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MatrixSynapse/tests/server.py

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# Copyright 2018-2021 The Matrix.org Foundation C.I.C.
#
# 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 hashlib
import json
import logging
import os
import os.path
import time
import uuid
import warnings
from collections import deque
from io import SEEK_END, BytesIO
from typing import (
Callable,
Dict,
Iterable,
MutableMapping,
Optional,
Tuple,
Type,
Union,
)
from unittest.mock import Mock
import attr
from typing_extensions import Deque
from zope.interface import implementer
from twisted.internet import address, threads, udp
from twisted.internet._resolver import SimpleResolverComplexifier
from twisted.internet.defer import Deferred, fail, maybeDeferred, succeed
from twisted.internet.error import DNSLookupError
from twisted.internet.interfaces import (
IAddress,
IHostnameResolver,
IProtocol,
IPullProducer,
IPushProducer,
IReactorPluggableNameResolver,
IReactorTime,
IResolverSimple,
ITransport,
)
from twisted.python.failure import Failure
from twisted.test.proto_helpers import (
AccumulatingProtocol,
MemoryReactor,
MemoryReactorClock,
)
from twisted.web.http_headers import Headers
from twisted.web.resource import IResource
from twisted.web.server import Request, Site
from synapse.config.database import DatabaseConnectionConfig
from synapse.http.site import SynapseRequest
from synapse.logging.context import ContextResourceUsage
from synapse.server import HomeServer
from synapse.storage import DataStore
from synapse.storage.engines import PostgresEngine, create_engine
from synapse.types import JsonDict
from synapse.util import Clock
from tests.utils import (
LEAVE_DB,
POSTGRES_BASE_DB,
POSTGRES_HOST,
POSTGRES_PASSWORD,
POSTGRES_PORT,
POSTGRES_USER,
SQLITE_PERSIST_DB,
USE_POSTGRES_FOR_TESTS,
MockClock,
default_config,
)
logger = logging.getLogger(__name__)
# the type of thing that can be passed into `make_request` in the headers list
CustomHeaderType = Tuple[Union[str, bytes], Union[str, bytes]]
class TimedOutException(Exception):
"""
A web query timed out.
"""
@attr.s(auto_attribs=True)
class FakeChannel:
"""
A fake Twisted Web Channel (the part that interfaces with the
wire).
"""
site: Union[Site, "FakeSite"]
_reactor: MemoryReactor
result: dict = attr.Factory(dict)
_ip: str = "127.0.0.1"
_producer: Optional[Union[IPullProducer, IPushProducer]] = None
resource_usage: Optional[ContextResourceUsage] = None
@property
def json_body(self):
return json.loads(self.text_body)
@property
def text_body(self) -> str:
"""The body of the result, utf-8-decoded.
Raises an exception if the request has not yet completed.
"""
if not self.is_finished:
raise Exception("Request not yet completed")
return self.result["body"].decode("utf8")
def is_finished(self) -> bool:
"""check if the response has been completely received"""
return self.result.get("done", False)
@property
def code(self):
if not self.result:
raise Exception("No result yet.")
return int(self.result["code"])
@property
def headers(self) -> Headers:
if not self.result:
raise Exception("No result yet.")
h = Headers()
for i in self.result["headers"]:
h.addRawHeader(*i)
return h
def writeHeaders(self, version, code, reason, headers):
self.result["version"] = version
self.result["code"] = code
self.result["reason"] = reason
self.result["headers"] = headers
def write(self, content):
assert isinstance(content, bytes), "Should be bytes! " + repr(content)
if "body" not in self.result:
self.result["body"] = b""
self.result["body"] += content
def registerProducer(self, producer, streaming):
self._producer = producer
self.producerStreaming = streaming
def _produce():
if self._producer:
self._producer.resumeProducing()
self._reactor.callLater(0.1, _produce)
if not streaming:
self._reactor.callLater(0.0, _produce)
def unregisterProducer(self):
if self._producer is None:
return
self._producer = None
def requestDone(self, _self):
self.result["done"] = True
if isinstance(_self, SynapseRequest):
self.resource_usage = _self.logcontext.get_resource_usage()
def getPeer(self):
# We give an address so that getClientIP returns a non null entry,
# causing us to record the MAU
return address.IPv4Address("TCP", self._ip, 3423)
def getHost(self):
# this is called by Request.__init__ to configure Request.host.
return address.IPv4Address("TCP", "127.0.0.1", 8888)
def isSecure(self):
return False
@property
def transport(self):
return self
def await_result(self, timeout_ms: int = 1000) -> None:
"""
Wait until the request is finished.
"""
end_time = self._reactor.seconds() + timeout_ms / 1000.0
self._reactor.run()
while not self.is_finished():
# If there's a producer, tell it to resume producing so we get content
if self._producer:
self._producer.resumeProducing()
if self._reactor.seconds() > end_time:
raise TimedOutException("Timed out waiting for request to finish.")
self._reactor.advance(0.1)
def extract_cookies(self, cookies: MutableMapping[str, str]) -> None:
"""Process the contents of any Set-Cookie headers in the response
Any cookines found are added to the given dict
"""
headers = self.headers.getRawHeaders("Set-Cookie")
if not headers:
return
for h in headers:
parts = h.split(";")
k, v = parts[0].split("=", maxsplit=1)
cookies[k] = v
class FakeSite:
"""
A fake Twisted Web Site, with mocks of the extra things that
Synapse adds.
"""
server_version_string = b"1"
site_tag = "test"
access_logger = logging.getLogger("synapse.access.http.fake")
def __init__(self, resource: IResource, reactor: IReactorTime):
"""
Args:
resource: the resource to be used for rendering all requests
"""
self._resource = resource
self.reactor = reactor
def getResourceFor(self, request):
return self._resource
def make_request(
reactor,
site: Union[Site, FakeSite],
method: Union[bytes, str],
path: Union[bytes, str],
content: Union[bytes, str, JsonDict] = b"",
access_token: Optional[str] = None,
request: Type[Request] = SynapseRequest,
shorthand: bool = True,
federation_auth_origin: Optional[bytes] = None,
content_is_form: bool = False,
await_result: bool = True,
custom_headers: Optional[Iterable[CustomHeaderType]] = None,
client_ip: str = "127.0.0.1",
) -> FakeChannel:
"""
Make a web request using the given method, path and content, and render it
Returns the fake Channel object which records the response to the request.
Args:
reactor:
site: The twisted Site to use to render the request
method: The HTTP request method ("verb").
path: The HTTP path, suitably URL encoded (e.g. escaped UTF-8 & spaces and such).
content: The body of the request. JSON-encoded, if a str of bytes.
access_token: The access token to add as authorization for the request.
request: The request class to create.
shorthand: Whether to try and be helpful and prefix the given URL
with the usual REST API path, if it doesn't contain it.
federation_auth_origin: if set to not-None, we will add a fake
Authorization header pretenting to be the given server name.
content_is_form: Whether the content is URL encoded form data. Adds the
'Content-Type': 'application/x-www-form-urlencoded' header.
await_result: whether to wait for the request to complete rendering. If true,
will pump the reactor until the the renderer tells the channel the request
is finished.
custom_headers: (name, value) pairs to add as request headers
client_ip: The IP to use as the requesting IP. Useful for testing
ratelimiting.
Returns:
channel
"""
if not isinstance(method, bytes):
method = method.encode("ascii")
if not isinstance(path, bytes):
path = path.encode("ascii")
# Decorate it to be the full path, if we're using shorthand
if (
shorthand
and not path.startswith(b"/_matrix")
and not path.startswith(b"/_synapse")
):
if path.startswith(b"/"):
path = path[1:]
path = b"/_matrix/client/r0/" + path
if not path.startswith(b"/"):
path = b"/" + path
if isinstance(content, dict):
content = json.dumps(content).encode("utf8")
if isinstance(content, str):
content = content.encode("utf8")
channel = FakeChannel(site, reactor, ip=client_ip)
req = request(channel, site)
req.content = BytesIO(content)
# Twisted expects to be at the end of the content when parsing the request.
req.content.seek(0, SEEK_END)
if access_token:
req.requestHeaders.addRawHeader(
b"Authorization", b"Bearer " + access_token.encode("ascii")
)
if federation_auth_origin is not None:
req.requestHeaders.addRawHeader(
b"Authorization",
b"X-Matrix origin=%s,key=,sig=" % (federation_auth_origin,),
)
if content:
if content_is_form:
req.requestHeaders.addRawHeader(
b"Content-Type", b"application/x-www-form-urlencoded"
)
else:
# Assume the body is JSON
req.requestHeaders.addRawHeader(b"Content-Type", b"application/json")
if custom_headers:
for k, v in custom_headers:
req.requestHeaders.addRawHeader(k, v)
req.parseCookies()
req.requestReceived(method, path, b"1.1")
if await_result:
channel.await_result()
return channel
@implementer(IReactorPluggableNameResolver)
class ThreadedMemoryReactorClock(MemoryReactorClock):
"""
A MemoryReactorClock that supports callFromThread.
"""
def __init__(self):
self.threadpool = ThreadPool(self)
self._tcp_callbacks: Dict[Tuple[str, int], Callable] = {}
self._udp = []
self.lookups: Dict[str, str] = {}
self._thread_callbacks: Deque[Callable[[], None]] = deque()
lookups = self.lookups
@implementer(IResolverSimple)
class FakeResolver:
def getHostByName(self, name, timeout=None):
if name not in lookups:
return fail(DNSLookupError("OH NO: unknown %s" % (name,)))
return succeed(lookups[name])
self.nameResolver = SimpleResolverComplexifier(FakeResolver())
super().__init__()
def installNameResolver(self, resolver: IHostnameResolver) -> IHostnameResolver:
raise NotImplementedError()
def listenUDP(self, port, protocol, interface="", maxPacketSize=8196):
p = udp.Port(port, protocol, interface, maxPacketSize, self)
p.startListening()
self._udp.append(p)
return p
def callFromThread(self, callback, *args, **kwargs):
"""
Make the callback fire in the next reactor iteration.
"""
cb = lambda: callback(*args, **kwargs)
# it's not safe to call callLater() here, so we append the callback to a
# separate queue.
self._thread_callbacks.append(cb)
def getThreadPool(self):
return self.threadpool
def add_tcp_client_callback(self, host: str, port: int, callback: Callable):
"""Add a callback that will be invoked when we receive a connection
attempt to the given IP/port using `connectTCP`.
Note that the callback gets run before we return the connection to the
client, which means callbacks cannot block while waiting for writes.
"""
self._tcp_callbacks[(host, port)] = callback
def connectTCP(self, host: str, port: int, factory, timeout=30, bindAddress=None):
"""Fake L{IReactorTCP.connectTCP}."""
conn = super().connectTCP(
host, port, factory, timeout=timeout, bindAddress=None
)
callback = self._tcp_callbacks.get((host, port))
if callback:
callback()
return conn
def advance(self, amount):
# first advance our reactor's time, and run any "callLater" callbacks that
# makes ready
super().advance(amount)
# now run any "callFromThread" callbacks
while True:
try:
callback = self._thread_callbacks.popleft()
except IndexError:
break
callback()
# check for more "callLater" callbacks added by the thread callback
# This isn't required in a regular reactor, but it ends up meaning that
# our database queries can complete in a single call to `advance` [1] which
# simplifies tests.
#
# [1]: we replace the threadpool backing the db connection pool with a
# mock ThreadPool which doesn't really use threads; but we still use
# reactor.callFromThread to feed results back from the db functions to the
# main thread.
super().advance(0)
class ThreadPool:
"""
Threadless thread pool.
"""
def __init__(self, reactor):
self._reactor = reactor
def start(self):
pass
def stop(self):
pass
def callInThreadWithCallback(self, onResult, function, *args, **kwargs):
def _(res):
if isinstance(res, Failure):
onResult(False, res)
else:
onResult(True, res)
d = Deferred()
d.addCallback(lambda x: function(*args, **kwargs))
d.addBoth(_)
self._reactor.callLater(0, d.callback, True)
return d
def _make_test_homeserver_synchronous(server: HomeServer) -> None:
"""
Make the given test homeserver's database interactions synchronous.
"""
clock = server.get_clock()
for database in server.get_datastores().databases:
pool = database._db_pool
def runWithConnection(func, *args, **kwargs):
return threads.deferToThreadPool(
pool._reactor,
pool.threadpool,
pool._runWithConnection,
func,
*args,
**kwargs,
)
def runInteraction(interaction, *args, **kwargs):
return threads.deferToThreadPool(
pool._reactor,
pool.threadpool,
pool._runInteraction,
interaction,
*args,
**kwargs,
)
pool.runWithConnection = runWithConnection
pool.runInteraction = runInteraction
# Replace the thread pool with a threadless 'thread' pool
pool.threadpool = ThreadPool(clock._reactor)
pool.running = True
# We've just changed the Databases to run DB transactions on the same
# thread, so we need to disable the dedicated thread behaviour.
server.get_datastores().main.USE_DEDICATED_DB_THREADS_FOR_EVENT_FETCHING = False
def get_clock() -> Tuple[ThreadedMemoryReactorClock, Clock]:
clock = ThreadedMemoryReactorClock()
hs_clock = Clock(clock)
return clock, hs_clock
@implementer(ITransport)
@attr.s(cmp=False)
class FakeTransport:
"""
A twisted.internet.interfaces.ITransport implementation which sends all its data
straight into an IProtocol object: it exists to connect two IProtocols together.
To use it, instantiate it with the receiving IProtocol, and then pass it to the
sending IProtocol's makeConnection method:
server = HTTPChannel()
client.makeConnection(FakeTransport(server, self.reactor))
If you want bidirectional communication, you'll need two instances.
"""
other = attr.ib()
"""The Protocol object which will receive any data written to this transport.
:type: twisted.internet.interfaces.IProtocol
"""
_reactor = attr.ib()
"""Test reactor
:type: twisted.internet.interfaces.IReactorTime
"""
_protocol = attr.ib(default=None)
"""The Protocol which is producing data for this transport. Optional, but if set
will get called back for connectionLost() notifications etc.
"""
_peer_address: Optional[IAddress] = attr.ib(default=None)
"""The value to be returend by getPeer"""
disconnecting = False
disconnected = False
connected = True
buffer = attr.ib(default=b"")
producer = attr.ib(default=None)
autoflush = attr.ib(default=True)
def getPeer(self):
return self._peer_address
def getHost(self):
return None
def loseConnection(self, reason=None):
if not self.disconnecting:
logger.info("FakeTransport: loseConnection(%s)", reason)
self.disconnecting = True
if self._protocol:
self._protocol.connectionLost(reason)
# if we still have data to write, delay until that is done
if self.buffer:
logger.info(
"FakeTransport: Delaying disconnect until buffer is flushed"
)
else:
self.connected = False
self.disconnected = True
def abortConnection(self):
logger.info("FakeTransport: abortConnection()")
if not self.disconnecting:
self.disconnecting = True
if self._protocol:
self._protocol.connectionLost(None)
self.disconnected = True
def pauseProducing(self):
if not self.producer:
return
self.producer.pauseProducing()
def resumeProducing(self):
if not self.producer:
return
self.producer.resumeProducing()
def unregisterProducer(self):
if not self.producer:
return
self.producer = None
def registerProducer(self, producer, streaming):
self.producer = producer
self.producerStreaming = streaming
def _produce():
if not self.producer:
# we've been unregistered
return
# some implementations of IProducer (for example, FileSender)
# don't return a deferred.
d = maybeDeferred(self.producer.resumeProducing)
d.addCallback(lambda x: self._reactor.callLater(0.1, _produce))
if not streaming:
self._reactor.callLater(0.0, _produce)
def write(self, byt):
if self.disconnecting:
raise Exception("Writing to disconnecting FakeTransport")
self.buffer = self.buffer + byt
# always actually do the write asynchronously. Some protocols (notably the
# TLSMemoryBIOProtocol) get very confused if a read comes back while they are
# still doing a write. Doing a callLater here breaks the cycle.
if self.autoflush:
self._reactor.callLater(0.0, self.flush)
def writeSequence(self, seq):
for x in seq:
self.write(x)
def flush(self, maxbytes=None):
if not self.buffer:
# nothing to do. Don't write empty buffers: it upsets the
# TLSMemoryBIOProtocol
return
if self.disconnected:
return
if maxbytes is not None:
to_write = self.buffer[:maxbytes]
else:
to_write = self.buffer
logger.info("%s->%s: %s", self._protocol, self.other, to_write)
try:
self.other.dataReceived(to_write)
except Exception as e:
logger.exception("Exception writing to protocol: %s", e)
return
self.buffer = self.buffer[len(to_write) :]
if self.buffer and self.autoflush:
self._reactor.callLater(0.0, self.flush)
if not self.buffer and self.disconnecting:
logger.info("FakeTransport: Buffer now empty, completing disconnect")
self.disconnected = True
def connect_client(
reactor: ThreadedMemoryReactorClock, client_id: int
) -> Tuple[IProtocol, AccumulatingProtocol]:
"""
Connect a client to a fake TCP transport.
Args:
reactor
factory: The connecting factory to build.
"""
factory = reactor.tcpClients.pop(client_id)[2]
client = factory.buildProtocol(None)
server = AccumulatingProtocol()
server.makeConnection(FakeTransport(client, reactor))
client.makeConnection(FakeTransport(server, reactor))
return client, server
class TestHomeServer(HomeServer):
DATASTORE_CLASS = DataStore
def setup_test_homeserver(
cleanup_func,
name="test",
config=None,
reactor=None,
homeserver_to_use: Type[HomeServer] = TestHomeServer,
**kwargs,
):
"""
Setup a homeserver suitable for running tests against. Keyword arguments
are passed to the Homeserver constructor.
If no datastore is supplied, one is created and given to the homeserver.
Args:
cleanup_func : The function used to register a cleanup routine for
after the test.
Calling this method directly is deprecated: you should instead derive from
HomeserverTestCase.
"""
if reactor is None:
from twisted.internet import reactor
if config is None:
config = default_config(name, parse=True)
config.ldap_enabled = False
if "clock" not in kwargs:
kwargs["clock"] = MockClock()
if USE_POSTGRES_FOR_TESTS:
test_db = "synapse_test_%s" % uuid.uuid4().hex
database_config = {
"name": "psycopg2",
"args": {
"database": test_db,
"host": POSTGRES_HOST,
"password": POSTGRES_PASSWORD,
"user": POSTGRES_USER,
"port": POSTGRES_PORT,
"cp_min": 1,
"cp_max": 5,
},
}
else:
if SQLITE_PERSIST_DB:
# The current working directory is in _trial_temp, so this gets created within that directory.
test_db_location = os.path.abspath("test.db")
logger.debug("Will persist db to %s", test_db_location)
# Ensure each test gets a clean database.
try:
os.remove(test_db_location)
except FileNotFoundError:
pass
else:
logger.debug("Removed existing DB at %s", test_db_location)
else:
test_db_location = ":memory:"
database_config = {
"name": "sqlite3",
"args": {"database": test_db_location, "cp_min": 1, "cp_max": 1},
}
if "db_txn_limit" in kwargs:
database_config["txn_limit"] = kwargs["db_txn_limit"]
database = DatabaseConnectionConfig("master", database_config)
config.database.databases = [database]
db_engine = create_engine(database.config)
# Create the database before we actually try and connect to it, based off
# the template database we generate in setupdb()
if isinstance(db_engine, PostgresEngine):
db_conn = db_engine.module.connect(
database=POSTGRES_BASE_DB,
user=POSTGRES_USER,
host=POSTGRES_HOST,
port=POSTGRES_PORT,
password=POSTGRES_PASSWORD,
)
db_conn.autocommit = True
cur = db_conn.cursor()
cur.execute("DROP DATABASE IF EXISTS %s;" % (test_db,))
cur.execute(
"CREATE DATABASE %s WITH TEMPLATE %s;" % (test_db, POSTGRES_BASE_DB)
)
cur.close()
db_conn.close()
hs = homeserver_to_use(
name,
config=config,
version_string="Synapse/tests",
reactor=reactor,
)
# Install @cache_in_self attributes
for key, val in kwargs.items():
setattr(hs, "_" + key, val)
# Mock TLS
hs.tls_server_context_factory = Mock()
hs.tls_client_options_factory = Mock()
hs.setup()
if homeserver_to_use == TestHomeServer:
hs.setup_background_tasks()
if isinstance(db_engine, PostgresEngine):
database = hs.get_datastores().databases[0]
# We need to do cleanup on PostgreSQL
def cleanup():
import psycopg2
# Close all the db pools
database._db_pool.close()
dropped = False
# Drop the test database
db_conn = db_engine.module.connect(
database=POSTGRES_BASE_DB,
user=POSTGRES_USER,
host=POSTGRES_HOST,
port=POSTGRES_PORT,
password=POSTGRES_PASSWORD,
)
db_conn.autocommit = True
cur = db_conn.cursor()
# Try a few times to drop the DB. Some things may hold on to the
# database for a few more seconds due to flakiness, preventing
# us from dropping it when the test is over. If we can't drop
# it, warn and move on.
for _ in range(5):
try:
cur.execute("DROP DATABASE IF EXISTS %s;" % (test_db,))
db_conn.commit()
dropped = True
except psycopg2.OperationalError as e:
warnings.warn(
"Couldn't drop old db: " + str(e), category=UserWarning
)
time.sleep(0.5)
cur.close()
db_conn.close()
if not dropped:
warnings.warn("Failed to drop old DB.", category=UserWarning)
if not LEAVE_DB:
# Register the cleanup hook
cleanup_func(cleanup)
# bcrypt is far too slow to be doing in unit tests
# Need to let the HS build an auth handler and then mess with it
# because AuthHandler's constructor requires the HS, so we can't make one
# beforehand and pass it in to the HS's constructor (chicken / egg)
async def hash(p):
return hashlib.md5(p.encode("utf8")).hexdigest()
hs.get_auth_handler().hash = hash
async def validate_hash(p, h):
return hashlib.md5(p.encode("utf8")).hexdigest() == h
hs.get_auth_handler().validate_hash = validate_hash
# Make the threadpool and database transactions synchronous for testing.
_make_test_homeserver_synchronous(hs)
return hs
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