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Additional type hints for client REST servlets (part 5) (#10736)

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Additionally this enforce type hints on all function signatures inside
of the synapse.rest.client package.
This commit is contained in:
Patrick Cloke 2021-09-03 09:22:22 -04:00 committed by GitHub
parent f58d202e3f
commit ecbfa4fe4f
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8 changed files with 146 additions and 68 deletions
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1
changelog.d/10736.misc Normal file
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@ -0,0 +1 @@
Add missing type hints to REST servlets.

3
mypy.ini
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@ -98,6 +98,9 @@ files =
tests/util/test_itertools.py,
tests/util/test_stream_change_cache.py
[mypy-synapse.rest.client.*]
disallow_untyped_defs = True
[mypy-pymacaroons.*]
ignore_missing_imports = True

19
synapse/http/servlet.py
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@ -572,6 +572,25 @@ def parse_string_from_args(
return strings[0]
@overload
def parse_json_value_from_request(request: Request) -> JsonDict:
...
@overload
def parse_json_value_from_request(
request: Request, allow_empty_body: Literal[False]
) -> JsonDict:
...
@overload
def parse_json_value_from_request(
request: Request, allow_empty_body: bool = False
) -> Optional[JsonDict]:
...
def parse_json_value_from_request(
request: Request, allow_empty_body: bool = False
) -> Optional[JsonDict]:

6
synapse/rest/admin/server_notice_servlet.py
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@ -11,7 +11,7 @@
# 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 typing import TYPE_CHECKING, Optional, Tuple
from typing import TYPE_CHECKING, Awaitable, Optional, Tuple
from synapse.api.constants import EventTypes
from synapse.api.errors import NotFoundError, SynapseError
@ -101,7 +101,9 @@ class SendServerNoticeServlet(RestServlet):
return 200, {"event_id": event.event_id}
def on_PUT(self, request: SynapseRequest, txn_id: str) -> Tuple[int, JsonDict]:
def on_PUT(
self, request: SynapseRequest, txn_id: str
) -> Awaitable[Tuple[int, JsonDict]]:
return self.txns.fetch_or_execute_request(
request, self.on_POST, request, txn_id
)

11
synapse/rest/client/_base.py
View File

@ -16,7 +16,7 @@
"""
import logging
import re
from typing import Iterable, Pattern
from typing import Any, Awaitable, Callable, Iterable, Pattern, Tuple, TypeVar, cast
from synapse.api.errors import InteractiveAuthIncompleteError
from synapse.api.urls import CLIENT_API_PREFIX
@ -76,7 +76,10 @@ def set_timeline_upper_limit(filter_json: JsonDict, filter_timeline_limit: int)
)
def interactive_auth_handler(orig):
C = TypeVar("C", bound=Callable[..., Awaitable[Tuple[int, JsonDict]]])
def interactive_auth_handler(orig: C) -> C:
"""Wraps an on_POST method to handle InteractiveAuthIncompleteErrors
Takes a on_POST method which returns an Awaitable (errcode, body) response
@ -91,10 +94,10 @@ def interactive_auth_handler(orig):
await self.auth_handler.check_auth
"""
async def wrapped(*args, **kwargs):
async def wrapped(*args: Any, **kwargs: Any) -> Tuple[int, JsonDict]:
try:
return await orig(*args, **kwargs)
except InteractiveAuthIncompleteError as e:
return 401, e.result
return wrapped
return cast(C, wrapped)

10
synapse/rest/client/groups.py
View File

@ -15,7 +15,7 @@
import logging
from functools import wraps
from typing import TYPE_CHECKING, Optional, Tuple
from typing import TYPE_CHECKING, Any, Awaitable, Callable, Optional, Tuple
from twisted.web.server import Request
@ -43,14 +43,18 @@ if TYPE_CHECKING:
logger = logging.getLogger(__name__)
def _validate_group_id(f):
def _validate_group_id(
f: Callable[..., Awaitable[Tuple[int, JsonDict]]]
) -> Callable[..., Awaitable[Tuple[int, JsonDict]]]:
"""Wrapper to validate the form of the group ID.
Can be applied to any on_FOO methods that accepts a group ID as a URL parameter.
"""
@wraps(f)
def wrapper(self, request: Request, group_id: str, *args, **kwargs):
def wrapper(
self: RestServlet, request: Request, group_id: str, *args: Any, **kwargs: Any
) -> Awaitable[Tuple[int, JsonDict]]:
if not GroupID.is_valid(group_id):
raise SynapseError(400, "%s is not a legal group ID" % (group_id,))

112
synapse/rest/client/push_rule.py
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@ -12,22 +12,40 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import TYPE_CHECKING, List, Optional, Sequence, Tuple, Union
import attr
from synapse.api.errors import (
NotFoundError,
StoreError,
SynapseError,
UnrecognizedRequestError,
)
from synapse.http.server import HttpServer
from synapse.http.servlet import (
RestServlet,
parse_json_value_from_request,
parse_string,
)
from synapse.http.site import SynapseRequest
from synapse.push.baserules import BASE_RULE_IDS, NEW_RULE_IDS
from synapse.push.clientformat import format_push_rules_for_user
from synapse.push.rulekinds import PRIORITY_CLASS_MAP
from synapse.rest.client._base import client_patterns
from synapse.storage.push_rule import InconsistentRuleException, RuleNotFoundException
from synapse.types import JsonDict
if TYPE_CHECKING:
from synapse.server import HomeServer
@attr.s(slots=True, frozen=True, auto_attribs=True)
class RuleSpec:
scope: str
template: str
rule_id: str
attr: Optional[str]
class PushRuleRestServlet(RestServlet):
@ -36,7 +54,7 @@ class PushRuleRestServlet(RestServlet):
"Unrecognised request: You probably wanted a trailing slash"
)
def __init__(self, hs):
def __init__(self, hs: "HomeServer"):
super().__init__()
self.auth = hs.get_auth()
self.store = hs.get_datastore()
@ -45,7 +63,7 @@ class PushRuleRestServlet(RestServlet):
self._users_new_default_push_rules = hs.config.users_new_default_push_rules
async def on_PUT(self, request, path):
async def on_PUT(self, request: SynapseRequest, path: str) -> Tuple[int, JsonDict]:
if self._is_worker:
raise Exception("Cannot handle PUT /push_rules on worker")
@ -57,25 +75,25 @@ class PushRuleRestServlet(RestServlet):
requester = await self.auth.get_user_by_req(request)
if "/" in spec["rule_id"] or "\\" in spec["rule_id"]:
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)
user_id = requester.user.to_string()
if "attr" in spec:
if spec.attr:
await self.set_rule_attr(user_id, spec, content)
self.notify_user(user_id)
return 200, {}
if spec["rule_id"].startswith("."):
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"], content
spec.template, spec.rule_id, content
)
except InvalidRuleException as e:
raise SynapseError(400, str(e))
@ -106,7 +124,9 @@ class PushRuleRestServlet(RestServlet):
return 200, {}
async def on_DELETE(self, request, path):
async def on_DELETE(
self, request: SynapseRequest, path: str
) -> Tuple[int, JsonDict]:
if self._is_worker:
raise Exception("Cannot handle DELETE /push_rules on worker")
@ -127,7 +147,7 @@ class PushRuleRestServlet(RestServlet):
else:
raise
async def on_GET(self, request, path):
async def on_GET(self, request: SynapseRequest, path: str) -> Tuple[int, JsonDict]:
requester = await self.auth.get_user_by_req(request)
user_id = requester.user.to_string()
@ -138,40 +158,42 @@ class PushRuleRestServlet(RestServlet):
rules = format_push_rules_for_user(requester.user, rules)
path = path.split("/")[1:]
path_parts = path.split("/")[1:]
if path == []:
if path_parts == []:
# we're a reference impl: pedantry is our job.
raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
)
if path[0] == "":
if path_parts[0] == "":
return 200, rules
elif path[0] == "global":
result = _filter_ruleset_with_path(rules["global"], path[1:])
elif path_parts[0] == "global":
result = _filter_ruleset_with_path(rules["global"], path_parts[1:])
return 200, result
else:
raise UnrecognizedRequestError()
def notify_user(self, user_id):
def notify_user(self, user_id: str) -> None:
stream_id = self.store.get_max_push_rules_stream_id()
self.notifier.on_new_event("push_rules_key", stream_id, users=[user_id])
async def set_rule_attr(self, user_id, spec, val):
if spec["attr"] not in ("enabled", "actions"):
async def set_rule_attr(
self, user_id: str, spec: RuleSpec, val: Union[bool, JsonDict]
) -> None:
if spec.attr not in ("enabled", "actions"):
# for the sake of potential future expansion, shouldn't report
# 404 in the case of an unknown request so check it corresponds to
# a known attribute first.
raise UnrecognizedRequestError()
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
rule_id = spec["rule_id"]
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 NotFoundError("Unknown rule %s" % (namespaced_rule_id,))
if spec["attr"] == "enabled":
if spec.attr == "enabled":
if isinstance(val, dict) and "enabled" in val:
val = val["enabled"]
if not isinstance(val, bool):
@ -179,14 +201,18 @@ class PushRuleRestServlet(RestServlet):
# 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")
return await self.store.set_push_rule_enabled(
await self.store.set_push_rule_enabled(
user_id, namespaced_rule_id, val, is_default_rule
)
elif spec["attr"] == "actions":
elif spec.attr == "actions":
if not isinstance(val, dict):
raise SynapseError(400, "Value must be a dict")
actions = val.get("actions")
if not isinstance(actions, list):
raise SynapseError(400, "Value for 'actions' must be dict")
_check_actions(actions)
namespaced_rule_id = _namespaced_rule_id_from_spec(spec)
rule_id = spec["rule_id"]
rule_id = spec.rule_id
is_default_rule = rule_id.startswith(".")
if is_default_rule:
if user_id in self._users_new_default_push_rules:
@ -196,22 +222,21 @@ class PushRuleRestServlet(RestServlet):
if namespaced_rule_id not in rule_ids:
raise SynapseError(404, "Unknown rule %r" % (namespaced_rule_id,))
return await self.store.set_push_rule_actions(
await self.store.set_push_rule_actions(
user_id, namespaced_rule_id, actions, is_default_rule
)
else:
raise UnrecognizedRequestError()
def _rule_spec_from_path(path):
def _rule_spec_from_path(path: Sequence[str]) -> RuleSpec:
"""Turn a sequence of path components into a rule spec
Args:
path (sequence[unicode]): the URL path components.
path: the URL path components.
Returns:
dict: rule spec dict, containing scope/template/rule_id entries,
and possibly attr.
rule spec, containing scope/template/rule_id entries, and possibly attr.
Raises:
UnrecognizedRequestError if the path components cannot be parsed.
@ -237,17 +262,18 @@ def _rule_spec_from_path(path):
rule_id = path[0]
spec = {"scope": scope, "template": template, "rule_id": rule_id}
path = path[1:]
attr = None
if len(path) > 0 and len(path[0]) > 0:
spec["attr"] = path[0]
attr = path[0]
return spec
return RuleSpec(scope, template, rule_id, attr)
def _rule_tuple_from_request_object(rule_template, rule_id, req_obj):
def _rule_tuple_from_request_object(
rule_template: str, rule_id: str, req_obj: JsonDict
) -> Tuple[List[JsonDict], List[Union[str, JsonDict]]]:
if rule_template in ["override", "underride"]:
if "conditions" not in req_obj:
raise InvalidRuleException("Missing 'conditions'")
@ -277,7 +303,7 @@ def _rule_tuple_from_request_object(rule_template, rule_id, req_obj):
return conditions, actions
def _check_actions(actions):
def _check_actions(actions: List[Union[str, JsonDict]]) -> None:
if not isinstance(actions, list):
raise InvalidRuleException("No actions found")
@ -290,7 +316,7 @@ def _check_actions(actions):
raise InvalidRuleException("Unrecognised action")
def _filter_ruleset_with_path(ruleset, path):
def _filter_ruleset_with_path(ruleset: JsonDict, path: List[str]) -> JsonDict:
if path == []:
raise UnrecognizedRequestError(
PushRuleRestServlet.SLIGHTLY_PEDANTIC_TRAILING_SLASH_ERROR
@ -315,7 +341,7 @@ def _filter_ruleset_with_path(ruleset, path):
if r["rule_id"] == rule_id:
the_rule = r
if the_rule is None:
raise NotFoundError
raise NotFoundError()
path = path[1:]
if len(path) == 0:
@ -330,25 +356,25 @@ def _filter_ruleset_with_path(ruleset, path):
raise UnrecognizedRequestError()
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"]]
def _priority_class_from_spec(spec: RuleSpec) -> int:
if spec.template not in PRIORITY_CLASS_MAP.keys():
raise InvalidRuleException("Unknown template: %s" % (spec.template))
pc = PRIORITY_CLASS_MAP[spec.template]
return pc
def _namespaced_rule_id_from_spec(spec):
return _namespaced_rule_id(spec, spec["rule_id"])
def _namespaced_rule_id_from_spec(spec: RuleSpec) -> str:
return _namespaced_rule_id(spec, spec.rule_id)
def _namespaced_rule_id(spec, rule_id):
return "global/%s/%s" % (spec["template"], rule_id)
def _namespaced_rule_id(spec: RuleSpec, rule_id: str) -> str:
return "global/%s/%s" % (spec.template, rule_id)
class InvalidRuleException(Exception):
pass
def register_servlets(hs, http_server):
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
PushRuleRestServlet(hs).register(http_server)

52
synapse/rest/client/transactions.py
View File

@ -15,28 +15,37 @@
"""This module contains logic for storing HTTP PUT transactions. This is used
to ensure idempotency when performing PUTs using the REST API."""
import logging
from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, Tuple
from twisted.python.failure import Failure
from twisted.web.server import Request
from synapse.logging.context import make_deferred_yieldable, run_in_background
from synapse.types import JsonDict
from synapse.util.async_helpers import ObservableDeferred
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
CLEANUP_PERIOD_MS = 1000 * 60 * 30 # 30 mins
class HttpTransactionCache:
def __init__(self, hs):
def __init__(self, hs: "HomeServer"):
self.hs = hs
self.auth = self.hs.get_auth()
self.clock = self.hs.get_clock()
self.transactions = {
# $txn_key: (ObservableDeferred<(res_code, res_json_body)>, timestamp)
}
# $txn_key: (ObservableDeferred<(res_code, res_json_body)>, timestamp)
self.transactions: Dict[
str, Tuple[ObservableDeferred[Tuple[int, JsonDict]], int]
] = {}
# Try to clean entries every 30 mins. This means entries will exist
# for at *LEAST* 30 mins, and at *MOST* 60 mins.
self.cleaner = self.clock.looping_call(self._cleanup, CLEANUP_PERIOD_MS)
def _get_transaction_key(self, request):
def _get_transaction_key(self, request: Request) -> str:
"""A helper function which returns a transaction key that can be used
with TransactionCache for idempotent requests.
@ -45,15 +54,21 @@ class HttpTransactionCache:
path and the access_token for the requesting user.
Args:
request (twisted.web.http.Request): The incoming request. Must
contain an access_token.
request: The incoming request. Must contain an access_token.
Returns:
str: A transaction key
A transaction key
"""
assert request.path is not None
token = self.auth.get_access_token_from_request(request)
return request.path.decode("utf8") + "/" + token
def fetch_or_execute_request(self, request, fn, *args, **kwargs):
def fetch_or_execute_request(
self,
request: Request,
fn: Callable[..., Awaitable[Tuple[int, JsonDict]]],
*args: Any,
**kwargs: Any,
) -> Awaitable[Tuple[int, JsonDict]]:
"""A helper function for fetch_or_execute which extracts
a transaction key from the given request.
@ -64,15 +79,20 @@ class HttpTransactionCache:
self._get_transaction_key(request), fn, *args, **kwargs
)
def fetch_or_execute(self, txn_key, fn, *args, **kwargs):
def fetch_or_execute(
self,
txn_key: str,
fn: Callable[..., Awaitable[Tuple[int, JsonDict]]],
*args: Any,
**kwargs: Any,
) -> Awaitable[Tuple[int, JsonDict]]:
"""Fetches the response for this transaction, or executes the given function
to produce a response for this transaction.
Args:
txn_key (str): A key to ensure idempotency should fetch_or_execute be
called again at a later point in time.
fn (function): A function which returns a tuple of
(response_code, response_dict).
txn_key: A key to ensure idempotency should fetch_or_execute be
called again at a later point in time.
fn: A function which returns a tuple of (response_code, response_dict).
*args: Arguments to pass to fn.
**kwargs: Keyword arguments to pass to fn.
Returns:
@ -90,7 +110,7 @@ class HttpTransactionCache:
# if the request fails with an exception, remove it
# from the transaction map. This is done to ensure that we don't
# cache transient errors like rate-limiting errors, etc.
def remove_from_map(err):
def remove_from_map(err: Failure) -> None:
self.transactions.pop(txn_key, None)
# we deliberately do not propagate the error any further, as we
# expect the observers to have reported it.
@ -99,7 +119,7 @@ class HttpTransactionCache:
return make_deferred_yieldable(observable.observe())
def _cleanup(self):
def _cleanup(self) -> None:
now = self.clock.time_msec()
for key in list(self.transactions):
ts = self.transactions[key][1]