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# Copyright 2020, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Stream Exceptions.
"""
# Note: request.connection.write/read are used in this module, even though
# mod_python document says that they should be used only in connection
# handlers. Unfortunately, we have no other options. For example,
# request.write/read are not suitable because they don't allow direct raw bytes
# writing/reading.
# Exceptions
class ConnectionTerminatedException(Exception):
"""This exception will be raised when a connection is terminated
unexpectedly.
"""
pass
class InvalidFrameException(ConnectionTerminatedException):
"""This exception will be raised when we received an invalid frame we
cannot parse.
"""
pass
class BadOperationException(Exception):
"""This exception will be raised when send_message() is called on
server-terminated connection or receive_message() is called on
client-terminated connection.
"""
pass
class UnsupportedFrameException(Exception):
"""This exception will be raised when we receive a frame with flag, opcode
we cannot handle. Handlers can just catch and ignore this exception and
call receive_message() again to continue processing the next frame.
"""
pass
class InvalidUTF8Exception(Exception):
"""This exception will be raised when we receive a text frame which
contains invalid UTF-8 strings.
"""
pass
# vi:sts=4 sw=4 et