665 lines
23 KiB
Python
665 lines
23 KiB
Python
# Copyright 2018-2021 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import shutil
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import tempfile
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from binascii import unhexlify
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from io import BytesIO
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from typing import Any, BinaryIO, Dict, List, Optional, Union
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from unittest.mock import Mock
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from urllib import parse
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import attr
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from parameterized import parameterized, parameterized_class
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from PIL import Image as Image
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from twisted.internet import defer
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from twisted.internet.defer import Deferred
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from twisted.test.proto_helpers import MemoryReactor
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from synapse.events import EventBase
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from synapse.events.spamcheck import load_legacy_spam_checkers
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from synapse.logging.context import make_deferred_yieldable
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from synapse.module_api import ModuleApi
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from synapse.rest import admin
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from synapse.rest.client import login
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from synapse.rest.media.v1._base import FileInfo
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from synapse.rest.media.v1.filepath import MediaFilePaths
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from synapse.rest.media.v1.media_storage import MediaStorage, ReadableFileWrapper
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from synapse.rest.media.v1.storage_provider import FileStorageProviderBackend
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from synapse.server import HomeServer
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from synapse.types import RoomAlias
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from synapse.util import Clock
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from tests import unittest
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from tests.server import FakeChannel, FakeSite, make_request
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from tests.test_utils import SMALL_PNG
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from tests.utils import default_config
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class MediaStorageTests(unittest.HomeserverTestCase):
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needs_threadpool = True
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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self.test_dir = tempfile.mkdtemp(prefix="synapse-tests-")
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self.addCleanup(shutil.rmtree, self.test_dir)
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self.primary_base_path = os.path.join(self.test_dir, "primary")
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self.secondary_base_path = os.path.join(self.test_dir, "secondary")
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hs.config.media.media_store_path = self.primary_base_path
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storage_providers = [FileStorageProviderBackend(hs, self.secondary_base_path)]
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self.filepaths = MediaFilePaths(self.primary_base_path)
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self.media_storage = MediaStorage(
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hs, self.primary_base_path, self.filepaths, storage_providers
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)
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def test_ensure_media_is_in_local_cache(self) -> None:
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media_id = "some_media_id"
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test_body = "Test\n"
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# First we create a file that is in a storage provider but not in the
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# local primary media store
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rel_path = self.filepaths.local_media_filepath_rel(media_id)
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secondary_path = os.path.join(self.secondary_base_path, rel_path)
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os.makedirs(os.path.dirname(secondary_path))
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with open(secondary_path, "w") as f:
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f.write(test_body)
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# Now we run ensure_media_is_in_local_cache, which should copy the file
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# to the local cache.
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file_info = FileInfo(None, media_id)
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# This uses a real blocking threadpool so we have to wait for it to be
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# actually done :/
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x = defer.ensureDeferred(
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self.media_storage.ensure_media_is_in_local_cache(file_info)
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)
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# Hotloop until the threadpool does its job...
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self.wait_on_thread(x)
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local_path = self.get_success(x)
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self.assertTrue(os.path.exists(local_path))
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# Asserts the file is under the expected local cache directory
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self.assertEqual(
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os.path.commonprefix([self.primary_base_path, local_path]),
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self.primary_base_path,
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)
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with open(local_path) as f:
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body = f.read()
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self.assertEqual(test_body, body)
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@attr.s(auto_attribs=True, slots=True, frozen=True)
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class _TestImage:
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"""An image for testing thumbnailing with the expected results
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Attributes:
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data: The raw image to thumbnail
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content_type: The type of the image as a content type, e.g. "image/png"
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extension: The extension associated with the format, e.g. ".png"
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expected_cropped: The expected bytes from cropped thumbnailing, or None if
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test should just check for success.
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expected_scaled: The expected bytes from scaled thumbnailing, or None if
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test should just check for a valid image returned.
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expected_found: True if the file should exist on the server, or False if
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a 404 is expected.
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"""
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data: bytes
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content_type: bytes
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extension: bytes
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expected_cropped: Optional[bytes] = None
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expected_scaled: Optional[bytes] = None
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expected_found: bool = True
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@parameterized_class(
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("test_image",),
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[
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# small png
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(
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_TestImage(
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SMALL_PNG,
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b"image/png",
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b".png",
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unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000020000000200806"
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b"000000737a7af40000001a49444154789cedc101010000008220"
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b"ffaf6e484001000000ef0610200001194334ee0000000049454e"
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b"44ae426082"
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),
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unhexlify(
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b"89504e470d0a1a0a0000000d4948445200000001000000010806"
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b"0000001f15c4890000000d49444154789c636060606000000005"
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b"0001a5f645400000000049454e44ae426082"
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),
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),
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),
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# small png with transparency.
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(
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_TestImage(
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unhexlify(
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b"89504e470d0a1a0a0000000d49484452000000010000000101000"
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b"00000376ef9240000000274524e5300010194fdae0000000a4944"
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b"4154789c636800000082008177cd72b60000000049454e44ae426"
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b"082"
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),
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b"image/png",
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b".png",
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# Note that we don't check the output since it varies across
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# different versions of Pillow.
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),
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),
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# small lossless webp
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(
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_TestImage(
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unhexlify(
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b"524946461a000000574542505650384c0d0000002f0000001007"
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b"1011118888fe0700"
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),
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b"image/webp",
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b".webp",
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),
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),
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# an empty file
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(
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_TestImage(
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b"",
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b"image/gif",
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b".gif",
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expected_found=False,
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),
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),
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],
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)
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class MediaRepoTests(unittest.HomeserverTestCase):
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hijack_auth = True
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user_id = "@test:user"
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def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
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self.fetches = []
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def get_file(
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destination: str,
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path: str,
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output_stream: BinaryIO,
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args: Optional[Dict[str, Union[str, List[str]]]] = None,
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max_size: Optional[int] = None,
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) -> Deferred:
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"""
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Returns tuple[int,dict,str,int] of file length, response headers,
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absolute URI, and response code.
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"""
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def write_to(r):
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data, response = r
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output_stream.write(data)
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return response
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d = Deferred()
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d.addCallback(write_to)
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self.fetches.append((d, destination, path, args))
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return make_deferred_yieldable(d)
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client = Mock()
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client.get_file = get_file
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self.storage_path = self.mktemp()
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self.media_store_path = self.mktemp()
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os.mkdir(self.storage_path)
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os.mkdir(self.media_store_path)
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config = self.default_config()
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config["media_store_path"] = self.media_store_path
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config["max_image_pixels"] = 2000000
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provider_config = {
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"module": "synapse.rest.media.v1.storage_provider.FileStorageProviderBackend",
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"store_local": True,
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"store_synchronous": False,
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"store_remote": True,
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"config": {"directory": self.storage_path},
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}
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config["media_storage_providers"] = [provider_config]
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hs = self.setup_test_homeserver(config=config, federation_http_client=client)
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return hs
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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media_resource = hs.get_media_repository_resource()
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self.download_resource = media_resource.children[b"download"]
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self.thumbnail_resource = media_resource.children[b"thumbnail"]
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self.store = hs.get_datastores().main
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self.media_repo = hs.get_media_repository()
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self.media_id = "example.com/12345"
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def _req(
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self, content_disposition: Optional[bytes], include_content_type: bool = True
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) -> FakeChannel:
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channel = make_request(
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self.reactor,
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FakeSite(self.download_resource, self.reactor),
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"GET",
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self.media_id,
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shorthand=False,
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await_result=False,
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)
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self.pump()
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# We've made one fetch, to example.com, using the media URL, and asking
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# the other server not to do a remote fetch
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self.assertEqual(len(self.fetches), 1)
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self.assertEqual(self.fetches[0][1], "example.com")
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self.assertEqual(
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self.fetches[0][2], "/_matrix/media/r0/download/" + self.media_id
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)
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self.assertEqual(self.fetches[0][3], {"allow_remote": "false"})
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headers = {
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b"Content-Length": [b"%d" % (len(self.test_image.data))],
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}
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if include_content_type:
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headers[b"Content-Type"] = [self.test_image.content_type]
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if content_disposition:
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headers[b"Content-Disposition"] = [content_disposition]
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self.fetches[0][0].callback(
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(self.test_image.data, (len(self.test_image.data), headers))
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)
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self.pump()
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self.assertEqual(channel.code, 200)
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return channel
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def test_handle_missing_content_type(self) -> None:
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channel = self._req(
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b"inline; filename=out" + self.test_image.extension,
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include_content_type=False,
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)
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headers = channel.headers
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self.assertEqual(channel.code, 200)
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [b"application/octet-stream"]
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)
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def test_disposition_filename_ascii(self) -> None:
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"""
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If the filename is filename=<ascii> then Synapse will decode it as an
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ASCII string, and use filename= in the response.
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"""
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channel = self._req(b"inline; filename=out" + self.test_image.extension)
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headers = channel.headers
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
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)
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self.assertEqual(
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headers.getRawHeaders(b"Content-Disposition"),
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[b"inline; filename=out" + self.test_image.extension],
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)
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def test_disposition_filenamestar_utf8escaped(self) -> None:
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"""
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If the filename is filename=*utf8''<utf8 escaped> then Synapse will
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correctly decode it as the UTF-8 string, and use filename* in the
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response.
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"""
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filename = parse.quote("\u2603".encode()).encode("ascii")
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channel = self._req(
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b"inline; filename*=utf-8''" + filename + self.test_image.extension
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)
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headers = channel.headers
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
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)
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self.assertEqual(
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headers.getRawHeaders(b"Content-Disposition"),
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[b"inline; filename*=utf-8''" + filename + self.test_image.extension],
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)
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def test_disposition_none(self) -> None:
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"""
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If there is no filename, one isn't passed on in the Content-Disposition
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of the request.
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"""
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channel = self._req(None)
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headers = channel.headers
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self.assertEqual(
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headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
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)
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self.assertEqual(headers.getRawHeaders(b"Content-Disposition"), None)
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def test_thumbnail_crop(self) -> None:
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"""Test that a cropped remote thumbnail is available."""
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self._test_thumbnail(
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"crop", self.test_image.expected_cropped, self.test_image.expected_found
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)
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def test_thumbnail_scale(self) -> None:
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"""Test that a scaled remote thumbnail is available."""
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self._test_thumbnail(
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"scale", self.test_image.expected_scaled, self.test_image.expected_found
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)
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def test_invalid_type(self) -> None:
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"""An invalid thumbnail type is never available."""
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self._test_thumbnail("invalid", None, False)
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@unittest.override_config(
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{"thumbnail_sizes": [{"width": 32, "height": 32, "method": "scale"}]}
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)
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def test_no_thumbnail_crop(self) -> None:
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"""
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Override the config to generate only scaled thumbnails, but request a cropped one.
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"""
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self._test_thumbnail("crop", None, False)
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@unittest.override_config(
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{"thumbnail_sizes": [{"width": 32, "height": 32, "method": "crop"}]}
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)
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def test_no_thumbnail_scale(self) -> None:
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"""
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Override the config to generate only cropped thumbnails, but request a scaled one.
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"""
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self._test_thumbnail("scale", None, False)
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def test_thumbnail_repeated_thumbnail(self) -> None:
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"""Test that fetching the same thumbnail works, and deleting the on disk
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thumbnail regenerates it.
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"""
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self._test_thumbnail(
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"scale", self.test_image.expected_scaled, self.test_image.expected_found
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)
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if not self.test_image.expected_found:
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return
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# Fetching again should work, without re-requesting the image from the
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# remote.
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params = "?width=32&height=32&method=scale"
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channel = make_request(
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self.reactor,
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FakeSite(self.thumbnail_resource, self.reactor),
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"GET",
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self.media_id + params,
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shorthand=False,
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await_result=False,
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)
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self.pump()
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self.assertEqual(channel.code, 200)
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if self.test_image.expected_scaled:
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self.assertEqual(
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channel.result["body"],
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self.test_image.expected_scaled,
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channel.result["body"],
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)
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# Deleting the thumbnail on disk then re-requesting it should work as
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# Synapse should regenerate missing thumbnails.
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origin, media_id = self.media_id.split("/")
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info = self.get_success(self.store.get_cached_remote_media(origin, media_id))
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file_id = info["filesystem_id"]
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thumbnail_dir = self.media_repo.filepaths.remote_media_thumbnail_dir(
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origin, file_id
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)
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shutil.rmtree(thumbnail_dir, ignore_errors=True)
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channel = make_request(
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self.reactor,
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FakeSite(self.thumbnail_resource, self.reactor),
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"GET",
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self.media_id + params,
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shorthand=False,
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await_result=False,
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)
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self.pump()
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self.assertEqual(channel.code, 200)
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if self.test_image.expected_scaled:
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self.assertEqual(
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channel.result["body"],
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self.test_image.expected_scaled,
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channel.result["body"],
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)
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def _test_thumbnail(
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self, method: str, expected_body: Optional[bytes], expected_found: bool
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) -> None:
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params = "?width=32&height=32&method=" + method
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channel = make_request(
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self.reactor,
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FakeSite(self.thumbnail_resource, self.reactor),
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"GET",
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self.media_id + params,
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shorthand=False,
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await_result=False,
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)
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self.pump()
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headers = {
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b"Content-Length": [b"%d" % (len(self.test_image.data))],
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b"Content-Type": [self.test_image.content_type],
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}
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self.fetches[0][0].callback(
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(self.test_image.data, (len(self.test_image.data), headers))
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)
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self.pump()
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if expected_found:
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self.assertEqual(channel.code, 200)
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self.assertEqual(
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channel.headers.getRawHeaders(b"Cross-Origin-Resource-Policy"),
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[b"cross-origin"],
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)
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if expected_body is not None:
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self.assertEqual(
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channel.result["body"], expected_body, channel.result["body"]
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)
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else:
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# ensure that the result is at least some valid image
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Image.open(BytesIO(channel.result["body"]))
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else:
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# A 404 with a JSON body.
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self.assertEqual(channel.code, 404)
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self.assertEqual(
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channel.json_body,
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{
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"errcode": "M_NOT_FOUND",
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"error": "Not found [b'example.com', b'12345']",
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},
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)
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@parameterized.expand([("crop", 16), ("crop", 64), ("scale", 16), ("scale", 64)])
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def test_same_quality(self, method: str, desired_size: int) -> None:
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"""Test that choosing between thumbnails with the same quality rating succeeds.
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We are not particular about which thumbnail is chosen."""
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self.assertIsNotNone(
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self.thumbnail_resource._select_thumbnail(
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desired_width=desired_size,
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desired_height=desired_size,
|
|
desired_method=method,
|
|
desired_type=self.test_image.content_type,
|
|
# Provide two identical thumbnails which are guaranteed to have the same
|
|
# quality rating.
|
|
thumbnail_infos=[
|
|
{
|
|
"thumbnail_width": 32,
|
|
"thumbnail_height": 32,
|
|
"thumbnail_method": method,
|
|
"thumbnail_type": self.test_image.content_type,
|
|
"thumbnail_length": 256,
|
|
"filesystem_id": f"thumbnail1{self.test_image.extension}",
|
|
},
|
|
{
|
|
"thumbnail_width": 32,
|
|
"thumbnail_height": 32,
|
|
"thumbnail_method": method,
|
|
"thumbnail_type": self.test_image.content_type,
|
|
"thumbnail_length": 256,
|
|
"filesystem_id": f"thumbnail2{self.test_image.extension}",
|
|
},
|
|
],
|
|
file_id=f"image{self.test_image.extension}",
|
|
url_cache=None,
|
|
server_name=None,
|
|
)
|
|
)
|
|
|
|
def test_x_robots_tag_header(self) -> None:
|
|
"""
|
|
Tests that the `X-Robots-Tag` header is present, which informs web crawlers
|
|
to not index, archive, or follow links in media.
|
|
"""
|
|
channel = self._req(b"inline; filename=out" + self.test_image.extension)
|
|
|
|
headers = channel.headers
|
|
self.assertEqual(
|
|
headers.getRawHeaders(b"X-Robots-Tag"),
|
|
[b"noindex, nofollow, noarchive, noimageindex"],
|
|
)
|
|
|
|
def test_cross_origin_resource_policy_header(self) -> None:
|
|
"""
|
|
Test that the Cross-Origin-Resource-Policy header is set to "cross-origin"
|
|
allowing web clients to embed media from the downloads API.
|
|
"""
|
|
channel = self._req(b"inline; filename=out" + self.test_image.extension)
|
|
|
|
headers = channel.headers
|
|
|
|
self.assertEqual(
|
|
headers.getRawHeaders(b"Cross-Origin-Resource-Policy"),
|
|
[b"cross-origin"],
|
|
)
|
|
|
|
|
|
class TestSpamChecker:
|
|
"""A spam checker module that rejects all media that includes the bytes
|
|
`evil`.
|
|
"""
|
|
|
|
def __init__(self, config: Dict[str, Any], api: ModuleApi) -> None:
|
|
self.config = config
|
|
self.api = api
|
|
|
|
def parse_config(config: Dict[str, Any]) -> Dict[str, Any]:
|
|
return config
|
|
|
|
async def check_event_for_spam(self, event: EventBase) -> Union[bool, str]:
|
|
return False # allow all events
|
|
|
|
async def user_may_invite(
|
|
self,
|
|
inviter_userid: str,
|
|
invitee_userid: str,
|
|
room_id: str,
|
|
) -> bool:
|
|
return True # allow all invites
|
|
|
|
async def user_may_create_room(self, userid: str) -> bool:
|
|
return True # allow all room creations
|
|
|
|
async def user_may_create_room_alias(
|
|
self, userid: str, room_alias: RoomAlias
|
|
) -> bool:
|
|
return True # allow all room aliases
|
|
|
|
async def user_may_publish_room(self, userid: str, room_id: str) -> bool:
|
|
return True # allow publishing of all rooms
|
|
|
|
async def check_media_file_for_spam(
|
|
self, file_wrapper: ReadableFileWrapper, file_info: FileInfo
|
|
) -> bool:
|
|
buf = BytesIO()
|
|
await file_wrapper.write_chunks_to(buf.write)
|
|
|
|
return b"evil" in buf.getvalue()
|
|
|
|
|
|
class SpamCheckerTestCase(unittest.HomeserverTestCase):
|
|
servlets = [
|
|
login.register_servlets,
|
|
admin.register_servlets,
|
|
]
|
|
|
|
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
|
|
self.user = self.register_user("user", "pass")
|
|
self.tok = self.login("user", "pass")
|
|
|
|
# Allow for uploading and downloading to/from the media repo
|
|
self.media_repo = hs.get_media_repository_resource()
|
|
self.download_resource = self.media_repo.children[b"download"]
|
|
self.upload_resource = self.media_repo.children[b"upload"]
|
|
|
|
load_legacy_spam_checkers(hs)
|
|
|
|
def default_config(self) -> Dict[str, Any]:
|
|
config = default_config("test")
|
|
|
|
config.update(
|
|
{
|
|
"spam_checker": [
|
|
{
|
|
"module": TestSpamChecker.__module__ + ".TestSpamChecker",
|
|
"config": {},
|
|
}
|
|
]
|
|
}
|
|
)
|
|
|
|
return config
|
|
|
|
def test_upload_innocent(self) -> None:
|
|
"""Attempt to upload some innocent data that should be allowed."""
|
|
self.helper.upload_media(
|
|
self.upload_resource, SMALL_PNG, tok=self.tok, expect_code=200
|
|
)
|
|
|
|
def test_upload_ban(self) -> None:
|
|
"""Attempt to upload some data that includes bytes "evil", which should
|
|
get rejected by the spam checker.
|
|
"""
|
|
|
|
data = b"Some evil data"
|
|
|
|
self.helper.upload_media(
|
|
self.upload_resource, data, tok=self.tok, expect_code=400
|
|
)
|