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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2020-2021 The Matrix.org Foundation C.I.C.
# Copyright 2014-2016 OpenMarket Ltd
# 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 logging
import re
from typing import TYPE_CHECKING
from synapse.http.server import set_corp_headers, set_cors_headers
from synapse.http.servlet import RestServlet, parse_integer, parse_string
from synapse.http.site import SynapseRequest
from synapse.media._base import (
DEFAULT_MAX_TIMEOUT_MS,
MAXIMUM_ALLOWED_MAX_TIMEOUT_MS,
respond_404,
)
from synapse.media.media_storage import MediaStorage
from synapse.media.thumbnailer import ThumbnailProvider
from synapse.util.stringutils import parse_and_validate_server_name
if TYPE_CHECKING:
from synapse.media.media_repository import MediaRepository
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class ThumbnailResource(RestServlet):
PATTERNS = [
re.compile(
"/_matrix/media/(r0|v3|v1)/thumbnail/(?P<server_name>[^/]*)/(?P<media_id>[^/]*)$"
)
]
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._is_mine_server_name = hs.is_mine_server_name
self._server_name = hs.hostname
self.prevent_media_downloads_from = hs.config.media.prevent_media_downloads_from
self.dynamic_thumbnails = hs.config.media.dynamic_thumbnails
self.thumbnail_provider = ThumbnailProvider(hs, media_repo, media_storage)
async def on_GET(
self, request: SynapseRequest, server_name: str, media_id: str
) -> None:
# Validate the server name, raising if invalid
parse_and_validate_server_name(server_name)
set_cors_headers(request)
set_corp_headers(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"
max_timeout_ms = parse_integer(
request, "timeout_ms", default=DEFAULT_MAX_TIMEOUT_MS
)
max_timeout_ms = min(max_timeout_ms, MAXIMUM_ALLOWED_MAX_TIMEOUT_MS)
if self._is_mine_server_name(server_name):
if self.dynamic_thumbnails:
await self.thumbnail_provider.select_or_generate_local_thumbnail(
request, media_id, width, height, method, m_type, max_timeout_ms
)
else:
await self.thumbnail_provider.respond_local_thumbnail(
request, media_id, width, height, method, m_type, max_timeout_ms
)
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
ip_address = request.getClientAddress().host
remote_resp_function = (
self.thumbnail_provider.select_or_generate_remote_thumbnail
if self.dynamic_thumbnails
else self.thumbnail_provider.respond_remote_thumbnail
)
await remote_resp_function(
request,
server_name,
media_id,
width,
height,
method,
m_type,
max_timeout_ms,
ip_address,
)
self.media_repo.mark_recently_accessed(server_name, media_id)
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