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- # -*- coding: utf-8 -*-
- # Copyright 2014 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.
- """Contains exceptions and error codes."""
- import logging
- logger = logging.getLogger(__name__)
- class Codes(object):
- UNAUTHORIZED = "M_UNAUTHORIZED"
- FORBIDDEN = "M_FORBIDDEN"
- BAD_JSON = "M_BAD_JSON"
- NOT_JSON = "M_NOT_JSON"
- USER_IN_USE = "M_USER_IN_USE"
- ROOM_IN_USE = "M_ROOM_IN_USE"
- BAD_PAGINATION = "M_BAD_PAGINATION"
- UNKNOWN = "M_UNKNOWN"
- NOT_FOUND = "M_NOT_FOUND"
- UNKNOWN_TOKEN = "M_UNKNOWN_TOKEN"
- LIMIT_EXCEEDED = "M_LIMIT_EXCEEDED"
- CAPTCHA_NEEDED = "M_CAPTCHA_NEEDED"
- CAPTCHA_INVALID = "M_CAPTCHA_INVALID"
- TOO_LARGE = "M_TOO_LARGE"
- class CodeMessageException(Exception):
- """An exception with integer code and message string attributes."""
- def __init__(self, code, msg):
- logger.info("%s: %s, %s", type(self).__name__, code, msg)
- super(CodeMessageException, self).__init__("%d: %s" % (code, msg))
- self.code = code
- self.msg = msg
- self.response_code_message = None
- def error_dict(self):
- return cs_error(self.msg)
- class SynapseError(CodeMessageException):
- """A base error which can be caught for all synapse events."""
- def __init__(self, code, msg, errcode=Codes.UNKNOWN):
- """Constructs a synapse error.
- Args:
- code (int): The integer error code (an HTTP response code)
- msg (str): The human-readable error message.
- err (str): The error code e.g 'M_FORBIDDEN'
- """
- super(SynapseError, self).__init__(code, msg)
- self.errcode = errcode
- def error_dict(self):
- return cs_error(
- self.msg,
- self.errcode,
- )
- class RoomError(SynapseError):
- """An error raised when a room event fails."""
- pass
- class RegistrationError(SynapseError):
- """An error raised when a registration event fails."""
- pass
- class AuthError(SynapseError):
- """An error raised when there was a problem authorising an event."""
- def __init__(self, *args, **kwargs):
- if "errcode" not in kwargs:
- kwargs["errcode"] = Codes.FORBIDDEN
- super(AuthError, self).__init__(*args, **kwargs)
- class EventStreamError(SynapseError):
- """An error raised when there a problem with the event stream."""
- def __init__(self, *args, **kwargs):
- if "errcode" not in kwargs:
- kwargs["errcode"] = Codes.BAD_PAGINATION
- super(EventStreamError, self).__init__(*args, **kwargs)
- class LoginError(SynapseError):
- """An error raised when there was a problem logging in."""
- pass
- class StoreError(SynapseError):
- """An error raised when there was a problem storing some data."""
- pass
- class InvalidCaptchaError(SynapseError):
- def __init__(self, code=400, msg="Invalid captcha.", error_url=None,
- errcode=Codes.CAPTCHA_INVALID):
- super(InvalidCaptchaError, self).__init__(code, msg, errcode)
- self.error_url = error_url
- def error_dict(self):
- return cs_error(
- self.msg,
- self.errcode,
- error_url=self.error_url,
- )
- class LimitExceededError(SynapseError):
- """A client has sent too many requests and is being throttled.
- """
- def __init__(self, code=429, msg="Too Many Requests", retry_after_ms=None,
- errcode=Codes.LIMIT_EXCEEDED):
- super(LimitExceededError, self).__init__(code, msg, errcode)
- self.retry_after_ms = retry_after_ms
- self.response_code_message = "Too Many Requests"
- def error_dict(self):
- return cs_error(
- self.msg,
- self.errcode,
- retry_after_ms=self.retry_after_ms,
- )
- def cs_exception(exception):
- if isinstance(exception, CodeMessageException):
- return exception.error_dict()
- else:
- logger.error("Unknown exception type: %s", type(exception))
- return {}
- def cs_error(msg, code=Codes.UNKNOWN, **kwargs):
- """ Utility method for constructing an error response for client-server
- interactions.
- Args:
- msg (str): The error message.
- code (int): The error code.
- kwargs : Additional keys to add to the response.
- Returns:
- A dict representing the error response JSON.
- """
- err = {"error": msg, "errcode": code}
- for key, value in kwargs.iteritems():
- err[key] = value
- return err
- class FederationError(RuntimeError):
- """ This class is used to inform remote home servers about erroneous
- PDUs they sent us.
- FATAL: The remote server could not interpret the source event.
- (e.g., it was missing a required field)
- ERROR: The remote server interpreted the event, but it failed some other
- check (e.g. auth)
- WARN: The remote server accepted the event, but believes some part of it
- is wrong (e.g., it referred to an invalid event)
- """
- def __init__(self, level, code, reason, affected, source=None):
- if level not in ["FATAL", "ERROR", "WARN"]:
- raise ValueError("Level is not valid: %s" % (level,))
- self.level = level
- self.code = code
- self.reason = reason
- self.affected = affected
- self.source = source
- msg = "%s %s: %s" % (level, code, reason,)
- super(FederationError, self).__init__(msg)
- def get_dict(self):
- return {
- "level": self.level,
- "code": self.code,
- "reason": self.reason,
- "affected": self.affected,
- "source": self.source if self.source else self.affected,
- }
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