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-rw-r--r--synapse/rest/client/v1/base.py8
-rw-r--r--synapse/rest/client/v1/events.py5
-rw-r--r--synapse/rest/client/v1/room.py29
-rw-r--r--synapse/rest/client/v2_alpha/_base.py9
-rw-r--r--synapse/rest/client/v2_alpha/auth.py18
-rw-r--r--synapse/rest/client/v2_alpha/devices.py6
-rw-r--r--synapse/rest/client/v2_alpha/notifications.py10
-rw-r--r--synapse/rest/client/v2_alpha/register.py63
-rw-r--r--synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py1
-rw-r--r--synapse/rest/client/v2_alpha/sendtodevice.py1
-rw-r--r--synapse/rest/client/v2_alpha/sync.py59
-rw-r--r--synapse/rest/media/v1/storage_provider.py1
12 files changed, 109 insertions, 101 deletions
diff --git a/synapse/rest/client/v1/base.py b/synapse/rest/client/v1/base.py
index c77d7aba68..dc63b661c0 100644
--- a/synapse/rest/client/v1/base.py
+++ b/synapse/rest/client/v1/base.py
@@ -19,7 +19,7 @@
 import logging
 import re
 
-from synapse.api.urls import CLIENT_PREFIX
+from synapse.api.urls import CLIENT_API_PREFIX
 from synapse.http.servlet import RestServlet
 from synapse.rest.client.transactions import HttpTransactionCache
 
@@ -36,12 +36,12 @@ def client_path_patterns(path_regex, releases=(0,), include_in_unstable=True):
     Returns:
         SRE_Pattern
     """
-    patterns = [re.compile("^" + CLIENT_PREFIX + path_regex)]
+    patterns = [re.compile("^" + CLIENT_API_PREFIX + "/api/v1" + path_regex)]
     if include_in_unstable:
-        unstable_prefix = CLIENT_PREFIX.replace("/api/v1", "/unstable")
+        unstable_prefix = CLIENT_API_PREFIX + "/unstable"
         patterns.append(re.compile("^" + unstable_prefix + path_regex))
     for release in releases:
-        new_prefix = CLIENT_PREFIX.replace("/api/v1", "/r%d" % release)
+        new_prefix = CLIENT_API_PREFIX + "/r%d" % (release,)
         patterns.append(re.compile("^" + new_prefix + path_regex))
     return patterns
 
diff --git a/synapse/rest/client/v1/events.py b/synapse/rest/client/v1/events.py
index cd9b3bdbd1..c3b0a39ab7 100644
--- a/synapse/rest/client/v1/events.py
+++ b/synapse/rest/client/v1/events.py
@@ -19,7 +19,6 @@ import logging
 from twisted.internet import defer
 
 from synapse.api.errors import SynapseError
-from synapse.events.utils import serialize_event
 from synapse.streams.config import PaginationConfig
 
 from .base import ClientV1RestServlet, client_path_patterns
@@ -84,6 +83,7 @@ class EventRestServlet(ClientV1RestServlet):
         super(EventRestServlet, self).__init__(hs)
         self.clock = hs.get_clock()
         self.event_handler = hs.get_event_handler()
+        self._event_serializer = hs.get_event_client_serializer()
 
     @defer.inlineCallbacks
     def on_GET(self, request, event_id):
@@ -92,7 +92,8 @@ class EventRestServlet(ClientV1RestServlet):
 
         time_now = self.clock.time_msec()
         if event:
-            defer.returnValue((200, serialize_event(event, time_now)))
+            event = yield self._event_serializer.serialize_event(event, time_now)
+            defer.returnValue((200, event))
         else:
             defer.returnValue((404, "Event not found."))
 
diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
index fab04965cb..255a85c588 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -26,7 +26,7 @@ from twisted.internet import defer
 from synapse.api.constants import EventTypes, Membership
 from synapse.api.errors import AuthError, Codes, SynapseError
 from synapse.api.filtering import Filter
-from synapse.events.utils import format_event_for_client_v2, serialize_event
+from synapse.events.utils import format_event_for_client_v2
 from synapse.http.servlet import (
     assert_params_in_dict,
     parse_integer,
@@ -537,6 +537,7 @@ class RoomEventServlet(ClientV1RestServlet):
         super(RoomEventServlet, self).__init__(hs)
         self.clock = hs.get_clock()
         self.event_handler = hs.get_event_handler()
+        self._event_serializer = hs.get_event_client_serializer()
 
     @defer.inlineCallbacks
     def on_GET(self, request, room_id, event_id):
@@ -545,7 +546,8 @@ class RoomEventServlet(ClientV1RestServlet):
 
         time_now = self.clock.time_msec()
         if event:
-            defer.returnValue((200, serialize_event(event, time_now)))
+            event = yield self._event_serializer.serialize_event(event, time_now)
+            defer.returnValue((200, event))
         else:
             defer.returnValue((404, "Event not found."))
 
@@ -559,6 +561,7 @@ class RoomEventContextServlet(ClientV1RestServlet):
         super(RoomEventContextServlet, self).__init__(hs)
         self.clock = hs.get_clock()
         self.room_context_handler = hs.get_room_context_handler()
+        self._event_serializer = hs.get_event_client_serializer()
 
     @defer.inlineCallbacks
     def on_GET(self, request, room_id, event_id):
@@ -588,16 +591,18 @@ class RoomEventContextServlet(ClientV1RestServlet):
             )
 
         time_now = self.clock.time_msec()
-        results["events_before"] = [
-            serialize_event(event, time_now) for event in results["events_before"]
-        ]
-        results["event"] = serialize_event(results["event"], time_now)
-        results["events_after"] = [
-            serialize_event(event, time_now) for event in results["events_after"]
-        ]
-        results["state"] = [
-            serialize_event(event, time_now) for event in results["state"]
-        ]
+        results["events_before"] = yield self._event_serializer.serialize_events(
+            results["events_before"], time_now,
+        )
+        results["event"] = yield self._event_serializer.serialize_event(
+            results["event"], time_now,
+        )
+        results["events_after"] = yield self._event_serializer.serialize_events(
+            results["events_after"], time_now,
+        )
+        results["state"] = yield self._event_serializer.serialize_events(
+            results["state"], time_now,
+        )
 
         defer.returnValue((200, results))
 
diff --git a/synapse/rest/client/v2_alpha/_base.py b/synapse/rest/client/v2_alpha/_base.py
index 77434937ff..24ac26bf03 100644
--- a/synapse/rest/client/v2_alpha/_base.py
+++ b/synapse/rest/client/v2_alpha/_base.py
@@ -21,13 +21,12 @@ import re
 from twisted.internet import defer
 
 from synapse.api.errors import InteractiveAuthIncompleteError
-from synapse.api.urls import CLIENT_V2_ALPHA_PREFIX
+from synapse.api.urls import CLIENT_API_PREFIX
 
 logger = logging.getLogger(__name__)
 
 
 def client_v2_patterns(path_regex, releases=(0,),
-                       v2_alpha=True,
                        unstable=True):
     """Creates a regex compiled client path with the correct client path
     prefix.
@@ -39,13 +38,11 @@ def client_v2_patterns(path_regex, releases=(0,),
         SRE_Pattern
     """
     patterns = []
-    if v2_alpha:
-        patterns.append(re.compile("^" + CLIENT_V2_ALPHA_PREFIX + path_regex))
     if unstable:
-        unstable_prefix = CLIENT_V2_ALPHA_PREFIX.replace("/v2_alpha", "/unstable")
+        unstable_prefix = CLIENT_API_PREFIX + "/unstable"
         patterns.append(re.compile("^" + unstable_prefix + path_regex))
     for release in releases:
-        new_prefix = CLIENT_V2_ALPHA_PREFIX.replace("/v2_alpha", "/r%d" % release)
+        new_prefix = CLIENT_API_PREFIX + "/r%d" % (release,)
         patterns.append(re.compile("^" + new_prefix + path_regex))
     return patterns
 
diff --git a/synapse/rest/client/v2_alpha/auth.py b/synapse/rest/client/v2_alpha/auth.py
index ac035c7735..4c380ab84d 100644
--- a/synapse/rest/client/v2_alpha/auth.py
+++ b/synapse/rest/client/v2_alpha/auth.py
@@ -19,7 +19,7 @@ from twisted.internet import defer
 
 from synapse.api.constants import LoginType
 from synapse.api.errors import SynapseError
-from synapse.api.urls import CLIENT_V2_ALPHA_PREFIX
+from synapse.api.urls import CLIENT_API_PREFIX
 from synapse.http.server import finish_request
 from synapse.http.servlet import RestServlet, parse_string
 
@@ -139,8 +139,8 @@ class AuthRestServlet(RestServlet):
         if stagetype == LoginType.RECAPTCHA:
             html = RECAPTCHA_TEMPLATE % {
                 'session': session,
-                'myurl': "%s/auth/%s/fallback/web" % (
-                    CLIENT_V2_ALPHA_PREFIX, LoginType.RECAPTCHA
+                'myurl': "%s/r0/auth/%s/fallback/web" % (
+                    CLIENT_API_PREFIX, LoginType.RECAPTCHA
                 ),
                 'sitekey': self.hs.config.recaptcha_public_key,
             }
@@ -159,8 +159,8 @@ class AuthRestServlet(RestServlet):
                     self.hs.config.public_baseurl,
                     self.hs.config.user_consent_version,
                 ),
-                'myurl': "%s/auth/%s/fallback/web" % (
-                    CLIENT_V2_ALPHA_PREFIX, LoginType.TERMS
+                'myurl': "%s/r0/auth/%s/fallback/web" % (
+                    CLIENT_API_PREFIX, LoginType.TERMS
                 ),
             }
             html_bytes = html.encode("utf8")
@@ -203,8 +203,8 @@ class AuthRestServlet(RestServlet):
             else:
                 html = RECAPTCHA_TEMPLATE % {
                     'session': session,
-                    'myurl': "%s/auth/%s/fallback/web" % (
-                        CLIENT_V2_ALPHA_PREFIX, LoginType.RECAPTCHA
+                    'myurl': "%s/r0/auth/%s/fallback/web" % (
+                        CLIENT_API_PREFIX, LoginType.RECAPTCHA
                     ),
                     'sitekey': self.hs.config.recaptcha_public_key,
                 }
@@ -240,8 +240,8 @@ class AuthRestServlet(RestServlet):
                         self.hs.config.public_baseurl,
                         self.hs.config.user_consent_version,
                     ),
-                    'myurl': "%s/auth/%s/fallback/web" % (
-                        CLIENT_V2_ALPHA_PREFIX, LoginType.TERMS
+                    'myurl': "%s/r0/auth/%s/fallback/web" % (
+                        CLIENT_API_PREFIX, LoginType.TERMS
                     ),
                 }
             html_bytes = html.encode("utf8")
diff --git a/synapse/rest/client/v2_alpha/devices.py b/synapse/rest/client/v2_alpha/devices.py
index 9b75bb1377..5a5be7c390 100644
--- a/synapse/rest/client/v2_alpha/devices.py
+++ b/synapse/rest/client/v2_alpha/devices.py
@@ -30,7 +30,7 @@ logger = logging.getLogger(__name__)
 
 
 class DevicesRestServlet(RestServlet):
-    PATTERNS = client_v2_patterns("/devices$", v2_alpha=False)
+    PATTERNS = client_v2_patterns("/devices$")
 
     def __init__(self, hs):
         """
@@ -56,7 +56,7 @@ class DeleteDevicesRestServlet(RestServlet):
     API for bulk deletion of devices. Accepts a JSON object with a devices
     key which lists the device_ids to delete. Requires user interactive auth.
     """
-    PATTERNS = client_v2_patterns("/delete_devices", v2_alpha=False)
+    PATTERNS = client_v2_patterns("/delete_devices")
 
     def __init__(self, hs):
         super(DeleteDevicesRestServlet, self).__init__()
@@ -95,7 +95,7 @@ class DeleteDevicesRestServlet(RestServlet):
 
 
 class DeviceRestServlet(RestServlet):
-    PATTERNS = client_v2_patterns("/devices/(?P<device_id>[^/]*)$", v2_alpha=False)
+    PATTERNS = client_v2_patterns("/devices/(?P<device_id>[^/]*)$")
 
     def __init__(self, hs):
         """
diff --git a/synapse/rest/client/v2_alpha/notifications.py b/synapse/rest/client/v2_alpha/notifications.py
index 2a6ea3df5f..0a1eb0ae45 100644
--- a/synapse/rest/client/v2_alpha/notifications.py
+++ b/synapse/rest/client/v2_alpha/notifications.py
@@ -17,10 +17,7 @@ import logging
 
 from twisted.internet import defer
 
-from synapse.events.utils import (
-    format_event_for_client_v2_without_room_id,
-    serialize_event,
-)
+from synapse.events.utils import format_event_for_client_v2_without_room_id
 from synapse.http.servlet import RestServlet, parse_integer, parse_string
 
 from ._base import client_v2_patterns
@@ -36,6 +33,7 @@ class NotificationsServlet(RestServlet):
         self.store = hs.get_datastore()
         self.auth = hs.get_auth()
         self.clock = hs.get_clock()
+        self._event_serializer = hs.get_event_client_serializer()
 
     @defer.inlineCallbacks
     def on_GET(self, request):
@@ -69,11 +67,11 @@ class NotificationsServlet(RestServlet):
                 "profile_tag": pa["profile_tag"],
                 "actions": pa["actions"],
                 "ts": pa["received_ts"],
-                "event": serialize_event(
+                "event": (yield self._event_serializer.serialize_event(
                     notif_events[pa["event_id"]],
                     self.clock.time_msec(),
                     event_format=format_event_for_client_v2_without_room_id,
-                ),
+                )),
             }
 
             if pa["room_id"] not in receipts_by_room:
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index c51241fa01..042f636135 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -31,6 +31,7 @@ from synapse.api.errors import (
     SynapseError,
     UnrecognizedRequestError,
 )
+from synapse.config.ratelimiting import FederationRateLimitConfig
 from synapse.config.server import is_threepid_reserved
 from synapse.http.servlet import (
     RestServlet,
@@ -153,16 +154,18 @@ class UsernameAvailabilityRestServlet(RestServlet):
         self.registration_handler = hs.get_registration_handler()
         self.ratelimiter = FederationRateLimiter(
             hs.get_clock(),
-            # Time window of 2s
-            window_size=2000,
-            # Artificially delay requests if rate > sleep_limit/window_size
-            sleep_limit=1,
-            # Amount of artificial delay to apply
-            sleep_msec=1000,
-            # Error with 429 if more than reject_limit requests are queued
-            reject_limit=1,
-            # Allow 1 request at a time
-            concurrent_requests=1,
+            FederationRateLimitConfig(
+                # Time window of 2s
+                window_size=2000,
+                # Artificially delay requests if rate > sleep_limit/window_size
+                sleep_limit=1,
+                # Amount of artificial delay to apply
+                sleep_msec=1000,
+                # Error with 429 if more than reject_limit requests are queued
+                reject_limit=1,
+                # Allow 1 request at a time
+                concurrent_requests=1,
+            )
         )
 
     @defer.inlineCallbacks
@@ -403,13 +406,6 @@ class RegisterRestServlet(RestServlet):
         # the user-facing checks will probably already have happened in
         # /register/email/requestToken when we requested a 3pid, but that's not
         # guaranteed.
-        #
-        # Also check that we're not trying to register a 3pid that's already
-        # been registered.
-        #
-        # This has probably happened in /register/email/requestToken as well,
-        # but if a user hits this endpoint twice then clicks on each link from
-        # the two activation emails, they would register the same 3pid twice.
 
         if auth_result:
             for login_type in [LoginType.EMAIL_IDENTITY, LoginType.MSISDN]:
@@ -425,17 +421,6 @@ class RegisterRestServlet(RestServlet):
                             Codes.THREEPID_DENIED,
                         )
 
-                    existingUid = yield self.store.get_user_id_by_threepid(
-                        medium, address,
-                    )
-
-                    if existingUid is not None:
-                        raise SynapseError(
-                            400,
-                            "%s is already in use" % medium,
-                            Codes.THREEPID_IN_USE,
-                        )
-
         if registered_user_id is not None:
             logger.info(
                 "Already registered user ID %r for this session",
@@ -458,6 +443,28 @@ class RegisterRestServlet(RestServlet):
             if auth_result:
                 threepid = auth_result.get(LoginType.EMAIL_IDENTITY)
 
+                # Also check that we're not trying to register a 3pid that's already
+                # been registered.
+                #
+                # This has probably happened in /register/email/requestToken as well,
+                # but if a user hits this endpoint twice then clicks on each link from
+                # the two activation emails, they would register the same 3pid twice.
+                for login_type in [LoginType.EMAIL_IDENTITY, LoginType.MSISDN]:
+                    if login_type in auth_result:
+                        medium = auth_result[login_type]['medium']
+                        address = auth_result[login_type]['address']
+
+                        existingUid = yield self.store.get_user_id_by_threepid(
+                            medium, address,
+                        )
+
+                        if existingUid is not None:
+                            raise SynapseError(
+                                400,
+                                "%s is already in use" % medium,
+                                Codes.THREEPID_IN_USE,
+                            )
+
             (registered_user_id, _) = yield self.registration_handler.register(
                 localpart=desired_username,
                 password=new_password,
diff --git a/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py b/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py
index 3db7ff8d1b..62b8de71fa 100644
--- a/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py
+++ b/synapse/rest/client/v2_alpha/room_upgrade_rest_servlet.py
@@ -50,7 +50,6 @@ class RoomUpgradeRestServlet(RestServlet):
     PATTERNS = client_v2_patterns(
         # /rooms/$roomid/upgrade
         "/rooms/(?P<room_id>[^/]*)/upgrade$",
-        v2_alpha=False,
     )
 
     def __init__(self, hs):
diff --git a/synapse/rest/client/v2_alpha/sendtodevice.py b/synapse/rest/client/v2_alpha/sendtodevice.py
index a9e9a47a0b..21e9cef2d0 100644
--- a/synapse/rest/client/v2_alpha/sendtodevice.py
+++ b/synapse/rest/client/v2_alpha/sendtodevice.py
@@ -29,7 +29,6 @@ logger = logging.getLogger(__name__)
 class SendToDeviceRestServlet(servlet.RestServlet):
     PATTERNS = client_v2_patterns(
         "/sendToDevice/(?P<message_type>[^/]*)/(?P<txn_id>[^/]*)$",
-        v2_alpha=False
     )
 
     def __init__(self, hs):
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index 39d157a44b..c701e534e7 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -26,7 +26,6 @@ from synapse.api.filtering import DEFAULT_FILTER_COLLECTION, FilterCollection
 from synapse.events.utils import (
     format_event_for_client_v2_without_room_id,
     format_event_raw,
-    serialize_event,
 )
 from synapse.handlers.presence import format_user_presence_state
 from synapse.handlers.sync import SyncConfig
@@ -86,6 +85,7 @@ class SyncRestServlet(RestServlet):
         self.filtering = hs.get_filtering()
         self.presence_handler = hs.get_presence_handler()
         self._server_notices_sender = hs.get_server_notices_sender()
+        self._event_serializer = hs.get_event_client_serializer()
 
     @defer.inlineCallbacks
     def on_GET(self, request):
@@ -168,14 +168,14 @@ class SyncRestServlet(RestServlet):
             )
 
         time_now = self.clock.time_msec()
-        response_content = self.encode_response(
+        response_content = yield self.encode_response(
             time_now, sync_result, requester.access_token_id, filter
         )
 
         defer.returnValue((200, response_content))
 
-    @staticmethod
-    def encode_response(time_now, sync_result, access_token_id, filter):
+    @defer.inlineCallbacks
+    def encode_response(self, time_now, sync_result, access_token_id, filter):
         if filter.event_format == 'client':
             event_formatter = format_event_for_client_v2_without_room_id
         elif filter.event_format == 'federation':
@@ -183,24 +183,24 @@ class SyncRestServlet(RestServlet):
         else:
             raise Exception("Unknown event format %s" % (filter.event_format, ))
 
-        joined = SyncRestServlet.encode_joined(
+        joined = yield self.encode_joined(
             sync_result.joined, time_now, access_token_id,
             filter.event_fields,
             event_formatter,
         )
 
-        invited = SyncRestServlet.encode_invited(
+        invited = yield self.encode_invited(
             sync_result.invited, time_now, access_token_id,
             event_formatter,
         )
 
-        archived = SyncRestServlet.encode_archived(
+        archived = yield self.encode_archived(
             sync_result.archived, time_now, access_token_id,
             filter.event_fields,
             event_formatter,
         )
 
-        return {
+        defer.returnValue({
             "account_data": {"events": sync_result.account_data},
             "to_device": {"events": sync_result.to_device},
             "device_lists": {
@@ -222,7 +222,7 @@ class SyncRestServlet(RestServlet):
             },
             "device_one_time_keys_count": sync_result.device_one_time_keys_count,
             "next_batch": sync_result.next_batch.to_string(),
-        }
+        })
 
     @staticmethod
     def encode_presence(events, time_now):
@@ -239,8 +239,8 @@ class SyncRestServlet(RestServlet):
             ]
         }
 
-    @staticmethod
-    def encode_joined(rooms, time_now, token_id, event_fields, event_formatter):
+    @defer.inlineCallbacks
+    def encode_joined(self, rooms, time_now, token_id, event_fields, event_formatter):
         """
         Encode the joined rooms in a sync result
 
@@ -261,15 +261,15 @@ class SyncRestServlet(RestServlet):
         """
         joined = {}
         for room in rooms:
-            joined[room.room_id] = SyncRestServlet.encode_room(
+            joined[room.room_id] = yield self.encode_room(
                 room, time_now, token_id, joined=True, only_fields=event_fields,
                 event_formatter=event_formatter,
             )
 
-        return joined
+        defer.returnValue(joined)
 
-    @staticmethod
-    def encode_invited(rooms, time_now, token_id, event_formatter):
+    @defer.inlineCallbacks
+    def encode_invited(self, rooms, time_now, token_id, event_formatter):
         """
         Encode the invited rooms in a sync result
 
@@ -289,7 +289,7 @@ class SyncRestServlet(RestServlet):
         """
         invited = {}
         for room in rooms:
-            invite = serialize_event(
+            invite = yield self._event_serializer.serialize_event(
                 room.invite, time_now, token_id=token_id,
                 event_format=event_formatter,
                 is_invite=True,
@@ -302,10 +302,10 @@ class SyncRestServlet(RestServlet):
                 "invite_state": {"events": invited_state}
             }
 
-        return invited
+        defer.returnValue(invited)
 
-    @staticmethod
-    def encode_archived(rooms, time_now, token_id, event_fields, event_formatter):
+    @defer.inlineCallbacks
+    def encode_archived(self, rooms, time_now, token_id, event_fields, event_formatter):
         """
         Encode the archived rooms in a sync result
 
@@ -326,17 +326,17 @@ class SyncRestServlet(RestServlet):
         """
         joined = {}
         for room in rooms:
-            joined[room.room_id] = SyncRestServlet.encode_room(
+            joined[room.room_id] = yield self.encode_room(
                 room, time_now, token_id, joined=False,
                 only_fields=event_fields,
                 event_formatter=event_formatter,
             )
 
-        return joined
+        defer.returnValue(joined)
 
-    @staticmethod
+    @defer.inlineCallbacks
     def encode_room(
-            room, time_now, token_id, joined,
+            self, room, time_now, token_id, joined,
             only_fields, event_formatter,
     ):
         """
@@ -355,9 +355,10 @@ class SyncRestServlet(RestServlet):
         Returns:
             dict[str, object]: the room, encoded in our response format
         """
-        def serialize(event):
-            return serialize_event(
-                event, time_now, token_id=token_id,
+        def serialize(events):
+            return self._event_serializer.serialize_events(
+                events, time_now=time_now,
+                token_id=token_id,
                 event_format=event_formatter,
                 only_event_fields=only_fields,
             )
@@ -376,8 +377,8 @@ class SyncRestServlet(RestServlet):
                     event.event_id, room.room_id, event.room_id,
                 )
 
-        serialized_state = [serialize(e) for e in state_events]
-        serialized_timeline = [serialize(e) for e in timeline_events]
+        serialized_state = yield serialize(state_events)
+        serialized_timeline = yield serialize(timeline_events)
 
         account_data = room.account_data
 
@@ -397,7 +398,7 @@ class SyncRestServlet(RestServlet):
             result["unread_notifications"] = room.unread_notifications
             result["summary"] = room.summary
 
-        return result
+        defer.returnValue(result)
 
 
 def register_servlets(hs, http_server):
diff --git a/synapse/rest/media/v1/storage_provider.py b/synapse/rest/media/v1/storage_provider.py
index 5aa03031f6..d90cbfb56a 100644
--- a/synapse/rest/media/v1/storage_provider.py
+++ b/synapse/rest/media/v1/storage_provider.py
@@ -108,6 +108,7 @@ class FileStorageProviderBackend(StorageProvider):
     """
 
     def __init__(self, hs, config):
+        self.hs = hs
         self.cache_directory = hs.config.media_store_path
         self.base_directory = config