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synapse-old/synapse/config/repository.py

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# -*- coding: utf-8 -*-
# Copyright 2014, 2015 matrix.org
#
# 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 os
from collections import namedtuple
from synapse.util.module_loader import load_module
from ._base import Config, ConfigError
MISSING_NETADDR = (
"Missing netaddr library. This is required for URL preview API."
)
MISSING_LXML = (
"""Missing lxml library. This is required for URL preview API.
Install by running:
pip install lxml
Requires libxslt1-dev system package.
"""
)
ThumbnailRequirement = namedtuple(
"ThumbnailRequirement", ["width", "height", "method", "media_type"]
)
MediaStorageProviderConfig = namedtuple(
"MediaStorageProviderConfig", (
"store_local", # Whether to store newly uploaded local files
"store_remote", # Whether to store newly downloaded remote files
"store_synchronous", # Whether to wait for successful storage for local uploads
),
)
def parse_thumbnail_requirements(thumbnail_sizes):
""" 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): List of dicts with "width", "height", and
"method" keys
Returns:
Dictionary mapping from media type string to list of
ThumbnailRequirement tuples.
"""
requirements = {}
for size in thumbnail_sizes:
width = size["width"]
height = size["height"]
method = size["method"]
jpeg_thumbnail = ThumbnailRequirement(width, height, method, "image/jpeg")
png_thumbnail = ThumbnailRequirement(width, height, method, "image/png")
requirements.setdefault("image/jpeg", []).append(jpeg_thumbnail)
requirements.setdefault("image/gif", []).append(png_thumbnail)
requirements.setdefault("image/png", []).append(png_thumbnail)
return {
media_type: tuple(thumbnails)
for media_type, thumbnails in requirements.items()
}
class ContentRepositoryConfig(Config):
def read_config(self, config):
self.max_upload_size = self.parse_size(config["max_upload_size"])
self.max_image_pixels = self.parse_size(config["max_image_pixels"])
self.max_spider_size = self.parse_size(config["max_spider_size"])
self.media_store_path = self.ensure_directory(config["media_store_path"])
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 = []
for provider_config in storage_providers:
# We special case the module "file_system" so as not to need to
# expose FileStorageProviderBackend
if provider_config["module"] == "file_system":
provider_config["module"] = (
"synapse.rest.media.v1.storage_provider"
".FileStorageProviderBackend"
)
provider_class, parsed_config = load_module(provider_config)
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.uploads_path = self.ensure_directory(config["uploads_path"])
self.dynamic_thumbnails = config["dynamic_thumbnails"]
self.thumbnail_requirements = parse_thumbnail_requirements(
config["thumbnail_sizes"]
)
self.url_preview_enabled = config.get("url_preview_enabled", False)
if self.url_preview_enabled:
try:
import lxml
lxml # To stop unused lint.
except ImportError:
raise ConfigError(MISSING_LXML)
try:
from netaddr import IPSet
except ImportError:
raise ConfigError(MISSING_NETADDR)
if "url_preview_ip_range_blacklist" in config:
self.url_preview_ip_range_blacklist = IPSet(
config["url_preview_ip_range_blacklist"]
)
else:
raise ConfigError(
"For security, you must specify an explicit target IP address "
"blacklist in url_preview_ip_range_blacklist for url previewing "
"to work"
)
self.url_preview_ip_range_whitelist = IPSet(
config.get("url_preview_ip_range_whitelist", ())
)
self.url_preview_url_blacklist = config.get(
"url_preview_url_blacklist", ()
)
def default_config(self, data_dir_path, **kwargs):
media_store = os.path.join(data_dir_path, "media_store")
uploads_path = os.path.join(data_dir_path, "uploads")
return r"""
# Directory where uploaded images and attachments are stored.
#
media_store_path: "%(media_store)s"
# Media storage providers allow media to be stored in different
# locations.
#
#media_storage_providers:
# - module: file_system
# # Whether to write new local files.
# store_local: false
# # Whether to write new remote media
# store_remote: false
# # Whether to block upload requests waiting for write to this
# # provider to complete
# store_synchronous: false
# config:
# directory: /mnt/some/other/directory
# Directory where in-progress uploads are stored.
#
uploads_path: "%(uploads_path)s"
# The largest allowed upload size in bytes
#
max_upload_size: "10M"
# Maximum number of pixels that will be thumbnailed
#
max_image_pixels: "32M"
# Whether to generate new thumbnails on the fly to precisely match
# the resolution requested by the client. If true then whenever
# a new resolution is requested by the client the server will
# generate a new thumbnail. If false the server will pick a thumbnail
# from a precalculated list.
#
dynamic_thumbnails: false
# List of thumbnails to precalculate when an image is uploaded.
#
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
# Is the preview URL API enabled? If enabled, you *must* specify
# an explicit url_preview_ip_range_blacklist of IPs that the spider is
# denied from accessing.
#
url_preview_enabled: False
# List of IP address CIDR ranges that the URL preview spider is denied
# from accessing. There are no defaults: you must explicitly
# specify a list for URL previewing to work. You should specify any
# internal services in your network that you do not want synapse to try
# to connect to, otherwise anyone in any Matrix room could cause your
# synapse to issue arbitrary GET requests to your internal services,
# causing serious security issues.
#
#url_preview_ip_range_blacklist:
# - '127.0.0.0/8'
# - '10.0.0.0/8'
# - '172.16.0.0/12'
# - '192.168.0.0/16'
# - '100.64.0.0/10'
# - '169.254.0.0/16'
# - '::1/128'
# - 'fe80::/64'
# - 'fc00::/7'
#
# List of IP address CIDR ranges that the URL preview spider is allowed
# to access even if they are specified in url_preview_ip_range_blacklist.
# This is useful for specifying exceptions to wide-ranging blacklisted
# target IP ranges - e.g. for enabling URL previews for a specific private
# website only visible in your network.
#
#url_preview_ip_range_whitelist:
# - '192.168.1.1'
# Optional list of URL matches that the URL preview spider is
# denied from accessing. You should use url_preview_ip_range_blacklist
# in preference to this, otherwise someone could define a public DNS
# entry that points to a private IP address and circumvent the blacklist.
# This is more useful if you know there is an entire shape of URL that
# you know that will never want synapse to try to spider.
#
# Each list entry is a dictionary of url component attributes as returned
# by urlparse.urlsplit as applied to the absolute form of the URL. See
# https://docs.python.org/2/library/urlparse.html#urlparse.urlsplit
# The values of the dictionary are treated as an filename match pattern
# applied to that component of URLs, unless they start with a ^ in which
# case they are treated as a regular expression match. If all the
# specified component matches for a given list item succeed, the URL is
# blacklisted.
#
#url_preview_url_blacklist:
# # blacklist any URL with a username in its URI
# - username: '*'
#
# # blacklist all *.google.com URLs
# - netloc: 'google.com'
# - netloc: '*.google.com'
#
# # blacklist all plain HTTP URLs
# - scheme: 'http'
#
# # blacklist http(s)://www.acme.com/foo
# - netloc: 'www.acme.com'
# path: '/foo'
#
# # blacklist any URL with a literal IPv4 address
# - netloc: '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$'
# The largest allowed URL preview spidering size in bytes
max_spider_size: "10M"
""" % locals()
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