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# Copyright (c) 2006-2010 Mitch Garnaat http://garnaat.org/
# Copyright (c) 2010, Eucalyptus Systems, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import user
import key
from boto import handler
import xml.sax
class CompleteMultiPartUpload(object):
"""
Represents a completed MultiPart Upload. Contains the
following useful attributes:
* location - The URI of the completed upload
* bucket_name - The name of the bucket in which the upload
is contained
* key_name - The name of the new, completed key
* etag - The MD5 hash of the completed, combined upload
* version_id - The version_id of the completed upload
* encrypted - The value of the encryption header
"""
def __init__(self, bucket=None):
self.bucket = bucket
self.location = None
self.bucket_name = None
self.key_name = None
self.etag = None
self.version_id = None
self.encrypted = None
def __repr__(self):
return '<CompleteMultiPartUpload: %s.%s>' % (self.bucket_name,
self.key_name)
def startElement(self, name, attrs, connection):
return None
def endElement(self, name, value, connection):
if name == 'Location':
self.location = value
elif name == 'Bucket':
self.bucket_name = value
elif name == 'Key':
self.key_name = value
elif name == 'ETag':
self.etag = value
else:
setattr(self, name, value)
class Part(object):
"""
Represents a single part in a MultiPart upload.
Attributes include:
* part_number - The integer part number
* last_modified - The last modified date of this part
* etag - The MD5 hash of this part
* size - The size, in bytes, of this part
"""
def __init__(self, bucket=None):
self.bucket = bucket
self.part_number = None
self.last_modified = None
self.etag = None
self.size = None
def __repr__(self):
if isinstance(self.part_number, int):
return '<Part %d>' % self.part_number
else:
return '<Part %s>' % None
def startElement(self, name, attrs, connection):
return None
def endElement(self, name, value, connection):
if name == 'PartNumber':
self.part_number = int(value)
elif name == 'LastModified':
self.last_modified = value
elif name == 'ETag':
self.etag = value
elif name == 'Size':
self.size = int(value)
else:
setattr(self, name, value)
def part_lister(mpupload, part_number_marker=None):
"""
A generator function for listing parts of a multipart upload.
"""
more_results = True
part = None
while more_results:
parts = mpupload.get_all_parts(None, part_number_marker)
for part in parts:
yield part
part_number_marker = mpupload.next_part_number_marker
more_results= mpupload.is_truncated
class MultiPartUpload(object):
"""
Represents a MultiPart Upload operation.
"""
def __init__(self, bucket=None):
self.bucket = bucket
self.bucket_name = None
self.key_name = None
self.id = id
self.initiator = None
self.owner = None
self.storage_class = None
self.initiated = None
self.part_number_marker = None
self.next_part_number_marker = None
self.max_parts = None
self.is_truncated = False
self._parts = None
def __repr__(self):
return '<MultiPartUpload %s>' % self.key_name
def __iter__(self):
return part_lister(self)
def to_xml(self):
s = '<CompleteMultipartUpload>\n'
for part in self:
s += ' <Part>\n'
s += ' <PartNumber>%d</PartNumber>\n' % part.part_number
s += ' <ETag>%s</ETag>\n' % part.etag
s += ' </Part>\n'
s += '</CompleteMultipartUpload>'
return s
def startElement(self, name, attrs, connection):
if name == 'Initiator':
self.initiator = user.User(self)
return self.initiator
elif name == 'Owner':
self.owner = user.User(self)
return self.owner
elif name == 'Part':
part = Part(self.bucket)
self._parts.append(part)
return part
return None
def endElement(self, name, value, connection):
if name == 'Bucket':
self.bucket_name = value
elif name == 'Key':
self.key_name = value
elif name == 'UploadId':
self.id = value
elif name == 'StorageClass':
self.storage_class = value
elif name == 'PartNumberMarker':
self.part_number_marker = value
elif name == 'NextPartNumberMarker':
self.next_part_number_marker = value
elif name == 'MaxParts':
self.max_parts = int(value)
elif name == 'IsTruncated':
if value == 'true':
self.is_truncated = True
else:
self.is_truncated = False
elif name == 'Initiated':
self.initiated = value
else:
setattr(self, name, value)
def get_all_parts(self, max_parts=None, part_number_marker=None):
"""
Return the uploaded parts of this MultiPart Upload. This is
a lower-level method that requires you to manually page through
results. To simplify this process, you can just use the
object itself as an iterator and it will automatically handle
all of the paging with S3.
"""
self._parts = []
query_args = 'uploadId=%s' % self.id
if max_parts:
query_args += '&max-parts=%d' % max_parts
if part_number_marker:
query_args += '&part-number-marker=%s' % part_number_marker
response = self.bucket.connection.make_request('GET', self.bucket.name,
self.key_name,
query_args=query_args)
body = response.read()
if response.status == 200:
h = handler.XmlHandler(self, self)
xml.sax.parseString(body, h)
return self._parts
def upload_part_from_file(self, fp, part_num, headers=None, replace=True,
cb=None, num_cb=10, policy=None, md5=None,
size=None):
"""
Upload another part of this MultiPart Upload.
:type fp: file
:param fp: The file object you want to upload.
:type part_num: int
:param part_num: The number of this part.
The other parameters are exactly as defined for the
:class:`boto.s3.key.Key` set_contents_from_file method.
"""
if part_num < 1:
raise ValueError('Part numbers must be greater than zero')
query_args = 'uploadId=%s&partNumber=%d' % (self.id, part_num)
key = self.bucket.new_key(self.key_name)
key.set_contents_from_file(fp, headers, replace, cb, num_cb, policy,
md5, reduced_redundancy=False,
query_args=query_args, size=size)
def copy_part_from_key(self, src_bucket_name, src_key_name, part_num,
start=None, end=None):
"""
Copy another part of this MultiPart Upload.
:type src_bucket_name: string
:param src_bucket_name: Name of the bucket containing the source key
:type src_key_name: string
:param src_key_name: Name of the source key
:type part_num: int
:param part_num: The number of this part.
:type start: int
:param start: Zero-based byte offset to start copying from
:type end: int
:param end: Zero-based byte offset to copy to
"""
if part_num < 1:
raise ValueError('Part numbers must be greater than zero')
query_args = 'uploadId=%s&partNumber=%d' % (self.id, part_num)
if start is not None and end is not None:
rng = 'bytes=%s-%s' % (start, end)
provider = self.bucket.connection.provider
headers = {provider.copy_source_range_header: rng}
else:
headers = None
return self.bucket.copy_key(self.key_name, src_bucket_name,
src_key_name, storage_class=None,
headers=headers,
query_args=query_args)
def complete_upload(self):
"""
Complete the MultiPart Upload operation. This method should
be called when all parts of the file have been successfully
uploaded to S3.
:rtype: :class:`boto.s3.multipart.CompletedMultiPartUpload`
:returns: An object representing the completed upload.
"""
xml = self.to_xml()
return self.bucket.complete_multipart_upload(self.key_name,
self.id, xml)
def cancel_upload(self):
"""
Cancels a MultiPart Upload operation. The storage consumed by
any previously uploaded parts will be freed. However, if any
part uploads are currently in progress, those part uploads
might or might not succeed. As a result, it might be necessary
to abort a given multipart upload multiple times in order to
completely free all storage consumed by all parts.
"""
self.bucket.cancel_multipart_upload(self.key_name, self.id)
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