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# Copyright 2023 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 os
from twisted.test.proto_helpers import MemoryReactor
from synapse.server import HomeServer
from synapse.util import Clock
from tests import unittest
from tests.unittest import override_config
try:
import lxml
except ImportError:
lxml = None # type: ignore[assignment]
class URLPreviewTests(unittest.HomeserverTestCase):
if not lxml:
skip = "url preview feature requires lxml"
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
config = self.default_config()
config["url_preview_enabled"] = True
config["max_spider_size"] = 9999999
config["url_preview_ip_range_blacklist"] = (
"192.168.1.1",
"1.0.0.0/8",
"3fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
"2001:800::/21",
)
self.storage_path = self.mktemp()
self.media_store_path = self.mktemp()
os.mkdir(self.storage_path)
os.mkdir(self.media_store_path)
config["media_store_path"] = self.media_store_path
provider_config = {
"module": "synapse.media.storage_provider.FileStorageProviderBackend",
"store_local": True,
"store_synchronous": False,
"store_remote": True,
"config": {"directory": self.storage_path},
}
config["media_storage_providers"] = [provider_config]
return self.setup_test_homeserver(config=config)
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
media_repo_resource = hs.get_media_repository_resource()
preview_url = media_repo_resource.children[b"preview_url"]
self.url_previewer = preview_url._url_previewer
def test_all_urls_allowed(self) -> None:
self.assertFalse(self.url_previewer._is_url_blocked("http://matrix.org"))
self.assertFalse(self.url_previewer._is_url_blocked("https://matrix.org"))
self.assertFalse(self.url_previewer._is_url_blocked("http://localhost:8000"))
self.assertFalse(
self.url_previewer._is_url_blocked("http://user:pass@matrix.org")
)
@override_config(
{
"url_preview_url_blacklist": [
{"username": "user"},
{"scheme": "http", "netloc": "matrix.org"},
]
}
)
def test_blocked_url(self) -> None:
# Blocked via scheme and URL.
self.assertTrue(self.url_previewer._is_url_blocked("http://matrix.org"))
# Not blocked because all components must match.
self.assertFalse(self.url_previewer._is_url_blocked("https://matrix.org"))
# Blocked due to the user.
self.assertTrue(
self.url_previewer._is_url_blocked("http://user:pass@example.com")
)
self.assertTrue(self.url_previewer._is_url_blocked("http://user@example.com"))
@override_config({"url_preview_url_blacklist": [{"netloc": "*.example.com"}]})
def test_glob_blocked_url(self) -> None:
# All subdomains are blocked.
self.assertTrue(self.url_previewer._is_url_blocked("http://foo.example.com"))
self.assertTrue(self.url_previewer._is_url_blocked("http://.example.com"))
# The TLD is not blocked.
self.assertFalse(self.url_previewer._is_url_blocked("https://example.com"))
@override_config({"url_preview_url_blacklist": [{"netloc": "^.+\\.example\\.com"}]})
def test_regex_blocked_urL(self) -> None:
# All subdomains are blocked.
self.assertTrue(self.url_previewer._is_url_blocked("http://foo.example.com"))
# Requires a non-empty subdomain.
self.assertFalse(self.url_previewer._is_url_blocked("http://.example.com"))
# The TLD is not blocked.
self.assertFalse(self.url_previewer._is_url_blocked("https://example.com"))
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