107 lines
3.4 KiB
Python
107 lines
3.4 KiB
Python
# Copyright 2014-2016 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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"""This module contains base REST classes for constructing client v1 servlets.
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"""
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import logging
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import re
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from typing import Any, Awaitable, Callable, Iterable, Pattern, Tuple, TypeVar, cast
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from synapse.api.errors import InteractiveAuthIncompleteError
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from synapse.api.urls import CLIENT_API_PREFIX
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from synapse.types import JsonDict
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logger = logging.getLogger(__name__)
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def client_patterns(
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path_regex: str,
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releases: Iterable[str] = ("r0", "v3"),
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unstable: bool = True,
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v1: bool = False,
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) -> Iterable[Pattern]:
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"""Creates a regex compiled client path with the correct client path
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prefix.
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Args:
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path_regex: The regex string to match. This should NOT have a ^
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as this will be prefixed.
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releases: An iterable of releases to include this endpoint under.
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unstable: If true, include this endpoint under the "unstable" prefix.
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v1: If true, include this endpoint under the "api/v1" prefix.
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Returns:
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An iterable of patterns.
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"""
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versions = []
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if v1:
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versions.append("api/v1")
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versions.extend(releases)
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if unstable:
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versions.append("unstable")
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if len(versions) == 1:
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versions_str = versions[0]
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elif len(versions) > 1:
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versions_str = "(" + "|".join(versions) + ")"
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else:
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raise RuntimeError("Must have at least one version for a URL")
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return [re.compile("^" + CLIENT_API_PREFIX + "/" + versions_str + path_regex)]
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def set_timeline_upper_limit(filter_json: JsonDict, filter_timeline_limit: int) -> None:
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"""
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Enforces a maximum limit of a timeline query.
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Params:
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filter_json: The timeline query to modify.
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filter_timeline_limit: The maximum limit to allow, passing -1 will
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disable enforcing a maximum limit.
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"""
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if filter_timeline_limit < 0:
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return # no upper limits
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timeline = filter_json.get("room", {}).get("timeline", {})
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if "limit" in timeline:
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filter_json["room"]["timeline"]["limit"] = min(
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filter_json["room"]["timeline"]["limit"], filter_timeline_limit
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)
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C = TypeVar("C", bound=Callable[..., Awaitable[Tuple[int, JsonDict]]])
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def interactive_auth_handler(orig: C) -> C:
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"""Wraps an on_POST method to handle InteractiveAuthIncompleteErrors
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Takes a on_POST method which returns an Awaitable (errcode, body) response
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and adds exception handling to turn a InteractiveAuthIncompleteError into
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a 401 response.
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Normal usage is:
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@interactive_auth_handler
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async def on_POST(self, request):
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# ...
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await self.auth_handler.check_auth
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"""
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async def wrapped(*args: Any, **kwargs: Any) -> Tuple[int, JsonDict]:
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try:
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return await orig(*args, **kwargs)
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except InteractiveAuthIncompleteError as e:
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return 401, e.result
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return cast(C, wrapped)
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