_alpha/__init__.py2
-rw-r--r--synapse/rest/client/v2_alpha/tokenrefresh.py56
2 files changed, 58 insertions, 0 deletions
diff --git a/synapse/rest/client/v2_alpha/__init__.py b/synapse/rest/client/v2_alpha/__init__.py
index 33f961e898..5831ff0e62 100644
--- a/synapse/rest/client/v2_alpha/__init__.py
+++ b/synapse/rest/client/v2_alpha/__init__.py
@@ -21,6 +21,7 @@ from . import (
     auth,
     receipts,
     keys,
+    tokenrefresh,
 )
 
 from synapse.http.server import JsonResource
@@ -42,3 +43,4 @@ class ClientV2AlphaRestResource(JsonResource):
         auth.register_servlets(hs, client_resource)
         receipts.register_servlets(hs, client_resource)
         keys.register_servlets(hs, client_resource)
+        tokenrefresh.register_servlets(hs, client_resource)
diff --git a/synapse/rest/client/v2_alpha/tokenrefresh.py b/synapse/rest/client/v2_alpha/tokenrefresh.py
new file mode 100644
index 0000000000..901e777983
--- /dev/null
+++ b/synapse/rest/client/v2_alpha/tokenrefresh.py
@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from twisted.internet import defer
+
+from synapse.api.errors import AuthError, StoreError, SynapseError
+from synapse.http.servlet import RestServlet
+
+from ._base import client_v2_pattern, parse_json_dict_from_request
+
+
+class TokenRefreshRestServlet(RestServlet):
+    """
+    Exchanges refresh tokens for a pair of an access token and a new refresh
+    token.
+    """
+    PATTERN = client_v2_pattern("/tokenrefresh")
+
+    def __init__(self, hs):
+        super(TokenRefreshRestServlet, self).__init__()
+        self.hs = hs
+        self.store = hs.get_datastore()
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        body = parse_json_dict_from_request(request)
+        try:
+            old_refresh_token = body["refresh_token"]
+            auth_handler = self.hs.get_handlers().auth_handler
+            (user_id, new_refresh_token) = yield self.store.exchange_refresh_token(
+                old_refresh_token, auth_handler.generate_refresh_token)
+            new_access_token = yield auth_handler.issue_access_token(user_id)
+            defer.returnValue((200, {
+                "access_token": new_access_token,
+                "refresh_token": new_refresh_token,
+            }))
+        except KeyError:
+            raise SynapseError(400, "Missing required key 'refresh_token'.")
+        except StoreError:
+            raise AuthError(403, "Did not recognize refresh token")
+
+
+def register_servlets(hs, http_server):
+    TokenRefreshRestServlet(hs).register(http_server)