diff options
Diffstat (limited to 'synapse/replication/http')
| -rw-r--r-- | synapse/replication/http/_base.py | 207 | ||||
| -rw-r--r-- | synapse/replication/http/membership.py | 262 | ||||
| -rw-r--r-- | synapse/replication/http/send_event.py | 111 |
3 files changed, 334 insertions, 246 deletions
diff --git a/synapse/replication/http/_base.py b/synapse/replication/http/_base.py new file mode 100644 index 0000000000..a7d1b2dabe --- /dev/null +++ b/synapse/replication/http/_base.py @@ -0,0 +1,207 @@ +# -*- coding: utf-8 -*- +# Copyright 2018 New Vector 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 abc +import logging +import re + +from six.moves import urllib + +from twisted.internet import defer + +from synapse.api.errors import ( + CodeMessageException, + HttpResponseException, +) +from synapse.util.caches.response_cache import ResponseCache +from synapse.util.stringutils import random_string + +logger = logging.getLogger(__name__) + + +class ReplicationEndpoint(object): + """Helper base class for defining new replication HTTP endpoints. + + This creates an endpoint under `/_synapse/replication/:NAME/:PATH_ARGS..` + (with an `/:txn_id` prefix for cached requests.), where NAME is a name, + PATH_ARGS are a tuple of parameters to be encoded in the URL. + + For example, if `NAME` is "send_event" and `PATH_ARGS` is `("event_id",)`, + with `CACHE` set to true then this generates an endpoint: + + /_synapse/replication/send_event/:event_id/:txn_id + + For POST requests the payload is serialized to json and sent as the body, + while for GET requests the payload is added as query parameters. See + `_serialize_payload` for details. + + Incoming requests are handled by overriding `_handle_request`. Servers + must call `register` to register the path with the HTTP server. + + Requests can be sent by calling the client returned by `make_client`. + + Attributes: + NAME (str): A name for the endpoint, added to the path as well as used + in logging and metrics. + PATH_ARGS (tuple[str]): A list of parameters to be added to the path. + Adding parameters to the path (rather than payload) can make it + easier to follow along in the log files. + POST (bool): True to use POST request with JSON body, or false to use + GET requests with query params. + CACHE (bool): Whether server should cache the result of the request/ + If true then transparently adds a txn_id to all requests, and + `_handle_request` must return a Deferred. + RETRY_ON_TIMEOUT(bool): Whether or not to retry the request when a 504 + is received. + """ + + __metaclass__ = abc.ABCMeta + + NAME = abc.abstractproperty() + PATH_ARGS = abc.abstractproperty() + + POST = True + CACHE = True + RETRY_ON_TIMEOUT = True + + def __init__(self, hs): + if self.CACHE: + self.response_cache = ResponseCache( + hs, "repl." + self.NAME, + timeout_ms=30 * 60 * 1000, + ) + + @abc.abstractmethod + def _serialize_payload(**kwargs): + """Static method that is called when creating a request. + + Concrete implementations should have explicit parameters (rather than + kwargs) so that an appropriate exception is raised if the client is + called with unexpected parameters. All PATH_ARGS must appear in + argument list. + + Returns: + Deferred[dict]|dict: If POST request then dictionary must be JSON + serialisable, otherwise must be appropriate for adding as query + args. + """ + return {} + + @abc.abstractmethod + def _handle_request(self, request, **kwargs): + """Handle incoming request. + + This is called with the request object and PATH_ARGS. + + Returns: + Deferred[dict]: A JSON serialisable dict to be used as response + body of request. + """ + pass + + @classmethod + def make_client(cls, hs): + """Create a client that makes requests. + + Returns a callable that accepts the same parameters as `_serialize_payload`. + """ + clock = hs.get_clock() + host = hs.config.worker_replication_host + port = hs.config.worker_replication_http_port + + client = hs.get_simple_http_client() + + @defer.inlineCallbacks + def send_request(**kwargs): + data = yield cls._serialize_payload(**kwargs) + + url_args = [urllib.parse.quote(kwargs[name]) for name in cls.PATH_ARGS] + + if cls.CACHE: + txn_id = random_string(10) + url_args.append(txn_id) + + if cls.POST: + request_func = client.post_json_get_json + else: + request_func = client.get_json + + uri = "http://%s:%s/_synapse/replication/%s/%s" % ( + host, port, cls.NAME, "/".join(url_args) + ) + + try: + # We keep retrying the same request for timeouts. This is so that we + # have a good idea that the request has either succeeded or failed on + # the master, and so whether we should clean up or not. + while True: + try: + result = yield request_func(uri, data) + break + except CodeMessageException as e: + if e.code != 504 or not cls.RETRY_ON_TIMEOUT: + raise + + logger.warn("send_federation_events_to_master request timed out") + + # If we timed out we probably don't need to worry about backing + # off too much, but lets just wait a little anyway. + yield clock.sleep(1) + except HttpResponseException as e: + # We convert to SynapseError as we know that it was a SynapseError + # on the master process that we should send to the client. (And + # importantly, not stack traces everywhere) + raise e.to_synapse_error() + + defer.returnValue(result) + + return send_request + + def register(self, http_server): + """Called by the server to register this as a handler to the + appropriate path. + """ + + url_args = list(self.PATH_ARGS) + method = "GET" + handler = self._handle_request + if self.POST: + method = "POST" + + if self.CACHE: + handler = self._cached_handler + url_args.append("txn_id") + + args = "/".join("(?P<%s>[^/]+)" % (arg,) for arg in url_args) + pattern = re.compile("^/_synapse/replication/%s/%s$" % ( + self.NAME, + args + )) + + http_server.register_paths(method, [pattern], handler) + + def _cached_handler(self, request, txn_id, **kwargs): + """Wraps `_handle_request` the responses should be cached. + """ + # We just use the txn_id here, but we probably also want to use the + # other PATH_ARGS as well. + + assert self.CACHE + + return self.response_cache.wrap( + txn_id, + self._handle_request, + request, **kwargs + ) diff --git a/synapse/replication/http/membership.py b/synapse/replication/http/membership.py index 7a3cfb159c..8ad83e8421 100644 --- a/synapse/replication/http/membership.py +++ b/synapse/replication/http/membership.py @@ -14,182 +14,53 @@ # limitations under the License. import logging -import re from twisted.internet import defer -from synapse.api.errors import HttpResponseException -from synapse.http.servlet import RestServlet, parse_json_object_from_request +from synapse.http.servlet import parse_json_object_from_request +from synapse.replication.http._base import ReplicationEndpoint from synapse.types import Requester, UserID from synapse.util.distributor import user_joined_room, user_left_room logger = logging.getLogger(__name__) -@defer.inlineCallbacks -def remote_join(client, host, port, requester, remote_room_hosts, - room_id, user_id, content): - """Ask the master to do a remote join for the given user to the given room - - Args: - client (SimpleHttpClient) - host (str): host of master - port (int): port on master listening for HTTP replication - requester (Requester) - remote_room_hosts (list[str]): Servers to try and join via - room_id (str) - user_id (str) - content (dict): The event content to use for the join event - - Returns: - Deferred - """ - uri = "http://%s:%s/_synapse/replication/remote_join" % (host, port) - - payload = { - "requester": requester.serialize(), - "remote_room_hosts": remote_room_hosts, - "room_id": room_id, - "user_id": user_id, - "content": content, - } - - try: - result = yield client.post_json_get_json(uri, payload) - except HttpResponseException as e: - # We convert to SynapseError as we know that it was a SynapseError - # on the master process that we should send to the client. (And - # importantly, not stack traces everywhere) - raise e.to_synapse_error() - defer.returnValue(result) - - -@defer.inlineCallbacks -def remote_reject_invite(client, host, port, requester, remote_room_hosts, - room_id, user_id): - """Ask master to reject the invite for the user and room. - - Args: - client (SimpleHttpClient) - host (str): host of master - port (int): port on master listening for HTTP replication - requester (Requester) - remote_room_hosts (list[str]): Servers to try and reject via - room_id (str) - user_id (str) - - Returns: - Deferred - """ - uri = "http://%s:%s/_synapse/replication/remote_reject_invite" % (host, port) - - payload = { - "requester": requester.serialize(), - "remote_room_hosts": remote_room_hosts, - "room_id": room_id, - "user_id": user_id, - } - - try: - result = yield client.post_json_get_json(uri, payload) - except HttpResponseException as e: - # We convert to SynapseError as we know that it was a SynapseError - # on the master process that we should send to the client. (And - # importantly, not stack traces everywhere) - raise e.to_synapse_error() - defer.returnValue(result) - - -@defer.inlineCallbacks -def get_or_register_3pid_guest(client, host, port, requester, - medium, address, inviter_user_id): - """Ask the master to get/create a guest account for given 3PID. - - Args: - client (SimpleHttpClient) - host (str): host of master - port (int): port on master listening for HTTP replication - requester (Requester) - medium (str) - address (str) - inviter_user_id (str): The user ID who is trying to invite the - 3PID - - Returns: - Deferred[(str, str)]: A 2-tuple of `(user_id, access_token)` of the - 3PID guest account. - """ - - uri = "http://%s:%s/_synapse/replication/get_or_register_3pid_guest" % (host, port) - - payload = { - "requester": requester.serialize(), - "medium": medium, - "address": address, - "inviter_user_id": inviter_user_id, - } - - try: - result = yield client.post_json_get_json(uri, payload) - except HttpResponseException as e: - # We convert to SynapseError as we know that it was a SynapseError - # on the master process that we should send to the client. (And - # importantly, not stack traces everywhere) - raise e.to_synapse_error() - defer.returnValue(result) - - -@defer.inlineCallbacks -def notify_user_membership_change(client, host, port, user_id, room_id, change): - """Notify master that a user has joined or left the room - - Args: - client (SimpleHttpClient) - host (str): host of master - port (int): port on master listening for HTTP replication. - user_id (str) - room_id (str) - change (str): Either "join" or "left" - - Returns: - Deferred +class ReplicationRemoteJoinRestServlet(ReplicationEndpoint): + """Does a remote join for the given user to the given room """ - assert change in ("joined", "left") - - uri = "http://%s:%s/_synapse/replication/user_%s_room" % (host, port, change) - - payload = { - "user_id": user_id, - "room_id": room_id, - } - - try: - result = yield client.post_json_get_json(uri, payload) - except HttpResponseException as e: - # We convert to SynapseError as we know that it was a SynapseError - # on the master process that we should send to the client. (And - # importantly, not stack traces everywhere) - raise e.to_synapse_error() - defer.returnValue(result) - -class ReplicationRemoteJoinRestServlet(RestServlet): - PATTERNS = [re.compile("^/_synapse/replication/remote_join$")] + NAME = "remote_join" + PATH_ARGS = ("room_id", "user_id",) def __init__(self, hs): - super(ReplicationRemoteJoinRestServlet, self).__init__() + super(ReplicationRemoteJoinRestServlet, self).__init__(hs) self.federation_handler = hs.get_handlers().federation_handler self.store = hs.get_datastore() self.clock = hs.get_clock() + @staticmethod + def _serialize_payload(requester, room_id, user_id, remote_room_hosts, + content): + """ + Args: + requester(Requester) + room_id (str) + user_id (str) + remote_room_hosts (list[str]): Servers to try and join via + content(dict): The event content to use for the join event + """ + return { + "requester": requester.serialize(), + "remote_room_hosts": remote_room_hosts, + "content": content, + } + @defer.inlineCallbacks - def on_POST(self, request): + def _handle_request(self, request, room_id, user_id): content = parse_json_object_from_request(request) remote_room_hosts = content["remote_room_hosts"] - room_id = content["room_id"] - user_id = content["user_id"] event_content = content["content"] requester = Requester.deserialize(self.store, content["requester"]) @@ -212,23 +83,39 @@ class ReplicationRemoteJoinRestServlet(RestServlet): defer.returnValue((200, {})) -class ReplicationRemoteRejectInviteRestServlet(RestServlet): - PATTERNS = [re.compile("^/_synapse/replication/remote_reject_invite$")] +class ReplicationRemoteRejectInviteRestServlet(ReplicationEndpoint): + """Rejects the invite for the user and room. + """ + + NAME = "remote_reject_invite" + PATH_ARGS = ("room_id", "user_id",) def __init__(self, hs): - super(ReplicationRemoteRejectInviteRestServlet, self).__init__() + super(ReplicationRemoteRejectInviteRestServlet, self).__init__(hs) self.federation_handler = hs.get_handlers().federation_handler self.store = hs.get_datastore() self.clock = hs.get_clock() + @staticmethod + def _serialize_payload(requester, room_id, user_id, remote_room_hosts): + """ + Args: + requester(Requester) + room_id (str) + user_id (str) + remote_room_hosts (list[str]): Servers to try and reject via + """ + return { + "requester": requester.serialize(), + "remote_room_hosts": remote_room_hosts, + } + @defer.inlineCallbacks - def on_POST(self, request): + def _handle_request(self, request, room_id, user_id): content = parse_json_object_from_request(request) remote_room_hosts = content["remote_room_hosts"] - room_id = content["room_id"] - user_id = content["user_id"] requester = Requester.deserialize(self.store, content["requester"]) @@ -264,18 +151,39 @@ class ReplicationRemoteRejectInviteRestServlet(RestServlet): defer.returnValue((200, ret)) -class ReplicationRegister3PIDGuestRestServlet(RestServlet): - PATTERNS = [re.compile("^/_synapse/replication/get_or_register_3pid_guest$")] +class ReplicationRegister3PIDGuestRestServlet(ReplicationEndpoint): + """Gets/creates a guest account for given 3PID. + """ + + NAME = "get_or_register_3pid_guest" + PATH_ARGS = () def __init__(self, hs): - super(ReplicationRegister3PIDGuestRestServlet, self).__init__() + super(ReplicationRegister3PIDGuestRestServlet, self).__init__(hs) self.registeration_handler = hs.get_handlers().registration_handler self.store = hs.get_datastore() self.clock = hs.get_clock() + @staticmethod + def _serialize_payload(requester, medium, address, inviter_user_id): + """ + Args: + requester(Requester) + medium (str) + address (str) + inviter_user_id (str): The user ID who is trying to invite the + 3PID + """ + return { + "requester": requester.serialize(), + "medium": medium, + "address": address, + "inviter_user_id": inviter_user_id, + } + @defer.inlineCallbacks - def on_POST(self, request): + def _handle_request(self, request): content = parse_json_object_from_request(request) medium = content["medium"] @@ -296,23 +204,35 @@ class ReplicationRegister3PIDGuestRestServlet(RestServlet): defer.returnValue((200, ret)) -class ReplicationUserJoinedLeftRoomRestServlet(RestServlet): - PATTERNS = [re.compile("^/_synapse/replication/user_(?P<change>joined|left)_room$")] +class ReplicationUserJoinedLeftRoomRestServlet(ReplicationEndpoint): + """Notifies that a user has joined or left the room + """ + + NAME = "membership_change" + PATH_ARGS = ("room_id", "user_id", "change") + CACHE = False # No point caching as should return instantly. def __init__(self, hs): - super(ReplicationUserJoinedLeftRoomRestServlet, self).__init__() + super(ReplicationUserJoinedLeftRoomRestServlet, self).__init__(hs) self.registeration_handler = hs.get_handlers().registration_handler self.store = hs.get_datastore() self.clock = hs.get_clock() self.distributor = hs.get_distributor() - def on_POST(self, request, change): - content = parse_json_object_from_request(request) + @staticmethod + def _serialize_payload(room_id, user_id, change): + """ + Args: + room_id (str) + user_id (str) + change (str): Either "joined" or "left" + """ + assert change in ("joined", "left",) - user_id = content["user_id"] - room_id = content["room_id"] + return {} + def _handle_request(self, request, room_id, user_id, change): logger.info("user membership change: %s in %s", user_id, room_id) user = UserID.from_string(user_id) diff --git a/synapse/replication/http/send_event.py b/synapse/replication/http/send_event.py index d3509dc288..50810d94cb 100644 --- a/synapse/replication/http/send_event.py +++ b/synapse/replication/http/send_event.py @@ -14,86 +14,26 @@ # limitations under the License. import logging -import re from twisted.internet import defer -from synapse.api.errors import CodeMessageException, HttpResponseException from synapse.events import FrozenEvent from synapse.events.snapshot import EventContext -from synapse.http.servlet import RestServlet, parse_json_object_from_request +from synapse.http.servlet import parse_json_object_from_request +from synapse.replication.http._base import ReplicationEndpoint from synapse.types import Requester, UserID -from synapse.util.caches.response_cache import ResponseCache from synapse.util.metrics import Measure logger = logging.getLogger(__name__) -@defer.inlineCallbacks -def send_event_to_master(clock, store, client, host, port, requester, event, context, - ratelimit, extra_users): - """Send event to be handled on the master - - Args: - clock (synapse.util.Clock) - store (DataStore) - client (SimpleHttpClient) - host (str): host of master - port (int): port on master listening for HTTP replication - requester (Requester) - event (FrozenEvent) - context (EventContext) - ratelimit (bool) - extra_users (list(UserID)): Any extra users to notify about event - """ - uri = "http://%s:%s/_synapse/replication/send_event/%s" % ( - host, port, event.event_id, - ) - - serialized_context = yield context.serialize(event, store) - - payload = { - "event": event.get_pdu_json(), - "internal_metadata": event.internal_metadata.get_dict(), - "rejected_reason": event.rejected_reason, - "context": serialized_context, - "requester": requester.serialize(), - "ratelimit": ratelimit, - "extra_users": [u.to_string() for u in extra_users], - } - - try: - # We keep retrying the same request for timeouts. This is so that we - # have a good idea that the request has either succeeded or failed on - # the master, and so whether we should clean up or not. - while True: - try: - result = yield client.put_json(uri, payload) - break - except CodeMessageException as e: - if e.code != 504: - raise - - logger.warn("send_event request timed out") - - # If we timed out we probably don't need to worry about backing - # off too much, but lets just wait a little anyway. - yield clock.sleep(1) - except HttpResponseException as e: - # We convert to SynapseError as we know that it was a SynapseError - # on the master process that we should send to the client. (And - # importantly, not stack traces everywhere) - raise e.to_synapse_error() - defer.returnValue(result) - - -class ReplicationSendEventRestServlet(RestServlet): +class ReplicationSendEventRestServlet(ReplicationEndpoint): """Handles events newly created on workers, including persisting and notifying. The API looks like: - POST /_synapse/replication/send_event/:event_id + POST /_synapse/replication/send_event/:event_id/:txn_id { "event": { .. serialized event .. }, @@ -105,27 +45,48 @@ class ReplicationSendEventRestServlet(RestServlet): "extra_users": [], } """ - PATTERNS = [re.compile("^/_synapse/replication/send_event/(?P<event_id>[^/]+)$")] + NAME = "send_event" + PATH_ARGS = ("event_id",) + POST = True def __init__(self, hs): - super(ReplicationSendEventRestServlet, self).__init__() + super(ReplicationSendEventRestServlet, self).__init__(hs) self.event_creation_handler = hs.get_event_creation_handler() self.store = hs.get_datastore() self.clock = hs.get_clock() - # The responses are tiny, so we may as well cache them for a while - self.response_cache = ResponseCache(hs, "send_event", timeout_ms=30 * 60 * 1000) + @staticmethod + @defer.inlineCallbacks + def _serialize_payload(event_id, store, event, context, requester, + ratelimit, extra_users): + """ + Args: + event_id (str) + store (DataStore) + requester (Requester) + event (FrozenEvent) + context (EventContext) + ratelimit (bool) + extra_users (list(UserID)): Any extra users to notify about event + """ + + serialized_context = yield context.serialize(event, store) + + payload = { + "event": event.get_pdu_json(), + "internal_metadata": event.internal_metadata.get_dict(), + "rejected_reason": event.rejected_reason, + "context": serialized_context, + "requester": requester.serialize(), + "ratelimit": ratelimit, + "extra_users": [u.to_string() for u in extra_users], + } - def on_PUT(self, request, event_id): - return self.response_cache.wrap( - event_id, - self._handle_request, - request - ) + defer.returnValue(payload) @defer.inlineCallbacks - def _handle_request(self, request): + def _handle_request(self, request, event_id): with Measure(self.clock, "repl_send_event_parse"): content = parse_json_object_from_request(request) |