Move rest APIs back under the rest directory

26 files changed, 3059 insertions, 0 deletions

diff --git a/synapse/rest/__init__.py b/synapse/rest/__init__.py
new file mode 100644
index 0000000000..1a84d94cd9
--- /dev/null
+++ b/synapse/rest/__init__.py
@@ -0,0 +1,14 @@
+# -*- 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.
diff --git a/synapse/rest/client/__init__.py b/synapse/rest/client/__init__.py
new file mode 100644
index 0000000000..1a84d94cd9
--- /dev/null
+++ b/synapse/rest/client/__init__.py
@@ -0,0 +1,14 @@
+# -*- 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.
diff --git a/synapse/rest/client/v1/__init__.py b/synapse/rest/client/v1/__init__.py
new file mode 100644
index 0000000000..88ec9cd27d
--- /dev/null
+++ b/synapse/rest/client/v1/__init__.py
@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 . import (
+    room, events, register, login, profile, presence, initial_sync, directory,
+    voip, admin,
+)
+
+
+class RestServletFactory(object):
+
+    """ A factory for creating REST servlets.
+
+    These REST servlets represent the entire client-server REST API. Generally
+    speaking, they serve as wrappers around events and the handlers that
+    process them.
+
+    See synapse.events for information on synapse events.
+    """
+
+    def __init__(self, hs):
+        client_resource = hs.get_resource_for_client()
+
+        # TODO(erikj): There *must* be a better way of doing this.
+        room.register_servlets(hs, client_resource)
+        events.register_servlets(hs, client_resource)
+        register.register_servlets(hs, client_resource)
+        login.register_servlets(hs, client_resource)
+        profile.register_servlets(hs, client_resource)
+        presence.register_servlets(hs, client_resource)
+        initial_sync.register_servlets(hs, client_resource)
+        directory.register_servlets(hs, client_resource)
+        voip.register_servlets(hs, client_resource)
+        admin.register_servlets(hs, client_resource)
diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py
new file mode 100644
index 0000000000..0aa83514c8
--- /dev/null
+++ b/synapse/rest/client/v1/admin.py
@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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, SynapseError
+from base import RestServlet, client_path_pattern
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class WhoisRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/admin/whois/(?P<user_id>[^/]*)")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, user_id):
+        target_user = self.hs.parse_userid(user_id)
+        auth_user = yield self.auth.get_user_by_req(request)
+        is_admin = yield self.auth.is_server_admin(auth_user)
+
+        if not is_admin and target_user != auth_user:
+            raise AuthError(403, "You are not a server admin")
+
+        if not self.hs.is_mine(target_user):
+            raise SynapseError(400, "Can only whois a local user")
+
+        ret = yield self.handlers.admin_handler.get_whois(target_user)
+
+        defer.returnValue((200, ret))
+
+
+def register_servlets(hs, http_server):
+    WhoisRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/base.py b/synapse/rest/client/v1/base.py
new file mode 100644
index 0000000000..d005206b77
--- /dev/null
+++ b/synapse/rest/client/v1/base.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+""" This module contains base REST classes for constructing REST servlets. """
+from synapse.api.urls import CLIENT_PREFIX
+from .transactions import HttpTransactionStore
+import re
+
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+def client_path_pattern(path_regex):
+    """Creates a regex compiled client path with the correct client path
+    prefix.
+
+    Args:
+        path_regex (str): The regex string to match. This should NOT have a ^
+        as this will be prefixed.
+    Returns:
+        SRE_Pattern
+    """
+    return re.compile("^" + CLIENT_PREFIX + path_regex)
+
+
+class RestServlet(object):
+
+    """ A Synapse REST Servlet.
+
+    An implementing class can either provide its own custom 'register' method,
+    or use the automatic pattern handling provided by the base class.
+
+    To use this latter, the implementing class instead provides a `PATTERN`
+    class attribute containing a pre-compiled regular expression. The automatic
+    register method will then use this method to register any of the following
+    instance methods associated with the corresponding HTTP method:
+
+      on_GET
+      on_PUT
+      on_POST
+      on_DELETE
+      on_OPTIONS
+
+    Automatically handles turning CodeMessageExceptions thrown by these methods
+    into the appropriate HTTP response.
+    """
+
+    def __init__(self, hs):
+        self.hs = hs
+
+        self.handlers = hs.get_handlers()
+        self.builder_factory = hs.get_event_builder_factory()
+        self.auth = hs.get_auth()
+        self.txns = HttpTransactionStore()
+
+    def register(self, http_server):
+        """ Register this servlet with the given HTTP server. """
+        if hasattr(self, "PATTERN"):
+            pattern = self.PATTERN
+
+            for method in ("GET", "PUT", "POST", "OPTIONS", "DELETE"):
+                if hasattr(self, "on_%s" % (method)):
+                    method_handler = getattr(self, "on_%s" % (method))
+                    http_server.register_path(method, pattern, method_handler)
+        else:
+            raise NotImplementedError("RestServlet must register something.")
diff --git a/synapse/rest/client/v1/directory.py b/synapse/rest/client/v1/directory.py
new file mode 100644
index 0000000000..7ff44fdd9e
--- /dev/null
+++ b/synapse/rest/client/v1/directory.py
@@ -0,0 +1,112 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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, SynapseError, Codes
+from base import RestServlet, client_path_pattern
+
+import json
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+def register_servlets(hs, http_server):
+    ClientDirectoryServer(hs).register(http_server)
+
+
+class ClientDirectoryServer(RestServlet):
+    PATTERN = client_path_pattern("/directory/room/(?P<room_alias>[^/]*)$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_alias):
+        room_alias = self.hs.parse_roomalias(room_alias)
+
+        dir_handler = self.handlers.directory_handler
+        res = yield dir_handler.get_association(room_alias)
+
+        defer.returnValue((200, res))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_alias):
+        user = yield self.auth.get_user_by_req(request)
+
+        content = _parse_json(request)
+        if not "room_id" in content:
+            raise SynapseError(400, "Missing room_id key",
+                               errcode=Codes.BAD_JSON)
+
+        logger.debug("Got content: %s", content)
+
+        room_alias = self.hs.parse_roomalias(room_alias)
+
+        logger.debug("Got room name: %s", room_alias.to_string())
+
+        room_id = content["room_id"]
+        servers = content["servers"] if "servers" in content else None
+
+        logger.debug("Got room_id: %s", room_id)
+        logger.debug("Got servers: %s", servers)
+
+        # TODO(erikj): Check types.
+        # TODO(erikj): Check that room exists
+
+        dir_handler = self.handlers.directory_handler
+
+        try:
+            user_id = user.to_string()
+            yield dir_handler.create_association(
+                user_id, room_alias, room_id, servers
+            )
+            yield dir_handler.send_room_alias_update_event(user_id, room_id)
+        except SynapseError as e:
+            raise e
+        except:
+            logger.exception("Failed to create association")
+            raise
+
+        defer.returnValue((200, {}))
+
+    @defer.inlineCallbacks
+    def on_DELETE(self, request, room_alias):
+        user = yield self.auth.get_user_by_req(request)
+
+        is_admin = yield self.auth.is_server_admin(user)
+        if not is_admin:
+            raise AuthError(403, "You need to be a server admin")
+
+        dir_handler = self.handlers.directory_handler
+
+        room_alias = self.hs.parse_roomalias(room_alias)
+
+        yield dir_handler.delete_association(
+            user.to_string(), room_alias
+        )
+
+        defer.returnValue((200, {}))
+
+
+def _parse_json(request):
+    try:
+        content = json.loads(request.content.read())
+        if type(content) != dict:
+            raise SynapseError(400, "Content must be a JSON object.",
+                               errcode=Codes.NOT_JSON)
+        return content
+    except ValueError:
+        raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
diff --git a/synapse/rest/client/v1/events.py b/synapse/rest/client/v1/events.py
new file mode 100644
index 0000000000..c2515528ac
--- /dev/null
+++ b/synapse/rest/client/v1/events.py
@@ -0,0 +1,81 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+"""This module contains REST servlets to do with event streaming, /events."""
+from twisted.internet import defer
+
+from synapse.api.errors import SynapseError
+from synapse.streams.config import PaginationConfig
+from .base import RestServlet, client_path_pattern
+
+import logging
+
+
+logger = logging.getLogger(__name__)
+
+
+class EventStreamRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/events$")
+
+    DEFAULT_LONGPOLL_TIME_MS = 30000
+
+    @defer.inlineCallbacks
+    def on_GET(self, request):
+        auth_user = yield self.auth.get_user_by_req(request)
+        try:
+            handler = self.handlers.event_stream_handler
+            pagin_config = PaginationConfig.from_request(request)
+            timeout = EventStreamRestServlet.DEFAULT_LONGPOLL_TIME_MS
+            if "timeout" in request.args:
+                try:
+                    timeout = int(request.args["timeout"][0])
+                except ValueError:
+                    raise SynapseError(400, "timeout must be in milliseconds.")
+
+            as_client_event = "raw" not in request.args
+
+            chunk = yield handler.get_stream(
+                auth_user.to_string(), pagin_config, timeout=timeout,
+                as_client_event=as_client_event
+            )
+        except:
+            logger.exception("Event stream failed")
+            raise
+
+        defer.returnValue((200, chunk))
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+
+# TODO: Unit test gets, with and without auth, with different kinds of events.
+class EventRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/events/(?P<event_id>[^/]*)$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, event_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        handler = self.handlers.event_handler
+        event = yield handler.get_event(auth_user, event_id)
+
+        if event:
+            defer.returnValue((200, self.hs.serialize_event(event)))
+        else:
+            defer.returnValue((404, "Event not found."))
+
+
+def register_servlets(hs, http_server):
+    EventStreamRestServlet(hs).register(http_server)
+    EventRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/initial_sync.py b/synapse/rest/client/v1/initial_sync.py
new file mode 100644
index 0000000000..b13d56b286
--- /dev/null
+++ b/synapse/rest/client/v1/initial_sync.py
@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from twisted.internet import defer
+
+from synapse.streams.config import PaginationConfig
+from base import RestServlet, client_path_pattern
+
+
+# TODO: Needs unit testing
+class InitialSyncRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/initialSync$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request):
+        user = yield self.auth.get_user_by_req(request)
+        with_feedback = "feedback" in request.args
+        as_client_event = "raw" not in request.args
+        pagination_config = PaginationConfig.from_request(request)
+        handler = self.handlers.message_handler
+        content = yield handler.snapshot_all_rooms(
+            user_id=user.to_string(),
+            pagin_config=pagination_config,
+            feedback=with_feedback,
+            as_client_event=as_client_event
+        )
+
+        defer.returnValue((200, content))
+
+
+def register_servlets(hs, http_server):
+    InitialSyncRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
new file mode 100644
index 0000000000..6b8deff67b
--- /dev/null
+++ b/synapse/rest/client/v1/login.py
@@ -0,0 +1,109 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 SynapseError
+from synapse.types import UserID
+from base import RestServlet, client_path_pattern
+
+import json
+
+
+class LoginRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/login$")
+    PASS_TYPE = "m.login.password"
+
+    def on_GET(self, request):
+        return (200, {"flows": [{"type": LoginRestServlet.PASS_TYPE}]})
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        login_submission = _parse_json(request)
+        try:
+            if login_submission["type"] == LoginRestServlet.PASS_TYPE:
+                result = yield self.do_password_login(login_submission)
+                defer.returnValue(result)
+            else:
+                raise SynapseError(400, "Bad login type.")
+        except KeyError:
+            raise SynapseError(400, "Missing JSON keys.")
+
+    @defer.inlineCallbacks
+    def do_password_login(self, login_submission):
+        if not login_submission["user"].startswith('@'):
+            login_submission["user"] = UserID.create(
+                login_submission["user"], self.hs.hostname).to_string()
+
+        handler = self.handlers.login_handler
+        token = yield handler.login(
+            user=login_submission["user"],
+            password=login_submission["password"])
+
+        result = {
+            "user_id": login_submission["user"],  # may have changed
+            "access_token": token,
+            "home_server": self.hs.hostname,
+        }
+
+        defer.returnValue((200, result))
+
+
+class LoginFallbackRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/login/fallback$")
+
+    def on_GET(self, request):
+        # TODO(kegan): This should be returning some HTML which is capable of
+        # hitting LoginRestServlet
+        return (200, {})
+
+
+class PasswordResetRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/login/reset")
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        reset_info = _parse_json(request)
+        try:
+            email = reset_info["email"]
+            user_id = reset_info["user_id"]
+            handler = self.handlers.login_handler
+            yield handler.reset_password(user_id, email)
+            # purposefully give no feedback to avoid people hammering different
+            # combinations.
+            defer.returnValue((200, {}))
+        except KeyError:
+            raise SynapseError(
+                400,
+                "Missing keys. Requires 'email' and 'user_id'."
+            )
+
+
+def _parse_json(request):
+    try:
+        content = json.loads(request.content.read())
+        if type(content) != dict:
+            raise SynapseError(400, "Content must be a JSON object.")
+        return content
+    except ValueError:
+        raise SynapseError(400, "Content not JSON.")
+
+
+def register_servlets(hs, http_server):
+    LoginRestServlet(hs).register(http_server)
+    # TODO PasswordResetRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/presence.py b/synapse/rest/client/v1/presence.py
new file mode 100644
index 0000000000..ca4d2d21f0
--- /dev/null
+++ b/synapse/rest/client/v1/presence.py
@@ -0,0 +1,145 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+""" This module contains REST servlets to do with presence: /presence/<paths>
+"""
+from twisted.internet import defer
+
+from synapse.api.errors import SynapseError
+from base import RestServlet, client_path_pattern
+
+import json
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class PresenceStatusRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/presence/(?P<user_id>[^/]*)/status")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        user = self.hs.parse_userid(user_id)
+
+        state = yield self.handlers.presence_handler.get_state(
+            target_user=user, auth_user=auth_user)
+
+        defer.returnValue((200, state))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        user = self.hs.parse_userid(user_id)
+
+        state = {}
+        try:
+            content = json.loads(request.content.read())
+
+            state["presence"] = content.pop("presence")
+
+            if "status_msg" in content:
+                state["status_msg"] = content.pop("status_msg")
+                if not isinstance(state["status_msg"], basestring):
+                    raise SynapseError(400, "status_msg must be a string.")
+
+            if content:
+                raise KeyError()
+        except SynapseError as e:
+            raise e
+        except:
+            raise SynapseError(400, "Unable to parse state")
+
+        yield self.handlers.presence_handler.set_state(
+            target_user=user, auth_user=auth_user, state=state)
+
+        defer.returnValue((200, {}))
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+
+class PresenceListRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/presence/list/(?P<user_id>[^/]*)")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        user = self.hs.parse_userid(user_id)
+
+        if not self.hs.is_mine(user):
+            raise SynapseError(400, "User not hosted on this Home Server")
+
+        if auth_user != user:
+            raise SynapseError(400, "Cannot get another user's presence list")
+
+        presence = yield self.handlers.presence_handler.get_presence_list(
+            observer_user=user, accepted=True)
+
+        for p in presence:
+            observed_user = p.pop("observed_user")
+            p["user_id"] = observed_user.to_string()
+
+        defer.returnValue((200, presence))
+
+    @defer.inlineCallbacks
+    def on_POST(self, request, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        user = self.hs.parse_userid(user_id)
+
+        if not self.hs.is_mine(user):
+            raise SynapseError(400, "User not hosted on this Home Server")
+
+        if auth_user != user:
+            raise SynapseError(
+                400, "Cannot modify another user's presence list")
+
+        try:
+            content = json.loads(request.content.read())
+        except:
+            logger.exception("JSON parse error")
+            raise SynapseError(400, "Unable to parse content")
+
+        if "invite" in content:
+            for u in content["invite"]:
+                if not isinstance(u, basestring):
+                    raise SynapseError(400, "Bad invite value.")
+                if len(u) == 0:
+                    continue
+                invited_user = self.hs.parse_userid(u)
+                yield self.handlers.presence_handler.send_invite(
+                    observer_user=user, observed_user=invited_user
+                )
+
+        if "drop" in content:
+            for u in content["drop"]:
+                if not isinstance(u, basestring):
+                    raise SynapseError(400, "Bad drop value.")
+                if len(u) == 0:
+                    continue
+                dropped_user = self.hs.parse_userid(u)
+                yield self.handlers.presence_handler.drop(
+                    observer_user=user, observed_user=dropped_user
+                )
+
+        defer.returnValue((200, {}))
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+
+def register_servlets(hs, http_server):
+    PresenceStatusRestServlet(hs).register(http_server)
+    PresenceListRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/profile.py b/synapse/rest/client/v1/profile.py
new file mode 100644
index 0000000000..dc6eb424b0
--- /dev/null
+++ b/synapse/rest/client/v1/profile.py
@@ -0,0 +1,113 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+""" This module contains REST servlets to do with profile: /profile/<paths> """
+from twisted.internet import defer
+
+from base import RestServlet, client_path_pattern
+
+import json
+
+
+class ProfileDisplaynameRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/profile/(?P<user_id>[^/]*)/displayname")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, user_id):
+        user = self.hs.parse_userid(user_id)
+
+        displayname = yield self.handlers.profile_handler.get_displayname(
+            user,
+        )
+
+        defer.returnValue((200, {"displayname": displayname}))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        user = self.hs.parse_userid(user_id)
+
+        try:
+            content = json.loads(request.content.read())
+            new_name = content["displayname"]
+        except:
+            defer.returnValue((400, "Unable to parse name"))
+
+        yield self.handlers.profile_handler.set_displayname(
+            user, auth_user, new_name)
+
+        defer.returnValue((200, {}))
+
+    def on_OPTIONS(self, request, user_id):
+        return (200, {})
+
+
+class ProfileAvatarURLRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/profile/(?P<user_id>[^/]*)/avatar_url")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, user_id):
+        user = self.hs.parse_userid(user_id)
+
+        avatar_url = yield self.handlers.profile_handler.get_avatar_url(
+            user,
+        )
+
+        defer.returnValue((200, {"avatar_url": avatar_url}))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+        user = self.hs.parse_userid(user_id)
+
+        try:
+            content = json.loads(request.content.read())
+            new_name = content["avatar_url"]
+        except:
+            defer.returnValue((400, "Unable to parse name"))
+
+        yield self.handlers.profile_handler.set_avatar_url(
+            user, auth_user, new_name)
+
+        defer.returnValue((200, {}))
+
+    def on_OPTIONS(self, request, user_id):
+        return (200, {})
+
+
+class ProfileRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/profile/(?P<user_id>[^/]*)")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, user_id):
+        user = self.hs.parse_userid(user_id)
+
+        displayname = yield self.handlers.profile_handler.get_displayname(
+            user,
+        )
+        avatar_url = yield self.handlers.profile_handler.get_avatar_url(
+            user,
+        )
+
+        defer.returnValue((200, {
+            "displayname": displayname,
+            "avatar_url": avatar_url
+        }))
+
+
+def register_servlets(hs, http_server):
+    ProfileDisplaynameRestServlet(hs).register(http_server)
+    ProfileAvatarURLRestServlet(hs).register(http_server)
+    ProfileRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/register.py b/synapse/rest/client/v1/register.py
new file mode 100644
index 0000000000..e3b26902d9
--- /dev/null
+++ b/synapse/rest/client/v1/register.py
@@ -0,0 +1,291 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+"""This module contains REST servlets to do with registration: /register"""
+from twisted.internet import defer
+
+from synapse.api.errors import SynapseError, Codes
+from synapse.api.constants import LoginType
+from base import RestServlet, client_path_pattern
+import synapse.util.stringutils as stringutils
+
+from synapse.util.async import run_on_reactor
+
+from hashlib import sha1
+import hmac
+import json
+import logging
+import urllib
+
+logger = logging.getLogger(__name__)
+
+
+# We ought to be using hmac.compare_digest() but on older pythons it doesn't
+# exist. It's a _really minor_ security flaw to use plain string comparison
+# because the timing attack is so obscured by all the other code here it's
+# unlikely to make much difference
+if hasattr(hmac, "compare_digest"):
+    compare_digest = hmac.compare_digest
+else:
+    compare_digest = lambda a, b: a == b
+
+
+class RegisterRestServlet(RestServlet):
+    """Handles registration with the home server.
+
+    This servlet is in control of the registration flow; the registration
+    handler doesn't have a concept of multi-stages or sessions.
+    """
+
+    PATTERN = client_path_pattern("/register$")
+
+    def __init__(self, hs):
+        super(RegisterRestServlet, self).__init__(hs)
+        # sessions are stored as:
+        # self.sessions = {
+        #   "session_id" : { __session_dict__ }
+        # }
+        # TODO: persistent storage
+        self.sessions = {}
+
+    def on_GET(self, request):
+        if self.hs.config.enable_registration_captcha:
+            return (
+                200,
+                {"flows": [
+                    {
+                        "type": LoginType.RECAPTCHA,
+                        "stages": [
+                            LoginType.RECAPTCHA,
+                            LoginType.EMAIL_IDENTITY,
+                            LoginType.PASSWORD
+                        ]
+                    },
+                    {
+                        "type": LoginType.RECAPTCHA,
+                        "stages": [LoginType.RECAPTCHA, LoginType.PASSWORD]
+                    }
+                ]}
+            )
+        else:
+            return (
+                200,
+                {"flows": [
+                    {
+                        "type": LoginType.EMAIL_IDENTITY,
+                        "stages": [
+                            LoginType.EMAIL_IDENTITY, LoginType.PASSWORD
+                        ]
+                    },
+                    {
+                        "type": LoginType.PASSWORD
+                    }
+                ]}
+            )
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        register_json = _parse_json(request)
+
+        session = (register_json["session"]
+                   if "session" in register_json else None)
+        login_type = None
+        if "type" not in register_json:
+            raise SynapseError(400, "Missing 'type' key.")
+
+        try:
+            login_type = register_json["type"]
+            stages = {
+                LoginType.RECAPTCHA: self._do_recaptcha,
+                LoginType.PASSWORD: self._do_password,
+                LoginType.EMAIL_IDENTITY: self._do_email_identity
+            }
+
+            session_info = self._get_session_info(request, session)
+            logger.debug("%s : session info %s   request info %s",
+                         login_type, session_info, register_json)
+            response = yield stages[login_type](
+                request,
+                register_json,
+                session_info
+            )
+
+            if "access_token" not in response:
+                # isn't a final response
+                response["session"] = session_info["id"]
+
+            defer.returnValue((200, response))
+        except KeyError as e:
+            logger.exception(e)
+            raise SynapseError(400, "Missing JSON keys for login type %s." % (
+                login_type,
+            ))
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+    def _get_session_info(self, request, session_id):
+        if not session_id:
+            # create a new session
+            while session_id is None or session_id in self.sessions:
+                session_id = stringutils.random_string(24)
+            self.sessions[session_id] = {
+                "id": session_id,
+                LoginType.EMAIL_IDENTITY: False,
+                LoginType.RECAPTCHA: False
+            }
+
+        return self.sessions[session_id]
+
+    def _save_session(self, session):
+        # TODO: Persistent storage
+        logger.debug("Saving session %s", session)
+        self.sessions[session["id"]] = session
+
+    def _remove_session(self, session):
+        logger.debug("Removing session %s", session)
+        self.sessions.pop(session["id"])
+
+    @defer.inlineCallbacks
+    def _do_recaptcha(self, request, register_json, session):
+        if not self.hs.config.enable_registration_captcha:
+            raise SynapseError(400, "Captcha not required.")
+
+        yield self._check_recaptcha(request, register_json, session)
+
+        session[LoginType.RECAPTCHA] = True  # mark captcha as done
+        self._save_session(session)
+        defer.returnValue({
+            "next": [LoginType.PASSWORD, LoginType.EMAIL_IDENTITY]
+        })
+
+    @defer.inlineCallbacks
+    def _check_recaptcha(self, request, register_json, session):
+        if ("captcha_bypass_hmac" in register_json and
+                self.hs.config.captcha_bypass_secret):
+            if "user" not in register_json:
+                raise SynapseError(400, "Captcha bypass needs 'user'")
+
+            want = hmac.new(
+                key=self.hs.config.captcha_bypass_secret,
+                msg=register_json["user"],
+                digestmod=sha1,
+            ).hexdigest()
+
+            # str() because otherwise hmac complains that 'unicode' does not
+            # have the buffer interface
+            got = str(register_json["captcha_bypass_hmac"])
+
+            if compare_digest(want, got):
+                session["user"] = register_json["user"]
+                defer.returnValue(None)
+            else:
+                raise SynapseError(
+                    400, "Captcha bypass HMAC incorrect",
+                    errcode=Codes.CAPTCHA_NEEDED
+                )
+
+        challenge = None
+        user_response = None
+        try:
+            challenge = register_json["challenge"]
+            user_response = register_json["response"]
+        except KeyError:
+            raise SynapseError(400, "Captcha response is required",
+                               errcode=Codes.CAPTCHA_NEEDED)
+
+        ip_addr = self.hs.get_ip_from_request(request)
+
+        handler = self.handlers.registration_handler
+        yield handler.check_recaptcha(
+            ip_addr,
+            self.hs.config.recaptcha_private_key,
+            challenge,
+            user_response
+        )
+
+    @defer.inlineCallbacks
+    def _do_email_identity(self, request, register_json, session):
+        if (self.hs.config.enable_registration_captcha and
+                not session[LoginType.RECAPTCHA]):
+            raise SynapseError(400, "Captcha is required.")
+
+        threepidCreds = register_json['threepidCreds']
+        handler = self.handlers.registration_handler
+        logger.debug("Registering email. threepidcreds: %s" % (threepidCreds))
+        yield handler.register_email(threepidCreds)
+        session["threepidCreds"] = threepidCreds  # store creds for next stage
+        session[LoginType.EMAIL_IDENTITY] = True  # mark email as done
+        self._save_session(session)
+        defer.returnValue({
+            "next": LoginType.PASSWORD
+        })
+
+    @defer.inlineCallbacks
+    def _do_password(self, request, register_json, session):
+        yield run_on_reactor()
+        if (self.hs.config.enable_registration_captcha and
+                not session[LoginType.RECAPTCHA]):
+            # captcha should've been done by this stage!
+            raise SynapseError(400, "Captcha is required.")
+
+        if ("user" in session and "user" in register_json and
+                session["user"] != register_json["user"]):
+            raise SynapseError(
+                400, "Cannot change user ID during registration"
+            )
+
+        password = register_json["password"].encode("utf-8")
+        desired_user_id = (register_json["user"].encode("utf-8")
+                           if "user" in register_json else None)
+        if (desired_user_id
+                and urllib.quote(desired_user_id) != desired_user_id):
+            raise SynapseError(
+                400,
+                "User ID must only contain characters which do not " +
+                "require URL encoding.")
+        handler = self.handlers.registration_handler
+        (user_id, token) = yield handler.register(
+            localpart=desired_user_id,
+            password=password
+        )
+
+        if session[LoginType.EMAIL_IDENTITY]:
+            logger.debug("Binding emails %s to %s" % (
+                session["threepidCreds"], user_id)
+            )
+            yield handler.bind_emails(user_id, session["threepidCreds"])
+
+        result = {
+            "user_id": user_id,
+            "access_token": token,
+            "home_server": self.hs.hostname,
+        }
+        self._remove_session(session)
+        defer.returnValue(result)
+
+
+def _parse_json(request):
+    try:
+        content = json.loads(request.content.read())
+        if type(content) != dict:
+            raise SynapseError(400, "Content must be a JSON object.")
+        return content
+    except ValueError:
+        raise SynapseError(400, "Content not JSON.")
+
+
+def register_servlets(hs, http_server):
+    RegisterRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
new file mode 100644
index 0000000000..48bba2a5f3
--- /dev/null
+++ b/synapse/rest/client/v1/room.py
@@ -0,0 +1,559 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+""" This module contains REST servlets to do with rooms: /rooms/<paths> """
+from twisted.internet import defer
+
+from base import RestServlet, client_path_pattern
+from synapse.api.errors import SynapseError, Codes
+from synapse.streams.config import PaginationConfig
+from synapse.api.constants import EventTypes, Membership
+
+import json
+import logging
+import urllib
+
+
+logger = logging.getLogger(__name__)
+
+
+class RoomCreateRestServlet(RestServlet):
+    # No PATTERN; we have custom dispatch rules here
+
+    def register(self, http_server):
+        PATTERN = "/createRoom"
+        register_txn_path(self, PATTERN, http_server)
+        # define CORS for all of /rooms in RoomCreateRestServlet for simplicity
+        http_server.register_path("OPTIONS",
+                                  client_path_pattern("/rooms(?:/.*)?$"),
+                                  self.on_OPTIONS)
+        # define CORS for /createRoom[/txnid]
+        http_server.register_path("OPTIONS",
+                                  client_path_pattern("/createRoom(?:/.*)?$"),
+                                  self.on_OPTIONS)
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, txn_id):
+        try:
+            defer.returnValue(
+                self.txns.get_client_transaction(request, txn_id)
+            )
+        except KeyError:
+            pass
+
+        response = yield self.on_POST(request)
+
+        self.txns.store_client_transaction(request, txn_id, response)
+        defer.returnValue(response)
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        auth_user = yield self.auth.get_user_by_req(request)
+
+        room_config = self.get_room_config(request)
+        info = yield self.make_room(room_config, auth_user, None)
+        room_config.update(info)
+        defer.returnValue((200, info))
+
+    @defer.inlineCallbacks
+    def make_room(self, room_config, auth_user, room_id):
+        handler = self.handlers.room_creation_handler
+        info = yield handler.create_room(
+            user_id=auth_user.to_string(),
+            room_id=room_id,
+            config=room_config
+        )
+        defer.returnValue(info)
+
+    def get_room_config(self, request):
+        try:
+            user_supplied_config = json.loads(request.content.read())
+            if "visibility" not in user_supplied_config:
+                # default visibility
+                user_supplied_config["visibility"] = "public"
+            return user_supplied_config
+        except (ValueError, TypeError):
+            raise SynapseError(400, "Body must be JSON.",
+                               errcode=Codes.BAD_JSON)
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+
+# TODO: Needs unit testing for generic events
+class RoomStateEventRestServlet(RestServlet):
+    def register(self, http_server):
+        # /room/$roomid/state/$eventtype
+        no_state_key = "/rooms/(?P<room_id>[^/]*)/state/(?P<event_type>[^/]*)$"
+
+        # /room/$roomid/state/$eventtype/$statekey
+        state_key = ("/rooms/(?P<room_id>[^/]*)/state/"
+                     "(?P<event_type>[^/]*)/(?P<state_key>[^/]*)$")
+
+        http_server.register_path("GET",
+                                  client_path_pattern(state_key),
+                                  self.on_GET)
+        http_server.register_path("PUT",
+                                  client_path_pattern(state_key),
+                                  self.on_PUT)
+        http_server.register_path("GET",
+                                  client_path_pattern(no_state_key),
+                                  self.on_GET_no_state_key)
+        http_server.register_path("PUT",
+                                  client_path_pattern(no_state_key),
+                                  self.on_PUT_no_state_key)
+
+    def on_GET_no_state_key(self, request, room_id, event_type):
+        return self.on_GET(request, room_id, event_type, "")
+
+    def on_PUT_no_state_key(self, request, room_id, event_type):
+        return self.on_PUT(request, room_id, event_type, "")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_id, event_type, state_key):
+        user = yield self.auth.get_user_by_req(request)
+
+        msg_handler = self.handlers.message_handler
+        data = yield msg_handler.get_room_data(
+            user_id=user.to_string(),
+            room_id=room_id,
+            event_type=event_type,
+            state_key=state_key,
+        )
+
+        if not data:
+            raise SynapseError(
+                404, "Event not found.", errcode=Codes.NOT_FOUND
+            )
+        defer.returnValue((200, data.get_dict()["content"]))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_id, event_type, state_key):
+        user = yield self.auth.get_user_by_req(request)
+
+        content = _parse_json(request)
+
+        event_dict = {
+            "type": event_type,
+            "content": content,
+            "room_id": room_id,
+            "sender": user.to_string(),
+        }
+
+        if state_key is not None:
+            event_dict["state_key"] = state_key
+
+        msg_handler = self.handlers.message_handler
+        yield msg_handler.create_and_send_event(event_dict)
+
+        defer.returnValue((200, {}))
+
+
+# TODO: Needs unit testing for generic events + feedback
+class RoomSendEventRestServlet(RestServlet):
+
+    def register(self, http_server):
+        # /rooms/$roomid/send/$event_type[/$txn_id]
+        PATTERN = ("/rooms/(?P<room_id>[^/]*)/send/(?P<event_type>[^/]*)")
+        register_txn_path(self, PATTERN, http_server, with_get=True)
+
+    @defer.inlineCallbacks
+    def on_POST(self, request, room_id, event_type):
+        user = yield self.auth.get_user_by_req(request)
+        content = _parse_json(request)
+
+        msg_handler = self.handlers.message_handler
+        event = yield msg_handler.create_and_send_event(
+            {
+                "type": event_type,
+                "content": content,
+                "room_id": room_id,
+                "sender": user.to_string(),
+            }
+        )
+
+        defer.returnValue((200, {"event_id": event.event_id}))
+
+    def on_GET(self, request, room_id, event_type, txn_id):
+        return (200, "Not implemented")
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_id, event_type, txn_id):
+        try:
+            defer.returnValue(
+                self.txns.get_client_transaction(request, txn_id)
+            )
+        except KeyError:
+            pass
+
+        response = yield self.on_POST(request, room_id, event_type)
+
+        self.txns.store_client_transaction(request, txn_id, response)
+        defer.returnValue(response)
+
+
+# TODO: Needs unit testing for room ID + alias joins
+class JoinRoomAliasServlet(RestServlet):
+
+    def register(self, http_server):
+        # /join/$room_identifier[/$txn_id]
+        PATTERN = ("/join/(?P<room_identifier>[^/]*)")
+        register_txn_path(self, PATTERN, http_server)
+
+    @defer.inlineCallbacks
+    def on_POST(self, request, room_identifier):
+        user = yield self.auth.get_user_by_req(request)
+
+        # the identifier could be a room alias or a room id. Try one then the
+        # other if it fails to parse, without swallowing other valid
+        # SynapseErrors.
+
+        identifier = None
+        is_room_alias = False
+        try:
+            identifier = self.hs.parse_roomalias(room_identifier)
+            is_room_alias = True
+        except SynapseError:
+            identifier = self.hs.parse_roomid(room_identifier)
+
+        # TODO: Support for specifying the home server to join with?
+
+        if is_room_alias:
+            handler = self.handlers.room_member_handler
+            ret_dict = yield handler.join_room_alias(user, identifier)
+            defer.returnValue((200, ret_dict))
+        else:  # room id
+            msg_handler = self.handlers.message_handler
+            yield msg_handler.create_and_send_event(
+                {
+                    "type": EventTypes.Member,
+                    "content": {"membership": Membership.JOIN},
+                    "room_id": identifier.to_string(),
+                    "sender": user.to_string(),
+                    "state_key": user.to_string(),
+                }
+            )
+
+            defer.returnValue((200, {"room_id": identifier.to_string()}))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_identifier, txn_id):
+        try:
+            defer.returnValue(
+                self.txns.get_client_transaction(request, txn_id)
+            )
+        except KeyError:
+            pass
+
+        response = yield self.on_POST(request, room_identifier)
+
+        self.txns.store_client_transaction(request, txn_id, response)
+        defer.returnValue(response)
+
+
+# TODO: Needs unit testing
+class PublicRoomListRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/publicRooms$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request):
+        handler = self.handlers.room_list_handler
+        data = yield handler.get_public_room_list()
+        defer.returnValue((200, data))
+
+
+# TODO: Needs unit testing
+class RoomMemberListRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/members$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_id):
+        # TODO support Pagination stream API (limit/tokens)
+        user = yield self.auth.get_user_by_req(request)
+        handler = self.handlers.room_member_handler
+        members = yield handler.get_room_members_as_pagination_chunk(
+            room_id=room_id,
+            user_id=user.to_string())
+
+        for event in members["chunk"]:
+            # FIXME: should probably be state_key here, not user_id
+            target_user = self.hs.parse_userid(event["user_id"])
+            # Presence is an optional cache; don't fail if we can't fetch it
+            try:
+                presence_handler = self.handlers.presence_handler
+                presence_state = yield presence_handler.get_state(
+                    target_user=target_user, auth_user=user
+                )
+                event["content"].update(presence_state)
+            except:
+                pass
+
+        defer.returnValue((200, members))
+
+
+# TODO: Needs unit testing
+class RoomMessageListRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/messages$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_id):
+        user = yield self.auth.get_user_by_req(request)
+        pagination_config = PaginationConfig.from_request(
+            request, default_limit=10,
+        )
+        with_feedback = "feedback" in request.args
+        as_client_event = "raw" not in request.args
+        handler = self.handlers.message_handler
+        msgs = yield handler.get_messages(
+            room_id=room_id,
+            user_id=user.to_string(),
+            pagin_config=pagination_config,
+            feedback=with_feedback,
+            as_client_event=as_client_event
+        )
+
+        defer.returnValue((200, msgs))
+
+
+# TODO: Needs unit testing
+class RoomStateRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/state$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_id):
+        user = yield self.auth.get_user_by_req(request)
+        handler = self.handlers.message_handler
+        # Get all the current state for this room
+        events = yield handler.get_state_events(
+            room_id=room_id,
+            user_id=user.to_string(),
+        )
+        defer.returnValue((200, events))
+
+
+# TODO: Needs unit testing
+class RoomInitialSyncRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/initialSync$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_id):
+        user = yield self.auth.get_user_by_req(request)
+        pagination_config = PaginationConfig.from_request(request)
+        content = yield self.handlers.message_handler.room_initial_sync(
+            room_id=room_id,
+            user_id=user.to_string(),
+            pagin_config=pagination_config,
+        )
+        defer.returnValue((200, content))
+
+
+class RoomTriggerBackfill(RestServlet):
+    PATTERN = client_path_pattern("/rooms/(?P<room_id>[^/]*)/backfill$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request, room_id):
+        remote_server = urllib.unquote(
+            request.args["remote"][0]
+        ).decode("UTF-8")
+
+        limit = int(request.args["limit"][0])
+
+        handler = self.handlers.federation_handler
+        events = yield handler.backfill(remote_server, room_id, limit)
+
+        res = [self.hs.serialize_event(event) for event in events]
+        defer.returnValue((200, res))
+
+
+# TODO: Needs unit testing
+class RoomMembershipRestServlet(RestServlet):
+
+    def register(self, http_server):
+        # /rooms/$roomid/[invite|join|leave]
+        PATTERN = ("/rooms/(?P<room_id>[^/]*)/"
+                   "(?P<membership_action>join|invite|leave|ban|kick)")
+        register_txn_path(self, PATTERN, http_server)
+
+    @defer.inlineCallbacks
+    def on_POST(self, request, room_id, membership_action):
+        user = yield self.auth.get_user_by_req(request)
+
+        content = _parse_json(request)
+
+        # target user is you unless it is an invite
+        state_key = user.to_string()
+        if membership_action in ["invite", "ban", "kick"]:
+            if "user_id" not in content:
+                raise SynapseError(400, "Missing user_id key.")
+            state_key = content["user_id"]
+
+            if membership_action == "kick":
+                membership_action = "leave"
+
+        msg_handler = self.handlers.message_handler
+        yield msg_handler.create_and_send_event(
+            {
+                "type": EventTypes.Member,
+                "content": {"membership": unicode(membership_action)},
+                "room_id": room_id,
+                "sender": user.to_string(),
+                "state_key": state_key,
+            }
+        )
+
+        defer.returnValue((200, {}))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_id, membership_action, txn_id):
+        try:
+            defer.returnValue(
+                self.txns.get_client_transaction(request, txn_id)
+            )
+        except KeyError:
+            pass
+
+        response = yield self.on_POST(request, room_id, membership_action)
+
+        self.txns.store_client_transaction(request, txn_id, response)
+        defer.returnValue(response)
+
+
+class RoomRedactEventRestServlet(RestServlet):
+    def register(self, http_server):
+        PATTERN = ("/rooms/(?P<room_id>[^/]*)/redact/(?P<event_id>[^/]*)")
+        register_txn_path(self, PATTERN, http_server)
+
+    @defer.inlineCallbacks
+    def on_POST(self, request, room_id, event_id):
+        user = yield self.auth.get_user_by_req(request)
+        content = _parse_json(request)
+
+        msg_handler = self.handlers.message_handler
+        event = yield msg_handler.create_and_send_event(
+            {
+                "type": EventTypes.Redaction,
+                "content": content,
+                "room_id": room_id,
+                "sender": user.to_string(),
+                "redacts": event_id,
+            }
+        )
+
+        defer.returnValue((200, {"event_id": event.event_id}))
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_id, event_id, txn_id):
+        try:
+            defer.returnValue(
+                self.txns.get_client_transaction(request, txn_id)
+            )
+        except KeyError:
+            pass
+
+        response = yield self.on_POST(request, room_id, event_id)
+
+        self.txns.store_client_transaction(request, txn_id, response)
+        defer.returnValue(response)
+
+
+class RoomTypingRestServlet(RestServlet):
+    PATTERN = client_path_pattern(
+        "/rooms/(?P<room_id>[^/]*)/typing/(?P<user_id>[^/]*)$"
+    )
+
+    @defer.inlineCallbacks
+    def on_PUT(self, request, room_id, user_id):
+        auth_user = yield self.auth.get_user_by_req(request)
+
+        room_id = urllib.unquote(room_id)
+        target_user = self.hs.parse_userid(urllib.unquote(user_id))
+
+        content = _parse_json(request)
+
+        typing_handler = self.handlers.typing_notification_handler
+
+        if content["typing"]:
+            yield typing_handler.started_typing(
+                target_user=target_user,
+                auth_user=auth_user,
+                room_id=room_id,
+                timeout=content.get("timeout", 30000),
+            )
+        else:
+            yield typing_handler.stopped_typing(
+                target_user=target_user,
+                auth_user=auth_user,
+                room_id=room_id,
+            )
+
+        defer.returnValue((200, {}))
+
+
+def _parse_json(request):
+    try:
+        content = json.loads(request.content.read())
+        if type(content) != dict:
+            raise SynapseError(400, "Content must be a JSON object.",
+                               errcode=Codes.NOT_JSON)
+        return content
+    except ValueError:
+        raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
+
+
+def register_txn_path(servlet, regex_string, http_server, with_get=False):
+    """Registers a transaction-based path.
+
+    This registers two paths:
+        PUT regex_string/$txnid
+        POST regex_string
+
+    Args:
+        regex_string (str): The regex string to register. Must NOT have a
+        trailing $ as this string will be appended to.
+        http_server : The http_server to register paths with.
+        with_get: True to also register respective GET paths for the PUTs.
+    """
+    http_server.register_path(
+        "POST",
+        client_path_pattern(regex_string + "$"),
+        servlet.on_POST
+    )
+    http_server.register_path(
+        "PUT",
+        client_path_pattern(regex_string + "/(?P<txn_id>[^/]*)$"),
+        servlet.on_PUT
+    )
+    if with_get:
+        http_server.register_path(
+            "GET",
+            client_path_pattern(regex_string + "/(?P<txn_id>[^/]*)$"),
+            servlet.on_GET
+        )
+
+
+def register_servlets(hs, http_server):
+    RoomStateEventRestServlet(hs).register(http_server)
+    RoomCreateRestServlet(hs).register(http_server)
+    RoomMemberListRestServlet(hs).register(http_server)
+    RoomMessageListRestServlet(hs).register(http_server)
+    JoinRoomAliasServlet(hs).register(http_server)
+    RoomTriggerBackfill(hs).register(http_server)
+    RoomMembershipRestServlet(hs).register(http_server)
+    RoomSendEventRestServlet(hs).register(http_server)
+    PublicRoomListRestServlet(hs).register(http_server)
+    RoomStateRestServlet(hs).register(http_server)
+    RoomInitialSyncRestServlet(hs).register(http_server)
+    RoomRedactEventRestServlet(hs).register(http_server)
+    RoomTypingRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v1/transactions.py b/synapse/rest/client/v1/transactions.py
new file mode 100644
index 0000000000..d933fea18a
--- /dev/null
+++ b/synapse/rest/client/v1/transactions.py
@@ -0,0 +1,95 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+"""This module contains logic for storing HTTP PUT transactions. This is used
+to ensure idempotency when performing PUTs using the REST API."""
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+# FIXME: elsewhere we use FooStore to indicate something in the storage layer...
+class HttpTransactionStore(object):
+
+    def __init__(self):
+        # { key : (txn_id, response) }
+        self.transactions = {}
+
+    def get_response(self, key, txn_id):
+        """Retrieve a response for this request.
+
+        Args:
+            key (str): A transaction-independent key for this request. Usually
+                this is a combination of the path (without the transaction id)
+                and the user's access token.
+            txn_id (str): The transaction ID for this request
+        Returns:
+            A tuple of (HTTP response code, response content) or None.
+        """
+        try:
+            logger.debug("get_response Key: %s TxnId: %s", key, txn_id)
+            (last_txn_id, response) = self.transactions[key]
+            if txn_id == last_txn_id:
+                logger.info("get_response: Returning a response for %s", key)
+                return response
+        except KeyError:
+            pass
+        return None
+
+    def store_response(self, key, txn_id, response):
+        """Stores an HTTP response tuple.
+
+        Args:
+            key (str): A transaction-independent key for this request. Usually
+                this is a combination of the path (without the transaction id)
+                and the user's access token.
+            txn_id (str): The transaction ID for this request.
+            response (tuple): A tuple of (HTTP response code, response content)
+        """
+        logger.debug("store_response Key: %s TxnId: %s", key, txn_id)
+        self.transactions[key] = (txn_id, response)
+
+    def store_client_transaction(self, request, txn_id, response):
+        """Stores the request/response pair of an HTTP transaction.
+
+        Args:
+            request (twisted.web.http.Request): The twisted HTTP request. This
+            request must have the transaction ID as the last path segment.
+            response (tuple): A tuple of (response code, response dict)
+            txn_id (str): The transaction ID for this request.
+        """
+        self.store_response(self._get_key(request), txn_id, response)
+
+    def get_client_transaction(self, request, txn_id):
+        """Retrieves a stored response if there was one.
+
+        Args:
+            request (twisted.web.http.Request): The twisted HTTP request. This
+            request must have the transaction ID as the last path segment.
+            txn_id (str): The transaction ID for this request.
+        Returns:
+            The response tuple.
+        Raises:
+            KeyError if the transaction was not found.
+        """
+        response = self.get_response(self._get_key(request), txn_id)
+        if response is None:
+            raise KeyError("Transaction not found.")
+        return response
+
+    def _get_key(self, request):
+        token = request.args["access_token"][0]
+        path_without_txn_id = request.path.rsplit("/", 1)[0]
+        return path_without_txn_id + "/" + token
diff --git a/synapse/rest/client/v1/voip.py b/synapse/rest/client/v1/voip.py
new file mode 100644
index 0000000000..011c35e69b
--- /dev/null
+++ b/synapse/rest/client/v1/voip.py
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 base import RestServlet, client_path_pattern
+
+
+import hmac
+import hashlib
+import base64
+
+
+class VoipRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/voip/turnServer$")
+
+    @defer.inlineCallbacks
+    def on_GET(self, request):
+        auth_user = yield self.auth.get_user_by_req(request)
+
+        turnUris = self.hs.config.turn_uris
+        turnSecret = self.hs.config.turn_shared_secret
+        userLifetime = self.hs.config.turn_user_lifetime
+        if not turnUris or not turnSecret or not userLifetime:
+            defer.returnValue((200, {}))
+
+        expiry = (self.hs.get_clock().time_msec() + userLifetime) / 1000
+        username = "%d:%s" % (expiry, auth_user.to_string())
+
+        mac = hmac.new(turnSecret, msg=username, digestmod=hashlib.sha1)
+        # We need to use standard base64 encoding here, *not* syutil's
+        # encode_base64 because we need to add the standard padding to get the
+        # same result as the TURN server.
+        password = base64.b64encode(mac.digest())
+
+        defer.returnValue((200, {
+            'username': username,
+            'password': password,
+            'ttl': userLifetime / 1000,
+            'uris': turnUris,
+        }))
+
+    def on_OPTIONS(self, request):
+        return (200, {})
+
+
+def register_servlets(hs, http_server):
+    VoipRestServlet(hs).register(http_server)
diff --git a/synapse/rest/media/__init__.py b/synapse/rest/media/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/synapse/rest/media/__init__.py
diff --git a/synapse/rest/media/v0/__init__.py b/synapse/rest/media/v0/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/synapse/rest/media/v0/__init__.py
diff --git a/synapse/rest/media/v0/content_repository.py b/synapse/rest/media/v0/content_repository.py
new file mode 100644
index 0000000000..79ae0e3d74
--- /dev/null
+++ b/synapse/rest/media/v0/content_repository.py
@@ -0,0 +1,212 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 synapse.http.server import respond_with_json_bytes
+
+from synapse.util.stringutils import random_string
+from synapse.api.errors import (
+    cs_exception, SynapseError, CodeMessageException, Codes, cs_error
+)
+
+from twisted.protocols.basic import FileSender
+from twisted.web import server, resource
+from twisted.internet import defer
+
+import base64
+import json
+import logging
+import os
+import re
+
+logger = logging.getLogger(__name__)
+
+
+class ContentRepoResource(resource.Resource):
+    """Provides file uploading and downloading.
+
+    Uploads are POSTed to wherever this Resource is linked to. This resource
+    returns a "content token" which can be used to GET this content again. The
+    token is typically a path, but it may not be. Tokens can expire, be
+    one-time uses, etc.
+
+    In this case, the token is a path to the file and contains 3 interesting
+    sections:
+        - User ID base64d (for namespacing content to each user)
+        - random 24 char string
+        - Content type base64d (so we can return it when clients GET it)
+
+    """
+    isLeaf = True
+
+    def __init__(self, hs, directory, auth, external_addr):
+        resource.Resource.__init__(self)
+        self.hs = hs
+        self.directory = directory
+        self.auth = auth
+        self.external_addr = external_addr.rstrip('/')
+        self.max_upload_size = hs.config.max_upload_size
+
+        if not os.path.isdir(self.directory):
+            os.mkdir(self.directory)
+            logger.info("ContentRepoResource : Created %s directory.",
+                        self.directory)
+
+    @defer.inlineCallbacks
+    def map_request_to_name(self, request):
+        # auth the user
+        auth_user = yield self.auth.get_user_by_req(request)
+
+        # namespace all file uploads on the user
+        prefix = base64.urlsafe_b64encode(
+            auth_user.to_string()
+        ).replace('=', '')
+
+        # use a random string for the main portion
+        main_part = random_string(24)
+
+        # suffix with a file extension if we can make one. This is nice to
+        # provide a hint to clients on the file information. We will also reuse
+        # this info to spit back the content type to the client.
+        suffix = ""
+        if request.requestHeaders.hasHeader("Content-Type"):
+            content_type = request.requestHeaders.getRawHeaders(
+                "Content-Type")[0]
+            suffix = "." + base64.urlsafe_b64encode(content_type)
+            if (content_type.split("/")[0].lower() in
+                    ["image", "video", "audio"]):
+                file_ext = content_type.split("/")[-1]
+                # be a little paranoid and only allow a-z
+                file_ext = re.sub("[^a-z]", "", file_ext)
+                suffix += "." + file_ext
+
+        file_name = prefix + main_part + suffix
+        file_path = os.path.join(self.directory, file_name)
+        logger.info("User %s is uploading a file to path %s",
+                    auth_user.to_string(),
+                    file_path)
+
+        # keep trying to make a non-clashing file, with a sensible max attempts
+        attempts = 0
+        while os.path.exists(file_path):
+            main_part = random_string(24)
+            file_name = prefix + main_part + suffix
+            file_path = os.path.join(self.directory, file_name)
+            attempts += 1
+            if attempts > 25:  # really? Really?
+                raise SynapseError(500, "Unable to create file.")
+
+        defer.returnValue(file_path)
+
+    def render_GET(self, request):
+        # no auth here on purpose, to allow anyone to view, even across home
+        # servers.
+
+        # TODO: A little crude here, we could do this better.
+        filename = request.path.split('/')[-1]
+        # be paranoid
+        filename = re.sub("[^0-9A-z.-_]", "", filename)
+
+        file_path = self.directory + "/" + filename
+
+        logger.debug("Searching for %s", file_path)
+
+        if os.path.isfile(file_path):
+            # filename has the content type
+            base64_contentype = filename.split(".")[1]
+            content_type = base64.urlsafe_b64decode(base64_contentype)
+            logger.info("Sending file %s", file_path)
+            f = open(file_path, 'rb')
+            request.setHeader('Content-Type', content_type)
+
+            # cache for at least a day.
+            # XXX: we might want to turn this off for data we don't want to
+            # recommend caching as it's sensitive or private - or at least
+            # select private. don't bother setting Expires as all our matrix
+            # clients are smart enough to be happy with Cache-Control (right?)
+            request.setHeader(
+                "Cache-Control", "public,max-age=86400,s-maxage=86400"
+            )
+
+            d = FileSender().beginFileTransfer(f, request)
+
+            # after the file has been sent, clean up and finish the request
+            def cbFinished(ignored):
+                f.close()
+                request.finish()
+            d.addCallback(cbFinished)
+        else:
+            respond_with_json_bytes(
+                request,
+                404,
+                json.dumps(cs_error("Not found", code=Codes.NOT_FOUND)),
+                send_cors=True)
+
+        return server.NOT_DONE_YET
+
+    def render_POST(self, request):
+        self._async_render(request)
+        return server.NOT_DONE_YET
+
+    def render_OPTIONS(self, request):
+        respond_with_json_bytes(request, 200, {}, send_cors=True)
+        return server.NOT_DONE_YET
+
+    @defer.inlineCallbacks
+    def _async_render(self, request):
+        try:
+            # TODO: The checks here are a bit late. The content will have
+            # already been uploaded to a tmp file at this point
+            content_length = request.getHeader("Content-Length")
+            if content_length is None:
+                raise SynapseError(
+                    msg="Request must specify a Content-Length", code=400
+                )
+            if int(content_length) > self.max_upload_size:
+                raise SynapseError(
+                    msg="Upload request body is too large",
+                    code=413,
+                )
+
+            fname = yield self.map_request_to_name(request)
+
+            # TODO I have a suspicious feeling this is just going to block
+            with open(fname, "wb") as f:
+                f.write(request.content.read())
+
+            # FIXME (erikj): These should use constants.
+            file_name = os.path.basename(fname)
+            # FIXME: we can't assume what the repo's public mounted path is
+            # ...plus self-signed SSL won't work to remote clients anyway
+            # ...and we can't assume that it's SSL anyway, as we might want to
+            # serve it via the non-SSL listener...
+            url = "%s/_matrix/content/%s" % (
+                self.external_addr, file_name
+            )
+
+            respond_with_json_bytes(request, 200,
+                                    json.dumps({"content_token": url}),
+                                    send_cors=True)
+
+        except CodeMessageException as e:
+            logger.exception(e)
+            respond_with_json_bytes(request, e.code,
+                                    json.dumps(cs_exception(e)))
+        except Exception as e:
+            logger.error("Failed to store file: %s" % e)
+            respond_with_json_bytes(
+                request,
+                500,
+                json.dumps({"error": "Internal server error"}),
+                send_cors=True)
diff --git a/synapse/rest/media/v1/__init__.py b/synapse/rest/media/v1/__init__.py
new file mode 100644
index 0000000000..d6c6690577
--- /dev/null
+++ b/synapse/rest/media/v1/__init__.py
@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+import PIL.Image
+
+# check for JPEG support.
+try:
+    PIL.Image._getdecoder("rgb", "jpeg", None)
+except IOError as e:
+    if str(e).startswith("decoder jpeg not available"):
+        raise Exception(
+            "FATAL: jpeg codec not supported. Install pillow correctly! "
+            " 'sudo apt-get install libjpeg-dev' then 'pip uninstall pillow &&"
+            " pip install pillow --user'"
+        )
+except Exception:
+    # any other exception is fine
+    pass
+
+
+# check for PNG support.
+try:
+    PIL.Image._getdecoder("rgb", "zip", None)
+except IOError as e:
+    if str(e).startswith("decoder zip not available"):
+        raise Exception(
+            "FATAL: zip codec not supported. Install pillow correctly! "
+            " 'sudo apt-get install libjpeg-dev' then 'pip uninstall pillow &&"
+            " pip install pillow --user'"
+        )
+except Exception:
+    # any other exception is fine
+    pass
diff --git a/synapse/rest/media/v1/base_resource.py b/synapse/rest/media/v1/base_resource.py
new file mode 100644
index 0000000000..688e7376ad
--- /dev/null
+++ b/synapse/rest/media/v1/base_resource.py
@@ -0,0 +1,378 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 .thumbnailer import Thumbnailer
+
+from synapse.http.server import respond_with_json
+from synapse.util.stringutils import random_string
+from synapse.api.errors import (
+    cs_exception, CodeMessageException, cs_error, Codes, SynapseError
+)
+
+from twisted.internet import defer
+from twisted.web.resource import Resource
+from twisted.protocols.basic import FileSender
+
+import os
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class BaseMediaResource(Resource):
+    isLeaf = True
+
+    def __init__(self, hs, filepaths):
+        Resource.__init__(self)
+        self.auth = hs.get_auth()
+        self.client = hs.get_http_client()
+        self.clock = hs.get_clock()
+        self.server_name = hs.hostname
+        self.store = hs.get_datastore()
+        self.max_upload_size = hs.config.max_upload_size
+        self.max_image_pixels = hs.config.max_image_pixels
+        self.filepaths = filepaths
+        self.downloads = {}
+
+    @staticmethod
+    def catch_errors(request_handler):
+        @defer.inlineCallbacks
+        def wrapped_request_handler(self, request):
+            try:
+                yield request_handler(self, request)
+            except CodeMessageException as e:
+                logger.exception(e)
+                respond_with_json(
+                    request, e.code, cs_exception(e), send_cors=True
+                )
+            except:
+                logger.exception(
+                    "Failed handle request %s.%s on %r",
+                    request_handler.__module__,
+                    request_handler.__name__,
+                    self,
+                )
+                respond_with_json(
+                    request,
+                    500,
+                    {"error": "Internal server error"},
+                    send_cors=True
+                )
+        return wrapped_request_handler
+
+    @staticmethod
+    def _parse_media_id(request):
+        try:
+            server_name, media_id = request.postpath
+            return (server_name, media_id)
+        except:
+            raise SynapseError(
+                404,
+                "Invalid media id token %r" % (request.postpath,),
+                Codes.UNKKOWN,
+            )
+
+    @staticmethod
+    def _parse_integer(request, arg_name, default=None):
+        try:
+            if default is None:
+                return int(request.args[arg_name][0])
+            else:
+                return int(request.args.get(arg_name, [default])[0])
+        except:
+            raise SynapseError(
+                400,
+                "Missing integer argument %r" % (arg_name,),
+                Codes.UNKNOWN,
+            )
+
+    @staticmethod
+    def _parse_string(request, arg_name, default=None):
+        try:
+            if default is None:
+                return request.args[arg_name][0]
+            else:
+                return request.args.get(arg_name, [default])[0]
+        except:
+            raise SynapseError(
+                400,
+                "Missing string argument %r" % (arg_name,),
+                Codes.UNKNOWN,
+            )
+
+    def _respond_404(self, request):
+        respond_with_json(
+            request, 404,
+            cs_error(
+                "Not found %r" % (request.postpath,),
+                code=Codes.NOT_FOUND,
+            ),
+            send_cors=True
+        )
+
+    @staticmethod
+    def _makedirs(filepath):
+        dirname = os.path.dirname(filepath)
+        if not os.path.exists(dirname):
+            os.makedirs(dirname)
+
+    def _get_remote_media(self, server_name, media_id):
+        key = (server_name, media_id)
+        download = self.downloads.get(key)
+        if download is None:
+            download = self._get_remote_media_impl(server_name, media_id)
+            self.downloads[key] = download
+
+            @download.addBoth
+            def callback(media_info):
+                del self.downloads[key]
+                return media_info
+        return download
+
+    @defer.inlineCallbacks
+    def _get_remote_media_impl(self, server_name, media_id):
+        media_info = yield self.store.get_cached_remote_media(
+            server_name, media_id
+        )
+        if not media_info:
+            media_info = yield self._download_remote_file(
+                server_name, media_id
+            )
+        defer.returnValue(media_info)
+
+    @defer.inlineCallbacks
+    def _download_remote_file(self, server_name, media_id):
+        file_id = random_string(24)
+
+        fname = self.filepaths.remote_media_filepath(
+            server_name, file_id
+        )
+        self._makedirs(fname)
+
+        try:
+            with open(fname, "wb") as f:
+                request_path = "/".join((
+                    "/_matrix/media/v1/download", server_name, media_id,
+                ))
+                length, headers = yield self.client.get_file(
+                    server_name, request_path, output_stream=f,
+                    max_size=self.max_upload_size,
+                )
+            media_type = headers["Content-Type"][0]
+            time_now_ms = self.clock.time_msec()
+
+            yield self.store.store_cached_remote_media(
+                origin=server_name,
+                media_id=media_id,
+                media_type=media_type,
+                time_now_ms=self.clock.time_msec(),
+                upload_name=None,
+                media_length=length,
+                filesystem_id=file_id,
+            )
+        except:
+            os.remove(fname)
+            raise
+
+        media_info = {
+            "media_type": media_type,
+            "media_length": length,
+            "upload_name": None,
+            "created_ts": time_now_ms,
+            "filesystem_id": file_id,
+        }
+
+        yield self._generate_remote_thumbnails(
+            server_name, media_id, media_info
+        )
+
+        defer.returnValue(media_info)
+
+    @defer.inlineCallbacks
+    def _respond_with_file(self, request, media_type, file_path,
+                           file_size=None):
+        logger.debug("Responding with %r", file_path)
+
+        if os.path.isfile(file_path):
+            request.setHeader(b"Content-Type", media_type.encode("UTF-8"))
+
+            # cache for at least a day.
+            # XXX: we might want to turn this off for data we don't want to
+            # recommend caching as it's sensitive or private - or at least
+            # select private. don't bother setting Expires as all our
+            # clients are smart enough to be happy with Cache-Control
+            request.setHeader(
+                b"Cache-Control", b"public,max-age=86400,s-maxage=86400"
+            )
+            if file_size is None:
+                stat = os.stat(file_path)
+                file_size = stat.st_size
+
+            request.setHeader(
+                b"Content-Length", b"%d" % (file_size,)
+            )
+
+            with open(file_path, "rb") as f:
+                yield FileSender().beginFileTransfer(f, request)
+
+            request.finish()
+        else:
+            self._respond_404(request)
+
+    def _get_thumbnail_requirements(self, media_type):
+        if media_type == "image/jpeg":
+            return (
+                (32, 32, "crop", "image/jpeg"),
+                (96, 96, "crop", "image/jpeg"),
+                (320, 240, "scale", "image/jpeg"),
+                (640, 480, "scale", "image/jpeg"),
+            )
+        elif (media_type == "image/png") or (media_type == "image/gif"):
+            return (
+                (32, 32, "crop", "image/png"),
+                (96, 96, "crop", "image/png"),
+                (320, 240, "scale", "image/png"),
+                (640, 480, "scale", "image/png"),
+            )
+        else:
+            return ()
+
+    @defer.inlineCallbacks
+    def _generate_local_thumbnails(self, media_id, media_info):
+        media_type = media_info["media_type"]
+        requirements = self._get_thumbnail_requirements(media_type)
+        if not requirements:
+            return
+
+        input_path = self.filepaths.local_media_filepath(media_id)
+        thumbnailer = Thumbnailer(input_path)
+        m_width = thumbnailer.width
+        m_height = thumbnailer.height
+
+        if m_width * m_height >= self.max_image_pixels:
+            logger.info(
+                "Image too large to thumbnail %r x %r > %r",
+                m_width, m_height, self.max_image_pixels
+            )
+            return
+
+        scales = set()
+        crops = set()
+        for r_width, r_height, r_method, r_type in requirements:
+            if r_method == "scale":
+                t_width, t_height = thumbnailer.aspect(r_width, r_height)
+                scales.add((
+                    min(m_width, t_width), min(m_height, t_height), r_type,
+                ))
+            elif r_method == "crop":
+                crops.add((r_width, r_height, r_type))
+
+        for t_width, t_height, t_type in scales:
+            t_method = "scale"
+            t_path = self.filepaths.local_media_thumbnail(
+                media_id, t_width, t_height, t_type, t_method
+            )
+            self._makedirs(t_path)
+            t_len = thumbnailer.scale(t_path, t_width, t_height, t_type)
+            yield self.store.store_local_thumbnail(
+                media_id, t_width, t_height, t_type, t_method, t_len
+            )
+
+        for t_width, t_height, t_type in crops:
+            if (t_width, t_height, t_type) in scales:
+                # If the aspect ratio of the cropped thumbnail matches a purely
+                # scaled one then there is no point in calculating a separate
+                # thumbnail.
+                continue
+            t_method = "crop"
+            t_path = self.filepaths.local_media_thumbnail(
+                media_id, t_width, t_height, t_type, t_method
+            )
+            self._makedirs(t_path)
+            t_len = thumbnailer.crop(t_path, t_width, t_height, t_type)
+            yield self.store.store_local_thumbnail(
+                media_id, t_width, t_height, t_type, t_method, t_len
+            )
+
+        defer.returnValue({
+            "width": m_width,
+            "height": m_height,
+        })
+
+    @defer.inlineCallbacks
+    def _generate_remote_thumbnails(self, server_name, media_id, media_info):
+        media_type = media_info["media_type"]
+        file_id = media_info["filesystem_id"]
+        requirements = self._get_thumbnail_requirements(media_type)
+        if not requirements:
+            return
+
+        input_path = self.filepaths.remote_media_filepath(server_name, file_id)
+        thumbnailer = Thumbnailer(input_path)
+        m_width = thumbnailer.width
+        m_height = thumbnailer.height
+
+        if m_width * m_height >= self.max_image_pixels:
+            logger.info(
+                "Image too large to thumbnail %r x %r > %r",
+                m_width, m_height, self.max_image_pixels
+            )
+            return
+
+        scales = set()
+        crops = set()
+        for r_width, r_height, r_method, r_type in requirements:
+            if r_method == "scale":
+                t_width, t_height = thumbnailer.aspect(r_width, r_height)
+                scales.add((
+                    min(m_width, t_width), min(m_height, t_height), r_type,
+                ))
+            elif r_method == "crop":
+                crops.add((r_width, r_height, r_type))
+
+        for t_width, t_height, t_type in scales:
+            t_method = "scale"
+            t_path = self.filepaths.remote_media_thumbnail(
+                server_name, file_id, t_width, t_height, t_type, t_method
+            )
+            self._makedirs(t_path)
+            t_len = thumbnailer.scale(t_path, t_width, t_height, t_type)
+            yield self.store.store_remote_media_thumbnail(
+                server_name, media_id, file_id,
+                t_width, t_height, t_type, t_method, t_len
+            )
+
+        for t_width, t_height, t_type in crops:
+            if (t_width, t_height, t_type) in scales:
+                # If the aspect ratio of the cropped thumbnail matches a purely
+                # scaled one then there is no point in calculating a separate
+                # thumbnail.
+                continue
+            t_method = "crop"
+            t_path = self.filepaths.remote_media_thumbnail(
+                server_name, file_id, t_width, t_height, t_type, t_method
+            )
+            self._makedirs(t_path)
+            t_len = thumbnailer.crop(t_path, t_width, t_height, t_type)
+            yield self.store.store_remote_media_thumbnail(
+                server_name, media_id, file_id,
+                t_width, t_height, t_type, t_method, t_len
+            )
+
+        defer.returnValue({
+            "width": m_width,
+            "height": m_height,
+        })
diff --git a/synapse/rest/media/v1/download_resource.py b/synapse/rest/media/v1/download_resource.py
new file mode 100644
index 0000000000..c585bb11f7
--- /dev/null
+++ b/synapse/rest/media/v1/download_resource.py
@@ -0,0 +1,74 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 .base_resource import BaseMediaResource
+
+from twisted.web.server import NOT_DONE_YET
+from twisted.internet import defer
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class DownloadResource(BaseMediaResource):
+    def render_GET(self, request):
+        self._async_render_GET(request)
+        return NOT_DONE_YET
+
+    @BaseMediaResource.catch_errors
+    @defer.inlineCallbacks
+    def _async_render_GET(self, request):
+        try:
+            server_name, media_id = request.postpath
+        except:
+            self._respond_404(request)
+            return
+
+        if server_name == self.server_name:
+            yield self._respond_local_file(request, media_id)
+        else:
+            yield self._respond_remote_file(request, server_name, media_id)
+
+    @defer.inlineCallbacks
+    def _respond_local_file(self, request, media_id):
+        media_info = yield self.store.get_local_media(media_id)
+        if not media_info:
+            self._respond_404(request)
+            return
+
+        media_type = media_info["media_type"]
+        media_length = media_info["media_length"]
+        file_path = self.filepaths.local_media_filepath(media_id)
+
+        yield self._respond_with_file(
+            request, media_type, file_path, media_length
+        )
+
+    @defer.inlineCallbacks
+    def _respond_remote_file(self, request, server_name, media_id):
+        media_info = yield self._get_remote_media(server_name, media_id)
+
+        media_type = media_info["media_type"]
+        media_length = media_info["media_length"]
+        filesystem_id = media_info["filesystem_id"]
+
+        file_path = self.filepaths.remote_media_filepath(
+            server_name, filesystem_id
+        )
+
+        yield self._respond_with_file(
+            request, media_type, file_path, media_length
+        )
diff --git a/synapse/rest/media/v1/filepath.py b/synapse/rest/media/v1/filepath.py
new file mode 100644
index 0000000000..ed9a58e9d9
--- /dev/null
+++ b/synapse/rest/media/v1/filepath.py
@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+import os
+
+
+class MediaFilePaths(object):
+
+    def __init__(self, base_path):
+        self.base_path = base_path
+
+    def default_thumbnail(self, default_top_level, default_sub_type, width,
+                          height, content_type, method):
+        top_level_type, sub_type = content_type.split("/")
+        file_name = "%i-%i-%s-%s-%s" % (
+            width, height, top_level_type, sub_type, method
+        )
+        return os.path.join(
+            self.base_path, "default_thumbnails", default_top_level,
+            default_sub_type, file_name
+        )
+
+    def local_media_filepath(self, media_id):
+        return os.path.join(
+            self.base_path, "local_content",
+            media_id[0:2], media_id[2:4], media_id[4:]
+        )
+
+    def local_media_thumbnail(self, media_id, width, height, content_type,
+                              method):
+        top_level_type, sub_type = content_type.split("/")
+        file_name = "%i-%i-%s-%s-%s" % (
+            width, height, top_level_type, sub_type, method
+        )
+        return os.path.join(
+            self.base_path, "local_thumbnails",
+            media_id[0:2], media_id[2:4], media_id[4:],
+            file_name
+        )
+
+    def remote_media_filepath(self, server_name, file_id):
+        return os.path.join(
+            self.base_path, "remote_content", server_name,
+            file_id[0:2], file_id[2:4], file_id[4:]
+        )
+
+    def remote_media_thumbnail(self, server_name, file_id, width, height,
+                               content_type, method):
+        top_level_type, sub_type = content_type.split("/")
+        file_name = "%i-%i-%s-%s" % (width, height, top_level_type, sub_type)
+        return os.path.join(
+            self.base_path, "remote_thumbnail", server_name,
+            file_id[0:2], file_id[2:4], file_id[4:],
+            file_name
+        )
diff --git a/synapse/rest/media/v1/media_repository.py b/synapse/rest/media/v1/media_repository.py
new file mode 100644
index 0000000000..461cc001f1
--- /dev/null
+++ b/synapse/rest/media/v1/media_repository.py
@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 .upload_resource import UploadResource
+from .download_resource import DownloadResource
+from .thumbnail_resource import ThumbnailResource
+from .filepath import MediaFilePaths
+
+from twisted.web.resource import Resource
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class MediaRepositoryResource(Resource):
+    """File uploading and downloading.
+
+    Uploads are POSTed to a resource which returns a token which is used to GET
+    the download::
+
+        => POST /_matrix/media/v1/upload HTTP/1.1
+           Content-Type: <media-type>
+
+           <media>
+
+        <= HTTP/1.1 200 OK
+           Content-Type: application/json
+
+           { "content_uri": "mxc://<server-name>/<media-id>" }
+
+        => GET /_matrix/media/v1/download/<server-name>/<media-id> HTTP/1.1
+
+        <= HTTP/1.1 200 OK
+           Content-Type: <media-type>
+           Content-Disposition: attachment;filename=<upload-filename>
+
+           <media>
+
+    Clients can get thumbnails by supplying a desired width and height and
+    thumbnailing method::
+
+        => GET /_matrix/media/v1/thumbnail/<server_name>
+                /<media-id>?width=<w>&height=<h>&method=<m> HTTP/1.1
+
+        <= HTTP/1.1 200 OK
+           Content-Type: image/jpeg or image/png
+
+           <thumbnail>
+
+    The thumbnail methods are "crop" and "scale". "scale" trys to return an
+    image where either the width or the height is smaller than the requested
+    size. The client should then scale and letterbox the image if it needs to
+    fit within a given rectangle. "crop" trys to return an image where the
+    width and height are close to the requested size and the aspect matches
+    the requested size. The client should scale the image if it needs to fit
+    within a given rectangle.
+    """
+
+    def __init__(self, hs):
+        Resource.__init__(self)
+        filepaths = MediaFilePaths(hs.config.media_store_path)
+        self.putChild("upload", UploadResource(hs, filepaths))
+        self.putChild("download", DownloadResource(hs, filepaths))
+        self.putChild("thumbnail", ThumbnailResource(hs, filepaths))
diff --git a/synapse/rest/media/v1/thumbnail_resource.py b/synapse/rest/media/v1/thumbnail_resource.py
new file mode 100644
index 0000000000..84f5e3463c
--- /dev/null
+++ b/synapse/rest/media/v1/thumbnail_resource.py
@@ -0,0 +1,193 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 .base_resource import BaseMediaResource
+
+from twisted.web.server import NOT_DONE_YET
+from twisted.internet import defer
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class ThumbnailResource(BaseMediaResource):
+    isLeaf = True
+
+    def render_GET(self, request):
+        self._async_render_GET(request)
+        return NOT_DONE_YET
+
+    @BaseMediaResource.catch_errors
+    @defer.inlineCallbacks
+    def _async_render_GET(self, request):
+        server_name, media_id = self._parse_media_id(request)
+        width = self._parse_integer(request, "width")
+        height = self._parse_integer(request, "height")
+        method = self._parse_string(request, "method", "scale")
+        m_type = self._parse_string(request, "type", "image/png")
+
+        if server_name == self.server_name:
+            yield self._respond_local_thumbnail(
+                request, media_id, width, height, method, m_type
+            )
+        else:
+            yield self._respond_remote_thumbnail(
+                request, server_name, media_id,
+                width, height, method, m_type
+            )
+
+    @defer.inlineCallbacks
+    def _respond_local_thumbnail(self, request, media_id, width, height,
+                                 method, m_type):
+        media_info = yield self.store.get_local_media(media_id)
+
+        if not media_info:
+            self._respond_404(request)
+            return
+
+        thumbnail_infos = yield self.store.get_local_media_thumbnails(media_id)
+
+        if thumbnail_infos:
+            thumbnail_info = self._select_thumbnail(
+                width, height, method, m_type, thumbnail_infos
+            )
+            t_width = thumbnail_info["thumbnail_width"]
+            t_height = thumbnail_info["thumbnail_height"]
+            t_type = thumbnail_info["thumbnail_type"]
+            t_method = thumbnail_info["thumbnail_method"]
+
+            file_path = self.filepaths.local_media_thumbnail(
+                media_id, t_width, t_height, t_type, t_method,
+            )
+            yield self._respond_with_file(request, t_type, file_path)
+
+        else:
+            yield self._respond_default_thumbnail(
+                request, media_info, width, height, method, m_type,
+            )
+
+    @defer.inlineCallbacks
+    def _respond_remote_thumbnail(self, request, server_name, media_id, width,
+                                  height, method, m_type):
+        # TODO: Don't download the whole remote file
+        # We should proxy the thumbnail from the remote server instead.
+        media_info = yield self._get_remote_media(server_name, media_id)
+
+        thumbnail_infos = yield self.store.get_remote_media_thumbnails(
+            server_name, media_id,
+        )
+
+        if thumbnail_infos:
+            thumbnail_info = self._select_thumbnail(
+                width, height, method, m_type, thumbnail_infos
+            )
+            t_width = thumbnail_info["thumbnail_width"]
+            t_height = thumbnail_info["thumbnail_height"]
+            t_type = thumbnail_info["thumbnail_type"]
+            t_method = thumbnail_info["thumbnail_method"]
+            file_id = thumbnail_info["filesystem_id"]
+            t_length = thumbnail_info["thumbnail_length"]
+
+            file_path = self.filepaths.remote_media_thumbnail(
+                server_name, file_id, t_width, t_height, t_type, t_method,
+            )
+            yield self._respond_with_file(request, t_type, file_path, t_length)
+        else:
+            yield self._respond_default_thumbnail(
+                request, media_info, width, height, method, m_type,
+            )
+
+    @defer.inlineCallbacks
+    def _respond_default_thumbnail(self, request, media_info, width, height,
+                                   method, m_type):
+        media_type = media_info["media_type"]
+        top_level_type = media_type.split("/")[0]
+        sub_type = media_type.split("/")[-1].split(";")[0]
+        thumbnail_infos = yield self.store.get_default_thumbnails(
+            top_level_type, sub_type,
+        )
+        if not thumbnail_infos:
+            thumbnail_infos = yield self.store.get_default_thumbnails(
+                top_level_type, "_default",
+            )
+        if not thumbnail_infos:
+            thumbnail_infos = yield self.store.get_default_thumbnails(
+                "_default", "_default",
+            )
+        if not thumbnail_infos:
+            self._respond_404(request)
+            return
+
+        thumbnail_info = self._select_thumbnail(
+            width, height, "crop", m_type, thumbnail_infos
+        )
+
+        t_width = thumbnail_info["thumbnail_width"]
+        t_height = thumbnail_info["thumbnail_height"]
+        t_type = thumbnail_info["thumbnail_type"]
+        t_method = thumbnail_info["thumbnail_method"]
+        t_length = thumbnail_info["thumbnail_length"]
+
+        file_path = self.filepaths.default_thumbnail(
+            top_level_type, sub_type, t_width, t_height, t_type, t_method,
+        )
+        yield self.respond_with_file(request, t_type, file_path, t_length)
+
+    def _select_thumbnail(self, desired_width, desired_height, desired_method,
+                          desired_type, thumbnail_infos):
+        d_w = desired_width
+        d_h = desired_height
+
+        if desired_method.lower() == "crop":
+            info_list = []
+            for info in thumbnail_infos:
+                t_w = info["thumbnail_width"]
+                t_h = info["thumbnail_height"]
+                t_method = info["thumbnail_method"]
+                if t_method == "scale" or t_method == "crop":
+                    aspect_quality = abs(d_w * t_h - d_h * t_w)
+                    size_quality = abs((d_w - t_w) * (d_h - t_h))
+                    type_quality = desired_type != info["thumbnail_type"]
+                    length_quality = info["thumbnail_length"]
+                    info_list.append((
+                        aspect_quality, size_quality, type_quality,
+                        length_quality, info
+                    ))
+            if info_list:
+                return min(info_list)[-1]
+        else:
+            info_list = []
+            info_list2 = []
+            for info in thumbnail_infos:
+                t_w = info["thumbnail_width"]
+                t_h = info["thumbnail_height"]
+                t_method = info["thumbnail_method"]
+                size_quality = abs((d_w - t_w) * (d_h - t_h))
+                type_quality = desired_type != info["thumbnail_type"]
+                length_quality = info["thumbnail_length"]
+                if t_method == "scale" and (t_w >= d_w or t_h >= d_h):
+                    info_list.append((
+                        size_quality, type_quality, length_quality, info
+                    ))
+                elif t_method == "scale":
+                    info_list2.append((
+                        size_quality, type_quality, length_quality, info
+                    ))
+            if info_list:
+                return min(info_list)[-1]
+            else:
+                return min(info_list2)[-1]
diff --git a/synapse/rest/media/v1/thumbnailer.py b/synapse/rest/media/v1/thumbnailer.py
new file mode 100644
index 0000000000..28404f2b7b
--- /dev/null
+++ b/synapse/rest/media/v1/thumbnailer.py
@@ -0,0 +1,89 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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.
+
+import PIL.Image as Image
+from io import BytesIO
+
+
+class Thumbnailer(object):
+
+    FORMATS = {
+        "image/jpeg": "JPEG",
+        "image/png": "PNG",
+    }
+
+    def __init__(self, input_path):
+        self.image = Image.open(input_path)
+        self.width, self.height = self.image.size
+
+    def aspect(self, max_width, max_height):
+        """Calculate the largest size that preserves aspect ratio which
+        fits within the given rectangle::
+
+            (w_in / h_in) = (w_out / h_out)
+            w_out = min(w_max, h_max * (w_in / h_in))
+            h_out = min(h_max, w_max * (h_in / w_in))
+
+        Args:
+            max_width: The largest possible width.
+            max_height: The larget possible height.
+        """
+
+        if max_width * self.height < max_height * self.width:
+            return (max_width, (max_width * self.height) // self.width)
+        else:
+            return ((max_height * self.width) // self.height, max_height)
+
+    def scale(self, output_path, width, height, output_type):
+        """Rescales the image to the given dimensions"""
+        scaled = self.image.resize((width, height), Image.ANTIALIAS)
+        return self.save_image(scaled, output_type, output_path)
+
+    def crop(self, output_path, width, height, output_type):
+        """Rescales and crops the image to the given dimensions preserving
+        aspect::
+            (w_in / h_in) = (w_scaled / h_scaled)
+            w_scaled = max(w_out, h_out * (w_in / h_in))
+            h_scaled = max(h_out, w_out * (h_in / w_in))
+
+        Args:
+            max_width: The largest possible width.
+            max_height: The larget possible height.
+        """
+        if width * self.height > height * self.width:
+            scaled_height = (width * self.height) // self.width
+            scaled_image = self.image.resize(
+                (width, scaled_height), Image.ANTIALIAS
+            )
+            crop_top = (scaled_height - height) // 2
+            crop_bottom = height + crop_top
+            cropped = scaled_image.crop((0, crop_top, width, crop_bottom))
+        else:
+            scaled_width = (height * self.width) // self.height
+            scaled_image = self.image.resize(
+                (scaled_width, height), Image.ANTIALIAS
+            )
+            crop_left = (scaled_width - width) // 2
+            crop_right = width + crop_left
+            cropped = scaled_image.crop((crop_left, 0, crop_right, height))
+        return self.save_image(cropped, output_type, output_path)
+
+    def save_image(self, output_image, output_type, output_path):
+        output_bytes_io = BytesIO()
+        output_image.save(output_bytes_io, self.FORMATS[output_type], quality=70)
+        output_bytes = output_bytes_io.getvalue()
+        with open(output_path, "wb") as output_file:
+            output_file.write(output_bytes)
+        return len(output_bytes)
diff --git a/synapse/rest/media/v1/upload_resource.py b/synapse/rest/media/v1/upload_resource.py
new file mode 100644
index 0000000000..b1718a630b
--- /dev/null
+++ b/synapse/rest/media/v1/upload_resource.py
@@ -0,0 +1,113 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014, 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 synapse.http.server import respond_with_json
+
+from synapse.util.stringutils import random_string
+from synapse.api.errors import (
+    cs_exception, SynapseError, CodeMessageException
+)
+
+from twisted.web.server import NOT_DONE_YET
+from twisted.internet import defer
+
+from .base_resource import BaseMediaResource
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class UploadResource(BaseMediaResource):
+    def render_POST(self, request):
+        self._async_render_POST(request)
+        return NOT_DONE_YET
+
+    def render_OPTIONS(self, request):
+        respond_with_json(request, 200, {}, send_cors=True)
+        return NOT_DONE_YET
+
+    @defer.inlineCallbacks
+    def _async_render_POST(self, request):
+        try:
+            auth_user = yield self.auth.get_user_by_req(request)
+            # TODO: The checks here are a bit late. The content will have
+            # already been uploaded to a tmp file at this point
+            content_length = request.getHeader("Content-Length")
+            if content_length is None:
+                raise SynapseError(
+                    msg="Request must specify a Content-Length", code=400
+                )
+            if int(content_length) > self.max_upload_size:
+                raise SynapseError(
+                    msg="Upload request body is too large",
+                    code=413,
+                )
+
+            headers = request.requestHeaders
+
+            if headers.hasHeader("Content-Type"):
+                media_type = headers.getRawHeaders("Content-Type")[0]
+            else:
+                raise SynapseError(
+                    msg="Upload request missing 'Content-Type'",
+                    code=400,
+                )
+
+            #if headers.hasHeader("Content-Disposition"):
+            #    disposition = headers.getRawHeaders("Content-Disposition")[0]
+            # TODO(markjh): parse content-dispostion
+
+            media_id = random_string(24)
+
+            fname = self.filepaths.local_media_filepath(media_id)
+            self._makedirs(fname)
+
+            # This shouldn't block for very long because the content will have
+            # already been uploaded at this point.
+            with open(fname, "wb") as f:
+                f.write(request.content.read())
+
+            yield self.store.store_local_media(
+                media_id=media_id,
+                media_type=media_type,
+                time_now_ms=self.clock.time_msec(),
+                upload_name=None,
+                media_length=content_length,
+                user_id=auth_user,
+            )
+            media_info = {
+                "media_type": media_type,
+                "media_length": content_length,
+            }
+
+            yield self._generate_local_thumbnails(media_id, media_info)
+
+            content_uri = "mxc://%s/%s" % (self.server_name, media_id)
+
+            respond_with_json(
+                request, 200, {"content_uri": content_uri}, send_cors=True
+            )
+        except CodeMessageException as e:
+            logger.exception(e)
+            respond_with_json(request, e.code, cs_exception(e), send_cors=True)
+        except:
+            logger.exception("Failed to store file")
+            respond_with_json(
+                request,
+                500,
+                {"error": "Internal server error"},
+                send_cors=True
+            )