mirror of
https://mau.dev/maunium/synapse.git
synced 2024-08-22 18:25:34 +00:00
![Sorunome](/assets/img/avatar_default.png)
This PR aims to implement the knock feature as proposed in https://github.com/matrix-org/matrix-doc/pull/2403 Signed-off-by: Sorunome mail@sorunome.de Signed-off-by: Andrew Morgan andrewm@element.io
470 lines
14 KiB
Python
470 lines
14 KiB
Python
# 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.
|
|
|
|
""" This module contains base REST classes for constructing REST servlets. """
|
|
import logging
|
|
from typing import Dict, Iterable, List, Optional, overload
|
|
|
|
from typing_extensions import Literal
|
|
|
|
from twisted.web.server import Request
|
|
|
|
from synapse.api.errors import Codes, SynapseError
|
|
from synapse.util import json_decoder
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def parse_integer(request, name, default=None, required=False):
|
|
"""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.
|
|
|
|
Returns:
|
|
int|None: 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)
|
|
|
|
|
|
def parse_integer_from_args(args, name, default=None, required=False):
|
|
|
|
if not isinstance(name, bytes):
|
|
name = name.encode("ascii")
|
|
|
|
if name in args:
|
|
try:
|
|
return int(args[name][0])
|
|
except Exception:
|
|
message = "Query parameter %r must be an integer" % (name,)
|
|
raise SynapseError(400, message, errcode=Codes.INVALID_PARAM)
|
|
else:
|
|
if required:
|
|
message = "Missing integer query parameter %r" % (name,)
|
|
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
|
|
else:
|
|
return default
|
|
|
|
|
|
def parse_boolean(request, name, default=None, required=False):
|
|
"""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.
|
|
|
|
Returns:
|
|
bool|None: 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)
|
|
|
|
|
|
def parse_boolean_from_args(args, name, default=None, required=False):
|
|
|
|
if not isinstance(name, bytes):
|
|
name = name.encode("ascii")
|
|
|
|
if name in args:
|
|
try:
|
|
return {b"true": True, b"false": False}[args[name][0]]
|
|
except Exception:
|
|
message = (
|
|
"Boolean query parameter %r must be one of ['true', 'false']"
|
|
) % (name,)
|
|
raise SynapseError(400, message)
|
|
else:
|
|
if required:
|
|
message = "Missing boolean query parameter %r" % (name,)
|
|
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
|
|
else:
|
|
return default
|
|
|
|
|
|
@overload
|
|
def parse_bytes_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Literal[None] = None,
|
|
required: Literal[True] = True,
|
|
) -> bytes:
|
|
...
|
|
|
|
|
|
@overload
|
|
def parse_bytes_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[bytes] = None,
|
|
required: bool = False,
|
|
) -> Optional[bytes]:
|
|
...
|
|
|
|
|
|
def parse_bytes_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[bytes] = None,
|
|
required: bool = False,
|
|
) -> Optional[bytes]:
|
|
"""
|
|
Parse a string parameter as bytes 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. Must be bytes if encoding is None.
|
|
required: whether to raise a 400 SynapseError if the
|
|
parameter is absent, defaults to False.
|
|
Returns:
|
|
Bytes or the default value.
|
|
|
|
Raises:
|
|
SynapseError if the parameter is absent and required.
|
|
"""
|
|
name_bytes = name.encode("ascii")
|
|
|
|
if name_bytes in args:
|
|
return args[name_bytes][0]
|
|
elif required:
|
|
message = "Missing string query parameter %s" % (name,)
|
|
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
|
|
|
|
return default
|
|
|
|
|
|
def parse_string(
|
|
request: Request,
|
|
name: str,
|
|
default: Optional[str] = None,
|
|
required: bool = False,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
):
|
|
"""
|
|
Parse a string parameter from the request query string.
|
|
|
|
If encoding is not None, the content of the query param will be
|
|
decoded to Unicode using the encoding, otherwise it will be encoded
|
|
|
|
Args:
|
|
request: the twisted HTTP request.
|
|
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.
|
|
allowed_values: List of allowed values for the
|
|
string, or None if any value is allowed, defaults to None. Must be
|
|
the same type as name, if given.
|
|
encoding: The encoding to decode the string content with.
|
|
|
|
Returns:
|
|
A string value or the default.
|
|
|
|
Raises:
|
|
SynapseError if the parameter is absent and required, or if the
|
|
parameter is present, must be one of a list of allowed values and
|
|
is not one of those allowed values.
|
|
"""
|
|
args = request.args # type: Dict[bytes, List[bytes]] # type: ignore
|
|
return parse_string_from_args(
|
|
args, name, default, required, allowed_values, encoding
|
|
)
|
|
|
|
|
|
def _parse_string_value(
|
|
value: bytes,
|
|
allowed_values: Optional[Iterable[str]],
|
|
name: str,
|
|
encoding: str,
|
|
) -> str:
|
|
try:
|
|
value_str = value.decode(encoding)
|
|
except ValueError:
|
|
raise SynapseError(400, "Query parameter %r must be %s" % (name, encoding))
|
|
|
|
if allowed_values is not None and value_str not in allowed_values:
|
|
message = "Query parameter %r must be one of [%s]" % (
|
|
name,
|
|
", ".join(repr(v) for v in allowed_values),
|
|
)
|
|
raise SynapseError(400, message)
|
|
else:
|
|
return value_str
|
|
|
|
|
|
@overload
|
|
def parse_strings_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[List[str]] = None,
|
|
required: Literal[True] = True,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
) -> List[str]:
|
|
...
|
|
|
|
|
|
@overload
|
|
def parse_strings_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[List[str]] = None,
|
|
required: bool = False,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
) -> Optional[List[str]]:
|
|
...
|
|
|
|
|
|
def parse_strings_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[List[str]] = None,
|
|
required: bool = False,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
) -> Optional[List[str]]:
|
|
"""
|
|
Parse a string parameter from the request query string list.
|
|
|
|
The content of the query param will be decoded to Unicode using the encoding.
|
|
|
|
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.
|
|
allowed_values: List of allowed values for the
|
|
string, or None if any value is allowed, defaults to None.
|
|
encoding: The encoding to decode the string content with.
|
|
|
|
Returns:
|
|
A string value or the default.
|
|
|
|
Raises:
|
|
SynapseError if the parameter is absent and required, or if the
|
|
parameter is present, must be one of a list of allowed values and
|
|
is not one of those allowed values.
|
|
"""
|
|
name_bytes = name.encode("ascii")
|
|
|
|
if name_bytes in args:
|
|
values = args[name_bytes]
|
|
|
|
return [
|
|
_parse_string_value(value, allowed_values, name=name, encoding=encoding)
|
|
for value in values
|
|
]
|
|
else:
|
|
if required:
|
|
message = "Missing string query parameter %r" % (name,)
|
|
raise SynapseError(400, message, errcode=Codes.MISSING_PARAM)
|
|
|
|
return default
|
|
|
|
|
|
@overload
|
|
def parse_string_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[str] = None,
|
|
required: Literal[True] = True,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
) -> str:
|
|
...
|
|
|
|
|
|
@overload
|
|
def parse_string_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[str] = None,
|
|
required: bool = False,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
) -> Optional[str]:
|
|
...
|
|
|
|
|
|
def parse_string_from_args(
|
|
args: Dict[bytes, List[bytes]],
|
|
name: str,
|
|
default: Optional[str] = None,
|
|
required: bool = False,
|
|
allowed_values: Optional[Iterable[str]] = None,
|
|
encoding: str = "ascii",
|
|
) -> Optional[str]:
|
|
"""
|
|
Parse the string parameter from the request query string list
|
|
and return the first result.
|
|
|
|
The content of the query param will be decoded to Unicode using the encoding.
|
|
|
|
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.
|
|
allowed_values: List of allowed values for the
|
|
string, or None if any value is allowed, defaults to None. Must be
|
|
the same type as name, if given.
|
|
encoding: The encoding to decode the string content with.
|
|
|
|
Returns:
|
|
A string value or the default.
|
|
|
|
Raises:
|
|
SynapseError if the parameter is absent and required, or if the
|
|
parameter is present, must be one of a list of allowed values and
|
|
is not one of those allowed values.
|
|
"""
|
|
|
|
strings = parse_strings_from_args(
|
|
args,
|
|
name,
|
|
default=[default] if default is not None else None,
|
|
required=required,
|
|
allowed_values=allowed_values,
|
|
encoding=encoding,
|
|
)
|
|
|
|
if strings is None:
|
|
return None
|
|
|
|
return strings[0]
|
|
|
|
|
|
def parse_json_value_from_request(request, allow_empty_body=False):
|
|
"""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
|
|
|
|
Returns:
|
|
The JSON value.
|
|
|
|
Raises:
|
|
SynapseError if the request body couldn't be decoded as JSON.
|
|
"""
|
|
try:
|
|
content_bytes = request.content.read()
|
|
except Exception:
|
|
raise SynapseError(400, "Error reading JSON content.")
|
|
|
|
if not content_bytes and allow_empty_body:
|
|
return None
|
|
|
|
try:
|
|
content = json_decoder.decode(content_bytes.decode("utf-8"))
|
|
except Exception as e:
|
|
logger.warning("Unable to parse JSON: %s (%s)", e, content_bytes)
|
|
raise SynapseError(400, "Content not JSON.", errcode=Codes.NOT_JSON)
|
|
|
|
return content
|
|
|
|
|
|
def parse_json_object_from_request(request, allow_empty_body=False):
|
|
"""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.
|
|
|
|
Raises:
|
|
SynapseError if the request body couldn't be decoded as JSON or
|
|
if it wasn't a JSON object.
|
|
"""
|
|
content = parse_json_value_from_request(request, allow_empty_body=allow_empty_body)
|
|
|
|
if allow_empty_body and content is None:
|
|
return {}
|
|
|
|
if type(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):
|
|
absent = []
|
|
for k in required:
|
|
if k not in body:
|
|
absent.append(k)
|
|
|
|
if len(absent) > 0:
|
|
raise SynapseError(400, "Missing params: %r" % absent, Codes.MISSING_PARAM)
|
|
|
|
|
|
class RestServlet:
|
|
|
|
"""A Synapse REST Servlet.
|
|
|
|
An implementing class can either provide its own custom 'register' method,
|
|
or use the automatic pattern handling provided by the base class.
|
|
|
|
To use this latter, the implementing class instead provides a `PATTERN`
|
|
class attribute containing a pre-compiled regular expression. The automatic
|
|
register method will then use this method to register any of the following
|
|
instance methods associated with the corresponding HTTP method:
|
|
|
|
on_GET
|
|
on_PUT
|
|
on_POST
|
|
on_DELETE
|
|
|
|
Automatically handles turning CodeMessageExceptions thrown by these methods
|
|
into the appropriate HTTP response.
|
|
"""
|
|
|
|
def register(self, http_server):
|
|
""" Register this servlet with the given HTTP server. """
|
|
patterns = getattr(self, "PATTERNS", None)
|
|
if patterns:
|
|
for method in ("GET", "PUT", "POST", "DELETE"):
|
|
if hasattr(self, "on_%s" % (method,)):
|
|
servlet_classname = self.__class__.__name__
|
|
method_handler = getattr(self, "on_%s" % (method,))
|
|
http_server.register_paths(
|
|
method, patterns, method_handler, servlet_classname
|
|
)
|
|
|
|
else:
|
|
raise NotImplementedError("RestServlet must register something.")
|