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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# 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 IO, TYPE_CHECKING, Dict, List, Optional, Tuple
from synapse.api.errors import Codes, SynapseError
from synapse.http.server import respond_with_json
from synapse.http.servlet import RestServlet, parse_bytes_from_args
from synapse.http.site import SynapseRequest
from synapse.media.media_storage import SpamMediaException
if TYPE_CHECKING:
from synapse.media.media_repository import MediaRepository
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
# The name of the lock to use when uploading media.
_UPLOAD_MEDIA_LOCK_NAME = "upload_media"
class BaseUploadServlet(RestServlet):
def __init__(self, hs: "HomeServer", media_repo: "MediaRepository"):
super().__init__()
self.media_repo = media_repo
self.filepaths = media_repo.filepaths
self.store = hs.get_datastores().main
self.server_name = hs.hostname
self.auth = hs.get_auth()
self.max_upload_size = hs.config.media.max_upload_size
def _get_file_metadata(
self, request: SynapseRequest
) -> Tuple[int, Optional[str], str]:
raw_content_length = request.getHeader("Content-Length")
if raw_content_length is None:
raise SynapseError(msg="Request must specify a Content-Length", code=400)
try:
content_length = int(raw_content_length)
except ValueError:
raise SynapseError(msg="Content-Length value is invalid", code=400)
if content_length > self.max_upload_size:
raise SynapseError(
msg="Upload request body is too large",
code=413,
errcode=Codes.TOO_LARGE,
)
args: Dict[bytes, List[bytes]] = request.args # type: ignore
upload_name_bytes = parse_bytes_from_args(args, "filename")
if upload_name_bytes:
try:
upload_name: Optional[str] = upload_name_bytes.decode("utf8")
except UnicodeDecodeError:
raise SynapseError(
msg="Invalid UTF-8 filename parameter: %r" % (upload_name_bytes,),
code=400,
)
# If the name is falsey (e.g. an empty byte string) ensure it is None.
else:
upload_name = None
headers = request.requestHeaders
if headers.hasHeader(b"Content-Type"):
content_type_headers = headers.getRawHeaders(b"Content-Type")
assert content_type_headers # for mypy
media_type = content_type_headers[0].decode("ascii")
else:
media_type = "application/octet-stream"
# if headers.hasHeader(b"Content-Disposition"):
# disposition = headers.getRawHeaders(b"Content-Disposition")[0]
# TODO(markjh): parse content-dispostion
return content_length, upload_name, media_type
class UploadServlet(BaseUploadServlet):
PATTERNS = [re.compile("/_matrix/media/(r0|v3|v1)/upload$")]
async def on_POST(self, request: SynapseRequest) -> None:
requester = await self.auth.get_user_by_req(request)
content_length, upload_name, media_type = self._get_file_metadata(request)
try:
content: IO = request.content # type: ignore
content_uri = await self.media_repo.create_content(
media_type, upload_name, content, content_length, requester.user
)
except SpamMediaException:
# For uploading of media we want to respond with a 400, instead of
# the default 404, as that would just be confusing.
raise SynapseError(400, "Bad content")
logger.info("Uploaded content with URI '%s'", content_uri)
respond_with_json(
request, 200, {"content_uri": str(content_uri)}, send_cors=True
)
class AsyncUploadServlet(BaseUploadServlet):
PATTERNS = [
re.compile(
"/_matrix/media/v3/upload/(?P<server_name>[^/]*)/(?P<media_id>[^/]*)$"
)
]
async def on_PUT(
self, request: SynapseRequest, server_name: str, media_id: str
) -> None:
requester = await self.auth.get_user_by_req(request)
if server_name != self.server_name:
raise SynapseError(
404,
"Non-local server name specified",
errcode=Codes.NOT_FOUND,
)
lock = await self.store.try_acquire_lock(_UPLOAD_MEDIA_LOCK_NAME, media_id)
if not lock:
raise SynapseError(
409,
"Media ID cannot be overwritten",
errcode=Codes.CANNOT_OVERWRITE_MEDIA,
)
async with lock:
await self.media_repo.verify_can_upload(media_id, requester.user)
content_length, upload_name, media_type = self._get_file_metadata(request)
try:
content: IO = request.content # type: ignore
await self.media_repo.update_content(
media_id,
media_type,
upload_name,
content,
content_length,
requester.user,
)
except SpamMediaException:
# For uploading of media we want to respond with a 400, instead of
# the default 404, as that would just be confusing.
raise SynapseError(400, "Bad content")
logger.info("Uploaded content for media ID %r", media_id)
respond_with_json(request, 200, {}, send_cors=True)
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