mirror of https://github.com/watcha-fr/synapse
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.8 KiB
89 lines
2.8 KiB
# 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.
|
|
import logging
|
|
from typing import Optional
|
|
|
|
import attr
|
|
|
|
from synapse.api.errors import SynapseError
|
|
from synapse.http.servlet import parse_integer, parse_string
|
|
from synapse.http.site import SynapseRequest
|
|
from synapse.storage.databases.main import DataStore
|
|
from synapse.types import StreamToken
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
MAX_LIMIT = 1000
|
|
|
|
|
|
@attr.s(slots=True, auto_attribs=True)
|
|
class PaginationConfig:
|
|
"""A configuration object which stores pagination parameters."""
|
|
|
|
from_token: Optional[StreamToken]
|
|
to_token: Optional[StreamToken]
|
|
direction: str
|
|
limit: Optional[int]
|
|
|
|
@classmethod
|
|
async def from_request(
|
|
cls,
|
|
store: "DataStore",
|
|
request: SynapseRequest,
|
|
raise_invalid_params: bool = True,
|
|
default_limit: Optional[int] = None,
|
|
) -> "PaginationConfig":
|
|
direction = parse_string(request, "dir", default="f", allowed_values=["f", "b"])
|
|
|
|
from_tok_str = parse_string(request, "from")
|
|
to_tok_str = parse_string(request, "to")
|
|
|
|
try:
|
|
from_tok = None
|
|
if from_tok_str == "END":
|
|
from_tok = None # For backwards compat.
|
|
elif from_tok_str:
|
|
from_tok = await StreamToken.from_string(store, from_tok_str)
|
|
except Exception:
|
|
raise SynapseError(400, "'from' parameter is invalid")
|
|
|
|
try:
|
|
to_tok = None
|
|
if to_tok_str:
|
|
to_tok = await StreamToken.from_string(store, to_tok_str)
|
|
except Exception:
|
|
raise SynapseError(400, "'to' parameter is invalid")
|
|
|
|
limit = parse_integer(request, "limit", default=default_limit)
|
|
|
|
if limit:
|
|
if limit < 0:
|
|
raise SynapseError(400, "Limit must be 0 or above")
|
|
|
|
limit = min(int(limit), MAX_LIMIT)
|
|
|
|
try:
|
|
return PaginationConfig(from_tok, to_tok, direction, limit)
|
|
except Exception:
|
|
logger.exception("Failed to create pagination config")
|
|
raise SynapseError(400, "Invalid request.")
|
|
|
|
def __repr__(self) -> str:
|
|
return "PaginationConfig(from_tok=%r, to_tok=%r, direction=%r, limit=%r)" % (
|
|
self.from_token,
|
|
self.to_token,
|
|
self.direction,
|
|
self.limit,
|
|
)
|
|
|