MatrixSynapse/synapse/rest/client/v1/push_rule.py

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# -*- coding: utf-8 -*-
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# Copyright 2014-2016 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 twisted.internet import defer
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from synapse.api.errors import (
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NotFoundError,
StoreError,
SynapseError,
UnrecognizedRequestError,
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)
from synapse.http.servlet import parse_json_value_from_request, parse_string
from synapse.push.baserules import BASE_RULE_IDS
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from synapse.push.clientformat import format_push_rules_for_user
from synapse.push.rulekinds import PRIORITY_CLASS_MAP
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from synapse.storage.push_rule import InconsistentRuleException, RuleNotFoundException
from .base import ClientV1RestServlet, client_path_patterns
class PushRuleRestServlet(ClientV1RestServlet):
PATTERNS = client_path_patterns("/(?P<path>pushrules/.*)$")
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SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR = (
"Unrecognised request: You probably wanted a trailing slash")
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def __init__(self, hs):
super(PushRuleRestServlet, self).__init__(hs)
self.store = hs.get_datastore()
self.notifier = hs.get_notifier()
self._is_worker = hs.config.worker_app is not None
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@defer.inlineCallbacks
def on_PUT(self, request, path):
if self._is_worker:
raise Exception("Cannot handle PUT /push_rules on worker")
spec = _rule_spec_from_path([x for x in path.split("/")])
try:
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priority_class = _priority_class_from_spec(spec)
except InvalidRuleException as e:
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raise SynapseError(400, str(e))
requester = yield self.auth.get_user_by_req(request)
if '/' in spec['rule_id'] or '\\' in spec['rule_id']:
raise SynapseError(400, "rule_id may not contain slashes")
content = parse_json_value_from_request(request)
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user_id = requester.user.to_string()
if 'attr' in spec:
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yield self.set_rule_attr(user_id, spec, content)
self.notify_user(user_id)
defer.returnValue((200, {}))
if spec['rule_id'].startswith('.'):
# Rule ids starting with '.' are reserved for server default rules.
raise SynapseError(400, "cannot add new rule_ids that start with '.'")
try:
(conditions, actions) = _rule_tuple_from_request_object(
spec['template'],
spec['rule_id'],
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content,
)
except InvalidRuleException as e:
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raise SynapseError(400, str(e))
before = parse_string(request, "before")
if before:
before = _namespaced_rule_id(spec, before)
after = parse_string(request, "after")
if after:
after = _namespaced_rule_id(spec, after)
try:
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yield self.store.add_push_rule(
user_id=user_id,
rule_id=_namespaced_rule_id_from_spec(spec),
priority_class=priority_class,
conditions=conditions,
actions=actions,
before=before,
after=after
)
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self.notify_user(user_id)
except InconsistentRuleException as e:
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raise SynapseError(400, str(e))
except RuleNotFoundException as e:
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raise SynapseError(400, str(e))
defer.returnValue((200, {}))
@defer.inlineCallbacks
def on_DELETE(self, request, path):
if self._is_worker:
raise Exception("Cannot handle DELETE /push_rules on worker")
spec = _rule_spec_from_path([x for x in path.split("/")])
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requester = yield self.auth.get_user_by_req(request)
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user_id = requester.user.to_string()
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namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
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try:
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yield self.store.delete_push_rule(
user_id, namespaced_rule_id
)
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self.notify_user(user_id)
defer.returnValue((200, {}))
except StoreError as e:
if e.code == 404:
raise NotFoundError()
else:
raise
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@defer.inlineCallbacks
def on_GET(self, request, path):
requester = yield self.auth.get_user_by_req(request)
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user_id = requester.user.to_string()
# we build up the full structure and then decide which bits of it
# to send which means doing unnecessary work sometimes but is
# is probably not going to make a whole lot of difference
rules = yield self.store.get_push_rules_for_user(user_id)
rules = format_push_rules_for_user(requester.user, rules)
path = [x for x in path.split("/")][1:]
if path == []:
# we're a reference impl: pedantry is our job.
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raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
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if path[0] == '':
defer.returnValue((200, rules))
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elif path[0] == 'global':
result = _filter_ruleset_with_path(rules['global'], path[1:])
defer.returnValue((200, result))
else:
raise UnrecognizedRequestError()
def on_OPTIONS(self, request, path):
return 200, {}
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def notify_user(self, user_id):
stream_id, _ = self.store.get_push_rules_stream_token()
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self.notifier.on_new_event(
"push_rules_key", stream_id, users=[user_id]
)
def set_rule_attr(self, user_id, spec, val):
if spec['attr'] == 'enabled':
if isinstance(val, dict) and "enabled" in val:
val = val["enabled"]
if not isinstance(val, bool):
# Legacy fallback
# This should *actually* take a dict, but many clients pass
# bools directly, so let's not break them.
raise SynapseError(400, "Value for 'enabled' must be boolean")
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
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return self.store.set_push_rule_enabled(
user_id, namespaced_rule_id, val
)
elif spec['attr'] == 'actions':
actions = val.get('actions')
_check_actions(actions)
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
rule_id = spec['rule_id']
is_default_rule = rule_id.startswith(".")
if is_default_rule:
if namespaced_rule_id not in BASE_RULE_IDS:
raise SynapseError(404, "Unknown rule %r" % (namespaced_rule_id,))
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return self.store.set_push_rule_actions(
user_id, namespaced_rule_id, actions, is_default_rule
)
else:
raise UnrecognizedRequestError()
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def _rule_spec_from_path(path):
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"""Turn a sequence of path components into a rule spec
Args:
path (sequence[unicode]): the URL path components.
Returns:
dict: rule spec dict, containing scope/template/rule_id entries,
and possibly attr.
Raises:
UnrecognizedRequestError if the path components cannot be parsed.
"""
if len(path) < 2:
raise UnrecognizedRequestError()
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if path[0] != 'pushrules':
raise UnrecognizedRequestError()
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scope = path[1]
path = path[2:]
if scope != 'global':
raise UnrecognizedRequestError()
if len(path) == 0:
raise UnrecognizedRequestError()
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template = path[0]
path = path[1:]
if len(path) == 0 or len(path[0]) == 0:
raise UnrecognizedRequestError()
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rule_id = path[0]
spec = {
'scope': scope,
'template': template,
'rule_id': rule_id
}
path = path[1:]
if len(path) > 0 and len(path[0]) > 0:
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spec['attr'] = path[0]
return spec
def _rule_tuple_from_request_object(rule_template, rule_id, req_obj):
if rule_template in ['override', 'underride']:
if 'conditions' not in req_obj:
raise InvalidRuleException("Missing 'conditions'")
conditions = req_obj['conditions']
for c in conditions:
if 'kind' not in c:
raise InvalidRuleException("Condition without 'kind'")
elif rule_template == 'room':
conditions = [{
'kind': 'event_match',
'key': 'room_id',
'pattern': rule_id
}]
elif rule_template == 'sender':
conditions = [{
'kind': 'event_match',
'key': 'user_id',
'pattern': rule_id
}]
elif rule_template == 'content':
if 'pattern' not in req_obj:
raise InvalidRuleException("Content rule missing 'pattern'")
pat = req_obj['pattern']
conditions = [{
'kind': 'event_match',
'key': 'content.body',
'pattern': pat
}]
else:
raise InvalidRuleException("Unknown rule template: %s" % (rule_template,))
if 'actions' not in req_obj:
raise InvalidRuleException("No actions found")
actions = req_obj['actions']
_check_actions(actions)
return conditions, actions
def _check_actions(actions):
if not isinstance(actions, list):
raise InvalidRuleException("No actions found")
for a in actions:
if a in ['notify', 'dont_notify', 'coalesce']:
pass
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elif isinstance(a, dict) and 'set_tweak' in a:
pass
else:
raise InvalidRuleException("Unrecognised action")
def _filter_ruleset_with_path(ruleset, path):
if path == []:
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raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
if path[0] == '':
return ruleset
template_kind = path[0]
if template_kind not in ruleset:
raise UnrecognizedRequestError()
path = path[1:]
if path == []:
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raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
if path[0] == '':
return ruleset[template_kind]
rule_id = path[0]
the_rule = None
for r in ruleset[template_kind]:
if r['rule_id'] == rule_id:
the_rule = r
if the_rule is None:
raise NotFoundError
path = path[1:]
if len(path) == 0:
return the_rule
attr = path[0]
if attr in the_rule:
# Make sure we return a JSON object as the attribute may be a
# JSON value.
return {attr: the_rule[attr]}
else:
raise UnrecognizedRequestError()
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def _priority_class_from_spec(spec):
if spec['template'] not in PRIORITY_CLASS_MAP.keys():
raise InvalidRuleException("Unknown template: %s" % (spec['template']))
pc = PRIORITY_CLASS_MAP[spec['template']]
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return pc
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def _namespaced_rule_id_from_spec(spec):
return _namespaced_rule_id(spec, spec['rule_id'])
def _namespaced_rule_id(spec, rule_id):
return "global/%s/%s" % (spec['template'], rule_id)
class InvalidRuleException(Exception):
pass
def register_servlets(hs, http_server):
PushRuleRestServlet(hs).register(http_server)