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# Copyright 2014, 2015 OpenMarket Ltd
#
# 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
import os
from typing import Any, Dict, List, Tuple
from urllib.request import getproxies_environment # type: ignore
import attr
from synapse.config.server import generate_ip_set
from synapse.types import JsonDict
from synapse.util.check_dependencies import check_requirements
from synapse.util.module_loader import load_module
from ._base import Config, ConfigError
logger = logging.getLogger(__name__)
DEFAULT_THUMBNAIL_SIZES = [
{"width": 32, "height": 32, "method": "crop"},
{"width": 96, "height": 96, "method": "crop"},
{"width": 320, "height": 240, "method": "scale"},
{"width": 640, "height": 480, "method": "scale"},
{"width": 800, "height": 600, "method": "scale"},
]
THUMBNAIL_SIZE_YAML = """\
# - width: %(width)i
# height: %(height)i
# method: %(method)s
"""
# A map from the given media type to the type of thumbnail we should generate
# for it.
THUMBNAIL_SUPPORTED_MEDIA_FORMAT_MAP = {
"image/jpeg": "jpeg",
"image/jpg": "jpeg",
"image/webp": "jpeg",
# Thumbnails can only be jpeg or png. We choose png thumbnails for gif
# because it can have transparency.
"image/gif": "png",
"image/png": "png",
}
HTTP_PROXY_SET_WARNING = """\
The Synapse config url_preview_ip_range_blacklist will be ignored as an HTTP(s) proxy is configured."""
@attr.s(frozen=True, slots=True, auto_attribs=True)
class ThumbnailRequirement:
width: int
height: int
method: str
media_type: str
@attr.s(frozen=True, slots=True, auto_attribs=True)
class MediaStorageProviderConfig:
store_local: bool # Whether to store newly uploaded local files
store_remote: bool # Whether to store newly downloaded remote files
store_synchronous: bool # Whether to wait for successful storage for local uploads
def parse_thumbnail_requirements(
thumbnail_sizes: List[JsonDict],
) -> Dict[str, Tuple[ThumbnailRequirement, ...]]:
"""Takes a list of dictionaries with "width", "height", and "method" keys
and creates a map from image media types to the thumbnail size, thumbnailing
method, and thumbnail media type to precalculate
Args:
thumbnail_sizes: List of dicts with "width", "height", and "method" keys
Returns:
Dictionary mapping from media type string to list of ThumbnailRequirement.
"""
requirements: Dict[str, List[ThumbnailRequirement]] = {}
for size in thumbnail_sizes:
width = size["width"]
height = size["height"]
method = size["method"]
for format, thumbnail_format in THUMBNAIL_SUPPORTED_MEDIA_FORMAT_MAP.items():
requirement = requirements.setdefault(format, [])
if thumbnail_format == "jpeg":
requirement.append(
ThumbnailRequirement(width, height, method, "image/jpeg")
)
elif thumbnail_format == "png":
requirement.append(
ThumbnailRequirement(width, height, method, "image/png")
)
else:
raise Exception(
"Unknown thumbnail mapping from %s to %s. This is a Synapse problem, please report!"
% (format, thumbnail_format)
)
return {
media_type: tuple(thumbnails) for media_type, thumbnails in requirements.items()
}
class ContentRepositoryConfig(Config):
section = "media"
def read_config(self, config: JsonDict, **kwargs: Any) -> None:
# Only enable the media repo if either the media repo is enabled or the
# current worker app is the media repo.
if (
self.root.server.enable_media_repo is False
and config.get("worker_app") != "synapse.app.media_repository"
):
self.can_load_media_repo = False
return
else:
self.can_load_media_repo = True
# Whether this instance should be the one to run the background jobs to
# e.g clean up old URL previews.
self.media_instance_running_background_jobs = config.get(
"media_instance_running_background_jobs",
)
self.max_upload_size = self.parse_size(config.get("max_upload_size", "50M"))
self.max_image_pixels = self.parse_size(config.get("max_image_pixels", "32M"))
self.max_spider_size = self.parse_size(config.get("max_spider_size", "10M"))
self.prevent_media_downloads_from = config.get(
"prevent_media_downloads_from", []
)
self.media_store_path = self.ensure_directory(
config.get("media_store_path", "media_store")
)
backup_media_store_path = config.get("backup_media_store_path")
synchronous_backup_media_store = config.get(
"synchronous_backup_media_store", False
)
storage_providers = config.get("media_storage_providers", [])
if backup_media_store_path:
if storage_providers:
raise ConfigError(
"Cannot use both 'backup_media_store_path' and 'storage_providers'"
)
storage_providers = [
{
"module": "file_system",
"store_local": True,
"store_synchronous": synchronous_backup_media_store,
"store_remote": True,
"config": {"directory": backup_media_store_path},
}
]
# This is a list of config that can be used to create the storage
# providers. The entries are tuples of (Class, class_config,
# MediaStorageProviderConfig), where Class is the class of the provider,
# the class_config the config to pass to it, and
# MediaStorageProviderConfig are options for StorageProviderWrapper.
#
# We don't create the storage providers here as not all workers need
# them to be started.
self.media_storage_providers: List[tuple] = []
for i, provider_config in enumerate(storage_providers):
# We special case the module "file_system" so as not to need to
# expose FileStorageProviderBackend
if (
provider_config["module"] == "file_system"
or provider_config["module"] == "synapse.rest.media.v1.storage_provider"
):
provider_config[
"module"
] = "synapse.media.storage_provider.FileStorageProviderBackend"
provider_class, parsed_config = load_module(
provider_config, ("media_storage_providers", "<item %i>" % i)
)
wrapper_config = MediaStorageProviderConfig(
provider_config.get("store_local", False),
provider_config.get("store_remote", False),
provider_config.get("store_synchronous", False),
)
self.media_storage_providers.append(
(provider_class, parsed_config, wrapper_config)
)
self.dynamic_thumbnails = config.get("dynamic_thumbnails", False)
self.thumbnail_requirements = parse_thumbnail_requirements(
config.get("thumbnail_sizes", DEFAULT_THUMBNAIL_SIZES)
)
self.url_preview_enabled = config.get("url_preview_enabled", False)
if self.url_preview_enabled:
check_requirements("url-preview")
proxy_env = getproxies_environment()
if "url_preview_ip_range_blacklist" not in config:
if "http" not in proxy_env or "https" not in proxy_env:
raise ConfigError(
"For security, you must specify an explicit target IP address "
"blacklist in url_preview_ip_range_blacklist for url previewing "
"to work"
)
else:
if "http" in proxy_env or "https" in proxy_env:
logger.warning("".join(HTTP_PROXY_SET_WARNING))
# we always block '0.0.0.0' and '::', which are supposed to be
# unroutable addresses.
self.url_preview_ip_range_blocklist = generate_ip_set(
config["url_preview_ip_range_blacklist"],
["0.0.0.0", "::"],
config_path=("url_preview_ip_range_blacklist",),
)
self.url_preview_ip_range_allowlist = generate_ip_set(
config.get("url_preview_ip_range_whitelist", ()),
config_path=("url_preview_ip_range_whitelist",),
)
self.url_preview_url_blocklist = config.get("url_preview_url_blacklist", ())
self.url_preview_accept_language = config.get(
"url_preview_accept_language"
) or ["en"]
media_retention = config.get("media_retention") or {}
self.media_retention_local_media_lifetime_ms = None
local_media_lifetime = media_retention.get("local_media_lifetime")
if local_media_lifetime is not None:
self.media_retention_local_media_lifetime_ms = self.parse_duration(
local_media_lifetime
)
self.media_retention_remote_media_lifetime_ms = None
remote_media_lifetime = media_retention.get("remote_media_lifetime")
if remote_media_lifetime is not None:
self.media_retention_remote_media_lifetime_ms = self.parse_duration(
remote_media_lifetime
)
def generate_config_section(self, data_dir_path: str, **kwargs: Any) -> str:
assert data_dir_path is not None
media_store = os.path.join(data_dir_path, "media_store")
return f"media_store_path: {media_store}"
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