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91 lines
2.9 KiB
91 lines
2.9 KiB
# Copyright 2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"). You
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# may not use this file except in compliance with the License. A copy of
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# the License is located at
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#
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# http://aws.amazon.com/apache2.0/
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#
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# or in the "license" file accompanying this file. This file is
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# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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# ANY KIND, either express or implied. See the License for the specific
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# language governing permissions and limitations under the License.
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import inspect
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import sys
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import os
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import errno
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import socket
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from botocore.compat import six
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if sys.platform.startswith('win'):
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def rename_file(current_filename, new_filename):
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try:
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os.remove(new_filename)
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except OSError as e:
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if not e.errno == errno.ENOENT:
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# We only want to a ignore trying to remove
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# a file that does not exist. If it fails
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# for any other reason we should be propagating
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# that exception.
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raise
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os.rename(current_filename, new_filename)
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else:
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rename_file = os.rename
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if six.PY3:
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def accepts_kwargs(func):
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# In python3.4.1, there's backwards incompatible
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# changes when using getargspec with functools.partials.
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return inspect.getfullargspec(func)[2]
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# In python3, socket.error is OSError, which is too general
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# for what we want (i.e FileNotFoundError is a subclass of OSError).
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# In py3 all the socket related errors are in a newly created
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# ConnectionError
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SOCKET_ERROR = ConnectionError
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MAXINT = None
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else:
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def accepts_kwargs(func):
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return inspect.getargspec(func)[2]
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SOCKET_ERROR = socket.error
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MAXINT = sys.maxint
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def seekable(fileobj):
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"""Backwards compat function to determine if a fileobj is seekable
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:param fileobj: The file-like object to determine if seekable
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:returns: True, if seekable. False, otherwise.
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"""
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# If the fileobj has a seekable attr, try calling the seekable()
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# method on it.
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if hasattr(fileobj, 'seekable'):
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return fileobj.seekable()
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# If there is no seekable attr, check if the object can be seeked
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# or telled. If it can, try to seek to the current position.
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elif hasattr(fileobj, 'seek') and hasattr(fileobj, 'tell'):
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try:
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fileobj.seek(0, 1)
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return True
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except (OSError, IOError):
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# If an io related error was thrown then it is not seekable.
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return False
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# Else, the fileobj is not seekable
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return False
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def readable(fileobj):
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"""Determines whether or not a file-like object is readable.
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:param fileobj: The file-like object to determine if readable
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:returns: True, if readable. False otherwise.
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"""
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if hasattr(fileobj, 'readable'):
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return fileobj.readable()
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return hasattr(fileobj, 'read')
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