143 lines
4.2 KiB
Python
143 lines
4.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Contains exceptions and error codes."""
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import logging
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class Codes(object):
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FORBIDDEN = "M_FORBIDDEN"
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BAD_JSON = "M_BAD_JSON"
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NOT_JSON = "M_NOT_JSON"
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USER_IN_USE = "M_USER_IN_USE"
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ROOM_IN_USE = "M_ROOM_IN_USE"
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BAD_PAGINATION = "M_BAD_PAGINATION"
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UNKNOWN = "M_UNKNOWN"
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NOT_FOUND = "M_NOT_FOUND"
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UNKNOWN_TOKEN = "M_UNKNOWN_TOKEN"
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LIMIT_EXCEEDED = "M_LIMIT_EXCEEDED"
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class CodeMessageException(Exception):
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"""An exception with integer code and message string attributes."""
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def __init__(self, code, msg):
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logging.error("%s: %s, %s", type(self).__name__, code, msg)
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super(CodeMessageException, self).__init__("%d: %s" % (code, msg))
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self.code = code
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self.msg = msg
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self.response_code_message = None
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def error_dict(self):
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return cs_error(self.msg)
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class SynapseError(CodeMessageException):
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"""A base error which can be caught for all synapse events."""
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def __init__(self, code, msg, errcode=Codes.UNKNOWN):
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"""Constructs a synapse error.
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Args:
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code (int): The integer error code (typically an HTTP response code)
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msg (str): The human-readable error message.
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err (str): The error code e.g 'M_FORBIDDEN'
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"""
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super(SynapseError, self).__init__(code, msg)
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self.errcode = errcode
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def error_dict(self):
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return cs_error(
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self.msg,
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self.errcode,
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)
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class RoomError(SynapseError):
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"""An error raised when a room event fails."""
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pass
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class RegistrationError(SynapseError):
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"""An error raised when a registration event fails."""
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pass
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class AuthError(SynapseError):
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"""An error raised when there was a problem authorising an event."""
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def __init__(self, *args, **kwargs):
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if "errcode" not in kwargs:
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kwargs["errcode"] = Codes.FORBIDDEN
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super(AuthError, self).__init__(*args, **kwargs)
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class EventStreamError(SynapseError):
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"""An error raised when there a problem with the event stream."""
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def __init__(self, *args, **kwargs):
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if "errcode" not in kwargs:
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kwargs["errcode"] = Codes.BAD_PAGINATION
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super(EventStreamError, self).__init__(*args, **kwargs)
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class LoginError(SynapseError):
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"""An error raised when there was a problem logging in."""
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pass
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class StoreError(SynapseError):
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"""An error raised when there was a problem storing some data."""
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pass
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class LimitExceededError(SynapseError):
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"""A client has sent too many requests and is being throttled.
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"""
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def __init__(self, code=429, msg="Too Many Requests", retry_after_ms=None,
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errcode=Codes.LIMIT_EXCEEDED):
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super(LimitExceededError, self).__init__(code, msg, errcode)
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self.retry_after_ms = retry_after_ms
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self.response_code_message = "Too Many Requests"
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def error_dict(self):
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return cs_error(
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self.msg,
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self.errcode,
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retry_after_ms=self.retry_after_ms,
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)
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def cs_exception(exception):
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if isinstance(exception, CodeMessageException):
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return exception.error_dict()
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else:
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logging.error("Unknown exception type: %s", type(exception))
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def cs_error(msg, code=Codes.UNKNOWN, **kwargs):
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""" Utility method for constructing an error response for client-server
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interactions.
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Args:
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msg (str): The error message.
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code (int): The error code.
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kwargs : Additional keys to add to the response.
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Returns:
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A dict representing the error response JSON.
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"""
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err = {"error": msg, "errcode": code}
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for key, value in kwargs.iteritems():
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err[key] = value
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return err
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