MatrixSynapse/tests/rest/media/v1/test_media_storage.py

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# Copyright 2018-2021 The Matrix.org Foundation C.I.C.
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#
# 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.
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import os
import shutil
import tempfile
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from binascii import unhexlify
from io import BytesIO
from typing import Optional
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from unittest.mock import Mock
from urllib import parse
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import attr
from parameterized import parameterized, parameterized_class
from PIL import Image as Image
from twisted.internet import defer
from twisted.internet.defer import Deferred
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from synapse.events.spamcheck import load_legacy_spam_checkers
from synapse.logging.context import make_deferred_yieldable
from synapse.rest import admin
from synapse.rest.client import login
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from synapse.rest.media.v1._base import FileInfo
from synapse.rest.media.v1.filepath import MediaFilePaths
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from synapse.rest.media.v1.media_storage import MediaStorage
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from synapse.rest.media.v1.storage_provider import FileStorageProviderBackend
from tests import unittest
from tests.server import FakeSite, make_request
from tests.test_utils import SMALL_PNG
from tests.utils import default_config
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class MediaStorageTests(unittest.HomeserverTestCase):
needs_threadpool = True
def prepare(self, reactor, clock, hs):
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self.test_dir = tempfile.mkdtemp(prefix="synapse-tests-")
self.addCleanup(shutil.rmtree, self.test_dir)
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self.primary_base_path = os.path.join(self.test_dir, "primary")
self.secondary_base_path = os.path.join(self.test_dir, "secondary")
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)
self.media_storage = MediaStorage(
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hs, self.primary_base_path, self.filepaths, storage_providers
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)
def test_ensure_media_is_in_local_cache(self):
media_id = "some_media_id"
test_body = "Test\n"
# First we create a file that is in a storage provider but not in the
# local primary media store
rel_path = self.filepaths.local_media_filepath_rel(media_id)
secondary_path = os.path.join(self.secondary_base_path, rel_path)
os.makedirs(os.path.dirname(secondary_path))
with open(secondary_path, "w") as f:
f.write(test_body)
# Now we run ensure_media_is_in_local_cache, which should copy the file
# to the local cache.
file_info = FileInfo(None, media_id)
# This uses a real blocking threadpool so we have to wait for it to be
# actually done :/
x = defer.ensureDeferred(
self.media_storage.ensure_media_is_in_local_cache(file_info)
)
# Hotloop until the threadpool does its job...
self.wait_on_thread(x)
local_path = self.get_success(x)
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self.assertTrue(os.path.exists(local_path))
# Asserts the file is under the expected local cache directory
self.assertEqual(
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os.path.commonprefix([self.primary_base_path, local_path]),
self.primary_base_path,
)
with open(local_path) as f:
body = f.read()
self.assertEqual(test_body, body)
@attr.s(slots=True, frozen=True)
class _TestImage:
"""An image for testing thumbnailing with the expected results
Attributes:
data: The raw image to thumbnail
content_type: The type of the image as a content type, e.g. "image/png"
extension: The extension associated with the format, e.g. ".png"
expected_cropped: The expected bytes from cropped thumbnailing, or None if
test should just check for success.
expected_scaled: The expected bytes from scaled thumbnailing, or None if
test should just check for a valid image returned.
expected_found: True if the file should exist on the server, or False if
a 404 is expected.
"""
data = attr.ib(type=bytes)
content_type = attr.ib(type=bytes)
extension = attr.ib(type=bytes)
expected_cropped = attr.ib(type=Optional[bytes], default=None)
expected_scaled = attr.ib(type=Optional[bytes], default=None)
expected_found = attr.ib(default=True, type=bool)
@parameterized_class(
("test_image",),
[
# smoll png
(
_TestImage(
SMALL_PNG,
b"image/png",
b".png",
unhexlify(
b"89504e470d0a1a0a0000000d4948445200000020000000200806"
b"000000737a7af40000001a49444154789cedc101010000008220"
b"ffaf6e484001000000ef0610200001194334ee0000000049454e"
b"44ae426082"
),
unhexlify(
b"89504e470d0a1a0a0000000d4948445200000001000000010806"
b"0000001f15c4890000000d49444154789c636060606000000005"
b"0001a5f645400000000049454e44ae426082"
),
),
),
# small png with transparency.
(
_TestImage(
unhexlify(
b"89504e470d0a1a0a0000000d49484452000000010000000101000"
b"00000376ef9240000000274524e5300010194fdae0000000a4944"
b"4154789c636800000082008177cd72b60000000049454e44ae426"
b"082"
),
b"image/png",
b".png",
# Note that we don't check the output since it varies across
# different versions of Pillow.
),
),
# small lossless webp
(
_TestImage(
unhexlify(
b"524946461a000000574542505650384c0d0000002f0000001007"
b"1011118888fe0700"
),
b"image/webp",
b".webp",
),
),
# an empty file
(
_TestImage(
b"",
b"image/gif",
b".gif",
expected_found=False,
),
),
],
)
class MediaRepoTests(unittest.HomeserverTestCase):
hijack_auth = True
user_id = "@test:user"
def make_homeserver(self, reactor, clock):
self.fetches = []
def get_file(destination, path, output_stream, args=None, max_size=None):
"""
Returns tuple[int,dict,str,int] of file length, response headers,
absolute URI, and response code.
"""
def write_to(r):
data, response = r
output_stream.write(data)
return response
d = Deferred()
d.addCallback(write_to)
self.fetches.append((d, destination, path, args))
return make_deferred_yieldable(d)
client = Mock()
client.get_file = get_file
self.storage_path = self.mktemp()
self.media_store_path = self.mktemp()
os.mkdir(self.storage_path)
os.mkdir(self.media_store_path)
config = self.default_config()
config["media_store_path"] = self.media_store_path
config["max_image_pixels"] = 2000000
provider_config = {
"module": "synapse.rest.media.v1.storage_provider.FileStorageProviderBackend",
"store_local": True,
"store_synchronous": False,
"store_remote": True,
"config": {"directory": self.storage_path},
}
config["media_storage_providers"] = [provider_config]
hs = self.setup_test_homeserver(config=config, federation_http_client=client)
return hs
def prepare(self, reactor, clock, hs):
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media_resource = hs.get_media_repository_resource()
self.download_resource = media_resource.children[b"download"]
self.thumbnail_resource = media_resource.children[b"thumbnail"]
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"
def _req(self, content_disposition, include_content_type=True):
channel = make_request(
self.reactor,
FakeSite(self.download_resource, self.reactor),
"GET",
self.media_id,
shorthand=False,
await_result=False,
)
self.pump()
# We've made one fetch, to example.com, using the media URL, and asking
# the other server not to do a remote fetch
self.assertEqual(len(self.fetches), 1)
self.assertEqual(self.fetches[0][1], "example.com")
self.assertEqual(
self.fetches[0][2], "/_matrix/media/r0/download/" + self.media_id
)
self.assertEqual(self.fetches[0][3], {"allow_remote": "false"})
headers = {
b"Content-Length": [b"%d" % (len(self.test_image.data))],
}
if include_content_type:
headers[b"Content-Type"] = [self.test_image.content_type]
if content_disposition:
headers[b"Content-Disposition"] = [content_disposition]
self.fetches[0][0].callback(
(self.test_image.data, (len(self.test_image.data), headers))
)
self.pump()
self.assertEqual(channel.code, 200)
return channel
def test_handle_missing_content_type(self):
channel = self._req(
b"inline; filename=out" + self.test_image.extension,
include_content_type=False,
)
headers = channel.headers
self.assertEqual(channel.code, 200)
self.assertEqual(
headers.getRawHeaders(b"Content-Type"), [b"application/octet-stream"]
)
def test_disposition_filename_ascii(self):
"""
If the filename is filename=<ascii> then Synapse will decode it as an
ASCII string, and use filename= in the response.
"""
channel = self._req(b"inline; filename=out" + self.test_image.extension)
headers = channel.headers
self.assertEqual(
headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
)
self.assertEqual(
headers.getRawHeaders(b"Content-Disposition"),
[b"inline; filename=out" + self.test_image.extension],
)
def test_disposition_filenamestar_utf8escaped(self):
"""
If the filename is filename=*utf8''<utf8 escaped> then Synapse will
correctly decode it as the UTF-8 string, and use filename* in the
response.
"""
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filename = parse.quote("\u2603".encode()).encode("ascii")
channel = self._req(
b"inline; filename*=utf-8''" + filename + self.test_image.extension
)
headers = channel.headers
self.assertEqual(
headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
)
self.assertEqual(
headers.getRawHeaders(b"Content-Disposition"),
[b"inline; filename*=utf-8''" + filename + self.test_image.extension],
)
def test_disposition_none(self):
"""
If there is no filename, one isn't passed on in the Content-Disposition
of the request.
"""
channel = self._req(None)
headers = channel.headers
self.assertEqual(
headers.getRawHeaders(b"Content-Type"), [self.test_image.content_type]
)
self.assertEqual(headers.getRawHeaders(b"Content-Disposition"), None)
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def test_thumbnail_crop(self):
"""Test that a cropped remote thumbnail is available."""
self._test_thumbnail(
"crop", self.test_image.expected_cropped, self.test_image.expected_found
)
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def test_thumbnail_scale(self):
"""Test that a scaled remote thumbnail is available."""
self._test_thumbnail(
"scale", self.test_image.expected_scaled, self.test_image.expected_found
)
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def test_invalid_type(self):
"""An invalid thumbnail type is never available."""
self._test_thumbnail("invalid", None, False)
@unittest.override_config(
{"thumbnail_sizes": [{"width": 32, "height": 32, "method": "scale"}]}
)
def test_no_thumbnail_crop(self):
"""
Override the config to generate only scaled thumbnails, but request a cropped one.
"""
self._test_thumbnail("crop", None, False)
@unittest.override_config(
{"thumbnail_sizes": [{"width": 32, "height": 32, "method": "crop"}]}
)
def test_no_thumbnail_scale(self):
"""
Override the config to generate only cropped thumbnails, but request a scaled one.
"""
self._test_thumbnail("scale", None, False)
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def test_thumbnail_repeated_thumbnail(self):
"""Test that fetching the same thumbnail works, and deleting the on disk
thumbnail regenerates it.
"""
self._test_thumbnail(
"scale", self.test_image.expected_scaled, self.test_image.expected_found
)
if not self.test_image.expected_found:
return
# Fetching again should work, without re-requesting the image from the
# remote.
params = "?width=32&height=32&method=scale"
channel = make_request(
self.reactor,
FakeSite(self.thumbnail_resource, self.reactor),
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"GET",
self.media_id + params,
shorthand=False,
await_result=False,
)
self.pump()
self.assertEqual(channel.code, 200)
if self.test_image.expected_scaled:
self.assertEqual(
channel.result["body"],
self.test_image.expected_scaled,
channel.result["body"],
)
# Deleting the thumbnail on disk then re-requesting it should work as
# Synapse should regenerate missing thumbnails.
origin, media_id = self.media_id.split("/")
info = self.get_success(self.store.get_cached_remote_media(origin, media_id))
file_id = info["filesystem_id"]
thumbnail_dir = self.media_repo.filepaths.remote_media_thumbnail_dir(
origin, file_id
)
shutil.rmtree(thumbnail_dir, ignore_errors=True)
channel = make_request(
self.reactor,
FakeSite(self.thumbnail_resource, self.reactor),
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"GET",
self.media_id + params,
shorthand=False,
await_result=False,
)
self.pump()
self.assertEqual(channel.code, 200)
if self.test_image.expected_scaled:
self.assertEqual(
channel.result["body"],
self.test_image.expected_scaled,
channel.result["body"],
)
def _test_thumbnail(self, method, expected_body, expected_found):
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params = "?width=32&height=32&method=" + method
channel = make_request(
self.reactor,
FakeSite(self.thumbnail_resource, self.reactor),
"GET",
self.media_id + params,
shorthand=False,
await_result=False,
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)
self.pump()
headers = {
b"Content-Length": [b"%d" % (len(self.test_image.data))],
b"Content-Type": [self.test_image.content_type],
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}
self.fetches[0][0].callback(
(self.test_image.data, (len(self.test_image.data), headers))
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)
self.pump()
if expected_found:
self.assertEqual(channel.code, 200)
if expected_body is not None:
self.assertEqual(
channel.result["body"], expected_body, channel.result["body"]
)
else:
# ensure that the result is at least some valid image
Image.open(BytesIO(channel.result["body"]))
else:
# A 404 with a JSON body.
self.assertEqual(channel.code, 404)
self.assertEqual(
channel.json_body,
{
"errcode": "M_NOT_FOUND",
"error": "Not found [b'example.com', b'12345']",
},
)
@parameterized.expand([("crop", 16), ("crop", 64), ("scale", 16), ("scale", 64)])
def test_same_quality(self, method, desired_size):
"""Test that choosing between thumbnails with the same quality rating succeeds.
We are not particular about which thumbnail is chosen."""
self.assertIsNotNone(
self.thumbnail_resource._select_thumbnail(
desired_width=desired_size,
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):
"""
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"],
)
class TestSpamChecker:
"""A spam checker module that rejects all media that includes the bytes
`evil`.
"""
def __init__(self, config, api):
self.config = config
self.api = api
def parse_config(config):
return config
async def check_event_for_spam(self, foo):
return False # allow all events
async def user_may_invite(self, inviter_userid, invitee_userid, room_id):
return True # allow all invites
async def user_may_create_room(self, userid):
return True # allow all room creations
async def user_may_create_room_alias(self, userid, room_alias):
return True # allow all room aliases
async def user_may_publish_room(self, userid, room_id):
return True # allow publishing of all rooms
async def check_media_file_for_spam(self, file_wrapper, file_info) -> 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, clock, hs):
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):
config = default_config("test")
config.update(
{
"spam_checker": [
{
"module": TestSpamChecker.__module__ + ".TestSpamChecker",
"config": {},
}
]
}
)
return config
def test_upload_innocent(self):
"""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):
"""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
)