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-rw-r--r--synapse/handlers/auth.py24
-rw-r--r--synapse/handlers/deactivate_account.py13
-rw-r--r--synapse/handlers/federation.py74
-rw-r--r--synapse/handlers/identity.py32
-rw-r--r--synapse/handlers/message.py88
-rw-r--r--synapse/handlers/register.py18
-rw-r--r--synapse/handlers/sync.py13
7 files changed, 201 insertions, 61 deletions
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index 7ea8ce9f94..4a81bd2ba9 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -520,7 +520,7 @@ class AuthHandler(BaseHandler):
         """
         logger.info("Logging in user %s on device %s", user_id, device_id)
         access_token = yield self.issue_access_token(user_id, device_id)
-        yield self.auth.check_auth_blocking()
+        yield self.auth.check_auth_blocking(user_id)
 
         # the device *should* have been registered before we got here; however,
         # it's possible we raced against a DELETE operation. The thing we
@@ -734,7 +734,6 @@ class AuthHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def validate_short_term_login_token_and_get_user_id(self, login_token):
-        yield self.auth.check_auth_blocking()
         auth_api = self.hs.get_auth()
         user_id = None
         try:
@@ -743,6 +742,7 @@ class AuthHandler(BaseHandler):
             auth_api.validate_macaroon(macaroon, "login", True, user_id)
         except Exception:
             raise AuthError(403, "Invalid token", errcode=Codes.FORBIDDEN)
+        yield self.auth.check_auth_blocking(user_id)
         defer.returnValue(user_id)
 
     @defer.inlineCallbacks
@@ -828,12 +828,26 @@ class AuthHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def delete_threepid(self, user_id, medium, address):
+        """Attempts to unbind the 3pid on the identity servers and deletes it
+        from the local database.
+
+        Args:
+            user_id (str)
+            medium (str)
+            address (str)
+
+        Returns:
+            Deferred[bool]: Returns True if successfully unbound the 3pid on
+            the identity server, False if identity server doesn't support the
+            unbind API.
+        """
+
         # 'Canonicalise' email addresses as per above
         if medium == 'email':
             address = address.lower()
 
         identity_handler = self.hs.get_handlers().identity_handler
-        yield identity_handler.unbind_threepid(
+        result = yield identity_handler.try_unbind_threepid(
             user_id,
             {
                 'medium': medium,
@@ -841,10 +855,10 @@ class AuthHandler(BaseHandler):
             },
         )
 
-        ret = yield self.store.user_delete_threepid(
+        yield self.store.user_delete_threepid(
             user_id, medium, address,
         )
-        defer.returnValue(ret)
+        defer.returnValue(result)
 
     def _save_session(self, session):
         # TODO: Persistent storage
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py
index b3c5a9ee64..b078df4a76 100644
--- a/synapse/handlers/deactivate_account.py
+++ b/synapse/handlers/deactivate_account.py
@@ -51,7 +51,8 @@ class DeactivateAccountHandler(BaseHandler):
             erase_data (bool): whether to GDPR-erase the user's data
 
         Returns:
-            Deferred
+            Deferred[bool]: True if identity server supports removing
+            threepids, otherwise False.
         """
         # FIXME: Theoretically there is a race here wherein user resets
         # password using threepid.
@@ -60,16 +61,22 @@ class DeactivateAccountHandler(BaseHandler):
         # leave the user still active so they can try again.
         # Ideally we would prevent password resets and then do this in the
         # background thread.
+
+        # This will be set to false if the identity server doesn't support
+        # unbinding
+        identity_server_supports_unbinding = True
+
         threepids = yield self.store.user_get_threepids(user_id)
         for threepid in threepids:
             try:
-                yield self._identity_handler.unbind_threepid(
+                result = yield self._identity_handler.try_unbind_threepid(
                     user_id,
                     {
                         'medium': threepid['medium'],
                         'address': threepid['address'],
                     },
                 )
+                identity_server_supports_unbinding &= result
             except Exception:
                 # Do we want this to be a fatal error or should we carry on?
                 logger.exception("Failed to remove threepid from ID server")
@@ -103,6 +110,8 @@ class DeactivateAccountHandler(BaseHandler):
         # parts users from rooms (if it isn't already running)
         self._start_user_parting()
 
+        defer.returnValue(identity_server_supports_unbinding)
+
     def _start_user_parting(self):
         """
         Start the process that goes through the table of users
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 2380d17f4e..f38b393e4a 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -49,6 +49,11 @@ from synapse.crypto.event_signing import (
     compute_event_signature,
 )
 from synapse.events.validator import EventValidator
+from synapse.replication.http.federation import (
+    ReplicationCleanRoomRestServlet,
+    ReplicationFederationSendEventsRestServlet,
+)
+from synapse.replication.http.membership import ReplicationUserJoinedLeftRoomRestServlet
 from synapse.state import resolve_events_with_factory
 from synapse.types import UserID, get_domain_from_id
 from synapse.util import logcontext, unwrapFirstError
@@ -91,6 +96,18 @@ class FederationHandler(BaseHandler):
         self.spam_checker = hs.get_spam_checker()
         self.event_creation_handler = hs.get_event_creation_handler()
         self._server_notices_mxid = hs.config.server_notices_mxid
+        self.config = hs.config
+        self.http_client = hs.get_simple_http_client()
+
+        self._send_events_to_master = (
+            ReplicationFederationSendEventsRestServlet.make_client(hs)
+        )
+        self._notify_user_membership_change = (
+            ReplicationUserJoinedLeftRoomRestServlet.make_client(hs)
+        )
+        self._clean_room_for_join_client = (
+            ReplicationCleanRoomRestServlet.make_client(hs)
+        )
 
         # When joining a room we need to queue any events for that room up
         self.room_queues = {}
@@ -1158,7 +1175,7 @@ class FederationHandler(BaseHandler):
         )
 
         context = yield self.state_handler.compute_event_context(event)
-        yield self._persist_events([(event, context)])
+        yield self.persist_events_and_notify([(event, context)])
 
         defer.returnValue(event)
 
@@ -1189,7 +1206,7 @@ class FederationHandler(BaseHandler):
         )
 
         context = yield self.state_handler.compute_event_context(event)
-        yield self._persist_events([(event, context)])
+        yield self.persist_events_and_notify([(event, context)])
 
         defer.returnValue(event)
 
@@ -1432,7 +1449,7 @@ class FederationHandler(BaseHandler):
                     event, context
                 )
 
-            yield self._persist_events(
+            yield self.persist_events_and_notify(
                 [(event, context)],
                 backfilled=backfilled,
             )
@@ -1470,7 +1487,7 @@ class FederationHandler(BaseHandler):
             ], consumeErrors=True,
         ))
 
-        yield self._persist_events(
+        yield self.persist_events_and_notify(
             [
                 (ev_info["event"], context)
                 for ev_info, context in zip(event_infos, contexts)
@@ -1558,7 +1575,7 @@ class FederationHandler(BaseHandler):
                     raise
                 events_to_context[e.event_id].rejected = RejectedReason.AUTH_ERROR
 
-        yield self._persist_events(
+        yield self.persist_events_and_notify(
             [
                 (e, events_to_context[e.event_id])
                 for e in itertools.chain(auth_events, state)
@@ -1569,7 +1586,7 @@ class FederationHandler(BaseHandler):
             event, old_state=state
         )
 
-        yield self._persist_events(
+        yield self.persist_events_and_notify(
             [(event, new_event_context)],
         )
 
@@ -2297,7 +2314,7 @@ class FederationHandler(BaseHandler):
                 for revocation.
         """
         try:
-            response = yield self.hs.get_simple_http_client().get_json(
+            response = yield self.http_client.get_json(
                 url,
                 {"public_key": public_key}
             )
@@ -2310,7 +2327,7 @@ class FederationHandler(BaseHandler):
             raise AuthError(403, "Third party certificate was invalid")
 
     @defer.inlineCallbacks
-    def _persist_events(self, event_and_contexts, backfilled=False):
+    def persist_events_and_notify(self, event_and_contexts, backfilled=False):
         """Persists events and tells the notifier/pushers about them, if
         necessary.
 
@@ -2322,14 +2339,21 @@ class FederationHandler(BaseHandler):
         Returns:
             Deferred
         """
-        max_stream_id = yield self.store.persist_events(
-            event_and_contexts,
-            backfilled=backfilled,
-        )
+        if self.config.worker_app:
+            yield self._send_events_to_master(
+                store=self.store,
+                event_and_contexts=event_and_contexts,
+                backfilled=backfilled
+            )
+        else:
+            max_stream_id = yield self.store.persist_events(
+                event_and_contexts,
+                backfilled=backfilled,
+            )
 
-        if not backfilled:  # Never notify for backfilled events
-            for event, _ in event_and_contexts:
-                self._notify_persisted_event(event, max_stream_id)
+            if not backfilled:  # Never notify for backfilled events
+                for event, _ in event_and_contexts:
+                    self._notify_persisted_event(event, max_stream_id)
 
     def _notify_persisted_event(self, event, max_stream_id):
         """Checks to see if notifier/pushers should be notified about the
@@ -2368,9 +2392,25 @@ class FederationHandler(BaseHandler):
         )
 
     def _clean_room_for_join(self, room_id):
-        return self.store.clean_room_for_join(room_id)
+        """Called to clean up any data in DB for a given room, ready for the
+        server to join the room.
+
+        Args:
+            room_id (str)
+        """
+        if self.config.worker_app:
+            return self._clean_room_for_join_client(room_id)
+        else:
+            return self.store.clean_room_for_join(room_id)
 
     def user_joined_room(self, user, room_id):
         """Called when a new user has joined the room
         """
-        return user_joined_room(self.distributor, user, room_id)
+        if self.config.worker_app:
+            return self._notify_user_membership_change(
+                room_id=room_id,
+                user_id=user.to_string(),
+                change="joined",
+            )
+        else:
+            return user_joined_room(self.distributor, user, room_id)
diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py
index 1d36d967c3..5feb3f22a6 100644
--- a/synapse/handlers/identity.py
+++ b/synapse/handlers/identity.py
@@ -137,15 +137,19 @@ class IdentityHandler(BaseHandler):
         defer.returnValue(data)
 
     @defer.inlineCallbacks
-    def unbind_threepid(self, mxid, threepid):
-        """
-        Removes a binding from an identity server
+    def try_unbind_threepid(self, mxid, threepid):
+        """Removes a binding from an identity server
+
         Args:
             mxid (str): Matrix user ID of binding to be removed
             threepid (dict): Dict with medium & address of binding to be removed
 
+        Raises:
+            SynapseError: If we failed to contact the identity server
+
         Returns:
-            Deferred[bool]: True on success, otherwise False
+            Deferred[bool]: True on success, otherwise False if the identity
+            server doesn't support unbinding
         """
         logger.debug("unbinding threepid %r from %s", threepid, mxid)
         if not self.trusted_id_servers:
@@ -175,11 +179,21 @@ class IdentityHandler(BaseHandler):
             content=content,
             destination_is=id_server,
         )
-        yield self.http_client.post_json_get_json(
-            url,
-            content,
-            headers,
-        )
+        try:
+            yield self.http_client.post_json_get_json(
+                url,
+                content,
+                headers,
+            )
+        except HttpResponseException as e:
+            if e.code in (400, 404, 501,):
+                # The remote server probably doesn't support unbinding (yet)
+                logger.warn("Received %d response while unbinding threepid", e.code)
+                defer.returnValue(False)
+            else:
+                logger.error("Failed to unbind threepid on identity server: %s", e)
+                raise SynapseError(502, "Failed to contact identity server")
+
         defer.returnValue(True)
 
     @defer.inlineCallbacks
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 01a362360e..893c9bcdc4 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -25,7 +25,13 @@ from twisted.internet import defer
 from twisted.internet.defer import succeed
 
 from synapse.api.constants import MAX_DEPTH, EventTypes, Membership
-from synapse.api.errors import AuthError, Codes, ConsentNotGivenError, SynapseError
+from synapse.api.errors import (
+    AuthError,
+    Codes,
+    ConsentNotGivenError,
+    NotFoundError,
+    SynapseError,
+)
 from synapse.api.urls import ConsentURIBuilder
 from synapse.crypto.event_signing import add_hashes_and_signatures
 from synapse.events.utils import serialize_event
@@ -36,6 +42,7 @@ from synapse.util.async_helpers import Linearizer
 from synapse.util.frozenutils import frozendict_json_encoder
 from synapse.util.logcontext import run_in_background
 from synapse.util.metrics import measure_func
+from synapse.visibility import filter_events_for_client
 
 from ._base import BaseHandler
 
@@ -82,28 +89,85 @@ class MessageHandler(object):
         defer.returnValue(data)
 
     @defer.inlineCallbacks
-    def get_state_events(self, user_id, room_id, is_guest=False):
+    def get_state_events(
+        self, user_id, room_id, types=None, filtered_types=None,
+        at_token=None, is_guest=False,
+    ):
         """Retrieve all state events for a given room. If the user is
         joined to the room then return the current state. If the user has
-        left the room return the state events from when they left.
+        left the room return the state events from when they left. If an explicit
+        'at' parameter is passed, return the state events as of that event, if
+        visible.
 
         Args:
             user_id(str): The user requesting state events.
             room_id(str): The room ID to get all state events from.
+            types(list[(str, str|None)]|None): List of (type, state_key) tuples
+                which are used to filter the state fetched. If `state_key` is None,
+                all events are returned of the given type.
+                May be None, which matches any key.
+            filtered_types(list[str]|None): Only apply filtering via `types` to this
+                list of event types.  Other types of events are returned unfiltered.
+                If None, `types` filtering is applied to all events.
+            at_token(StreamToken|None): the stream token of the at which we are requesting
+                the stats. If the user is not allowed to view the state as of that
+                stream token, we raise a 403 SynapseError. If None, returns the current
+                state based on the current_state_events table.
+            is_guest(bool): whether this user is a guest
         Returns:
             A list of dicts representing state events. [{}, {}, {}]
+        Raises:
+            NotFoundError (404) if the at token does not yield an event
+
+            AuthError (403) if the user doesn't have permission to view
+            members of this room.
         """
-        membership, membership_event_id = yield self.auth.check_in_room_or_world_readable(
-            room_id, user_id
-        )
+        if at_token:
+            # FIXME this claims to get the state at a stream position, but
+            # get_recent_events_for_room operates by topo ordering. This therefore
+            # does not reliably give you the state at the given stream position.
+            # (https://github.com/matrix-org/synapse/issues/3305)
+            last_events, _ = yield self.store.get_recent_events_for_room(
+                room_id, end_token=at_token.room_key, limit=1,
+            )
 
-        if membership == Membership.JOIN:
-            room_state = yield self.state.get_current_state(room_id)
-        elif membership == Membership.LEAVE:
-            room_state = yield self.store.get_state_for_events(
-                [membership_event_id], None
+            if not last_events:
+                raise NotFoundError("Can't find event for token %s" % (at_token, ))
+
+            visible_events = yield filter_events_for_client(
+                self.store, user_id, last_events,
+            )
+
+            event = last_events[0]
+            if visible_events:
+                room_state = yield self.store.get_state_for_events(
+                    [event.event_id], types, filtered_types=filtered_types,
+                )
+                room_state = room_state[event.event_id]
+            else:
+                raise AuthError(
+                    403,
+                    "User %s not allowed to view events in room %s at token %s" % (
+                        user_id, room_id, at_token,
+                    )
+                )
+        else:
+            membership, membership_event_id = (
+                yield self.auth.check_in_room_or_world_readable(
+                    room_id, user_id,
+                )
             )
-            room_state = room_state[membership_event_id]
+
+            if membership == Membership.JOIN:
+                state_ids = yield self.store.get_filtered_current_state_ids(
+                    room_id, types, filtered_types=filtered_types,
+                )
+                room_state = yield self.store.get_events(state_ids.values())
+            elif membership == Membership.LEAVE:
+                room_state = yield self.store.get_state_for_events(
+                    [membership_event_id], types, filtered_types=filtered_types,
+                )
+                room_state = room_state[membership_event_id]
 
         now = self.clock.time_msec()
         defer.returnValue(
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index 3526b20d5a..f03ee1476b 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -144,7 +144,8 @@ class RegistrationHandler(BaseHandler):
         Raises:
             RegistrationError if there was a problem registering.
         """
-        yield self._check_mau_limits()
+
+        yield self.auth.check_auth_blocking()
         password_hash = None
         if password:
             password_hash = yield self.auth_handler().hash(password)
@@ -289,7 +290,7 @@ class RegistrationHandler(BaseHandler):
                 400,
                 "User ID can only contain characters a-z, 0-9, or '=_-./'",
             )
-        yield self._check_mau_limits()
+        yield self.auth.check_auth_blocking()
         user = UserID(localpart, self.hs.hostname)
         user_id = user.to_string()
 
@@ -439,7 +440,7 @@ class RegistrationHandler(BaseHandler):
         """
         if localpart is None:
             raise SynapseError(400, "Request must include user id")
-        yield self._check_mau_limits()
+        yield self.auth.check_auth_blocking()
         need_register = True
 
         try:
@@ -533,14 +534,3 @@ class RegistrationHandler(BaseHandler):
             remote_room_hosts=remote_room_hosts,
             action="join",
         )
-
-    @defer.inlineCallbacks
-    def _check_mau_limits(self):
-        """
-        Do not accept registrations if monthly active user limits exceeded
-         and limiting is enabled
-        """
-        try:
-            yield self.auth.check_auth_blocking()
-        except AuthError as e:
-            raise RegistrationError(e.code, str(e), e.errcode)
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index 6393a9674b..3b21a04a5d 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -191,6 +191,7 @@ class SyncHandler(object):
         self.clock = hs.get_clock()
         self.response_cache = ResponseCache(hs, "sync")
         self.state = hs.get_state_handler()
+        self.auth = hs.get_auth()
 
         # ExpiringCache((User, Device)) -> LruCache(state_key => event_id)
         self.lazy_loaded_members_cache = ExpiringCache(
@@ -198,19 +199,27 @@ class SyncHandler(object):
             max_len=0, expiry_ms=LAZY_LOADED_MEMBERS_CACHE_MAX_AGE,
         )
 
+    @defer.inlineCallbacks
     def wait_for_sync_for_user(self, sync_config, since_token=None, timeout=0,
                                full_state=False):
         """Get the sync for a client if we have new data for it now. Otherwise
         wait for new data to arrive on the server. If the timeout expires, then
         return an empty sync result.
         Returns:
-            A Deferred SyncResult.
+            Deferred[SyncResult]
         """
-        return self.response_cache.wrap(
+        # If the user is not part of the mau group, then check that limits have
+        # not been exceeded (if not part of the group by this point, almost certain
+        # auth_blocking will occur)
+        user_id = sync_config.user.to_string()
+        yield self.auth.check_auth_blocking(user_id)
+
+        res = yield self.response_cache.wrap(
             sync_config.request_key,
             self._wait_for_sync_for_user,
             sync_config, since_token, timeout, full_state,
         )
+        defer.returnValue(res)
 
     @defer.inlineCallbacks
     def _wait_for_sync_for_user(self, sync_config, since_token, timeout,