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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import json
from http import HTTPStatus
from io import BytesIO
from typing import Tuple, Union
from unittest.mock import Mock
from synapse.api.errors import Codes, SynapseError
from synapse.http.servlet import (
RestServlet,
parse_json_object_from_request,
parse_json_value_from_request,
)
from synapse.http.site import SynapseRequest
from synapse.rest.client._base import client_patterns
from synapse.server import HomeServer
from synapse.types import JsonDict
from synapse.util.cancellation import cancellable
from tests import unittest
from tests.http.server._base import test_disconnect
def make_request(content: Union[bytes, JsonDict]) -> Mock:
"""Make an object that acts enough like a request."""
request = Mock(spec=["method", "uri", "content"])
if isinstance(content, dict):
content = json.dumps(content).encode("utf8")
request.method = bytes("STUB_METHOD", "ascii")
request.uri = bytes("/test_stub_uri", "ascii")
request.content = BytesIO(content)
return request
class TestServletUtils(unittest.TestCase):
def test_parse_json_value(self) -> None:
"""Basic tests for parse_json_value_from_request."""
# Test round-tripping.
obj = {"foo": 1}
result1 = parse_json_value_from_request(make_request(obj))
self.assertEqual(result1, obj)
# Results don't have to be objects.
result2 = parse_json_value_from_request(make_request(b'["foo"]'))
self.assertEqual(result2, ["foo"])
# Test empty.
with self.assertRaises(SynapseError):
parse_json_value_from_request(make_request(b""))
result3 = parse_json_value_from_request(
make_request(b""), allow_empty_body=True
)
self.assertIsNone(result3)
# Invalid UTF-8.
with self.assertRaises(SynapseError):
parse_json_value_from_request(make_request(b"\xFF\x00"))
# Invalid JSON.
with self.assertRaises(SynapseError):
parse_json_value_from_request(make_request(b"foo"))
with self.assertRaises(SynapseError):
parse_json_value_from_request(make_request(b'{"foo": Infinity}'))
def test_parse_json_object(self) -> None:
"""Basic tests for parse_json_object_from_request."""
# Test empty.
result = parse_json_object_from_request(
make_request(b""), allow_empty_body=True
)
self.assertEqual(result, {})
# Test not an object
with self.assertRaises(SynapseError):
parse_json_object_from_request(make_request(b'["foo"]'))
class CancellableRestServlet(RestServlet):
"""A `RestServlet` with a mix of cancellable and uncancellable handlers."""
PATTERNS = client_patterns("/sleep$")
def __init__(self, hs: HomeServer):
super().__init__()
self.clock = hs.get_clock()
@cancellable
async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
await self.clock.sleep(1.0)
return HTTPStatus.OK, {"result": True}
async def on_POST(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
await self.clock.sleep(1.0)
return HTTPStatus.OK, {"result": True}
class TestRestServletCancellation(unittest.HomeserverTestCase):
"""Tests for `RestServlet` cancellation."""
servlets = [
lambda hs, http_server: CancellableRestServlet(hs).register(http_server)
]
def test_cancellable_disconnect(self) -> None:
"""Test that handlers with the `@cancellable` flag can be cancelled."""
channel = self.make_request("GET", "/sleep", await_result=False)
test_disconnect(
self.reactor,
channel,
expect_cancellation=True,
expected_body={"error": "Request cancelled", "errcode": Codes.UNKNOWN},
)
def test_uncancellable_disconnect(self) -> None:
"""Test that handlers without the `@cancellable` flag cannot be cancelled."""
channel = self.make_request("POST", "/sleep", await_result=False)
test_disconnect(
self.reactor,
channel,
expect_cancellation=False,
expected_body={"result": True},
)
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