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Implementation of HTTP 307 response for MSC3886 POST endpoint (#14018) 

Co-authored-by: reivilibre <olivier@librepush.net>
Co-authored-by: Andrew Morgan <andrewm@element.io>
This commit is contained in:
Hugh Nimmo-Smith 2022-10-18 16:52:25 +01:00 committed by GitHub
parent 844ce47b9b
commit 4eaf3eb840
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GPG Key ID: 4AEE18F83AFDEB23
16 changed files with 257 additions and 45 deletions
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1
changelog.d/14018.feature Normal file
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@ -0,0 +1 @@
Support for redirecting to an implementation of a [MSC3886](https://github.com/matrix-org/matrix-spec-proposals/pull/3886) HTTP rendezvous service.

7
synapse/config/experimental.py
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@ -12,7 +12,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Any
from typing import Any, Optional
import attr
@ -120,3 +120,8 @@ class ExperimentalConfig(Config):
# MSC3874: Filtering /messages with rel_types / not_rel_types.
self.msc3874_enabled: bool = experimental.get("msc3874_enabled", False)
# MSC3886: Simple client rendezvous capability
self.msc3886_endpoint: Optional[str] = experimental.get(
"msc3886_endpoint", None
)

4
synapse/config/server.py
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@ -207,6 +207,9 @@ class HttpListenerConfig:
additional_resources: Dict[str, dict] = attr.Factory(dict)
tag: Optional[str] = None
request_id_header: Optional[str] = None
# If true, the listener will return CORS response headers compatible with MSC3886:
# https://github.com/matrix-org/matrix-spec-proposals/pull/3886
experimental_cors_msc3886: bool = False
@attr.s(slots=True, frozen=True, auto_attribs=True)
@ -935,6 +938,7 @@ def parse_listener_def(num: int, listener: Any) -> ListenerConfig:
additional_resources=listener.get("additional_resources", {}),
tag=listener.get("tag"),
request_id_header=listener.get("request_id_header"),
experimental_cors_msc3886=listener.get("experimental_cors_msc3886", False),
)
return ListenerConfig(port, bind_addresses, listener_type, tls, http_config)

2
synapse/handlers/sso.py
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@ -874,7 +874,7 @@ class SsoHandler:
)
async def handle_terms_accepted(
self, request: Request, session_id: str, terms_version: str
self, request: SynapseRequest, session_id: str, terms_version: str
) -> None:
"""Handle a request to the new-user 'consent' endpoint

48
synapse/http/server.py
View File

@ -19,6 +19,7 @@ import logging
import types
import urllib
from http import HTTPStatus
from http.client import FOUND
from inspect import isawaitable
from typing import (
TYPE_CHECKING,
@ -339,7 +340,7 @@ class _AsyncResource(resource.Resource, metaclass=abc.ABCMeta):
return callback_return
_unrecognised_request_handler(request)
return _unrecognised_request_handler(request)
@abc.abstractmethod
def _send_response(
@ -598,7 +599,7 @@ class RootRedirect(resource.Resource):
class OptionsResource(resource.Resource):
"""Responds to OPTION requests for itself and all children."""
def render_OPTIONS(self, request: Request) -> bytes:
def render_OPTIONS(self, request: SynapseRequest) -> bytes:
request.setResponseCode(204)
request.setHeader(b"Content-Length", b"0")
@ -763,7 +764,7 @@ def respond_with_json(
def respond_with_json_bytes(
request: Request,
request: SynapseRequest,
code: int,
json_bytes: bytes,
send_cors: bool = False,
@ -859,7 +860,7 @@ def _write_bytes_to_request(request: Request, bytes_to_write: bytes) -> None:
_ByteProducer(request, bytes_generator)
def set_cors_headers(request: Request) -> None:
def set_cors_headers(request: SynapseRequest) -> None:
"""Set the CORS headers so that javascript running in a web browsers can
use this API
@ -870,10 +871,20 @@ def set_cors_headers(request: Request) -> None:
request.setHeader(
b"Access-Control-Allow-Methods", b"GET, HEAD, POST, PUT, DELETE, OPTIONS"
)
request.setHeader(
b"Access-Control-Allow-Headers",
b"X-Requested-With, Content-Type, Authorization, Date",
)
if request.experimental_cors_msc3886:
request.setHeader(
b"Access-Control-Allow-Headers",
b"X-Requested-With, Content-Type, Authorization, Date, If-Match, If-None-Match",
)
request.setHeader(
b"Access-Control-Expose-Headers",
b"ETag, Location, X-Max-Bytes",
)
else:
request.setHeader(
b"Access-Control-Allow-Headers",
b"X-Requested-With, Content-Type, Authorization, Date",
)
def set_corp_headers(request: Request) -> None:
@ -942,10 +953,25 @@ def set_clickjacking_protection_headers(request: Request) -> None:
request.setHeader(b"Content-Security-Policy", b"frame-ancestors 'none';")
def respond_with_redirect(request: Request, url: bytes) -> None:
"""Write a 302 response to the request, if it is still alive."""
def respond_with_redirect(
request: SynapseRequest, url: bytes, statusCode: int = FOUND, cors: bool = False
) -> None:
"""
Write a 302 (or other specified status code) response to the request, if it is still alive.
Args:
request: The http request to respond to.
url: The URL to redirect to.
statusCode: The HTTP status code to use for the redirect (defaults to 302).
cors: Whether to set CORS headers on the response.
"""
logger.debug("Redirect to %s", url.decode("utf-8"))
request.redirect(url)
if cors:
set_cors_headers(request)
request.setResponseCode(statusCode)
request.setHeader(b"location", url)
finish_request(request)

3
synapse/http/site.py
View File

@ -82,6 +82,7 @@ class SynapseRequest(Request):
self.reactor = site.reactor
self._channel = channel # this is used by the tests
self.start_time = 0.0
self.experimental_cors_msc3886 = site.experimental_cors_msc3886
# The requester, if authenticated. For federation requests this is the
# server name, for client requests this is the Requester object.
@ -622,6 +623,8 @@ class SynapseSite(Site):
request_id_header = config.http_options.request_id_header
self.experimental_cors_msc3886 = config.http_options.experimental_cors_msc3886
def request_factory(channel: HTTPChannel, queued: bool) -> Request:
return request_class(
channel,

2
synapse/rest/__init__.py
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@ -44,6 +44,7 @@ from synapse.rest.client import (
receipts,
register,
relations,
rendezvous,
report_event,
room,
room_batch,
@ -132,3 +133,4 @@ class ClientRestResource(JsonResource):
# unstable
mutual_rooms.register_servlets(hs, client_resource)
login_token_request.register_servlets(hs, client_resource)
rendezvous.register_servlets(hs, client_resource)

74
synapse/rest/client/rendezvous.py Normal file
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@ -0,0 +1,74 @@
# Copyright 2022 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 logging
from http.client import TEMPORARY_REDIRECT
from typing import TYPE_CHECKING, Optional
from synapse.http.server import HttpServer, respond_with_redirect
from synapse.http.servlet import RestServlet
from synapse.http.site import SynapseRequest
from synapse.rest.client._base import client_patterns
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class RendezvousServlet(RestServlet):
"""
This is a placeholder implementation of [MSC3886](https://github.com/matrix-org/matrix-spec-proposals/pull/3886)
simple client rendezvous capability that is used by the "Sign in with QR" functionality.
This implementation only serves as a 307 redirect to a configured server rather than being a full implementation.
A module that implements the full functionality is available at: https://pypi.org/project/matrix-http-rendezvous-synapse/.
Request:
POST /rendezvous HTTP/1.1
Content-Type: ...
...
Response:
HTTP/1.1 307
Location: <configured endpoint>
"""
PATTERNS = client_patterns(
"/org.matrix.msc3886/rendezvous$", releases=[], v1=False, unstable=True
)
def __init__(self, hs: "HomeServer"):
super().__init__()
redirection_target: Optional[str] = hs.config.experimental.msc3886_endpoint
assert (
redirection_target is not None
), "Servlet is only registered if there is a redirection target"
self.endpoint = redirection_target.encode("utf-8")
async def on_POST(self, request: SynapseRequest) -> None:
respond_with_redirect(
request, self.endpoint, statusCode=TEMPORARY_REDIRECT, cors=True
)
# PUT, GET and DELETE are not implemented as they should be fulfilled by the redirect target.
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
if hs.config.experimental.msc3886_endpoint is not None:
RendezvousServlet(hs).register(http_server)

3
synapse/rest/client/versions.py
View File

@ -116,6 +116,9 @@ class VersionsRestServlet(RestServlet):
"org.matrix.msc3881": self.config.experimental.msc3881_enabled,
# Adds support for filtering /messages by event relation.
"org.matrix.msc3874": self.config.experimental.msc3874_enabled,
# Adds support for simple HTTP rendezvous as per MSC3886
"org.matrix.msc3886": self.config.experimental.msc3886_endpoint
is not None,
},
},
)

4
synapse/rest/key/v2/local_key_resource.py
View File

@ -20,9 +20,9 @@ from signedjson.sign import sign_json
from unpaddedbase64 import encode_base64
from twisted.web.resource import Resource
from twisted.web.server import Request
from synapse.http.server import respond_with_json_bytes
from synapse.http.site import SynapseRequest
from synapse.types import JsonDict
if TYPE_CHECKING:
@ -99,7 +99,7 @@ class LocalKey(Resource):
json_object = sign_json(json_object, self.config.server.server_name, key)
return json_object
def render_GET(self, request: Request) -> Optional[int]:
def render_GET(self, request: SynapseRequest) -> Optional[int]:
time_now = self.clock.time_msec()
# Update the expiry time if less than half the interval remains.
if time_now + self.config.key.key_refresh_interval / 2 > self.valid_until_ts:

3
synapse/rest/synapse/client/new_user_consent.py
View File

@ -20,6 +20,7 @@ from synapse.api.errors import SynapseError
from synapse.handlers.sso import get_username_mapping_session_cookie_from_request
from synapse.http.server import DirectServeHtmlResource, respond_with_html
from synapse.http.servlet import parse_string
from synapse.http.site import SynapseRequest
from synapse.types import UserID
from synapse.util.templates import build_jinja_env
@ -88,7 +89,7 @@ class NewUserConsentResource(DirectServeHtmlResource):
html = template.render(template_params)
respond_with_html(request, 200, html)
async def _async_render_POST(self, request: Request) -> None:
async def _async_render_POST(self, request: SynapseRequest) -> None:
try:
session_id = get_username_mapping_session_cookie_from_request(request)
except SynapseError as e:

3
synapse/rest/well_known.py
View File

@ -18,6 +18,7 @@ from twisted.web.resource import Resource
from twisted.web.server import Request
from synapse.http.server import set_cors_headers
from synapse.http.site import SynapseRequest
from synapse.types import JsonDict
from synapse.util import json_encoder
from synapse.util.stringutils import parse_server_name
@ -63,7 +64,7 @@ class ClientWellKnownResource(Resource):
Resource.__init__(self)
self._well_known_builder = WellKnownBuilder(hs)
def render_GET(self, request: Request) -> bytes:
def render_GET(self, request: SynapseRequest) -> bytes:
set_cors_headers(request)
r = self._well_known_builder.get_well_known()
if not r:

1
tests/logging/test_terse_json.py
View File

@ -153,6 +153,7 @@ class TerseJsonTestCase(LoggerCleanupMixin, TestCase):
site.site_tag = "test-site"
site.server_version_string = "Server v1"
site.reactor = Mock()
site.experimental_cors_msc3886 = False
request = SynapseRequest(FakeChannel(site, None), site)
# Call requestReceived to finish instantiating the object.
request.content = BytesIO()

45
tests/rest/client/test_rendezvous.py Normal file
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@ -0,0 +1,45 @@
# Copyright 2022 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.
from twisted.test.proto_helpers import MemoryReactor
from synapse.rest.client import rendezvous
from synapse.server import HomeServer
from synapse.util import Clock
from tests import unittest
from tests.unittest import override_config
endpoint = "/_matrix/client/unstable/org.matrix.msc3886/rendezvous"
class RendezvousServletTestCase(unittest.HomeserverTestCase):
servlets = [
rendezvous.register_servlets,
]
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
self.hs = self.setup_test_homeserver()
return self.hs
def test_disabled(self) -> None:
channel = self.make_request("POST", endpoint, {}, access_token=None)
self.assertEqual(channel.code, 400)
@override_config({"experimental_features": {"msc3886_endpoint": "/asd"}})
def test_redirect(self) -> None:
channel = self.make_request("POST", endpoint, {}, access_token=None)
self.assertEqual(channel.code, 307)
self.assertEqual(channel.headers.getRawHeaders("Location"), ["/asd"])

8
tests/server.py
View File

@ -266,7 +266,12 @@ class FakeSite:
site_tag = "test"
access_logger = logging.getLogger("synapse.access.http.fake")
def __init__(self, resource: IResource, reactor: IReactorTime):
def __init__(
self,
resource: IResource,
reactor: IReactorTime,
experimental_cors_msc3886: bool = False,
):
"""
Args:
@ -274,6 +279,7 @@ class FakeSite:
"""
self._resource = resource
self.reactor = reactor
self.experimental_cors_msc3886 = experimental_cors_msc3886
def getResourceFor(self, request):
return self._resource

94
tests/test_server.py
View File

@ -222,13 +222,22 @@ class OptionsResourceTests(unittest.TestCase):
self.resource = OptionsResource()
self.resource.putChild(b"res", DummyResource())
def _make_request(self, method: bytes, path: bytes) -> FakeChannel:
def _make_request(
self, method: bytes, path: bytes, experimental_cors_msc3886: bool = False
) -> FakeChannel:
"""Create a request from the method/path and return a channel with the response."""
# Create a site and query for the resource.
site = SynapseSite(
"test",
"site_tag",
parse_listener_def(0, {"type": "http", "port": 0}),
parse_listener_def(
0,
{
"type": "http",
"port": 0,
"experimental_cors_msc3886": experimental_cors_msc3886,
},
),
self.resource,
"1.0",
max_request_body_size=4096,
@ -239,25 +248,58 @@ class OptionsResourceTests(unittest.TestCase):
channel = make_request(self.reactor, site, method, path, shorthand=False)
return channel
def _check_cors_standard_headers(self, channel: FakeChannel) -> None:
# Ensure the correct CORS headers have been added
# as per https://spec.matrix.org/v1.4/client-server-api/#web-browser-clients
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Allow-Origin"),
[b"*"],
"has correct CORS Origin header",
)
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Allow-Methods"),
[b"GET, HEAD, POST, PUT, DELETE, OPTIONS"], # HEAD isn't in the spec
"has correct CORS Methods header",
)
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Allow-Headers"),
[b"X-Requested-With, Content-Type, Authorization, Date"],
"has correct CORS Headers header",
)
def _check_cors_msc3886_headers(self, channel: FakeChannel) -> None:
# Ensure the correct CORS headers have been added
# as per https://github.com/matrix-org/matrix-spec-proposals/blob/hughns/simple-rendezvous-capability/proposals/3886-simple-rendezvous-capability.md#cors
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Allow-Origin"),
[b"*"],
"has correct CORS Origin header",
)
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Allow-Methods"),
[b"GET, HEAD, POST, PUT, DELETE, OPTIONS"], # HEAD isn't in the spec
"has correct CORS Methods header",
)
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Allow-Headers"),
[
b"X-Requested-With, Content-Type, Authorization, Date, If-Match, If-None-Match"
],
"has correct CORS Headers header",
)
self.assertEqual(
channel.headers.getRawHeaders(b"Access-Control-Expose-Headers"),
[b"ETag, Location, X-Max-Bytes"],
"has correct CORS Expose Headers header",
)
def test_unknown_options_request(self) -> None:
"""An OPTIONS requests to an unknown URL still returns 204 No Content."""
channel = self._make_request(b"OPTIONS", b"/foo/")
self.assertEqual(channel.code, 204)
self.assertNotIn("body", channel.result)
# Ensure the correct CORS headers have been added
self.assertTrue(
channel.headers.hasHeader(b"Access-Control-Allow-Origin"),
"has CORS Origin header",
)
self.assertTrue(
channel.headers.hasHeader(b"Access-Control-Allow-Methods"),
"has CORS Methods header",
)
self.assertTrue(
channel.headers.hasHeader(b"Access-Control-Allow-Headers"),
"has CORS Headers header",
)
self._check_cors_standard_headers(channel)
def test_known_options_request(self) -> None:
"""An OPTIONS requests to an known URL still returns 204 No Content."""
@ -265,19 +307,17 @@ class OptionsResourceTests(unittest.TestCase):
self.assertEqual(channel.code, 204)
self.assertNotIn("body", channel.result)
# Ensure the correct CORS headers have been added
self.assertTrue(
channel.headers.hasHeader(b"Access-Control-Allow-Origin"),
"has CORS Origin header",
)
self.assertTrue(
channel.headers.hasHeader(b"Access-Control-Allow-Methods"),
"has CORS Methods header",
)
self.assertTrue(
channel.headers.hasHeader(b"Access-Control-Allow-Headers"),
"has CORS Headers header",
self._check_cors_standard_headers(channel)
def test_known_options_request_msc3886(self) -> None:
"""An OPTIONS requests to an known URL still returns 204 No Content."""
channel = self._make_request(
b"OPTIONS", b"/res/", experimental_cors_msc3886=True
)
self.assertEqual(channel.code, 204)
self.assertNotIn("body", channel.result)
self._check_cors_msc3886_headers(channel)
def test_unknown_request(self) -> None:
"""A non-OPTIONS request to an unknown URL should 404."""