368 lines
14 KiB
Python
368 lines
14 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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from collections import namedtuple
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from typing import Dict, List
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from synapse.config.server import DEFAULT_IP_RANGE_BLACKLIST, generate_ip_set
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from synapse.python_dependencies import DependencyException, check_requirements
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from synapse.util.module_loader import load_module
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from ._base import Config, ConfigError
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DEFAULT_THUMBNAIL_SIZES = [
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{"width": 32, "height": 32, "method": "crop"},
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{"width": 96, "height": 96, "method": "crop"},
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{"width": 320, "height": 240, "method": "scale"},
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{"width": 640, "height": 480, "method": "scale"},
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{"width": 800, "height": 600, "method": "scale"},
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]
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THUMBNAIL_SIZE_YAML = """\
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# - width: %(width)i
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# height: %(height)i
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# method: %(method)s
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"""
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ThumbnailRequirement = namedtuple(
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"ThumbnailRequirement", ["width", "height", "method", "media_type"]
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)
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MediaStorageProviderConfig = namedtuple(
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"MediaStorageProviderConfig",
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(
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"store_local", # Whether to store newly uploaded local files
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"store_remote", # Whether to store newly downloaded remote files
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"store_synchronous", # Whether to wait for successful storage for local uploads
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),
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)
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def parse_thumbnail_requirements(thumbnail_sizes):
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"""Takes a list of dictionaries with "width", "height", and "method" keys
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and creates a map from image media types to the thumbnail size, thumbnailing
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method, and thumbnail media type to precalculate
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Args:
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thumbnail_sizes(list): List of dicts with "width", "height", and
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"method" keys
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Returns:
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Dictionary mapping from media type string to list of
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ThumbnailRequirement tuples.
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"""
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requirements = {} # type: Dict[str, List]
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for size in thumbnail_sizes:
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width = size["width"]
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height = size["height"]
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method = size["method"]
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jpeg_thumbnail = ThumbnailRequirement(width, height, method, "image/jpeg")
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png_thumbnail = ThumbnailRequirement(width, height, method, "image/png")
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requirements.setdefault("image/jpeg", []).append(jpeg_thumbnail)
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requirements.setdefault("image/webp", []).append(jpeg_thumbnail)
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requirements.setdefault("image/gif", []).append(png_thumbnail)
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requirements.setdefault("image/png", []).append(png_thumbnail)
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return {
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media_type: tuple(thumbnails) for media_type, thumbnails in requirements.items()
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}
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class ContentRepositoryConfig(Config):
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section = "media"
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def read_config(self, config, **kwargs):
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# Only enable the media repo if either the media repo is enabled or the
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# current worker app is the media repo.
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if (
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self.enable_media_repo is False
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and config.get("worker_app") != "synapse.app.media_repository"
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):
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self.can_load_media_repo = False
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return
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else:
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self.can_load_media_repo = True
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# Whether this instance should be the one to run the background jobs to
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# e.g clean up old URL previews.
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self.media_instance_running_background_jobs = config.get(
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"media_instance_running_background_jobs",
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)
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self.max_upload_size = self.parse_size(config.get("max_upload_size", "50M"))
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self.max_image_pixels = self.parse_size(config.get("max_image_pixels", "32M"))
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self.max_spider_size = self.parse_size(config.get("max_spider_size", "10M"))
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self.media_store_path = self.ensure_directory(
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config.get("media_store_path", "media_store")
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)
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backup_media_store_path = config.get("backup_media_store_path")
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synchronous_backup_media_store = config.get(
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"synchronous_backup_media_store", False
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)
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storage_providers = config.get("media_storage_providers", [])
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if backup_media_store_path:
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if storage_providers:
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raise ConfigError(
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"Cannot use both 'backup_media_store_path' and 'storage_providers'"
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)
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storage_providers = [
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{
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"module": "file_system",
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"store_local": True,
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"store_synchronous": synchronous_backup_media_store,
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"store_remote": True,
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"config": {"directory": backup_media_store_path},
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}
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]
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# This is a list of config that can be used to create the storage
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# providers. The entries are tuples of (Class, class_config,
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# MediaStorageProviderConfig), where Class is the class of the provider,
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# the class_config the config to pass to it, and
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# MediaStorageProviderConfig are options for StorageProviderWrapper.
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#
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# We don't create the storage providers here as not all workers need
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# them to be started.
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self.media_storage_providers = [] # type: List[tuple]
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for i, provider_config in enumerate(storage_providers):
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# We special case the module "file_system" so as not to need to
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# expose FileStorageProviderBackend
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if provider_config["module"] == "file_system":
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provider_config["module"] = (
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"synapse.rest.media.v1.storage_provider"
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".FileStorageProviderBackend"
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)
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provider_class, parsed_config = load_module(
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provider_config, ("media_storage_providers", "<item %i>" % i)
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)
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wrapper_config = MediaStorageProviderConfig(
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provider_config.get("store_local", False),
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provider_config.get("store_remote", False),
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provider_config.get("store_synchronous", False),
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)
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self.media_storage_providers.append(
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(provider_class, parsed_config, wrapper_config)
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)
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self.dynamic_thumbnails = config.get("dynamic_thumbnails", False)
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self.thumbnail_requirements = parse_thumbnail_requirements(
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config.get("thumbnail_sizes", DEFAULT_THUMBNAIL_SIZES)
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)
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self.url_preview_enabled = config.get("url_preview_enabled", False)
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if self.url_preview_enabled:
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try:
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check_requirements("url_preview")
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except DependencyException as e:
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raise ConfigError(
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e.message # noqa: B306, DependencyException.message is a property
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)
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if "url_preview_ip_range_blacklist" not in config:
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raise ConfigError(
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"For security, you must specify an explicit target IP address "
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"blacklist in url_preview_ip_range_blacklist for url previewing "
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"to work"
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)
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# we always blacklist '0.0.0.0' and '::', which are supposed to be
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# unroutable addresses.
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self.url_preview_ip_range_blacklist = generate_ip_set(
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config["url_preview_ip_range_blacklist"],
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["0.0.0.0", "::"],
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config_path=("url_preview_ip_range_blacklist",),
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)
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self.url_preview_ip_range_whitelist = generate_ip_set(
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config.get("url_preview_ip_range_whitelist", ()),
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config_path=("url_preview_ip_range_whitelist",),
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)
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self.url_preview_url_blacklist = config.get("url_preview_url_blacklist", ())
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self.url_preview_accept_language = config.get(
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"url_preview_accept_language"
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) or ["en"]
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def generate_config_section(self, data_dir_path, **kwargs):
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media_store = os.path.join(data_dir_path, "media_store")
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formatted_thumbnail_sizes = "".join(
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THUMBNAIL_SIZE_YAML % s for s in DEFAULT_THUMBNAIL_SIZES
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)
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# strip final NL
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formatted_thumbnail_sizes = formatted_thumbnail_sizes[:-1]
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ip_range_blacklist = "\n".join(
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" # - '%s'" % ip for ip in DEFAULT_IP_RANGE_BLACKLIST
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)
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return (
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r"""
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## Media Store ##
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# Enable the media store service in the Synapse master. Uncomment the
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# following if you are using a separate media store worker.
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#
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#enable_media_repo: false
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# Directory where uploaded images and attachments are stored.
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#
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media_store_path: "%(media_store)s"
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# Media storage providers allow media to be stored in different
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# locations.
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#
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#media_storage_providers:
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# - module: file_system
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# # Whether to store newly uploaded local files
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# store_local: false
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# # Whether to store newly downloaded remote files
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# store_remote: false
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# # Whether to wait for successful storage for local uploads
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# store_synchronous: false
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# config:
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# directory: /mnt/some/other/directory
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# The largest allowed upload size in bytes
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#
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#max_upload_size: 50M
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# Maximum number of pixels that will be thumbnailed
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#
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#max_image_pixels: 32M
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# Whether to generate new thumbnails on the fly to precisely match
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# the resolution requested by the client. If true then whenever
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# a new resolution is requested by the client the server will
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# generate a new thumbnail. If false the server will pick a thumbnail
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# from a precalculated list.
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#
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#dynamic_thumbnails: false
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# List of thumbnails to precalculate when an image is uploaded.
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#
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#thumbnail_sizes:
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%(formatted_thumbnail_sizes)s
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# Is the preview URL API enabled?
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#
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# 'false' by default: uncomment the following to enable it (and specify a
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# url_preview_ip_range_blacklist blacklist).
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#
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#url_preview_enabled: true
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# List of IP address CIDR ranges that the URL preview spider is denied
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# from accessing. There are no defaults: you must explicitly
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# specify a list for URL previewing to work. You should specify any
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# internal services in your network that you do not want synapse to try
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# to connect to, otherwise anyone in any Matrix room could cause your
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# synapse to issue arbitrary GET requests to your internal services,
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# causing serious security issues.
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#
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# (0.0.0.0 and :: are always blacklisted, whether or not they are explicitly
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# listed here, since they correspond to unroutable addresses.)
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#
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# This must be specified if url_preview_enabled is set. It is recommended that
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# you uncomment the following list as a starting point.
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#
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#url_preview_ip_range_blacklist:
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%(ip_range_blacklist)s
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# List of IP address CIDR ranges that the URL preview spider is allowed
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# to access even if they are specified in url_preview_ip_range_blacklist.
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# This is useful for specifying exceptions to wide-ranging blacklisted
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# target IP ranges - e.g. for enabling URL previews for a specific private
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# website only visible in your network.
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#
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#url_preview_ip_range_whitelist:
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# - '192.168.1.1'
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# Optional list of URL matches that the URL preview spider is
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# denied from accessing. You should use url_preview_ip_range_blacklist
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# in preference to this, otherwise someone could define a public DNS
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# entry that points to a private IP address and circumvent the blacklist.
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# This is more useful if you know there is an entire shape of URL that
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# you know that will never want synapse to try to spider.
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#
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# Each list entry is a dictionary of url component attributes as returned
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# by urlparse.urlsplit as applied to the absolute form of the URL. See
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# https://docs.python.org/2/library/urlparse.html#urlparse.urlsplit
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# The values of the dictionary are treated as an filename match pattern
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# applied to that component of URLs, unless they start with a ^ in which
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# case they are treated as a regular expression match. If all the
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# specified component matches for a given list item succeed, the URL is
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# blacklisted.
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#
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#url_preview_url_blacklist:
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# # blacklist any URL with a username in its URI
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# - username: '*'
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#
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# # blacklist all *.google.com URLs
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# - netloc: 'google.com'
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# - netloc: '*.google.com'
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#
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# # blacklist all plain HTTP URLs
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# - scheme: 'http'
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#
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# # blacklist http(s)://www.acme.com/foo
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# - netloc: 'www.acme.com'
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# path: '/foo'
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#
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# # blacklist any URL with a literal IPv4 address
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# - netloc: '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$'
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# The largest allowed URL preview spidering size in bytes
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#
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#max_spider_size: 10M
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# A list of values for the Accept-Language HTTP header used when
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# downloading webpages during URL preview generation. This allows
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# Synapse to specify the preferred languages that URL previews should
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# be in when communicating with remote servers.
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#
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# Each value is a IETF language tag; a 2-3 letter identifier for a
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# language, optionally followed by subtags separated by '-', specifying
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# a country or region variant.
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#
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# Multiple values can be provided, and a weight can be added to each by
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# using quality value syntax (;q=). '*' translates to any language.
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#
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# Defaults to "en".
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#
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# Example:
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#
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# url_preview_accept_language:
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# - en-UK
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# - en-US;q=0.9
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# - fr;q=0.8
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# - *;q=0.7
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#
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url_preview_accept_language:
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# - en
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"""
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% locals()
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)
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