63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Properties of an object stored within a bucket.
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"""
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from nova.exception import NotFound, NotAuthorized
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import os
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import nova.crypto
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class Object(object):
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def __init__(self, bucket, key):
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""" wrapper class of an existing key """
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self.bucket = bucket
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self.key = key
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self.path = bucket._object_path(key)
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if not os.path.isfile(self.path):
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raise NotFound
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def __repr__(self):
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return "<Object %s/%s>" % (self.bucket, self.key)
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@property
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def md5(self):
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""" computes the MD5 of the contents of file """
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with open(self.path, "r") as f:
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return nova.crypto.compute_md5(f)
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@property
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def mtime(self):
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""" mtime of file """
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return os.path.getmtime(self.path)
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def read(self):
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""" read all contents of key into memory and return """
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return self.file.read()
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@property
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def file(self):
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""" return a file object for the key """
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return open(self.path, 'rb')
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def delete(self):
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""" deletes the file """
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os.unlink(self.path)
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