Merge remote-tracking branch 'origin/develop' into dbkr/unbind

24 files changed, 485 insertions, 74 deletions

diff --git a/CHANGES.rst b/CHANGES.rst
index 851cb9b2d7..0569b581db 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,59 @@
+Changes in synapse v0.30.0 (2018-05-24)
+==========================================
+
+'Server Notices' are a new feature introduced in Synapse 0.30. They provide a
+channel whereby server administrators can send messages to users on the server.
+
+They are used as part of communication of the server policies (see ``docs/consent_tracking.md``),
+however the intention is that they may also find a use for features such
+as "Message of the day".
+
+This feature is specific to Synapse, but uses standard Matrix communication mechanisms,
+so should work with any Matrix client. For more details see ``docs/server_notices.md``
+
+Further Server Notices/Consent Tracking Support:
+
+* Allow overriding the server_notices user's avatar (PR #3273)
+* Use the localpart in the consent uri (PR #3272)
+* Support for putting %(consent_uri)s in messages (PR #3271)
+* Block attempts to send server notices to remote users (PR #3270)
+* Docs on consent bits (PR #3268)
+
+
+
+Changes in synapse v0.30.0-rc1 (2018-05-23)
+==========================================
+
+Server Notices/Consent Tracking Support:
+
+* ConsentResource to gather policy consent from users (PR #3213)
+* Move RoomCreationHandler out of synapse.handlers.Handlers (PR #3225)
+* Infrastructure for a server notices room (PR #3232)
+* Send users a server notice about consent (PR #3236)
+* Reject attempts to send event before privacy consent is given (PR #3257)
+* Add a 'has_consented' template var to consent forms (PR #3262)
+* Fix dependency on jinja2 (PR #3263)
+
+Features:
+
+* Cohort analytics (PR #3163, #3241, #3251)
+* Add lxml to docker image for web previews (PR #3239) Thanks to @ptman!
+* Add in flight request metrics (PR #3252)
+
+Changes:
+
+* Remove unused `update_external_syncs` (PR #3233)
+* Use stream rather depth ordering for push actions (PR #3212)
+* Make purge_history operate on tokens (PR #3221)
+* Don't support limitless pagination (PR #3265)
+
+Bug Fixes:
+
+* Fix logcontext resource usage tracking (PR #3258)
+* Fix error in handling receipts (PR #3235)
+* Stop the transaction cache caching failures (PR #3255)
+
+
 Changes in synapse v0.29.1 (2018-05-17)
 ==========================================
 Changes:
diff --git a/docs/consent_tracking.md b/docs/consent_tracking.md
new file mode 100644
index 0000000000..064eae82f7
--- /dev/null
+++ b/docs/consent_tracking.md
@@ -0,0 +1,160 @@
+Support in Synapse for tracking agreement to server terms and conditions
+========================================================================
+
+Synapse 0.30 introduces support for tracking whether users have agreed to the
+terms and conditions set by the administrator of a server - and blocking access
+to the server until they have.
+
+There are several parts to this functionality; each requires some specific
+configuration in `homeserver.yaml` to be enabled.
+
+Note that various parts of the configuation and this document refer to the
+"privacy policy": agreement with a privacy policy is one particular use of this
+feature, but of course adminstrators can specify other terms and conditions
+unrelated to "privacy" per se.
+
+Collecting policy agreement from a user
+---------------------------------------
+
+Synapse can be configured to serve the user a simple policy form with an
+"accept" button. Clicking "Accept" records the user's acceptance in the
+database and shows a success page.
+
+To enable this, first create templates for the policy and success pages.
+These should be stored on the local filesystem.
+
+These templates use the [Jinja2](http://jinja.pocoo.org) templating language,
+and [docs/privacy_policy_templates](privacy_policy_templates) gives
+examples of the sort of thing that can be done.
+
+Note that the templates must be stored under a name giving the language of the
+template - currently this must always be `en` (for "English");
+internationalisation support is intended for the future.
+
+The template for the policy itself should be versioned and named according to 
+the version: for example `1.0.html`. The version of the policy which the user
+has agreed to is stored in the database.
+
+Once the templates are in place, make the following changes to `homeserver.yaml`:
+
+ 1. Add a `user_consent` section, which should look like:
+
+    ```yaml
+    user_consent:
+      template_dir: privacy_policy_templates
+      version: 1.0
+    ```
+
+    `template_dir` points to the directory containing the policy
+    templates. `version` defines the version of the policy which will be served
+    to the user. In the example above, Synapse will serve
+    `privacy_policy_templates/en/1.0.html`.
+
+
+ 2. Add a `form_secret` setting at the top level:
+
+
+    ```yaml
+    form_secret: "<unique secret>"
+    ```
+
+    This should be set to an arbitrary secret string (try `pwgen -y 30` to
+    generate suitable secrets).
+
+    More on what this is used for below.
+
+ 3. Add `consent` wherever the `client` resource is currently enabled in the
+    `listeners` configuration. For example:
+
+    ```yaml
+    listeners:
+      - port: 8008
+        resources:
+          - names:
+            - client
+            - consent
+    ```
+
+
+Finally, ensure that `jinja2` is installed. If you are using a virtualenv, this
+should be a matter of `pip install Jinja2`. On debian, try `apt-get install
+python-jinja2`.
+
+Once this is complete, and the server has been restarted, try visiting
+`https://<server>/_matrix/consent`. If correctly configured, this should give
+an error "Missing string query parameter 'u'". It is now possible to manually
+construct URIs where users can give their consent.
+
+### Constructing the consent URI
+
+It may be useful to manually construct the "consent URI" for a given user - for
+instance, in order to send them an email asking them to consent. To do this,
+take the base `https://<server>/_matrix/consent` URL and add the following
+query parameters:
+
+ * `u`: the user id of the user. This can either be a full MXID
+   (`@user:server.com`) or just the localpart (`user`).
+
+ * `h`: hex-encoded HMAC-SHA256 of `u` using the `form_secret` as a key. It is
+   possible to calculate this on the commandline with something like:
+
+   ```bash
+   echo -n '<user>' | openssl sha256 -hmac '<form_secret>'
+   ```
+
+   This should result in a URI which looks something like:
+   `https://<server>/_matrix/consent?u=<user>&h=68a152465a4d...`.
+
+
+Sending users a server notice asking them to agree to the policy
+----------------------------------------------------------------
+
+It is possible to configure Synapse to send a [server
+notice](server_notices.md) to anybody who has not yet agreed to the current
+version of the policy. To do so:
+
+ * ensure that the consent resource is configured, as in the previous section
+
+ * ensure that server notices are configured, as in [server_notices.md](server_notices.md).
+
+ * Add `server_notice_content` under `user_consent` in `homeserver.yaml`. For
+   example:
+
+   ```yaml
+   user_consent:
+     server_notice_content:
+       msgtype: m.text
+       body: >-
+         Please give your consent to the privacy policy at %(consent_uri)s.
+   ```
+
+   Synapse automatically replaces the placeholder `%(consent_uri)s` with the
+   consent uri for that user.
+
+ * ensure that `public_baseurl` is set in `homeserver.yaml`, and gives the base
+   URI that clients use to connect to the server. (It is used to construct
+   `consent_uri` in the server notice.)
+
+
+Blocking users from using the server until they agree to the policy
+-------------------------------------------------------------------
+
+Synapse can be configured to block any attempts to join rooms or send messages
+until the user has given their agreement to the policy. (Joining the server
+notices room is exempted from this).
+
+To enable this, add `block_events_error` under `user_consent`. For example:
+
+```yaml
+user_consent:
+  block_events_error: >-
+    You can't send any messages until you consent to the privacy policy at
+    %(consent_uri)s.
+```
+
+Synapse automatically replaces the placeholder `%(consent_uri)s` with the
+consent uri for that user.
+
+ensure that `public_baseurl` is set in `homeserver.yaml`, and gives the base
+URI that clients use to connect to the server. (It is used to construct
+`consent_uri` in the error.)
diff --git a/docs/manhole.md b/docs/manhole.md
new file mode 100644
index 0000000000..7375f5ad46
--- /dev/null
+++ b/docs/manhole.md
@@ -0,0 +1,43 @@
+Using the synapse manhole
+=========================
+
+The "manhole" allows server administrators to access a Python shell on a running
+Synapse installation. This is a very powerful mechanism for administration and
+debugging.
+
+To enable it, first uncomment the `manhole` listener configuration in
+`homeserver.yaml`:
+
+```yaml
+listeners:
+  - port: 9000
+    bind_addresses: ['::1', '127.0.0.1']
+    type: manhole
+```
+
+(`bind_addresses` in the above is important: it ensures that access to the
+manhole is only possible for local users).
+
+Note that this will give administrative access to synapse to **all users** with
+shell access to the server. It should therefore **not** be enabled in
+environments where untrusted users have shell access.
+
+Then restart synapse, and point an ssh client at port 9000 on localhost, using
+the username `matrix`:
+
+```bash
+ssh -p9000 matrix@localhost
+```
+
+The password is `rabbithole`.
+
+This gives a Python REPL in which `hs` gives access to the
+`synapse.server.HomeServer` object - which in turn gives access to many other
+parts of the process.
+
+As a simple example, retrieving an event from the database:
+
+```
+>>> hs.get_datastore().get_event('$1416420717069yeQaw:matrix.org')
+<Deferred at 0x7ff253fc6998 current result: <FrozenEvent event_id='$1416420717069yeQaw:matrix.org', type='m.room.create', state_key=''>>
+```
diff --git a/docs/privacy_policy_templates/README.md b/docs/privacy_policy_templates/README.md
deleted file mode 100644
index a3e6fc0986..0000000000
--- a/docs/privacy_policy_templates/README.md
+++ /dev/null
@@ -1,23 +0,0 @@
-If enabling the 'consent' resource in synapse, you will need some templates
-for the HTML to be served to the user. This directory contains very simple
-examples of the sort of thing that can be done.
-
-You'll need to add this sort of thing to your homeserver.yaml:
-
-```
-form_secret: <unique but arbitrary secret>
-
-user_consent:
-  template_dir: docs/privacy_policy_templates
-  version: 1.0
-```
-
-You should then be able to enable the `consent` resource under a `listener`
-entry. For example:
-
-```
-listeners:
-  - port: 8008
-    resources:
-      - names: [client, consent]
-```
diff --git a/docs/server_notices.md b/docs/server_notices.md
new file mode 100644
index 0000000000..221553b24d
--- /dev/null
+++ b/docs/server_notices.md
@@ -0,0 +1,71 @@
+Server Notices
+==============
+
+'Server Notices' are a new feature introduced in Synapse 0.30. They provide a
+channel whereby server administrators can send messages to users on the server.
+
+They are used as part of communication of the server polices(see
+[consent_tracking.md](consent_tracking.md)), however the intention is that 
+they may also find a use for features such as "Message of the day".
+
+This is a feature specific to Synapse, but it uses standard Matrix
+communication mechanisms, so should work with any Matrix client.
+
+User experience
+---------------
+
+When the user is first sent a server notice, they will get an invitation to a
+room (typically called 'Server Notices', though this is configurable in
+`homeserver.yaml`). They will be **unable to reject** this invitation -
+attempts to do so will receive an error.
+
+Once they accept the invitation, they will see the notice message in the room
+history; it will appear to have come from the 'server notices user' (see
+below).
+
+The user is prevented from sending any messages in this room by the power
+levels. They also cannot leave it.
+
+Synapse configuration
+---------------------
+
+Server notices come from a specific user id on the server. Server
+administrators are free to choose the user id - something like `server` is
+suggested, meaning the notices will come from
+`@server:<your_server_name>`. Once the Server Notices user is configured, that
+user id becomes a special, privileged user, so administrators should ensure
+that **it is not already allocated**.
+
+In order to support server notices, it is necessary to add some configuration
+to the `homeserver.yaml` file. In particular, you should add a `server_notices`
+section, which should look like this:
+
+```yaml
+server_notices:
+   system_mxid_localpart: server
+   system_mxid_display_name: "Server Notices"
+   system_mxid_avatar_url: "mxc://server.com/oumMVlgDnLYFaPVkExemNVVZ"
+   room_name: "Server Notices"
+```
+
+The only compulsory setting is `system_mxid_localpart`, which defines the user
+id of the Server Notices user, as above. `room_name` defines the name of the
+room which will be created.
+
+`system_mxid_display_name` and `system_mxid_avatar_url` can be used to set the
+displayname and avatar of the Server Notices user.
+
+Sending notices
+---------------
+
+As of the current version of synapse, there is no convenient interface for
+sending notices (other than the automated ones sent as part of consent
+tracking).
+
+In the meantime, it is possible to test this feature using the manhole. Having
+gone into the manhole as described in [manhole.md](manhole.md), a notice can be
+sent with something like:
+
+```
+>>> hs.get_server_notices_manager().send_notice('@user:server.com', {'msgtype':'m.text', 'body':'foo'})
+```
diff --git a/synapse/__init__.py b/synapse/__init__.py
index b11a1d3ea3..5bada5e290 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -16,4 +16,4 @@
 """ This is a reference implementation of a Matrix home server.
 """
 
-__version__ = "0.29.1"
+__version__ = "0.30.0"
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index aca804280c..e6ad3768f0 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -53,6 +53,7 @@ class Codes(object):
     INVALID_USERNAME = "M_INVALID_USERNAME"
     SERVER_NOT_TRUSTED = "M_SERVER_NOT_TRUSTED"
     CONSENT_NOT_GIVEN = "M_CONSENT_NOT_GIVEN"
+    CANNOT_LEAVE_SERVER_NOTICE_ROOM = "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM"
 
 
 class CodeMessageException(RuntimeError):
diff --git a/synapse/config/consent_config.py b/synapse/config/consent_config.py
index 44c4711e6c..ddcd305f4c 100644
--- a/synapse/config/consent_config.py
+++ b/synapse/config/consent_config.py
@@ -43,10 +43,13 @@ DEFAULT_CONFIG = """\
 #   version: 1.0
 #   server_notice_content:
 #     msgtype: m.text
-#     body: |
-#       Pls do consent kthx
-#   block_events_error: |
-#     You can't send any messages until you consent to the privacy policy.
+#     body: >-
+#       To continue using this homeserver you must review and agree to the
+#       terms and conditions at %(consent_uri)s
+#   block_events_error: >-
+#     To continue using this homeserver you must review and agree to the
+#     terms and conditions at %(consent_uri)s
+#
 """
 
 
diff --git a/synapse/config/server_notices_config.py b/synapse/config/server_notices_config.py
index ccef8d2ec5..be1d1f762c 100644
--- a/synapse/config/server_notices_config.py
+++ b/synapse/config/server_notices_config.py
@@ -26,12 +26,13 @@ DEFAULT_CONFIG = """\
 # setting, which defines the id of the user which will be used to send the
 # notices.
 #
-# It's also possible to override the room name, or the display name of the
-# "notices" user.
+# It's also possible to override the room name, the display name of the
+# "notices" user, and the avatar for the user.
 #
 # server_notices:
 #   system_mxid_localpart: notices
 #   system_mxid_display_name: "Server Notices"
+#   system_mxid_avatar_url: "mxc://server.com/oumMVlgDnLYFaPVkExemNVVZ"
 #   room_name: "Server Notices"
 """
 
@@ -48,6 +49,10 @@ class ServerNoticesConfig(Config):
             The display name to use for the server notices user.
             None if server notices are not enabled.
 
+        server_notices_mxid_avatar_url (str|None):
+            The display name to use for the server notices user.
+            None if server notices are not enabled.
+
         server_notices_room_name (str|None):
             The name to use for the server notices room.
             None if server notices are not enabled.
@@ -56,6 +61,7 @@ class ServerNoticesConfig(Config):
         super(ServerNoticesConfig, self).__init__()
         self.server_notices_mxid = None
         self.server_notices_mxid_display_name = None
+        self.server_notices_mxid_avatar_url = None
         self.server_notices_room_name = None
 
     def read_config(self, config):
@@ -68,7 +74,10 @@ class ServerNoticesConfig(Config):
             mxid_localpart, self.server_name,
         ).to_string()
         self.server_notices_mxid_display_name = c.get(
-            'system_mxid_display_name', 'Server Notices',
+            'system_mxid_display_name', None,
+        )
+        self.server_notices_mxid_avatar_url = c.get(
+            'system_mxid_avatar_url', None,
         )
         # todo: i18n
         self.server_notices_room_name = c.get('room_name', "Server Notices")
diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 824f4a42e3..29ae086786 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -20,6 +20,8 @@ from frozendict import frozendict
 
 import re
 
+from six import string_types
+
 # Split strings on "." but not "\." This uses a negative lookbehind assertion for '\'
 # (?<!stuff) matches if the current position in the string is not preceded
 # by a match for 'stuff'.
@@ -277,7 +279,7 @@ def serialize_event(e, time_now_ms, as_client_event=True,
 
     if only_event_fields:
         if (not isinstance(only_event_fields, list) or
-                not all(isinstance(f, basestring) for f in only_event_fields)):
+                not all(isinstance(f, string_types) for f in only_event_fields)):
             raise TypeError("only_event_fields must be a list of strings")
         d = only_fields(d, only_event_fields)
 
diff --git a/synapse/events/validator.py b/synapse/events/validator.py
index 2f4c8a1018..e0e5bf818c 100644
--- a/synapse/events/validator.py
+++ b/synapse/events/validator.py
@@ -17,6 +17,8 @@ from synapse.types import EventID, RoomID, UserID
 from synapse.api.errors import SynapseError
 from synapse.api.constants import EventTypes, Membership
 
+from six import string_types
+
 
 class EventValidator(object):
 
@@ -49,7 +51,7 @@ class EventValidator(object):
             strings.append("state_key")
 
         for s in strings:
-            if not isinstance(getattr(event, s), basestring):
+            if not isinstance(getattr(event, s), string_types):
                 raise SynapseError(400, "Not '%s' a string type" % (s,))
 
         if event.type == EventTypes.Member:
@@ -88,5 +90,5 @@ class EventValidator(object):
         for s in keys:
             if s not in d:
                 raise SynapseError(400, "'%s' not in content" % (s,))
-            if not isinstance(d[s], basestring):
+            if not isinstance(d[s], string_types):
                 raise SynapseError(400, "Not '%s' a string type" % (s,))
diff --git a/synapse/groups/groups_server.py b/synapse/groups/groups_server.py
index 2d95b04e0c..62d20ad130 100644
--- a/synapse/groups/groups_server.py
+++ b/synapse/groups/groups_server.py
@@ -20,6 +20,8 @@ from synapse.api.errors import SynapseError
 from synapse.types import GroupID, RoomID, UserID, get_domain_from_id
 from twisted.internet import defer
 
+from six import string_types
+
 logger = logging.getLogger(__name__)
 
 
@@ -431,7 +433,7 @@ class GroupsServerHandler(object):
                         "long_description"):
             if keyname in content:
                 value = content[keyname]
-                if not isinstance(value, basestring):
+                if not isinstance(value, string_types):
                     raise SynapseError(400, "%r value is not a string" % (keyname,))
                 profile[keyname] = value
 
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py
index f92f953a79..ce6e2b14fe 100644
--- a/synapse/handlers/deactivate_account.py
+++ b/synapse/handlers/deactivate_account.py
@@ -32,6 +32,7 @@ class DeactivateAccountHandler(BaseHandler):
         self._device_handler = hs.get_device_handler()
         self._room_member_handler = hs.get_room_member_handler()
         self._identity_handler = hs.get_handlers().identity_handler
+        self.user_directory_handler = hs.get_user_directory_handler()
 
         # Flag that indicates whether the process to part users from rooms is running
         self._user_parter_running = False
@@ -88,6 +89,9 @@ class DeactivateAccountHandler(BaseHandler):
         # removal from all the rooms they're a member of)
         yield self.store.add_user_pending_deactivation(user_id)
 
+        # delete from user directory
+        yield self.user_directory_handler.handle_user_deactivated(user_id)
+
         # Now start the process that goes through that list and
         # parts users from rooms (if it isn't already running)
         self._start_user_parting()
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index ba3ede8024..2c72beff2e 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -479,18 +479,18 @@ class FederationHandler(BaseHandler):
         # to get all state ids that we're interested in.
         event_map = yield self.store.get_events([
             e_id
-            for key_to_eid in event_to_state_ids.values()
-            for key, e_id in key_to_eid.items()
+            for key_to_eid in event_to_state_ids.itervalues()
+            for key, e_id in key_to_eid.iteritems()
             if key[0] != EventTypes.Member or check_match(key[1])
         ])
 
         event_to_state = {
             e_id: {
                 key: event_map[inner_e_id]
-                for key, inner_e_id in key_to_eid.items()
+                for key, inner_e_id in key_to_eid.iteritems()
                 if inner_e_id in event_map
             }
-            for e_id, key_to_eid in event_to_state_ids.items()
+            for e_id, key_to_eid in event_to_state_ids.iteritems()
         }
 
         def redact_disallowed(event, state):
@@ -505,7 +505,7 @@ class FederationHandler(BaseHandler):
                     # membership states for the requesting server to determine
                     # if the server is either in the room or has been invited
                     # into the room.
-                    for ev in state.values():
+                    for ev in state.itervalues():
                         if ev.type != EventTypes.Member:
                             continue
                         try:
@@ -751,9 +751,19 @@ class FederationHandler(BaseHandler):
         curr_state = yield self.state_handler.get_current_state(room_id)
 
         def get_domains_from_state(state):
+            """Get joined domains from state
+
+            Args:
+                state (dict[tuple, FrozenEvent]): State map from type/state
+                    key to event.
+
+            Returns:
+                list[tuple[str, int]]: Returns a list of servers with the
+                lowest depth of their joins. Sorted by lowest depth first.
+            """
             joined_users = [
                 (state_key, int(event.depth))
-                for (e_type, state_key), event in state.items()
+                for (e_type, state_key), event in state.iteritems()
                 if e_type == EventTypes.Member
                 and event.membership == Membership.JOIN
             ]
@@ -770,7 +780,7 @@ class FederationHandler(BaseHandler):
                 except Exception:
                     pass
 
-            return sorted(joined_domains.items(), key=lambda d: d[1])
+            return sorted(joined_domains.iteritems(), key=lambda d: d[1])
 
         curr_domains = get_domains_from_state(curr_state)
 
@@ -787,7 +797,7 @@ class FederationHandler(BaseHandler):
                     yield self.backfill(
                         dom, room_id,
                         limit=100,
-                        extremities=[e for e in extremities.keys()]
+                        extremities=extremities,
                     )
                     # If this succeeded then we probably already have the
                     # appropriate stuff.
@@ -833,7 +843,7 @@ class FederationHandler(BaseHandler):
         tried_domains = set(likely_domains)
         tried_domains.add(self.server_name)
 
-        event_ids = list(extremities.keys())
+        event_ids = list(extremities.iterkeys())
 
         logger.debug("calling resolve_state_groups in _maybe_backfill")
         resolve = logcontext.preserve_fn(
@@ -843,31 +853,34 @@ class FederationHandler(BaseHandler):
             [resolve(room_id, [e]) for e in event_ids],
             consumeErrors=True,
         ))
+
+        # dict[str, dict[tuple, str]], a map from event_id to state map of
+        # event_ids.
         states = dict(zip(event_ids, [s.state for s in states]))
 
         state_map = yield self.store.get_events(
-            [e_id for ids in states.values() for e_id in ids],
+            [e_id for ids in states.itervalues() for e_id in ids.itervalues()],
             get_prev_content=False
         )
         states = {
             key: {
                 k: state_map[e_id]
-                for k, e_id in state_dict.items()
+                for k, e_id in state_dict.iteritems()
                 if e_id in state_map
-            } for key, state_dict in states.items()
+            } for key, state_dict in states.iteritems()
         }
 
         for e_id, _ in sorted_extremeties_tuple:
             likely_domains = get_domains_from_state(states[e_id])
 
             success = yield try_backfill([
-                dom for dom in likely_domains
+                dom for dom, _ in likely_domains
                 if dom not in tried_domains
             ])
             if success:
                 defer.returnValue(True)
 
-            tried_domains.update(likely_domains)
+            tried_domains.update(dom for dom, _ in likely_domains)
 
         defer.returnValue(False)
 
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index c3adbc6c95..c32b9bcae4 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -574,9 +574,14 @@ class EventCreationHandler(object):
         if u["consent_version"] == self.config.user_consent_version:
             return
 
-        consent_uri = self._consent_uri_builder.build_user_consent_uri(user_id)
+        consent_uri = self._consent_uri_builder.build_user_consent_uri(
+            requester.user.localpart,
+        )
+        msg = self.config.block_events_without_consent_error % {
+            'consent_uri': consent_uri,
+        }
         raise ConsentNotGivenError(
-            msg=self.config.block_events_without_consent_error,
+            msg=msg,
             consent_uri=consent_uri,
         )
 
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 5263f09aaa..82adfc8fdf 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -306,6 +306,7 @@ class RoomMemberHandler(object):
                 raise SynapseError(
                     http_client.FORBIDDEN,
                     "You cannot leave this room",
+                    errcode=Codes.CANNOT_LEAVE_SERVER_NOTICE_ROOM,
                 )
 
         if effective_membership_state == Membership.INVITE:
diff --git a/synapse/handlers/user_directory.py b/synapse/handlers/user_directory.py
index 714f0195c8..2f73d664f9 100644
--- a/synapse/handlers/user_directory.py
+++ b/synapse/handlers/user_directory.py
@@ -123,6 +123,13 @@ class UserDirectoryHandler(object):
         )
 
     @defer.inlineCallbacks
+    def handle_user_deactivated(self, user_id):
+        """Called when a user ID is deactivated
+        """
+        yield self.store.remove_from_user_dir(user_id)
+        yield self.store.remove_from_user_in_public_room(user_id)
+
+    @defer.inlineCallbacks
     def _unsafe_process(self):
         # If self.pos is None then means we haven't fetched it from DB
         if self.pos is None:
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index 21eaf77dc4..c7f919498c 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -42,6 +42,8 @@ import random
 import sys
 import urllib
 from six.moves.urllib import parse as urlparse
+from six import string_types
+
 
 logger = logging.getLogger(__name__)
 outbound_logger = logging.getLogger("synapse.http.outbound")
@@ -558,7 +560,7 @@ class MatrixFederationHttpClient(object):
 
         encoded_args = {}
         for k, vs in args.items():
-            if isinstance(vs, basestring):
+            if isinstance(vs, string_types):
                 vs = [vs]
             encoded_args[k] = [v.encode("UTF-8") for v in vs]
 
@@ -673,7 +675,7 @@ def check_content_type_is_json(headers):
         RuntimeError if the
 
     """
-    c_type = headers.getRawHeaders("Content-Type")
+    c_type = headers.getRawHeaders(b"Content-Type")
     if c_type is None:
         raise RuntimeError(
             "No Content-Type header"
@@ -690,7 +692,7 @@ def check_content_type_is_json(headers):
 def encode_query_args(args):
     encoded_args = {}
     for k, vs in args.items():
-        if isinstance(vs, basestring):
+        if isinstance(vs, string_types):
             vs = [vs]
         encoded_args[k] = [v.encode("UTF-8") for v in vs]
 
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index 3601f2d365..d55efde8cc 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -21,6 +21,8 @@ from synapse.types import UserID
 from synapse.util.caches import CACHE_SIZE_FACTOR, register_cache
 from synapse.util.caches.lrucache import LruCache
 
+from six import string_types
+
 logger = logging.getLogger(__name__)
 
 
@@ -238,7 +240,7 @@ def _flatten_dict(d, prefix=[], result=None):
     if result is None:
         result = {}
     for key, value in d.items():
-        if isinstance(value, basestring):
+        if isinstance(value, string_types):
             result[".".join(prefix + [key])] = value.lower()
         elif hasattr(value, "items"):
             _flatten_dict(value, prefix=(prefix + [key]), result=result)
diff --git a/synapse/rest/client/v1/presence.py b/synapse/rest/client/v1/presence.py
index 4a73813c58..647994bd53 100644
--- a/synapse/rest/client/v1/presence.py
+++ b/synapse/rest/client/v1/presence.py
@@ -23,6 +23,8 @@ from synapse.handlers.presence import format_user_presence_state
 from synapse.http.servlet import parse_json_object_from_request
 from .base import ClientV1RestServlet, client_path_patterns
 
+from six import string_types
+
 import logging
 
 logger = logging.getLogger(__name__)
@@ -71,7 +73,7 @@ class PresenceStatusRestServlet(ClientV1RestServlet):
 
             if "status_msg" in content:
                 state["status_msg"] = content.pop("status_msg")
-                if not isinstance(state["status_msg"], basestring):
+                if not isinstance(state["status_msg"], string_types):
                     raise SynapseError(400, "status_msg must be a string.")
 
             if content:
@@ -129,7 +131,7 @@ class PresenceListRestServlet(ClientV1RestServlet):
 
         if "invite" in content:
             for u in content["invite"]:
-                if not isinstance(u, basestring):
+                if not isinstance(u, string_types):
                     raise SynapseError(400, "Bad invite value.")
                 if len(u) == 0:
                     continue
@@ -140,7 +142,7 @@ class PresenceListRestServlet(ClientV1RestServlet):
 
         if "drop" in content:
             for u in content["drop"]:
-                if not isinstance(u, basestring):
+                if not isinstance(u, string_types):
                     raise SynapseError(400, "Bad drop value.")
                 if len(u) == 0:
                     continue
diff --git a/synapse/server_notices/consent_server_notices.py b/synapse/server_notices/consent_server_notices.py
index 440f6b1cd4..a709802856 100644
--- a/synapse/server_notices/consent_server_notices.py
+++ b/synapse/server_notices/consent_server_notices.py
@@ -14,10 +14,13 @@
 # limitations under the License.
 import logging
 
+from six import (iteritems, string_types)
 from twisted.internet import defer
 
 from synapse.api.errors import SynapseError
+from synapse.api.urls import ConsentURIBuilder
 from synapse.config import ConfigError
+from synapse.types import get_localpart_from_id
 
 logger = logging.getLogger(__name__)
 
@@ -52,6 +55,8 @@ class ConsentServerNotices(object):
                     "key.",
                 )
 
+            self._consent_uri_builder = ConsentURIBuilder(hs.config)
+
     @defer.inlineCallbacks
     def maybe_send_server_notice_to_user(self, user_id):
         """Check if we need to send a notice to this user, and does so if so
@@ -81,10 +86,18 @@ class ConsentServerNotices(object):
                 # we've already sent a notice to the user
                 return
 
-            # need to send a message
+            # need to send a message.
             try:
+                consent_uri = self._consent_uri_builder.build_user_consent_uri(
+                    get_localpart_from_id(user_id),
+                )
+                content = copy_with_str_subst(
+                    self._server_notice_content, {
+                        'consent_uri': consent_uri,
+                    },
+                )
                 yield self._server_notices_manager.send_notice(
-                    user_id, self._server_notice_content,
+                    user_id, content,
                 )
                 yield self._store.user_set_consent_server_notice_sent(
                     user_id, self._current_consent_version,
@@ -93,3 +106,27 @@ class ConsentServerNotices(object):
                 logger.error("Error sending server notice about user consent: %s", e)
         finally:
             self._users_in_progress.remove(user_id)
+
+
+def copy_with_str_subst(x, substitutions):
+    """Deep-copy a structure, carrying out string substitions on any strings
+
+    Args:
+        x (object): structure to be copied
+        substitutions (object): substitutions to be made - passed into the
+            string '%' operator
+
+    Returns:
+        copy of x
+    """
+    if isinstance(x, string_types):
+        return x % substitutions
+    if isinstance(x, dict):
+        return {
+            k: copy_with_str_subst(v, substitutions) for (k, v) in iteritems(x)
+        }
+    if isinstance(x, (list, tuple)):
+        return [copy_with_str_subst(y) for y in x]
+
+    # assume it's uninterested and can be shallow-copied.
+    return x
diff --git a/synapse/server_notices/server_notices_manager.py b/synapse/server_notices/server_notices_manager.py
index f535b9c9da..a26deace53 100644
--- a/synapse/server_notices/server_notices_manager.py
+++ b/synapse/server_notices/server_notices_manager.py
@@ -35,6 +35,7 @@ class ServerNoticesManager(object):
         self._config = hs.config
         self._room_creation_handler = hs.get_room_creation_handler()
         self._event_creation_handler = hs.get_event_creation_handler()
+        self._is_mine_id = hs.is_mine_id
 
     def is_enabled(self):
         """Checks if server notices are enabled on this server.
@@ -55,7 +56,7 @@ class ServerNoticesManager(object):
             event_content (dict): content of event to send
 
         Returns:
-            Deferrred[None]
+            Deferred[None]
         """
         room_id = yield self.get_notice_room_for_user(user_id)
 
@@ -89,6 +90,9 @@ class ServerNoticesManager(object):
         if not self.is_enabled():
             raise Exception("Server notices not enabled")
 
+        assert self._is_mine_id(user_id), \
+            "Cannot send server notices to remote users"
+
         rooms = yield self._store.get_rooms_for_user_where_membership_is(
             user_id, [Membership.INVITE, Membership.JOIN],
         )
@@ -109,6 +113,19 @@ class ServerNoticesManager(object):
         # apparently no existing notice room: create a new one
         logger.info("Creating server notices room for %s", user_id)
 
+        # see if we want to override the profile info for the server user.
+        # note that if we want to override either the display name or the
+        # avatar, we have to use both.
+        join_profile = None
+        if (
+            self._config.server_notices_mxid_display_name is not None or
+            self._config.server_notices_mxid_avatar_url is not None
+        ):
+            join_profile = {
+                "displayname": self._config.server_notices_mxid_display_name,
+                "avatar_url": self._config.server_notices_mxid_avatar_url,
+            }
+
         requester = create_requester(system_mxid)
         info = yield self._room_creation_handler.create_room(
             requester,
@@ -121,9 +138,7 @@ class ServerNoticesManager(object):
                 "invite": (user_id,)
             },
             ratelimit=False,
-            creator_join_profile={
-                "displayname": self._config.server_notices_mxid_display_name,
-            },
+            creator_join_profile=join_profile,
         )
         room_id = info['room_id']
 
diff --git a/synapse/server_notices/worker_server_notices_sender.py b/synapse/server_notices/worker_server_notices_sender.py
index 25abb4ccf5..4a133026c3 100644
--- a/synapse/server_notices/worker_server_notices_sender.py
+++ b/synapse/server_notices/worker_server_notices_sender.py
@@ -32,7 +32,7 @@ class WorkerServerNoticesSender(object):
         Returns:
             Deferred
         """
-        return defer.succeed()
+        return defer.succeed(None)
 
     def on_user_ip(self, user_id):
         """Called on the master when a worker process saw a client request.
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index ea24710ad8..fb463c525a 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -684,8 +684,7 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
                 results to only those before
             direction(char): Either 'b' or 'f' to indicate whether we are
                 paginating forwards or backwards from `from_key`.
-            limit (int): The maximum number of events to return. Zero or less
-                means no limit.
+            limit (int): The maximum number of events to return.
             event_filter (Filter|None): If provided filters the events to
                 those that match the filter.
 
@@ -694,6 +693,9 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
             as a list of _EventDictReturn and a token that points to the end
             of the result set.
         """
+
+        assert int(limit) >= 0
+
         # Tokens really represent positions between elements, but we use
         # the convention of pointing to the event before the gap. Hence
         # we have a bit of asymmetry when it comes to equalities.
@@ -723,22 +725,17 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
             bounds += " AND " + filter_clause
             args.extend(filter_args)
 
-        if int(limit) > 0:
-            args.append(int(limit))
-            limit_str = " LIMIT ?"
-        else:
-            limit_str = ""
+        args.append(int(limit))
 
         sql = (
             "SELECT event_id, topological_ordering, stream_ordering"
             " FROM events"
             " WHERE outlier = ? AND room_id = ? AND %(bounds)s"
             " ORDER BY topological_ordering %(order)s,"
-            " stream_ordering %(order)s %(limit)s"
+            " stream_ordering %(order)s LIMIT ?"
         ) % {
             "bounds": bounds,
             "order": order,
-            "limit": limit_str
         }
 
         txn.execute(sql, args)