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Add type hints to additional servlet functions (#10437) 

Improves type hints for:

* parse_{boolean,integer}
* parse_{boolean,integer}_from_args
* parse_json_{value,object}_from_request

And fixes any incorrect calls that resulted from unknown types.
This commit is contained in:
Patrick Cloke 2021-07-21 14:12:22 -04:00 committed by GitHub
parent 5b68816de9
commit 590cc4e888
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 177 additions and 67 deletions
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1
changelog.d/10437.misc Normal file
View File

@ -0,0 +1 @@
Improve servlet type hints.

13
synapse/federation/transport/server.py
View File

@ -984,7 +984,7 @@ class PublicRoomList(BaseFederationServlet):
limit = parse_integer_from_args(query, "limit", 0)
since_token = parse_string_from_args(query, "since", None)
include_all_networks = parse_boolean_from_args(
query, "include_all_networks", False
query, "include_all_networks", default=False
)
third_party_instance_id = parse_string_from_args(
query, "third_party_instance_id", None
@ -1908,16 +1908,7 @@ class FederationSpaceSummaryServlet(BaseFederationServlet):
suggested_only = parse_boolean_from_args(query, "suggested_only", default=False)
max_rooms_per_space = parse_integer_from_args(query, "max_rooms_per_space")
exclude_rooms = []
if b"exclude_rooms" in query:
try:
exclude_rooms = [
room_id.decode("ascii") for room_id in query[b"exclude_rooms"]
]
except Exception:
raise SynapseError(
400, "Bad query parameter for exclude_rooms", Codes.INVALID_PARAM
)
exclude_rooms = parse_strings_from_args(query, "exclude_rooms", default=[])
return 200, await self.handler.federation_space_summary(
origin, room_id, suggested_only, max_rooms_per_space, exclude_rooms

222
synapse/http/servlet.py
View File

@ -14,47 +14,86 @@
""" This module contains base REST classes for constructing REST servlets. """
import logging
from typing import Dict, Iterable, List, Optional, overload
from typing import Iterable, List, Mapping, Optional, Sequence, overload
from typing_extensions import Literal
from twisted.web.server import Request
from synapse.api.errors import Codes, SynapseError
from synapse.types import JsonDict
from synapse.util import json_decoder
logger = logging.getLogger(__name__)
def parse_integer(request, name, default=None, required=False):
@overload
def parse_integer(request: Request, name: str, default: int) -> int:
...
@overload
def parse_integer(request: Request, name: str, *, required: Literal[True]) -> int:
...
@overload
def parse_integer(
request: Request, name: str, default: Optional[int] = None, required: bool = False
) -> Optional[int]:
...
def parse_integer(
request: Request, name: str, default: Optional[int] = None, required: bool = False
) -> Optional[int]:
"""Parse an integer parameter from the request string
Args:
request: the twisted HTTP request.
name (bytes/unicode): the name of the query parameter.
default (int|None): value to use if the parameter is absent, defaults
to None.
required (bool): whether to raise a 400 SynapseError if the
parameter is absent, defaults to False.
name: the name of the query parameter.
default: value to use if the parameter is absent, defaults to None.
required: whether to raise a 400 SynapseError if the parameter is absent,
defaults to False.
Returns:
int|None: An int value or the default.
An int value or the default.
Raises:
SynapseError: if the parameter is absent and required, or if the
parameter is present and not an integer.
"""
return parse_integer_from_args(request.args, name, default, required)
args: Mapping[bytes, Sequence[bytes]] = request.args # type: ignore
return parse_integer_from_args(args, name, default, required)
def parse_integer_from_args(args, name, default=None, required=False):
def parse_integer_from_args(
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[int] = None,
required: bool = False,
) -> Optional[int]:
"""Parse an integer parameter from the request string
if not isinstance(name, bytes):
name = name.encode("ascii")
Args:
args: A mapping of request args as bytes to a list of bytes (e.g. request.args).
name: the name of the query parameter.
default: value to use if the parameter is absent, defaults to None.
required: whether to raise a 400 SynapseError if the parameter is absent,
defaults to False.
if name in args:
Returns:
An int value or the default.
Raises:
SynapseError: if the parameter is absent and required, or if the
parameter is present and not an integer.
"""
name_bytes = name.encode("ascii")
if name_bytes in args:
try:
return int(args[name][0])
return int(args[name_bytes][0])
except Exception:
message = "Query parameter %r must be an integer" % (name,)
raise SynapseError(400, message, errcode=Codes.INVALID_PARAM)
@ -66,36 +105,102 @@ def parse_integer_from_args(args, name, default=None, required=False):
return default
def parse_boolean(request, name, default=None, required=False):
@overload
def parse_boolean(request: Request, name: str, default: bool) -> bool:
...
@overload
def parse_boolean(request: Request, name: str, *, required: Literal[True]) -> bool:
...
@overload
def parse_boolean(
request: Request, name: str, default: Optional[bool] = None, required: bool = False
) -> Optional[bool]:
...
def parse_boolean(
request: Request, name: str, default: Optional[bool] = None, required: bool = False
) -> Optional[bool]:
"""Parse a boolean parameter from the request query string
Args:
request: the twisted HTTP request.
name (bytes/unicode): the name of the query parameter.
default (bool|None): value to use if the parameter is absent, defaults
to None.
required (bool): whether to raise a 400 SynapseError if the
parameter is absent, defaults to False.
name: the name of the query parameter.
default: value to use if the parameter is absent, defaults to None.
required: whether to raise a 400 SynapseError if the parameter is absent,
defaults to False.
Returns:
bool|None: A bool value or the default.
A bool value or the default.
Raises:
SynapseError: if the parameter is absent and required, or if the
parameter is present and not one of "true" or "false".
"""
return parse_boolean_from_args(request.args, name, default, required)
args: Mapping[bytes, Sequence[bytes]] = request.args # type: ignore
return parse_boolean_from_args(args, name, default, required)
def parse_boolean_from_args(args, name, default=None, required=False):
@overload
def parse_boolean_from_args(
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: bool,
) -> bool:
...
if not isinstance(name, bytes):
name = name.encode("ascii")
if name in args:
@overload
def parse_boolean_from_args(
args: Mapping[bytes, Sequence[bytes]],
name: str,
*,
required: Literal[True],
) -> bool:
...
@overload
def parse_boolean_from_args(
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[bool] = None,
required: bool = False,
) -> Optional[bool]:
...
def parse_boolean_from_args(
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[bool] = None,
required: bool = False,
) -> Optional[bool]:
"""Parse a boolean parameter from the request query string
Args:
args: A mapping of request args as bytes to a list of bytes (e.g. request.args).
name: the name of the query parameter.
default: value to use if the parameter is absent, defaults to None.
required: whether to raise a 400 SynapseError if the parameter is absent,
defaults to False.
Returns:
A bool value or the default.
Raises:
SynapseError: if the parameter is absent and required, or if the
parameter is present and not one of "true" or "false".
"""
name_bytes = name.encode("ascii")
if name_bytes in args:
try:
return {b"true": True, b"false": False}[args[name][0]]
return {b"true": True, b"false": False}[args[name_bytes][0]]
except Exception:
message = (
"Boolean query parameter %r must be one of ['true', 'false']"
@ -111,7 +216,7 @@ def parse_boolean_from_args(args, name, default=None, required=False):
@overload
def parse_bytes_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[bytes] = None,
) -> Optional[bytes]:
@ -120,7 +225,7 @@ def parse_bytes_from_args(
@overload
def parse_bytes_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Literal[None] = None,
*,
@ -131,7 +236,7 @@ def parse_bytes_from_args(
@overload
def parse_bytes_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[bytes] = None,
required: bool = False,
@ -140,7 +245,7 @@ def parse_bytes_from_args(
def parse_bytes_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[bytes] = None,
required: bool = False,
@ -241,7 +346,7 @@ def parse_string(
parameter is present, must be one of a list of allowed values and
is not one of those allowed values.
"""
args: Dict[bytes, List[bytes]] = request.args # type: ignore
args: Mapping[bytes, Sequence[bytes]] = request.args # type: ignore
return parse_string_from_args(
args,
name,
@ -275,9 +380,8 @@ def _parse_string_value(
@overload
def parse_strings_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[List[str]] = None,
*,
allowed_values: Optional[Iterable[str]] = None,
encoding: str = "ascii",
@ -287,9 +391,20 @@ def parse_strings_from_args(
@overload
def parse_strings_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: List[str],
*,
allowed_values: Optional[Iterable[str]] = None,
encoding: str = "ascii",
) -> List[str]:
...
@overload
def parse_strings_from_args(
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[List[str]] = None,
*,
required: Literal[True],
allowed_values: Optional[Iterable[str]] = None,
@ -300,7 +415,7 @@ def parse_strings_from_args(
@overload
def parse_strings_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[List[str]] = None,
*,
@ -312,7 +427,7 @@ def parse_strings_from_args(
def parse_strings_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[List[str]] = None,
required: bool = False,
@ -361,7 +476,7 @@ def parse_strings_from_args(
@overload
def parse_string_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[str] = None,
*,
@ -373,7 +488,7 @@ def parse_string_from_args(
@overload
def parse_string_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[str] = None,
*,
@ -386,7 +501,7 @@ def parse_string_from_args(
@overload
def parse_string_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[str] = None,
required: bool = False,
@ -397,7 +512,7 @@ def parse_string_from_args(
def parse_string_from_args(
args: Dict[bytes, List[bytes]],
args: Mapping[bytes, Sequence[bytes]],
name: str,
default: Optional[str] = None,
required: bool = False,
@ -445,13 +560,14 @@ def parse_string_from_args(
return strings[0]
def parse_json_value_from_request(request, allow_empty_body=False):
def parse_json_value_from_request(
request: Request, allow_empty_body: bool = False
) -> Optional[JsonDict]:
"""Parse a JSON value from the body of a twisted HTTP request.
Args:
request: the twisted HTTP request.
allow_empty_body (bool): if True, an empty body will be accepted and
turned into None
allow_empty_body: if True, an empty body will be accepted and turned into None
Returns:
The JSON value.
@ -460,7 +576,7 @@ def parse_json_value_from_request(request, allow_empty_body=False):
SynapseError if the request body couldn't be decoded as JSON.
"""
try:
content_bytes = request.content.read()
content_bytes = request.content.read() # type: ignore
except Exception:
raise SynapseError(400, "Error reading JSON content.")
@ -476,13 +592,15 @@ def parse_json_value_from_request(request, allow_empty_body=False):
return content
def parse_json_object_from_request(request, allow_empty_body=False):
def parse_json_object_from_request(
request: Request, allow_empty_body: bool = False
) -> JsonDict:
"""Parse a JSON object from the body of a twisted HTTP request.
Args:
request: the twisted HTTP request.
allow_empty_body (bool): if True, an empty body will be accepted and
turned into an empty dict.
allow_empty_body: if True, an empty body will be accepted and turned into
an empty dict.
Raises:
SynapseError if the request body couldn't be decoded as JSON or
@ -493,14 +611,14 @@ def parse_json_object_from_request(request, allow_empty_body=False):
if allow_empty_body and content is None:
return {}
if type(content) != dict:
if not isinstance(content, dict):
message = "Content must be a JSON object."
raise SynapseError(400, message, errcode=Codes.BAD_JSON)
return content
def assert_params_in_dict(body, required):
def assert_params_in_dict(body: JsonDict, required: Iterable[str]) -> None:
absent = []
for k in required:
if k not in body:

2
synapse/rest/client/v1/room.py
View File

@ -754,7 +754,7 @@ class PublicRoomListRestServlet(TransactionRestServlet):
if server:
raise e
limit = parse_integer(request, "limit", 0)
limit: Optional[int] = parse_integer(request, "limit", 0)
since_token = parse_string(request, "since")
if limit == 0:

2
synapse/storage/databases/main/stats.py
View File

@ -650,7 +650,7 @@ class StatsStore(StateDeltasStore):
order_by: Optional[str] = UserSortOrder.USER_ID.value,
direction: Optional[str] = "f",
search_term: Optional[str] = None,
) -> Tuple[List[JsonDict], Dict[str, int]]:
) -> Tuple[List[JsonDict], int]:
"""Function to retrieve a paginated list of users and their uploaded local media
(size and number). This will return a json list of users and the
total number of users matching the filter criteria.

4
tests/rest/admin/test_media.py
View File

@ -261,7 +261,7 @@ class DeleteMediaByDateSizeTestCase(unittest.HomeserverTestCase):
self.assertEqual(400, int(channel.result["code"]), msg=channel.result["body"])
self.assertEqual(Codes.MISSING_PARAM, channel.json_body["errcode"])
self.assertEqual(
"Missing integer query parameter b'before_ts'", channel.json_body["error"]
"Missing integer query parameter 'before_ts'", channel.json_body["error"]
)
def test_invalid_parameter(self):
@ -303,7 +303,7 @@ class DeleteMediaByDateSizeTestCase(unittest.HomeserverTestCase):
self.assertEqual(400, int(channel.result["code"]), msg=channel.result["body"])
self.assertEqual(Codes.UNKNOWN, channel.json_body["errcode"])
self.assertEqual(
"Boolean query parameter b'keep_profiles' must be one of ['true', 'false']",
"Boolean query parameter 'keep_profiles' must be one of ['true', 'false']",
channel.json_body["error"],
)