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# Copyright 2015, 2016 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.
from ._base import Config, ConfigError
from synapse.appservice import ApplicationService
from synapse.types import UserID
import urllib
import yaml
import logging
logger = logging.getLogger(__name__)
class AppServiceConfig(Config):
def read_config(self, config):
self.app_service_config_files = config.get("app_service_config_files", [])
self.notify_appservices = config.get("notify_appservices", True)
def default_config(cls, **kwargs):
return """\
# A list of application service config file to use
app_service_config_files: []
"""
def load_appservices(hostname, config_files):
"""Returns a list of Application Services from the config files."""
if not isinstance(config_files, list):
logger.warning(
"Expected %s to be a list of AS config files.", config_files
)
return []
# Dicts of value -> filename
seen_as_tokens = {}
seen_ids = {}
appservices = []
for config_file in config_files:
try:
with open(config_file, 'r') as f:
appservice = _load_appservice(
hostname, yaml.load(f), config_file
)
if appservice.id in seen_ids:
raise ConfigError(
"Cannot reuse ID across application services: "
"%s (files: %s, %s)" % (
appservice.id, config_file, seen_ids[appservice.id],
)
)
seen_ids[appservice.id] = config_file
if appservice.token in seen_as_tokens:
raise ConfigError(
"Cannot reuse as_token across application services: "
"%s (files: %s, %s)" % (
appservice.token,
config_file,
seen_as_tokens[appservice.token],
)
)
seen_as_tokens[appservice.token] = config_file
logger.info("Loaded application service: %s", appservice)
appservices.append(appservice)
except Exception as e:
logger.error("Failed to load appservice from '%s'", config_file)
logger.exception(e)
raise
return appservices
def _load_appservice(hostname, as_info, config_filename):
required_string_fields = [
"id", "as_token", "hs_token", "sender_localpart"
]
for field in required_string_fields:
if not isinstance(as_info.get(field), basestring):
raise KeyError("Required string field: '%s' (%s)" % (
field, config_filename,
))
# 'url' must either be a string or explicitly null, not missing
# to avoid accidentally turning off push for ASes.
if (not isinstance(as_info.get("url"), basestring) and
as_info.get("url", "") is not None):
raise KeyError(
"Required string field or explicit null: 'url' (%s)" % (config_filename,)
)
localpart = as_info["sender_localpart"]
if urllib.quote(localpart) != localpart:
raise ValueError(
"sender_localpart needs characters which are not URL encoded."
)
user = UserID(localpart, hostname)
user_id = user.to_string()
# Rate limiting for users of this AS is on by default (excludes sender)
rate_limited = True
if isinstance(as_info.get("rate_limited"), bool):
rate_limited = as_info.get("rate_limited")
# namespace checks
if not isinstance(as_info.get("namespaces"), dict):
raise KeyError("Requires 'namespaces' object.")
for ns in ApplicationService.NS_LIST:
# specific namespaces are optional
if ns in as_info["namespaces"]:
# expect a list of dicts with exclusive and regex keys
for regex_obj in as_info["namespaces"][ns]:
if not isinstance(regex_obj, dict):
raise ValueError(
"Expected namespace entry in %s to be an object,"
" but got %s", ns, regex_obj
)
if not isinstance(regex_obj.get("regex"), basestring):
raise ValueError(
"Missing/bad type 'regex' key in %s", regex_obj
)
if not isinstance(regex_obj.get("exclusive"), bool):
raise ValueError(
"Missing/bad type 'exclusive' key in %s", regex_obj
)
# protocols check
protocols = as_info.get("protocols")
if protocols:
# Because strings are lists in python
if isinstance(protocols, str) or not isinstance(protocols, list):
raise KeyError("Optional 'protocols' must be a list if present.")
for p in protocols:
if not isinstance(p, str):
raise KeyError("Bad value for 'protocols' item")
if as_info["url"] is None:
logger.info(
"(%s) Explicitly empty 'url' provided. This application service"
" will not receive events or queries.",
config_filename,
)
return ApplicationService(
token=as_info["as_token"],
url=as_info["url"],
namespaces=as_info["namespaces"],
hs_token=as_info["hs_token"],
sender=user_id,
id=as_info["id"],
protocols=protocols,
rate_limited=rate_limited
)
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