annotate planemo/lib/python3.7/site-packages/boto/s3/multipart.py @ 0:d30785e31577 draft

"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:18:57 -0400
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1 # Copyright (c) 2006-2012 Mitch Garnaat http://garnaat.org/
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2 # Copyright (c) 2012 Amazon.com, Inc. or its affiliates.
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3 # Copyright (c) 2010, Eucalyptus Systems, Inc.
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4 # All Rights Reserved
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5 #
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6 # Permission is hereby granted, free of charge, to any person obtaining a
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7 # copy of this software and associated documentation files (the
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8 # "Software"), to deal in the Software without restriction, including
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9 # without limitation the rights to use, copy, modify, merge, publish, dis-
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10 # tribute, sublicense, and/or sell copies of the Software, and to permit
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11 # persons to whom the Software is furnished to do so, subject to the fol-
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12 # lowing conditions:
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13 #
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14 # The above copyright notice and this permission notice shall be included
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15 # in all copies or substantial portions of the Software.
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16 #
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17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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18 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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19 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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20 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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21 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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23 # IN THE SOFTWARE.
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24
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25 from boto.s3 import user
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26 from boto.s3 import key
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27 from boto import handler
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28 import xml.sax
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29
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30
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31 class CompleteMultiPartUpload(object):
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32 """
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33 Represents a completed MultiPart Upload. Contains the
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34 following useful attributes:
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35
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36 * location - The URI of the completed upload
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37 * bucket_name - The name of the bucket in which the upload
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38 is contained
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39 * key_name - The name of the new, completed key
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40 * etag - The MD5 hash of the completed, combined upload
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41 * version_id - The version_id of the completed upload
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42 * encrypted - The value of the encryption header
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43 """
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44
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45 def __init__(self, bucket=None):
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46 self.bucket = bucket
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47 self.location = None
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48 self.bucket_name = None
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49 self.key_name = None
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50 self.etag = None
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51 self.version_id = None
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52 self.encrypted = None
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53
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54 def __repr__(self):
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55 return '<CompleteMultiPartUpload: %s.%s>' % (self.bucket_name,
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56 self.key_name)
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57
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58 def startElement(self, name, attrs, connection):
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59 return None
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60
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61 def endElement(self, name, value, connection):
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62 if name == 'Location':
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63 self.location = value
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64 elif name == 'Bucket':
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65 self.bucket_name = value
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66 elif name == 'Key':
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67 self.key_name = value
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68 elif name == 'ETag':
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69 self.etag = value
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70 else:
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71 setattr(self, name, value)
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72
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73
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74 class Part(object):
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75 """
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76 Represents a single part in a MultiPart upload.
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77 Attributes include:
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78
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79 * part_number - The integer part number
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80 * last_modified - The last modified date of this part
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81 * etag - The MD5 hash of this part
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82 * size - The size, in bytes, of this part
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83 """
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84
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85 def __init__(self, bucket=None):
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86 self.bucket = bucket
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87 self.part_number = None
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88 self.last_modified = None
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89 self.etag = None
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90 self.size = None
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91
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92 def __repr__(self):
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93 if isinstance(self.part_number, int):
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94 return '<Part %d>' % self.part_number
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95 else:
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96 return '<Part %s>' % None
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97
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98 def startElement(self, name, attrs, connection):
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99 return None
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100
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101 def endElement(self, name, value, connection):
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102 if name == 'PartNumber':
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103 self.part_number = int(value)
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104 elif name == 'LastModified':
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105 self.last_modified = value
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106 elif name == 'ETag':
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107 self.etag = value
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108 elif name == 'Size':
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109 self.size = int(value)
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110 else:
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111 setattr(self, name, value)
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112
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113
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114 def part_lister(mpupload, part_number_marker=None):
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115 """
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116 A generator function for listing parts of a multipart upload.
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117 """
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118 more_results = True
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119 part = None
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120 while more_results:
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121 parts = mpupload.get_all_parts(None, part_number_marker)
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122 for part in parts:
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123 yield part
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124 part_number_marker = mpupload.next_part_number_marker
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125 more_results = mpupload.is_truncated
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126
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127
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128 class MultiPartUpload(object):
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129 """
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130 Represents a MultiPart Upload operation.
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131 """
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132
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133 def __init__(self, bucket=None):
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134 self.bucket = bucket
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135 self.bucket_name = None
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136 self.key_name = None
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137 self.id = id
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138 self.initiator = None
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139 self.owner = None
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140 self.storage_class = None
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141 self.initiated = None
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142 self.part_number_marker = None
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143 self.next_part_number_marker = None
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144 self.max_parts = None
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145 self.is_truncated = False
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146 self._parts = None
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147
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148 def __repr__(self):
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149 return '<MultiPartUpload %s>' % self.key_name
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150
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151 def __iter__(self):
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152 return part_lister(self)
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153
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154 def to_xml(self):
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155 s = '<CompleteMultipartUpload>\n'
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156 for part in self:
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157 s += ' <Part>\n'
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158 s += ' <PartNumber>%d</PartNumber>\n' % part.part_number
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159 s += ' <ETag>%s</ETag>\n' % part.etag
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160 s += ' </Part>\n'
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161 s += '</CompleteMultipartUpload>'
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162 return s
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163
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164 def startElement(self, name, attrs, connection):
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165 if name == 'Initiator':
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166 self.initiator = user.User(self)
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167 return self.initiator
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168 elif name == 'Owner':
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169 self.owner = user.User(self)
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170 return self.owner
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171 elif name == 'Part':
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172 part = Part(self.bucket)
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173 self._parts.append(part)
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174 return part
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175 return None
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176
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177 def endElement(self, name, value, connection):
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178 if name == 'Bucket':
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179 self.bucket_name = value
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180 elif name == 'Key':
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181 self.key_name = value
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182 elif name == 'UploadId':
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183 self.id = value
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184 elif name == 'StorageClass':
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185 self.storage_class = value
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186 elif name == 'PartNumberMarker':
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187 self.part_number_marker = value
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188 elif name == 'NextPartNumberMarker':
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189 self.next_part_number_marker = value
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190 elif name == 'MaxParts':
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191 self.max_parts = int(value)
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192 elif name == 'IsTruncated':
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193 if value == 'true':
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194 self.is_truncated = True
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195 else:
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196 self.is_truncated = False
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197 elif name == 'Initiated':
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198 self.initiated = value
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199 else:
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200 setattr(self, name, value)
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201
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202 def get_all_parts(self, max_parts=None, part_number_marker=None,
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203 encoding_type=None):
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204 """
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205 Return the uploaded parts of this MultiPart Upload. This is
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206 a lower-level method that requires you to manually page through
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207 results. To simplify this process, you can just use the
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208 object itself as an iterator and it will automatically handle
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209 all of the paging with S3.
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210 """
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211 self._parts = []
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212 query_args = 'uploadId=%s' % self.id
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213 if max_parts:
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214 query_args += '&max-parts=%d' % max_parts
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215 if part_number_marker:
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216 query_args += '&part-number-marker=%s' % part_number_marker
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217 if encoding_type:
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218 query_args += '&encoding-type=%s' % encoding_type
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219 response = self.bucket.connection.make_request('GET', self.bucket.name,
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220 self.key_name,
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221 query_args=query_args)
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222 body = response.read()
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223 if response.status == 200:
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224 h = handler.XmlHandler(self, self)
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225 xml.sax.parseString(body, h)
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226 return self._parts
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227
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228 def upload_part_from_file(self, fp, part_num, headers=None, replace=True,
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229 cb=None, num_cb=10, md5=None, size=None):
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230 """
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231 Upload another part of this MultiPart Upload.
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232
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233 .. note::
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234
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235 After you initiate multipart upload and upload one or more parts,
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236 you must either complete or abort multipart upload in order to stop
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237 getting charged for storage of the uploaded parts. Only after you
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238 either complete or abort multipart upload, Amazon S3 frees up the
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239 parts storage and stops charging you for the parts storage.
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240
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241 :type fp: file
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242 :param fp: The file object you want to upload.
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243
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244 :type part_num: int
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245 :param part_num: The number of this part.
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246
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247 The other parameters are exactly as defined for the
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248 :class:`boto.s3.key.Key` set_contents_from_file method.
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249
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250 :rtype: :class:`boto.s3.key.Key` or subclass
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251 :returns: The uploaded part containing the etag.
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252 """
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253 if part_num < 1:
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254 raise ValueError('Part numbers must be greater than zero')
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255 query_args = 'uploadId=%s&partNumber=%d' % (self.id, part_num)
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256 key = self.bucket.new_key(self.key_name)
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257 key.set_contents_from_file(fp, headers=headers, replace=replace,
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258 cb=cb, num_cb=num_cb, md5=md5,
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259 reduced_redundancy=False,
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260 query_args=query_args, size=size)
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261 return key
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262
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263 def copy_part_from_key(self, src_bucket_name, src_key_name, part_num,
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264 start=None, end=None, src_version_id=None,
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265 headers=None):
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266 """
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267 Copy another part of this MultiPart Upload.
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268
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269 :type src_bucket_name: string
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270 :param src_bucket_name: Name of the bucket containing the source key
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271
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272 :type src_key_name: string
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273 :param src_key_name: Name of the source key
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274
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275 :type part_num: int
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276 :param part_num: The number of this part.
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277
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278 :type start: int
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279 :param start: Zero-based byte offset to start copying from
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280
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281 :type end: int
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282 :param end: Zero-based byte offset to copy to
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283
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284 :type src_version_id: string
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285 :param src_version_id: version_id of source object to copy from
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286
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287 :type headers: dict
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288 :param headers: Any headers to pass along in the request
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289 """
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290 if part_num < 1:
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291 raise ValueError('Part numbers must be greater than zero')
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292 query_args = 'uploadId=%s&partNumber=%d' % (self.id, part_num)
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293 if start is not None and end is not None:
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294 rng = 'bytes=%s-%s' % (start, end)
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295 provider = self.bucket.connection.provider
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296 if headers is None:
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297 headers = {}
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298 else:
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299 headers = headers.copy()
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300 headers[provider.copy_source_range_header] = rng
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301 return self.bucket.copy_key(self.key_name, src_bucket_name,
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302 src_key_name,
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303 src_version_id=src_version_id,
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304 storage_class=None,
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305 headers=headers,
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306 query_args=query_args)
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307
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308 def complete_upload(self):
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309 """
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310 Complete the MultiPart Upload operation. This method should
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311 be called when all parts of the file have been successfully
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312 uploaded to S3.
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313
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314 :rtype: :class:`boto.s3.multipart.CompletedMultiPartUpload`
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315 :returns: An object representing the completed upload.
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316 """
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317 xml = self.to_xml()
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318 return self.bucket.complete_multipart_upload(self.key_name,
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319 self.id, xml)
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320
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321 def cancel_upload(self):
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322 """
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323 Cancels a MultiPart Upload operation. The storage consumed by
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324 any previously uploaded parts will be freed. However, if any
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325 part uploads are currently in progress, those part uploads
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326 might or might not succeed. As a result, it might be necessary
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327 to abort a given multipart upload multiple times in order to
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328 completely free all storage consumed by all parts.
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329 """
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330 self.bucket.cancel_multipart_upload(self.key_name, self.id)