Split transport layer into client and server parts

This commit is contained in:
Mark Haines 2015-01-16 13:21:14 +00:00
parent 2bdee98269
commit 602684eac5
3 changed files with 321 additions and 272 deletions

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@ -0,0 +1,62 @@
# -*- 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.
"""The transport layer is responsible for both sending transactions to remote
home servers and receiving a variety of requests from other home servers.
By default this is done over HTTPS (and all home servers are required to
support HTTPS), however individual pairings of servers may decide to
communicate over a different (albeit still reliable) protocol.
"""
from .server import TransportLayerServer
from .client import TransportLayerClient
class TransportLayer(TransportLayerServer, TransportLayerClient):
"""This is a basic implementation of the transport layer that translates
transactions and other requests to/from HTTP.
Attributes:
server_name (str): Local home server host
server (synapse.http.server.HttpServer): the http server to
register listeners on
client (synapse.http.client.HttpClient): the http client used to
send requests
request_handler (TransportRequestHandler): The handler to fire when we
receive requests for data.
received_handler (TransportReceivedHandler): The handler to fire when
we receive data.
"""
def __init__(self, homeserver, server_name, server, client):
"""
Args:
server_name (str): Local home server host
server (synapse.protocol.http.HttpServer): the http server to
register listeners on
client (synapse.protocol.http.HttpClient): the http client used to
send requests
"""
self.keyring = homeserver.get_keyring()
self.server_name = server_name
self.server = server
self.client = client
self.request_handler = None
self.received_handler = None

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@ -0,0 +1,257 @@
# -*- 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.urls import FEDERATION_PREFIX as PREFIX
from synapse.util.logutils import log_function
import logging
import json
logger = logging.getLogger(__name__)
class TransportLayerClient(object):
"""Sends federation HTTP requests to other servers"""
@log_function
def get_context_state(self, destination, context, event_id=None):
""" Requests all state for a given context (i.e. room) from the
given server.
Args:
destination (str): The host name of the remote home server we want
to get the state from.
context (str): The name of the context we want the state of
Returns:
Deferred: Results in a dict received from the remote homeserver.
"""
logger.debug("get_context_state dest=%s, context=%s",
destination, context)
subpath = "/state/%s/" % context
args = {}
if event_id:
args["event_id"] = event_id
return self._do_request_for_transaction(
destination, subpath, args=args
)
@log_function
def get_event(self, destination, event_id):
""" Requests the pdu with give id and origin from the given server.
Args:
destination (str): The host name of the remote home server we want
to get the state from.
event_id (str): The id of the event being requested.
Returns:
Deferred: Results in a dict received from the remote homeserver.
"""
logger.debug("get_pdu dest=%s, event_id=%s",
destination, event_id)
subpath = "/event/%s/" % (event_id, )
return self._do_request_for_transaction(destination, subpath)
@log_function
def backfill(self, dest, context, event_tuples, limit):
""" Requests `limit` previous PDUs in a given context before list of
PDUs.
Args:
dest (str)
context (str)
event_tuples (list)
limt (int)
Returns:
Deferred: Results in a dict received from the remote homeserver.
"""
logger.debug(
"backfill dest=%s, context=%s, event_tuples=%s, limit=%s",
dest, context, repr(event_tuples), str(limit)
)
if not event_tuples:
# TODO: raise?
return
subpath = "/backfill/%s/" % (context,)
args = {
"v": event_tuples,
"limit": [str(limit)],
}
return self._do_request_for_transaction(
dest,
subpath,
args=args,
)
@defer.inlineCallbacks
@log_function
def send_transaction(self, transaction, json_data_callback=None):
""" Sends the given Transaction to its destination
Args:
transaction (Transaction)
Returns:
Deferred: Results of the deferred is a tuple in the form of
(response_code, response_body) where the response_body is a
python dict decoded from json
"""
logger.debug(
"send_data dest=%s, txid=%s",
transaction.destination, transaction.transaction_id
)
if transaction.destination == self.server_name:
raise RuntimeError("Transport layer cannot send to itself!")
# FIXME: This is only used by the tests. The actual json sent is
# generated by the json_data_callback.
json_data = transaction.get_dict()
code, response = yield self.client.put_json(
transaction.destination,
path=PREFIX + "/send/%s/" % transaction.transaction_id,
data=json_data,
json_data_callback=json_data_callback,
)
logger.debug(
"send_data dest=%s, txid=%s, got response: %d",
transaction.destination, transaction.transaction_id, code
)
defer.returnValue((code, response))
@defer.inlineCallbacks
@log_function
def make_query(self, destination, query_type, args, retry_on_dns_fail):
path = PREFIX + "/query/%s" % query_type
response = yield self.client.get_json(
destination=destination,
path=path,
args=args,
retry_on_dns_fail=retry_on_dns_fail,
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def make_join(self, destination, context, user_id, retry_on_dns_fail=True):
path = PREFIX + "/make_join/%s/%s" % (context, user_id,)
response = yield self.client.get_json(
destination=destination,
path=path,
retry_on_dns_fail=retry_on_dns_fail,
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def send_join(self, destination, context, event_id, content):
path = PREFIX + "/send_join/%s/%s" % (
context,
event_id,
)
code, content = yield self.client.put_json(
destination=destination,
path=path,
data=content,
)
if not 200 <= code < 300:
raise RuntimeError("Got %d from send_join", code)
defer.returnValue(json.loads(content))
@defer.inlineCallbacks
@log_function
def send_invite(self, destination, context, event_id, content):
path = PREFIX + "/invite/%s/%s" % (
context,
event_id,
)
code, content = yield self.client.put_json(
destination=destination,
path=path,
data=content,
)
if not 200 <= code < 300:
raise RuntimeError("Got %d from send_invite", code)
defer.returnValue(json.loads(content))
@defer.inlineCallbacks
@log_function
def get_event_auth(self, destination, context, event_id):
path = PREFIX + "/event_auth/%s/%s" % (
context,
event_id,
)
response = yield self.client.get_json(
destination=destination,
path=path,
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def _do_request_for_transaction(self, destination, subpath, args={}):
"""
Args:
destination (str)
path (str)
args (dict): This is parsed directly to the HttpClient.
Returns:
Deferred: Results in a dict.
"""
data = yield self.client.get_json(
destination,
path=PREFIX + subpath,
args=args,
)
# Add certain keys to the JSON, ready for decoding as a Transaction
data.update(
origin=destination,
destination=self.server_name,
transaction_id=None
)
defer.returnValue(data)

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@ -13,14 +13,6 @@
# See the License for the specific language governing permissions and
# limitations under the License.
"""The transport layer is responsible for both sending transactions to remote
home servers and receiving a variety of requests from other home servers.
Typically, this is done over HTTP (and all home servers are required to
support HTTP), however individual pairings of servers may decide to communicate
over a different (albeit still reliable) protocol.
"""
from twisted.internet import defer
from synapse.api.urls import FEDERATION_PREFIX as PREFIX
@ -35,241 +27,8 @@ import re
logger = logging.getLogger(__name__)
class TransportLayer(object):
"""This is a basic implementation of the transport layer that translates
transactions and other requests to/from HTTP.
Attributes:
server_name (str): Local home server host
server (synapse.http.server.HttpServer): the http server to
register listeners on
client (synapse.http.client.HttpClient): the http client used to
send requests
request_handler (TransportRequestHandler): The handler to fire when we
receive requests for data.
received_handler (TransportReceivedHandler): The handler to fire when
we receive data.
"""
def __init__(self, homeserver, server_name, server, client):
"""
Args:
server_name (str): Local home server host
server (synapse.protocol.http.HttpServer): the http server to
register listeners on
client (synapse.protocol.http.HttpClient): the http client used to
send requests
"""
self.keyring = homeserver.get_keyring()
self.server_name = server_name
self.server = server
self.client = client
self.request_handler = None
self.received_handler = None
@log_function
def get_context_state(self, destination, context, event_id=None):
""" Requests all state for a given context (i.e. room) from the
given server.
Args:
destination (str): The host name of the remote home server we want
to get the state from.
context (str): The name of the context we want the state of
Returns:
Deferred: Results in a dict received from the remote homeserver.
"""
logger.debug("get_context_state dest=%s, context=%s",
destination, context)
subpath = "/state/%s/" % context
args = {}
if event_id:
args["event_id"] = event_id
return self._do_request_for_transaction(
destination, subpath, args=args
)
@log_function
def get_event(self, destination, event_id):
""" Requests the pdu with give id and origin from the given server.
Args:
destination (str): The host name of the remote home server we want
to get the state from.
event_id (str): The id of the event being requested.
Returns:
Deferred: Results in a dict received from the remote homeserver.
"""
logger.debug("get_pdu dest=%s, event_id=%s",
destination, event_id)
subpath = "/event/%s/" % (event_id, )
return self._do_request_for_transaction(destination, subpath)
@log_function
def backfill(self, dest, context, event_tuples, limit):
""" Requests `limit` previous PDUs in a given context before list of
PDUs.
Args:
dest (str)
context (str)
event_tuples (list)
limt (int)
Returns:
Deferred: Results in a dict received from the remote homeserver.
"""
logger.debug(
"backfill dest=%s, context=%s, event_tuples=%s, limit=%s",
dest, context, repr(event_tuples), str(limit)
)
if not event_tuples:
# TODO: raise?
return
subpath = "/backfill/%s/" % (context,)
args = {
"v": event_tuples,
"limit": [str(limit)],
}
return self._do_request_for_transaction(
dest,
subpath,
args=args,
)
@defer.inlineCallbacks
@log_function
def send_transaction(self, transaction, json_data_callback=None):
""" Sends the given Transaction to its destination
Args:
transaction (Transaction)
Returns:
Deferred: Results of the deferred is a tuple in the form of
(response_code, response_body) where the response_body is a
python dict decoded from json
"""
logger.debug(
"send_data dest=%s, txid=%s",
transaction.destination, transaction.transaction_id
)
if transaction.destination == self.server_name:
raise RuntimeError("Transport layer cannot send to itself!")
# FIXME: This is only used by the tests. The actual json sent is
# generated by the json_data_callback.
json_data = transaction.get_dict()
code, response = yield self.client.put_json(
transaction.destination,
path=PREFIX + "/send/%s/" % transaction.transaction_id,
data=json_data,
json_data_callback=json_data_callback,
)
logger.debug(
"send_data dest=%s, txid=%s, got response: %d",
transaction.destination, transaction.transaction_id, code
)
defer.returnValue((code, response))
@defer.inlineCallbacks
@log_function
def make_query(self, destination, query_type, args, retry_on_dns_fail):
path = PREFIX + "/query/%s" % query_type
response = yield self.client.get_json(
destination=destination,
path=path,
args=args,
retry_on_dns_fail=retry_on_dns_fail,
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def make_join(self, destination, context, user_id, retry_on_dns_fail=True):
path = PREFIX + "/make_join/%s/%s" % (context, user_id,)
response = yield self.client.get_json(
destination=destination,
path=path,
retry_on_dns_fail=retry_on_dns_fail,
)
defer.returnValue(response)
@defer.inlineCallbacks
@log_function
def send_join(self, destination, context, event_id, content):
path = PREFIX + "/send_join/%s/%s" % (
context,
event_id,
)
code, content = yield self.client.put_json(
destination=destination,
path=path,
data=content,
)
if not 200 <= code < 300:
raise RuntimeError("Got %d from send_join", code)
defer.returnValue(json.loads(content))
@defer.inlineCallbacks
@log_function
def send_invite(self, destination, context, event_id, content):
path = PREFIX + "/invite/%s/%s" % (
context,
event_id,
)
code, content = yield self.client.put_json(
destination=destination,
path=path,
data=content,
)
if not 200 <= code < 300:
raise RuntimeError("Got %d from send_invite", code)
defer.returnValue(json.loads(content))
@defer.inlineCallbacks
@log_function
def get_event_auth(self, destination, context, event_id):
path = PREFIX + "/event_auth/%s/%s" % (
context,
event_id,
)
response = yield self.client.get_json(
destination=destination,
path=path,
)
defer.returnValue(response)
class TransportLayerServer(object):
"""Handles incoming federation HTTP requests"""
@defer.inlineCallbacks
def _authenticate_request(self, request):
@ -373,8 +132,6 @@ class TransportLayer(object):
"""
self.request_handler = handler
# TODO(markjh): Namespace the federation URI paths
# This is for when someone asks us for everything since version X
self.server.register_path(
"GET",
@ -528,33 +285,6 @@ class TransportLayer(object):
defer.returnValue((code, response))
@defer.inlineCallbacks
@log_function
def _do_request_for_transaction(self, destination, subpath, args={}):
"""
Args:
destination (str)
path (str)
args (dict): This is parsed directly to the HttpClient.
Returns:
Deferred: Results in a dict.
"""
data = yield self.client.get_json(
destination,
path=PREFIX + subpath,
args=args,
)
# Add certain keys to the JSON, ready for decoding as a Transaction
data.update(
origin=destination,
destination=self.server_name,
transaction_id=None
)
defer.returnValue(data)
@log_function
def _on_backfill_request(self, origin, context, v_list, limits):