54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
# Copyright 2014-2016 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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import logging
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import sys
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from typing import Container
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from synapse.util import check_dependencies
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logger = logging.getLogger(__name__)
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try:
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check_dependencies.check_requirements()
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except check_dependencies.DependencyException as e:
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sys.stderr.writelines(
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e.message # noqa: B306, DependencyException.message is a property
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)
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sys.exit(1)
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def check_bind_error(
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e: Exception, address: str, bind_addresses: Container[str]
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) -> None:
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"""
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This method checks an exception occurred while binding on 0.0.0.0.
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If :: is specified in the bind addresses a warning is shown.
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The exception is still raised otherwise.
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Binding on both 0.0.0.0 and :: causes an exception on Linux and macOS
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because :: binds on both IPv4 and IPv6 (as per RFC 3493).
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When binding on 0.0.0.0 after :: this can safely be ignored.
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Args:
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e: Exception that was caught.
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address: Address on which binding was attempted.
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bind_addresses: Addresses on which the service listens.
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"""
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if address == "0.0.0.0" and "::" in bind_addresses:
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logger.warning(
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"Failed to listen on 0.0.0.0, continuing because listening on [::]"
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)
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else:
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raise e
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