311 lines
11 KiB
Python
311 lines
11 KiB
Python
# Copyright (c) 2012 Mitch Garnaat http://garnaat.org/
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# Copyright (c) 2012 Amazon.com, Inc. or its affiliates. All Rights Reserved
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish, dis-
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# tribute, sublicense, and/or sell copies of the Software, and to permit
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# persons to whom the Software is furnished to do so, subject to the fol-
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# lowing conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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from boto.compat import six
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class Rule(object):
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"""
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A Lifecycle rule for an S3 bucket.
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:ivar id: Unique identifier for the rule. The value cannot be longer
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than 255 characters. This value is optional. The server will
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generate a unique value for the rule if no value is provided.
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:ivar prefix: Prefix identifying one or more objects to which the
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rule applies. If prefix is not provided, Boto generates a default
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prefix which will match all objects.
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:ivar status: If 'Enabled', the rule is currently being applied.
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If 'Disabled', the rule is not currently being applied.
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:ivar expiration: An instance of `Expiration`. This indicates
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the lifetime of the objects that are subject to the rule.
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:ivar transition: An instance of `Transition`. This indicates
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when to transition to a different storage class.
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"""
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def __init__(self, id=None, prefix=None, status=None, expiration=None,
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transition=None):
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self.id = id
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self.prefix = '' if prefix is None else prefix
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self.status = status
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if isinstance(expiration, six.integer_types):
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# retain backwards compatibility???
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self.expiration = Expiration(days=expiration)
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else:
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# None or object
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self.expiration = expiration
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# retain backwards compatibility
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if isinstance(transition, Transition):
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self.transition = Transitions()
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self.transition.append(transition)
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elif transition:
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self.transition = transition
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else:
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self.transition = Transitions()
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def __repr__(self):
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return '<Rule: %s>' % self.id
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def startElement(self, name, attrs, connection):
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if name == 'Transition':
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return self.transition
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elif name == 'Expiration':
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self.expiration = Expiration()
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return self.expiration
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return None
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def endElement(self, name, value, connection):
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if name == 'ID':
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self.id = value
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elif name == 'Prefix':
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self.prefix = value
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elif name == 'Status':
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self.status = value
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else:
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setattr(self, name, value)
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def to_xml(self):
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s = '<Rule>'
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if self.id is not None:
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s += '<ID>%s</ID>' % self.id
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s += '<Prefix>%s</Prefix>' % self.prefix
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s += '<Status>%s</Status>' % self.status
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if self.expiration is not None:
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s += self.expiration.to_xml()
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if self.transition is not None:
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s += self.transition.to_xml()
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s += '</Rule>'
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return s
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class Expiration(object):
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"""
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When an object will expire.
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:ivar days: The number of days until the object expires
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:ivar date: The date when the object will expire. Must be
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in ISO 8601 format.
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"""
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def __init__(self, days=None, date=None):
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self.days = days
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self.date = date
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def startElement(self, name, attrs, connection):
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return None
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def endElement(self, name, value, connection):
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if name == 'Days':
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self.days = int(value)
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elif name == 'Date':
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self.date = value
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def __repr__(self):
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if self.days is None:
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how_long = "on: %s" % self.date
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else:
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how_long = "in: %s days" % self.days
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return '<Expiration: %s>' % how_long
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def to_xml(self):
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s = '<Expiration>'
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if self.days is not None:
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s += '<Days>%s</Days>' % self.days
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elif self.date is not None:
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s += '<Date>%s</Date>' % self.date
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s += '</Expiration>'
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return s
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class Transition(object):
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"""
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A transition to a different storage class.
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:ivar days: The number of days until the object should be moved.
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:ivar date: The date when the object should be moved. Should be
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in ISO 8601 format.
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:ivar storage_class: The storage class to transition to. Valid
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values are GLACIER, STANDARD_IA.
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"""
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def __init__(self, days=None, date=None, storage_class=None):
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self.days = days
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self.date = date
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self.storage_class = storage_class
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def __repr__(self):
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if self.days is None:
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how_long = "on: %s" % self.date
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else:
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how_long = "in: %s days" % self.days
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return '<Transition: %s, %s>' % (how_long, self.storage_class)
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def to_xml(self):
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s = '<Transition>'
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s += '<StorageClass>%s</StorageClass>' % self.storage_class
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if self.days is not None:
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s += '<Days>%s</Days>' % self.days
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elif self.date is not None:
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s += '<Date>%s</Date>' % self.date
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s += '</Transition>'
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return s
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class Transitions(list):
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"""
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A container for the transitions associated with a Lifecycle's Rule configuration.
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"""
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def __init__(self):
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self.transition_properties = 3
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self.current_transition_property = 1
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self.temp_days = None
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self.temp_date = None
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self.temp_storage_class = None
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def startElement(self, name, attrs, connection):
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return None
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def endElement(self, name, value, connection):
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if name == 'Days':
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self.temp_days = int(value)
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elif name == 'Date':
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self.temp_date = value
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elif name == 'StorageClass':
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self.temp_storage_class = value
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# the XML does not contain a <Transitions> tag
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# but rather N number of <Transition> tags not
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# structured in any sort of hierarchy.
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if self.current_transition_property == self.transition_properties:
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self.append(Transition(self.temp_days, self.temp_date, self.temp_storage_class))
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self.temp_days = self.temp_date = self.temp_storage_class = None
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self.current_transition_property = 1
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else:
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self.current_transition_property += 1
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def to_xml(self):
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"""
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Returns a string containing the XML version of the Lifecycle
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configuration as defined by S3.
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"""
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s = ''
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for transition in self:
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s += transition.to_xml()
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return s
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def add_transition(self, days=None, date=None, storage_class=None):
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"""
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Add a transition to this Lifecycle configuration. This only adds
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the rule to the local copy. To install the new rule(s) on
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the bucket, you need to pass this Lifecycle config object
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to the configure_lifecycle method of the Bucket object.
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:ivar days: The number of days until the object should be moved.
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:ivar date: The date when the object should be moved. Should be
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in ISO 8601 format.
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:ivar storage_class: The storage class to transition to. Valid
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values are GLACIER, STANDARD_IA.
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"""
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transition = Transition(days, date, storage_class)
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self.append(transition)
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def __first_or_default(self, prop):
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for transition in self:
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return getattr(transition, prop)
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return None
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# maintain backwards compatibility so that we can continue utilizing
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# 'rule.transition.days' syntax
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@property
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def days(self):
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return self.__first_or_default('days')
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@property
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def date(self):
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return self.__first_or_default('date')
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@property
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def storage_class(self):
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return self.__first_or_default('storage_class')
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class Lifecycle(list):
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"""
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A container for the rules associated with a Lifecycle configuration.
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"""
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def startElement(self, name, attrs, connection):
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if name == 'Rule':
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rule = Rule()
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self.append(rule)
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return rule
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return None
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def endElement(self, name, value, connection):
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setattr(self, name, value)
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def to_xml(self):
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"""
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Returns a string containing the XML version of the Lifecycle
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configuration as defined by S3.
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"""
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s = '<?xml version="1.0" encoding="UTF-8"?>'
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s += '<LifecycleConfiguration>'
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for rule in self:
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s += rule.to_xml()
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s += '</LifecycleConfiguration>'
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return s
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def add_rule(self, id=None, prefix='', status='Enabled',
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expiration=None, transition=None):
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"""
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Add a rule to this Lifecycle configuration. This only adds
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the rule to the local copy. To install the new rule(s) on
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the bucket, you need to pass this Lifecycle config object
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to the configure_lifecycle method of the Bucket object.
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:type id: str
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:param id: Unique identifier for the rule. The value cannot be longer
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than 255 characters. This value is optional. The server will
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generate a unique value for the rule if no value is provided.
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:type prefix: str
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:iparam prefix: Prefix identifying one or more objects to which the
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rule applies.
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:type status: str
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:param status: If 'Enabled', the rule is currently being applied.
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If 'Disabled', the rule is not currently being applied.
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:type expiration: int
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:param expiration: Indicates the lifetime, in days, of the objects
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that are subject to the rule. The value must be a non-zero
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positive integer. A Expiration object instance is also perfect.
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:type transition: Transitions
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:param transition: Indicates when an object transitions to a
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different storage class.
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"""
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rule = Rule(id, prefix, status, expiration, transition)
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self.append(rule)
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