645 lines
20 KiB
Python
645 lines
20 KiB
Python
########################################################################
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# File name: errors.py
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# This file is part of: aioxmpp
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#
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# LICENSE
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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########################################################################
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"""
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:mod:`~aioxmpp.errors` --- Exception classes
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############################################
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Exception classes mapping to XMPP stream errors
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===============================================
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.. autoclass:: StreamError
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.. autoclass:: StreamErrorCondition
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Exception classes mapping to XMPP stanza errors
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===============================================
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.. autoclass:: StanzaError
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.. autoclass:: XMPPError
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.. currentmodule:: aioxmpp
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.. autoclass:: ErrorCondition
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.. autoclass:: XMPPAuthError
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.. autoclass:: XMPPModifyError
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.. autoclass:: XMPPCancelError
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.. autoclass:: XMPPWaitError
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.. autoclass:: XMPPContinueError
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.. currentmodule:: aioxmpp.errors
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.. autoclass:: ErroneousStanza
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Stream negotiation exceptions
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=============================
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.. autoclass:: StreamNegotiationFailure
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.. autoclass:: SecurityNegotiationFailure
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.. autoclass:: SASLUnavailable
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.. autoclass:: TLSFailure
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.. autoclass:: TLSUnavailable
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I18N exceptions
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===============
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.. autoclass:: UserError
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.. autoclass:: UserValueError
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Other exceptions
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================
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.. autoclass:: MultiOSError
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.. autoclass:: GatherError
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"""
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import enum
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import gettext
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import warnings
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from . import xso, i18n, structs
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from .utils import namespaces
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def format_error_text(
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condition,
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text=None,
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application_defined_condition=None):
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error_tag = xso.tag_to_str(condition.value)
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if application_defined_condition is not None:
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error_tag += "/{}".format(
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xso.tag_to_str(application_defined_condition.TAG)
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)
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if text:
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error_tag += " ({!r})".format(text)
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return error_tag
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class ErrorCondition(structs.CompatibilityMixin, xso.XSOEnumMixin, enum.Enum):
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"""
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Enumeration to represent a :rfc:`6120` stanza error condition. Please
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see :rfc:`6120`, section 8.3.3, for the semantics of the individual
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conditions.
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.. versionadded:: 0.10
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.. attribute:: BAD_REQUEST
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:annotation: = namespaces.stanzas, "bad-request"
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.. attribute:: CONFLICT
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:annotation: = namespaces.stanzas, "conflict"
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.. attribute:: FEATURE_NOT_IMPLEMENTED
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:annotation: = namespaces.stanzas, "feature-not-implemented"
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.. attribute:: FORBIDDEN
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:annotation: = namespaces.stanzas, "forbidden"
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.. attribute:: GONE
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:annotation: = namespaces.stanzas, "gone"
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.. attribute:: xso_class
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.. attribute:: new_address
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The text content of the ``<gone/>`` element represtenting the
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URI at which the entity can now be found.
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May be :data:`None` if there is no such URI.
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.. attribute:: INTERNAL_SERVER_ERROR
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:annotation: = namespaces.stanzas, "internal-server-error"
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.. attribute:: ITEM_NOT_FOUND
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:annotation: = namespaces.stanzas, "item-not-found"
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.. attribute:: JID_MALFORMED
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:annotation: = namespaces.stanzas, "jid-malformed"
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.. attribute:: NOT_ACCEPTABLE
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:annotation: = namespaces.stanzas, "not-acceptable"
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.. attribute:: NOT_ALLOWED
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:annotation: = namespaces.stanzas, "not-allowed"
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.. attribute:: NOT_AUTHORIZED
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:annotation: = namespaces.stanzas, "not-authorized"
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.. attribute:: POLICY_VIOLATION
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:annotation: = namespaces.stanzas, "policy-violation"
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.. attribute:: RECIPIENT_UNAVAILABLE
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:annotation: = namespaces.stanzas, "recipient-unavailable"
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.. attribute:: REDIRECT
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:annotation: = namespaces.stanzas, "redirect"
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.. attribute:: xso_class
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.. attribute:: new_address
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The text content of the ``<redirect/>`` element represtenting
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the URI at which the entity can currently be found.
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May be :data:`None` if there is no such URI.
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.. attribute:: REGISTRATION_REQUIRED
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:annotation: = namespaces.stanzas, "registration-required"
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.. attribute:: REMOTE_SERVER_NOT_FOUND
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:annotation: = namespaces.stanzas, "remote-server-not-found"
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.. attribute:: REMOTE_SERVER_TIMEOUT
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:annotation: = namespaces.stanzas, "remote-server-timeout"
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.. attribute:: RESOURCE_CONSTRAINT
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:annotation: = namespaces.stanzas, "resource-constraint"
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.. attribute:: SERVICE_UNAVAILABLE
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:annotation: = namespaces.stanzas, "service-unavailable"
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.. attribute:: SUBSCRIPTION_REQUIRED
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:annotation: = namespaces.stanzas, "subscription-required"
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.. attribute:: UNDEFINED_CONDITION
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:annotation: = namespaces.stanzas, "undefined-condition"
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.. attribute:: UNEXPECTED_REQUEST
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:annotation: = namespaces.stanzas, "unexpected-request"
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"""
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BAD_REQUEST = (namespaces.stanzas, "bad-request")
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CONFLICT = (namespaces.stanzas, "conflict")
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FEATURE_NOT_IMPLEMENTED = (namespaces.stanzas, "feature-not-implemented")
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FORBIDDEN = (namespaces.stanzas, "forbidden")
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GONE = (namespaces.stanzas, "gone")
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INTERNAL_SERVER_ERROR = (namespaces.stanzas, "internal-server-error")
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ITEM_NOT_FOUND = (namespaces.stanzas, "item-not-found")
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JID_MALFORMED = (namespaces.stanzas, "jid-malformed")
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NOT_ACCEPTABLE = (namespaces.stanzas, "not-acceptable")
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NOT_ALLOWED = (namespaces.stanzas, "not-allowed")
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NOT_AUTHORIZED = (namespaces.stanzas, "not-authorized")
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POLICY_VIOLATION = (namespaces.stanzas, "policy-violation")
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RECIPIENT_UNAVAILABLE = (namespaces.stanzas, "recipient-unavailable")
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REDIRECT = (namespaces.stanzas, "redirect")
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REGISTRATION_REQUIRED = (namespaces.stanzas, "registration-required")
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REMOTE_SERVER_NOT_FOUND = (namespaces.stanzas, "remote-server-not-found")
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REMOTE_SERVER_TIMEOUT = (namespaces.stanzas, "remote-server-timeout")
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RESOURCE_CONSTRAINT = (namespaces.stanzas, "resource-constraint")
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SERVICE_UNAVAILABLE = (namespaces.stanzas, "service-unavailable")
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SUBSCRIPTION_REQUIRED = (namespaces.stanzas, "subscription-required")
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UNDEFINED_CONDITION = (namespaces.stanzas, "undefined-condition")
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UNEXPECTED_REQUEST = (namespaces.stanzas, "unexpected-request")
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ErrorCondition.GONE.xso_class.new_address = xso.Text()
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ErrorCondition.REDIRECT.xso_class.new_address = xso.Text()
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class StreamErrorCondition(structs.CompatibilityMixin,
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xso.XSOEnumMixin,
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enum.Enum):
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"""
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Enumeration to represent a :rfc:`6120` stream error condition. Please
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see :rfc:`6120`, section 4.9.3, for the semantics of the individual
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conditions.
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.. versionadded:: 0.10
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.. attribute:: BAD_FORMAT
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:annotation: = (namespaces.streams, "bad-format")
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.. attribute:: BAD_NAMESPACE_PREFIX
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:annotation: = (namespaces.streams, "bad-namespace-prefix")
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.. attribute:: CONFLICT
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:annotation: = (namespaces.streams, "conflict")
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.. attribute:: CONNECTION_TIMEOUT
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:annotation: = (namespaces.streams, "connection-timeout")
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.. attribute:: HOST_GONE
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:annotation: = (namespaces.streams, "host-gone")
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.. attribute:: HOST_UNKNOWN
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:annotation: = (namespaces.streams, "host-unknown")
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.. attribute:: IMPROPER_ADDRESSING
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:annotation: = (namespaces.streams, "improper-addressing")
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.. attribute:: INTERNAL_SERVER_ERROR
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:annotation: = (namespaces.streams, "internal-server-error")
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.. attribute:: INVALID_FROM
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:annotation: = (namespaces.streams, "invalid-from")
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.. attribute:: INVALID_NAMESPACE
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:annotation: = (namespaces.streams, "invalid-namespace")
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.. attribute:: INVALID_XML
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:annotation: = (namespaces.streams, "invalid-xml")
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.. attribute:: NOT_AUTHORIZED
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:annotation: = (namespaces.streams, "not-authorized")
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.. attribute:: NOT_WELL_FORMED
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:annotation: = (namespaces.streams, "not-well-formed")
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.. attribute:: POLICY_VIOLATION
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:annotation: = (namespaces.streams, "policy-violation")
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.. attribute:: REMOTE_CONNECTION_FAILED
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:annotation: = (namespaces.streams, "remote-connection-failed")
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.. attribute:: RESET
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:annotation: = (namespaces.streams, "reset")
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.. attribute:: RESOURCE_CONSTRAINT
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:annotation: = (namespaces.streams, "resource-constraint")
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.. attribute:: RESTRICTED_XML
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:annotation: = (namespaces.streams, "restricted-xml")
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.. attribute:: SEE_OTHER_HOST
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:annotation: = (namespaces.streams, "see-other-host")
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.. attribute:: SYSTEM_SHUTDOWN
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:annotation: = (namespaces.streams, "system-shutdown")
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.. attribute:: UNDEFINED_CONDITION
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:annotation: = (namespaces.streams, "undefined-condition")
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.. attribute:: UNSUPPORTED_ENCODING
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:annotation: = (namespaces.streams, "unsupported-encoding")
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.. attribute:: UNSUPPORTED_FEATURE
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:annotation: = (namespaces.streams, "unsupported-feature")
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.. attribute:: UNSUPPORTED_STANZA_TYPE
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:annotation: = (namespaces.streams, "unsupported-stanza-type")
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.. attribute:: UNSUPPORTED_VERSION
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:annotation: = (namespaces.streams, "unsupported-version")
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"""
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BAD_FORMAT = (namespaces.streams, "bad-format")
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BAD_NAMESPACE_PREFIX = (namespaces.streams, "bad-namespace-prefix")
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CONFLICT = (namespaces.streams, "conflict")
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CONNECTION_TIMEOUT = (namespaces.streams, "connection-timeout")
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HOST_GONE = (namespaces.streams, "host-gone")
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HOST_UNKNOWN = (namespaces.streams, "host-unknown")
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IMPROPER_ADDRESSING = (namespaces.streams, "improper-addressing")
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INTERNAL_SERVER_ERROR = (namespaces.streams, "internal-server-error")
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INVALID_FROM = (namespaces.streams, "invalid-from")
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INVALID_NAMESPACE = (namespaces.streams, "invalid-namespace")
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INVALID_XML = (namespaces.streams, "invalid-xml")
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NOT_AUTHORIZED = (namespaces.streams, "not-authorized")
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NOT_WELL_FORMED = (namespaces.streams, "not-well-formed")
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POLICY_VIOLATION = (namespaces.streams, "policy-violation")
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REMOTE_CONNECTION_FAILED = (namespaces.streams, "remote-connection-failed")
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RESET = (namespaces.streams, "reset")
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RESOURCE_CONSTRAINT = (namespaces.streams, "resource-constraint")
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RESTRICTED_XML = (namespaces.streams, "restricted-xml")
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SEE_OTHER_HOST = (namespaces.streams, "see-other-host")
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SYSTEM_SHUTDOWN = (namespaces.streams, "system-shutdown")
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UNDEFINED_CONDITION = (namespaces.streams, "undefined-condition")
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UNSUPPORTED_ENCODING = (namespaces.streams, "unsupported-encoding")
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UNSUPPORTED_FEATURE = (namespaces.streams, "unsupported-feature")
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UNSUPPORTED_STANZA_TYPE = (namespaces.streams, "unsupported-stanza-type")
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UNSUPPORTED_VERSION = (namespaces.streams, "unsupported-version")
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StreamErrorCondition.SEE_OTHER_HOST.xso_class.new_address = xso.Text()
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class StreamError(ConnectionError):
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def __init__(self, condition, text=None):
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if not isinstance(condition, StreamErrorCondition):
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condition = StreamErrorCondition(condition)
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warnings.warn(
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"as of aioxmpp 1.0, stream error conditions must be members "
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"of the aioxmpp.errors.StreamErrorCondition enumeration",
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DeprecationWarning,
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stacklevel=2,
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)
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super().__init__("stream error: {}".format(
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format_error_text(condition, text))
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)
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self.condition = condition
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self.text = text
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class StanzaError(Exception):
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pass
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class XMPPError(StanzaError):
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"""
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Exception representing an error defined in the XMPP protocol.
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:param condition: The :rfc:`6120` defined error condition as enumeration
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member or :class:`aioxmpp.xso.XSO`
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:type condition: :class:`aioxmpp.ErrorCondition` or
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:class:`aioxmpp.xso.XSO`
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:param text: Optional human-readable text explaining the error
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:type text: :class:`str`
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:param application_defined_condition: Object describing the error in more
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detail
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:type application_defined_condition: :class:`aioxmpp.xso.XSO`
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.. versionchanged:: 0.10
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As of 0.10, `condition` should either be a
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:class:`aioxmpp.ErrorCondition` enumeration member or an XSO
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representing one of the error conditions.
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For compatibility, namespace-localpart tuples indicating the tag of
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the defined error condition are still accepted.
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.. deprecated:: 0.10
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Starting with aioxmpp 1.0, namespace-localpart tuples will not be
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accepted anymore. See the changelog for notes on the transition.
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.. attribute:: condition_obj
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The :class:`aioxmpp.XSO` which represents the error condition.
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.. versionadded:: 0.10
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.. autoattribute:: condition
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.. attribute:: text
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Optional human-readable text describing the error further.
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This is :data:`None` if the text is omitted.
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.. attribute:: application_defined_condition
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Optional :class:`aioxmpp.XSO` which further defines the error
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condition.
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Relevant subclasses:
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.. autosummary::
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aioxmpp.XMPPAuthError
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aioxmpp.XMPPModifyError
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aioxmpp.XMPPCancelError
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aioxmpp.XMPPContinueError
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aioxmpp.XMPPWaitError
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"""
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TYPE = structs.ErrorType.CANCEL
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def __init__(self,
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condition,
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text=None,
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application_defined_condition=None):
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if not isinstance(condition, (ErrorCondition, xso.XSO)):
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condition = ErrorCondition(condition)
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warnings.warn(
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"as of aioxmpp 1.0, error conditions must be members of the "
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"aioxmpp.ErrorCondition enumeration",
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DeprecationWarning,
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stacklevel=2,
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)
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super().__init__(format_error_text(
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condition.enum_member,
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text=text,
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application_defined_condition=application_defined_condition))
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self.condition_obj = condition.to_xso()
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self.text = text
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self.application_defined_condition = application_defined_condition
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@property
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def condition(self):
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"""
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:class:`aioxmpp.ErrorCondition` enumeration member representing the
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error condition.
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"""
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return self.condition_obj.enum_member
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class XMPPWarning(XMPPError, UserWarning):
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TYPE = structs.ErrorType.CONTINUE
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class XMPPAuthError(XMPPError, PermissionError):
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TYPE = structs.ErrorType.AUTH
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class XMPPModifyError(XMPPError, ValueError):
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TYPE = structs.ErrorType.MODIFY
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class XMPPCancelError(XMPPError):
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TYPE = structs.ErrorType.CANCEL
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class XMPPWaitError(XMPPError):
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TYPE = structs.ErrorType.WAIT
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class XMPPContinueError(XMPPWarning):
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TYPE = structs.ErrorType.CONTINUE
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class ErroneousStanza(StanzaError):
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"""
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This exception is thrown into listeners for IQ responses by
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:class:`aioxmpp.stream.StanzaStream` if a response for an IQ was received,
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but could not be decoded (due to malformed or unsupported payload).
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.. attribute:: partial_obj
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Contains the partially decoded stanza XSO. Do not rely on any members
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except those representing XML attributes (:attr:`~.StanzaBase.to`,
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:attr:`~.StanzaBase.from_`, :attr:`~.StanzaBase.type_`).
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"""
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def __init__(self, partial_obj):
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super().__init__("erroneous stanza received: {!r}".format(
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partial_obj))
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self.partial_obj = partial_obj
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class StreamNegotiationFailure(ConnectionError):
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pass
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class SecurityNegotiationFailure(StreamNegotiationFailure):
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def __init__(self, xmpp_error,
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kind="Security negotiation failure",
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text=None):
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msg = "{}: {}".format(kind, xmpp_error)
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if text:
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msg += " ('{}')".format(text)
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super().__init__(msg)
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self.xmpp_error = xmpp_error
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self.text = text
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class SASLUnavailable(SecurityNegotiationFailure):
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# we use this to tell the Client that SASL has not been available at all,
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# or that we could not agree on mechanisms.
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# it might be helpful to notify the peer about this before dying.
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pass
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class TLSFailure(SecurityNegotiationFailure):
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def __init__(self, xmpp_error, text=None):
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super().__init__(xmpp_error, text=text, kind="TLS failure")
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class TLSUnavailable(TLSFailure):
|
|
pass
|
|
|
|
|
|
class UserError(Exception):
|
|
"""
|
|
An exception subclass, which should be used as a mix-in.
|
|
|
|
It is intended to be used for exceptions which may be user-facing, such as
|
|
connection errors, value validation issues and the like.
|
|
|
|
`localizable_string` must be a :class:`.i18n.LocalizableString`
|
|
instance. The `args` and `kwargs` will be passed to
|
|
:class:`.LocalizableString.localize` when either :func:`str` is called on
|
|
the :class:`UserError` or :meth:`localize` is called.
|
|
|
|
The :func:`str` is created using the default
|
|
:class:`~.i18n.LocalizingFormatter` and a :class:`gettext.NullTranslations`
|
|
instance. The point in time at which the default localizing formatter is
|
|
created is unspecified.
|
|
|
|
.. automethod:: localize
|
|
|
|
"""
|
|
|
|
DEFAULT_FORMATTER = i18n.LocalizingFormatter()
|
|
DEFAULT_TRANSLATIONS = gettext.NullTranslations()
|
|
|
|
def __init__(self, localizable_string, *args, **kwargs):
|
|
super().__init__()
|
|
self._str = localizable_string.localize(
|
|
self.DEFAULT_FORMATTER,
|
|
self.DEFAULT_TRANSLATIONS,
|
|
*args, **kwargs)
|
|
self.localizable_string = localizable_string
|
|
self.args = args
|
|
self.kwargs = kwargs
|
|
|
|
def __str__(self):
|
|
return str(self._str)
|
|
|
|
def localize(self, formatter, translator):
|
|
"""
|
|
Return a localized version of the `localizable_string` passed to the
|
|
constructor. It is formatted using the `formatter` with the `args` and
|
|
`kwargs` passed to the constructor of :class:`UserError`.
|
|
"""
|
|
return self.localizable_string.localize(
|
|
formatter,
|
|
translator,
|
|
*self.args,
|
|
**self.kwargs
|
|
)
|
|
|
|
|
|
class UserValueError(UserError, ValueError):
|
|
"""
|
|
This is a :class:`ValueError` with :class:`UserError` mixed in.
|
|
"""
|
|
|
|
|
|
class MultiOSError(OSError):
|
|
"""
|
|
Describe an error situation which has been caused by the sequential
|
|
occurrence of multiple other `exceptions`.
|
|
|
|
The `message` shall be descriptive and will be prepended to a concatenation
|
|
of the error messages of the given `exceptions`.
|
|
"""
|
|
|
|
def __init__(self, message, exceptions):
|
|
flattened_exceptions = []
|
|
for exc in exceptions:
|
|
if hasattr(exc, "exceptions"):
|
|
flattened_exceptions.extend(exc.exceptions)
|
|
else:
|
|
flattened_exceptions.append(exc)
|
|
|
|
super().__init__(
|
|
"{}: multiple errors: {}".format(
|
|
message,
|
|
", ".join(map(str, flattened_exceptions))
|
|
)
|
|
)
|
|
self.exceptions = flattened_exceptions
|
|
|
|
|
|
class GatherError(RuntimeError):
|
|
"""
|
|
Describe an error situation which has been caused by the occurrence
|
|
of multiple other `exceptions`.
|
|
|
|
The `message` shall be descriptive and will be prepended to a concatenation
|
|
of the error messages of the given `exceptions`.
|
|
"""
|
|
|
|
def __init__(self, message, exceptions):
|
|
flattened_exceptions = []
|
|
for exc in exceptions:
|
|
if hasattr(exc, "exceptions"):
|
|
flattened_exceptions.extend(exc.exceptions)
|
|
else:
|
|
flattened_exceptions.append(exc)
|
|
|
|
super().__init__(
|
|
"{}: multiple errors: {}".format(
|
|
message,
|
|
", ".join(map(str, flattened_exceptions))
|
|
)
|
|
)
|
|
self.exceptions = flattened_exceptions
|