diff options
Diffstat (limited to 'synapse/http/servlet.py')
| -rw-r--r-- | synapse/http/servlet.py | 220 |
1 files changed, 169 insertions, 51 deletions
diff --git a/synapse/http/servlet.py b/synapse/http/servlet.py index cf45b6623b..732a1e6aeb 100644 --- a/synapse/http/servlet.py +++ b/synapse/http/servlet.py @@ -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 + + 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: + An int value or the default. - if not isinstance(name, bytes): - name = name.encode("ascii") + 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 in args: + 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". """ + args: Mapping[bytes, Sequence[bytes]] = request.args # type: ignore + return parse_boolean_from_args(args, name, default, required) - return parse_boolean_from_args(request.args, name, default, required) +@overload +def parse_boolean_from_args( + args: Mapping[bytes, Sequence[bytes]], + name: str, + default: bool, +) -> bool: + ... -def parse_boolean_from_args(args, name, default=None, required=False): - if not isinstance(name, bytes): - name = name.encode("ascii") +@overload +def parse_boolean_from_args( + args: Mapping[bytes, Sequence[bytes]], + name: str, + *, + required: Literal[True], +) -> bool: + ... + - if name in args: +@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: |