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MatrixSynapse/tests/server.py

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import json
import logging
from collections import deque
from io import SEEK_END, BytesIO
from typing import Callable, Dict, Iterable, MutableMapping, Optional, Tuple, Union
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,
IResolverSimple,
ITransport,
)
from twisted.python.failure import Failure
from twisted.test.proto_helpers import AccumulatingProtocol, MemoryReactorClock
from twisted.web.http_headers import Headers
from twisted.web.resource import IResource
from twisted.web.server import Site
from synapse.http.site import SynapseRequest
from synapse.util import Clock
from tests.utils import setup_test_homeserver as _sth
logger = logging.getLogger(__name__)
class TimedOutException(Exception):
"""
A web query timed out.
"""
@attr.s
class FakeChannel:
"""
A fake Twisted Web Channel (the part that interfaces with the
wire).
"""
site = attr.ib(type=Union[Site, "FakeSite"])
_reactor = attr.ib()
result = attr.ib(type=dict, default=attr.Factory(dict))
_ip = attr.ib(type=str, default="127.0.0.1")
_producer: Optional[Union[IPullProducer, IPushProducer]] = 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
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):
"""
Args:
resource: the resource to be used for rendering all requests
"""
self._resource = resource
def getResourceFor(self, request):
return self._resource
def make_request(
reactor,
site: Union[Site, FakeSite],
method,
path,
content=b"",
access_token=None,
request=SynapseRequest,
shorthand=True,
federation_auth_origin=None,
content_is_form=False,
await_result: bool = True,
custom_headers: Optional[
Iterable[Tuple[Union[bytes, str], Union[bytes, str]]]
] = 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:
site: The twisted Site to use to render the request
method (bytes/unicode): The HTTP request method ("verb").
path (bytes/unicode): The HTTP path, suitably URL encoded (e.g.
escaped UTF-8 & spaces and such).
content (bytes or dict): The body of the request. JSON-encoded, if
a dict.
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 (bytes|None): 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.
custom_headers: (name, value) pairs to add as request headers
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.
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)
req.content = BytesIO(content)
# Twisted expects to be at the end of the content when parsing the request.
req.content.seek(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 = {}
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, port, callback):
"""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, port, 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 setup_test_homeserver(cleanup_func, *args, **kwargs):
"""
Set up a synchronous test server, driven by the reactor used by
the homeserver.
"""
server = _sth(cleanup_func, *args, **kwargs)
# Make the thread pool 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
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
return server
def get_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
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