# 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_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, "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, 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, 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