564 lines
22 KiB
Python
564 lines
22 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
|
|
# Copyright 2020-2021 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 typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple
|
|
|
|
from synapse.api.errors import Codes, SynapseError, cs_error
|
|
from synapse.config.repository import THUMBNAIL_SUPPORTED_MEDIA_FORMAT_MAP
|
|
from synapse.http.server import (
|
|
DirectServeJsonResource,
|
|
respond_with_json,
|
|
set_corp_headers,
|
|
set_cors_headers,
|
|
)
|
|
from synapse.http.servlet import parse_integer, parse_string
|
|
from synapse.http.site import SynapseRequest
|
|
from synapse.media._base import (
|
|
FileInfo,
|
|
ThumbnailInfo,
|
|
parse_media_id,
|
|
respond_404,
|
|
respond_with_file,
|
|
respond_with_responder,
|
|
)
|
|
from synapse.media.media_storage import MediaStorage
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.media.media_repository import MediaRepository
|
|
from synapse.server import HomeServer
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class ThumbnailResource(DirectServeJsonResource):
|
|
isLeaf = True
|
|
|
|
def __init__(
|
|
self,
|
|
hs: "HomeServer",
|
|
media_repo: "MediaRepository",
|
|
media_storage: MediaStorage,
|
|
):
|
|
super().__init__()
|
|
|
|
self.store = hs.get_datastores().main
|
|
self.media_repo = media_repo
|
|
self.media_storage = media_storage
|
|
self.dynamic_thumbnails = hs.config.media.dynamic_thumbnails
|
|
self._is_mine_server_name = hs.is_mine_server_name
|
|
self.prevent_media_downloads_from = hs.config.media.prevent_media_downloads_from
|
|
|
|
async def _async_render_GET(self, request: SynapseRequest) -> None:
|
|
set_cors_headers(request)
|
|
set_corp_headers(request)
|
|
server_name, media_id, _ = parse_media_id(request)
|
|
width = parse_integer(request, "width", required=True)
|
|
height = parse_integer(request, "height", required=True)
|
|
method = parse_string(request, "method", "scale")
|
|
# TODO Parse the Accept header to get an prioritised list of thumbnail types.
|
|
m_type = "image/png"
|
|
|
|
if self._is_mine_server_name(server_name):
|
|
if self.dynamic_thumbnails:
|
|
await self._select_or_generate_local_thumbnail(
|
|
request, media_id, width, height, method, m_type
|
|
)
|
|
else:
|
|
await self._respond_local_thumbnail(
|
|
request, media_id, width, height, method, m_type
|
|
)
|
|
self.media_repo.mark_recently_accessed(None, media_id)
|
|
else:
|
|
# Don't let users download media from configured domains, even if it
|
|
# is already downloaded. This is Trust & Safety tooling to make some
|
|
# media inaccessible to local users.
|
|
# See `prevent_media_downloads_from` config docs for more info.
|
|
if server_name in self.prevent_media_downloads_from:
|
|
respond_404(request)
|
|
return
|
|
|
|
if self.dynamic_thumbnails:
|
|
await self._select_or_generate_remote_thumbnail(
|
|
request, server_name, media_id, width, height, method, m_type
|
|
)
|
|
else:
|
|
await self._respond_remote_thumbnail(
|
|
request, server_name, media_id, width, height, method, m_type
|
|
)
|
|
self.media_repo.mark_recently_accessed(server_name, media_id)
|
|
|
|
async def _respond_local_thumbnail(
|
|
self,
|
|
request: SynapseRequest,
|
|
media_id: str,
|
|
width: int,
|
|
height: int,
|
|
method: str,
|
|
m_type: str,
|
|
) -> None:
|
|
media_info = await self.store.get_local_media(media_id)
|
|
|
|
if not media_info:
|
|
respond_404(request)
|
|
return
|
|
if media_info["quarantined_by"]:
|
|
logger.info("Media is quarantined")
|
|
respond_404(request)
|
|
return
|
|
|
|
thumbnail_infos = await self.store.get_local_media_thumbnails(media_id)
|
|
await self._select_and_respond_with_thumbnail(
|
|
request,
|
|
width,
|
|
height,
|
|
method,
|
|
m_type,
|
|
thumbnail_infos,
|
|
media_id,
|
|
media_id,
|
|
url_cache=bool(media_info["url_cache"]),
|
|
server_name=None,
|
|
)
|
|
|
|
async def _select_or_generate_local_thumbnail(
|
|
self,
|
|
request: SynapseRequest,
|
|
media_id: str,
|
|
desired_width: int,
|
|
desired_height: int,
|
|
desired_method: str,
|
|
desired_type: str,
|
|
) -> None:
|
|
media_info = await self.store.get_local_media(media_id)
|
|
|
|
if not media_info:
|
|
respond_404(request)
|
|
return
|
|
if media_info["quarantined_by"]:
|
|
logger.info("Media is quarantined")
|
|
respond_404(request)
|
|
return
|
|
|
|
thumbnail_infos = await self.store.get_local_media_thumbnails(media_id)
|
|
for info in thumbnail_infos:
|
|
t_w = info["thumbnail_width"] == desired_width
|
|
t_h = info["thumbnail_height"] == desired_height
|
|
t_method = info["thumbnail_method"] == desired_method
|
|
t_type = info["thumbnail_type"] == desired_type
|
|
|
|
if t_w and t_h and t_method and t_type:
|
|
file_info = FileInfo(
|
|
server_name=None,
|
|
file_id=media_id,
|
|
url_cache=media_info["url_cache"],
|
|
thumbnail=ThumbnailInfo(
|
|
width=info["thumbnail_width"],
|
|
height=info["thumbnail_height"],
|
|
type=info["thumbnail_type"],
|
|
method=info["thumbnail_method"],
|
|
),
|
|
)
|
|
|
|
t_type = file_info.thumbnail_type
|
|
t_length = info["thumbnail_length"]
|
|
|
|
responder = await self.media_storage.fetch_media(file_info)
|
|
if responder:
|
|
await respond_with_responder(request, responder, t_type, t_length)
|
|
return
|
|
|
|
logger.debug("We don't have a thumbnail of that size. Generating")
|
|
|
|
# Okay, so we generate one.
|
|
file_path = await self.media_repo.generate_local_exact_thumbnail(
|
|
media_id,
|
|
desired_width,
|
|
desired_height,
|
|
desired_method,
|
|
desired_type,
|
|
url_cache=bool(media_info["url_cache"]),
|
|
)
|
|
|
|
if file_path:
|
|
await respond_with_file(request, desired_type, file_path)
|
|
else:
|
|
logger.warning("Failed to generate thumbnail")
|
|
raise SynapseError(400, "Failed to generate thumbnail.")
|
|
|
|
async def _select_or_generate_remote_thumbnail(
|
|
self,
|
|
request: SynapseRequest,
|
|
server_name: str,
|
|
media_id: str,
|
|
desired_width: int,
|
|
desired_height: int,
|
|
desired_method: str,
|
|
desired_type: str,
|
|
) -> None:
|
|
media_info = await self.media_repo.get_remote_media_info(server_name, media_id)
|
|
|
|
thumbnail_infos = await self.store.get_remote_media_thumbnails(
|
|
server_name, media_id
|
|
)
|
|
|
|
file_id = media_info["filesystem_id"]
|
|
|
|
for info in thumbnail_infos:
|
|
t_w = info["thumbnail_width"] == desired_width
|
|
t_h = info["thumbnail_height"] == desired_height
|
|
t_method = info["thumbnail_method"] == desired_method
|
|
t_type = info["thumbnail_type"] == desired_type
|
|
|
|
if t_w and t_h and t_method and t_type:
|
|
file_info = FileInfo(
|
|
server_name=server_name,
|
|
file_id=media_info["filesystem_id"],
|
|
thumbnail=ThumbnailInfo(
|
|
width=info["thumbnail_width"],
|
|
height=info["thumbnail_height"],
|
|
type=info["thumbnail_type"],
|
|
method=info["thumbnail_method"],
|
|
),
|
|
)
|
|
|
|
t_type = file_info.thumbnail_type
|
|
t_length = info["thumbnail_length"]
|
|
|
|
responder = await self.media_storage.fetch_media(file_info)
|
|
if responder:
|
|
await respond_with_responder(request, responder, t_type, t_length)
|
|
return
|
|
|
|
logger.debug("We don't have a thumbnail of that size. Generating")
|
|
|
|
# Okay, so we generate one.
|
|
file_path = await self.media_repo.generate_remote_exact_thumbnail(
|
|
server_name,
|
|
file_id,
|
|
media_id,
|
|
desired_width,
|
|
desired_height,
|
|
desired_method,
|
|
desired_type,
|
|
)
|
|
|
|
if file_path:
|
|
await respond_with_file(request, desired_type, file_path)
|
|
else:
|
|
logger.warning("Failed to generate thumbnail")
|
|
raise SynapseError(400, "Failed to generate thumbnail.")
|
|
|
|
async def _respond_remote_thumbnail(
|
|
self,
|
|
request: SynapseRequest,
|
|
server_name: str,
|
|
media_id: str,
|
|
width: int,
|
|
height: int,
|
|
method: str,
|
|
m_type: str,
|
|
) -> None:
|
|
# TODO: Don't download the whole remote file
|
|
# We should proxy the thumbnail from the remote server instead of
|
|
# downloading the remote file and generating our own thumbnails.
|
|
media_info = await self.media_repo.get_remote_media_info(server_name, media_id)
|
|
|
|
thumbnail_infos = await self.store.get_remote_media_thumbnails(
|
|
server_name, media_id
|
|
)
|
|
await self._select_and_respond_with_thumbnail(
|
|
request,
|
|
width,
|
|
height,
|
|
method,
|
|
m_type,
|
|
thumbnail_infos,
|
|
media_id,
|
|
media_info["filesystem_id"],
|
|
url_cache=False,
|
|
server_name=server_name,
|
|
)
|
|
|
|
async def _select_and_respond_with_thumbnail(
|
|
self,
|
|
request: SynapseRequest,
|
|
desired_width: int,
|
|
desired_height: int,
|
|
desired_method: str,
|
|
desired_type: str,
|
|
thumbnail_infos: List[Dict[str, Any]],
|
|
media_id: str,
|
|
file_id: str,
|
|
url_cache: bool,
|
|
server_name: Optional[str] = None,
|
|
) -> None:
|
|
"""
|
|
Respond to a request with an appropriate thumbnail from the previously generated thumbnails.
|
|
|
|
Args:
|
|
request: The incoming request.
|
|
desired_width: The desired width, the returned thumbnail may be larger than this.
|
|
desired_height: The desired height, the returned thumbnail may be larger than this.
|
|
desired_method: The desired method used to generate the thumbnail.
|
|
desired_type: The desired content-type of the thumbnail.
|
|
thumbnail_infos: A list of dictionaries of candidate thumbnails.
|
|
file_id: The ID of the media that a thumbnail is being requested for.
|
|
url_cache: True if this is from a URL cache.
|
|
server_name: The server name, if this is a remote thumbnail.
|
|
"""
|
|
logger.debug(
|
|
"_select_and_respond_with_thumbnail: media_id=%s desired=%sx%s (%s) thumbnail_infos=%s",
|
|
media_id,
|
|
desired_width,
|
|
desired_height,
|
|
desired_method,
|
|
thumbnail_infos,
|
|
)
|
|
|
|
# If `dynamic_thumbnails` is enabled, we expect Synapse to go down a
|
|
# different code path to handle it.
|
|
assert not self.dynamic_thumbnails
|
|
|
|
if thumbnail_infos:
|
|
file_info = self._select_thumbnail(
|
|
desired_width,
|
|
desired_height,
|
|
desired_method,
|
|
desired_type,
|
|
thumbnail_infos,
|
|
file_id,
|
|
url_cache,
|
|
server_name,
|
|
)
|
|
if not file_info:
|
|
logger.info("Couldn't find a thumbnail matching the desired inputs")
|
|
respond_404(request)
|
|
return
|
|
|
|
# The thumbnail property must exist.
|
|
assert file_info.thumbnail is not None
|
|
|
|
responder = await self.media_storage.fetch_media(file_info)
|
|
if responder:
|
|
await respond_with_responder(
|
|
request,
|
|
responder,
|
|
file_info.thumbnail.type,
|
|
file_info.thumbnail.length,
|
|
)
|
|
return
|
|
|
|
# If we can't find the thumbnail we regenerate it. This can happen
|
|
# if e.g. we've deleted the thumbnails but still have the original
|
|
# image somewhere.
|
|
#
|
|
# Since we have an entry for the thumbnail in the DB we a) know we
|
|
# have have successfully generated the thumbnail in the past (so we
|
|
# don't need to worry about repeatedly failing to generate
|
|
# thumbnails), and b) have already calculated that appropriate
|
|
# width/height/method so we can just call the "generate exact"
|
|
# methods.
|
|
|
|
# First let's check that we do actually have the original image
|
|
# still. This will throw a 404 if we don't.
|
|
# TODO: We should refetch the thumbnails for remote media.
|
|
await self.media_storage.ensure_media_is_in_local_cache(
|
|
FileInfo(server_name, file_id, url_cache=url_cache)
|
|
)
|
|
|
|
if server_name:
|
|
await self.media_repo.generate_remote_exact_thumbnail(
|
|
server_name,
|
|
file_id=file_id,
|
|
media_id=media_id,
|
|
t_width=file_info.thumbnail.width,
|
|
t_height=file_info.thumbnail.height,
|
|
t_method=file_info.thumbnail.method,
|
|
t_type=file_info.thumbnail.type,
|
|
)
|
|
else:
|
|
await self.media_repo.generate_local_exact_thumbnail(
|
|
media_id=media_id,
|
|
t_width=file_info.thumbnail.width,
|
|
t_height=file_info.thumbnail.height,
|
|
t_method=file_info.thumbnail.method,
|
|
t_type=file_info.thumbnail.type,
|
|
url_cache=url_cache,
|
|
)
|
|
|
|
responder = await self.media_storage.fetch_media(file_info)
|
|
await respond_with_responder(
|
|
request,
|
|
responder,
|
|
file_info.thumbnail.type,
|
|
file_info.thumbnail.length,
|
|
)
|
|
else:
|
|
# This might be because:
|
|
# 1. We can't create thumbnails for the given media (corrupted or
|
|
# unsupported file type), or
|
|
# 2. The thumbnailing process never ran or errored out initially
|
|
# when the media was first uploaded (these bugs should be
|
|
# reported and fixed).
|
|
# Note that we don't attempt to generate a thumbnail now because
|
|
# `dynamic_thumbnails` is disabled.
|
|
logger.info("Failed to find any generated thumbnails")
|
|
|
|
respond_with_json(
|
|
request,
|
|
400,
|
|
cs_error(
|
|
"Cannot find any thumbnails for the requested media (%r). This might mean the media is not a supported_media_format=(%s) or that thumbnailing failed for some other reason. (Dynamic thumbnails are disabled on this server.)"
|
|
% (
|
|
request.postpath,
|
|
", ".join(THUMBNAIL_SUPPORTED_MEDIA_FORMAT_MAP.keys()),
|
|
),
|
|
code=Codes.UNKNOWN,
|
|
),
|
|
send_cors=True,
|
|
)
|
|
|
|
def _select_thumbnail(
|
|
self,
|
|
desired_width: int,
|
|
desired_height: int,
|
|
desired_method: str,
|
|
desired_type: str,
|
|
thumbnail_infos: List[Dict[str, Any]],
|
|
file_id: str,
|
|
url_cache: bool,
|
|
server_name: Optional[str],
|
|
) -> Optional[FileInfo]:
|
|
"""
|
|
Choose an appropriate thumbnail from the previously generated thumbnails.
|
|
|
|
Args:
|
|
desired_width: The desired width, the returned thumbnail may be larger than this.
|
|
desired_height: The desired height, the returned thumbnail may be larger than this.
|
|
desired_method: The desired method used to generate the thumbnail.
|
|
desired_type: The desired content-type of the thumbnail.
|
|
thumbnail_infos: A list of dictionaries of candidate thumbnails.
|
|
file_id: The ID of the media that a thumbnail is being requested for.
|
|
url_cache: True if this is from a URL cache.
|
|
server_name: The server name, if this is a remote thumbnail.
|
|
|
|
Returns:
|
|
The thumbnail which best matches the desired parameters.
|
|
"""
|
|
desired_method = desired_method.lower()
|
|
|
|
# The chosen thumbnail.
|
|
thumbnail_info = None
|
|
|
|
d_w = desired_width
|
|
d_h = desired_height
|
|
|
|
if desired_method == "crop":
|
|
# Thumbnails that match equal or larger sizes of desired width/height.
|
|
crop_info_list: List[Tuple[int, int, int, bool, int, Dict[str, Any]]] = []
|
|
# Other thumbnails.
|
|
crop_info_list2: List[Tuple[int, int, int, bool, int, Dict[str, Any]]] = []
|
|
for info in thumbnail_infos:
|
|
# Skip thumbnails generated with different methods.
|
|
if info["thumbnail_method"] != "crop":
|
|
continue
|
|
|
|
t_w = info["thumbnail_width"]
|
|
t_h = info["thumbnail_height"]
|
|
aspect_quality = abs(d_w * t_h - d_h * t_w)
|
|
min_quality = 0 if d_w <= t_w and d_h <= t_h else 1
|
|
size_quality = abs((d_w - t_w) * (d_h - t_h))
|
|
type_quality = desired_type != info["thumbnail_type"]
|
|
length_quality = info["thumbnail_length"]
|
|
if t_w >= d_w or t_h >= d_h:
|
|
crop_info_list.append(
|
|
(
|
|
aspect_quality,
|
|
min_quality,
|
|
size_quality,
|
|
type_quality,
|
|
length_quality,
|
|
info,
|
|
)
|
|
)
|
|
else:
|
|
crop_info_list2.append(
|
|
(
|
|
aspect_quality,
|
|
min_quality,
|
|
size_quality,
|
|
type_quality,
|
|
length_quality,
|
|
info,
|
|
)
|
|
)
|
|
# Pick the most appropriate thumbnail. Some values of `desired_width` and
|
|
# `desired_height` may result in a tie, in which case we avoid comparing on
|
|
# the thumbnail info dictionary and pick the thumbnail that appears earlier
|
|
# in the list of candidates.
|
|
if crop_info_list:
|
|
thumbnail_info = min(crop_info_list, key=lambda t: t[:-1])[-1]
|
|
elif crop_info_list2:
|
|
thumbnail_info = min(crop_info_list2, key=lambda t: t[:-1])[-1]
|
|
elif desired_method == "scale":
|
|
# Thumbnails that match equal or larger sizes of desired width/height.
|
|
info_list: List[Tuple[int, bool, int, Dict[str, Any]]] = []
|
|
# Other thumbnails.
|
|
info_list2: List[Tuple[int, bool, int, Dict[str, Any]]] = []
|
|
|
|
for info in thumbnail_infos:
|
|
# Skip thumbnails generated with different methods.
|
|
if info["thumbnail_method"] != "scale":
|
|
continue
|
|
|
|
t_w = info["thumbnail_width"]
|
|
t_h = info["thumbnail_height"]
|
|
size_quality = abs((d_w - t_w) * (d_h - t_h))
|
|
type_quality = desired_type != info["thumbnail_type"]
|
|
length_quality = info["thumbnail_length"]
|
|
if t_w >= d_w or t_h >= d_h:
|
|
info_list.append((size_quality, type_quality, length_quality, info))
|
|
else:
|
|
info_list2.append(
|
|
(size_quality, type_quality, length_quality, info)
|
|
)
|
|
# Pick the most appropriate thumbnail. Some values of `desired_width` and
|
|
# `desired_height` may result in a tie, in which case we avoid comparing on
|
|
# the thumbnail info dictionary and pick the thumbnail that appears earlier
|
|
# in the list of candidates.
|
|
if info_list:
|
|
thumbnail_info = min(info_list, key=lambda t: t[:-1])[-1]
|
|
elif info_list2:
|
|
thumbnail_info = min(info_list2, key=lambda t: t[:-1])[-1]
|
|
|
|
if thumbnail_info:
|
|
return FileInfo(
|
|
file_id=file_id,
|
|
url_cache=url_cache,
|
|
server_name=server_name,
|
|
thumbnail=ThumbnailInfo(
|
|
width=thumbnail_info["thumbnail_width"],
|
|
height=thumbnail_info["thumbnail_height"],
|
|
type=thumbnail_info["thumbnail_type"],
|
|
method=thumbnail_info["thumbnail_method"],
|
|
length=thumbnail_info["thumbnail_length"],
|
|
),
|
|
)
|
|
|
|
# No matching thumbnail was found.
|
|
return None
|