Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/site-packages/boto/provider.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # Copyright (c) 2010 Mitch Garnaat http://garnaat.org/
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2 # Copyright 2010 Google Inc.
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3 # Copyright (c) 2010, Eucalyptus Systems, Inc.
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4 # Copyright (c) 2011, Nexenta Systems Inc.
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5 # All rights reserved.
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6 #
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7 # Permission is hereby granted, free of charge, to any person obtaining a
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8 # copy of this software and associated documentation files (the
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9 # "Software"), to deal in the Software without restriction, including
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10 # without limitation the rights to use, copy, modify, merge, publish, dis-
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11 # tribute, sublicense, and/or sell copies of the Software, and to permit
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12 # persons to whom the Software is furnished to do so, subject to the fol-
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13 # lowing conditions:
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14 #
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15 # The above copyright notice and this permission notice shall be included
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16 # in all copies or substantial portions of the Software.
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17 #
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18 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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19 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
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20 # ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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21 # SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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22 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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24 # IN THE SOFTWARE.
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25 """
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26 This class encapsulates the provider-specific header differences.
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27 """
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28
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29 import os
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30 from boto.compat import six
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31 from datetime import datetime
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32
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33 import boto
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34 from boto import config
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35 from boto.compat import expanduser
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36 from boto.pyami.config import Config
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37 from boto.gs.acl import ACL
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38 from boto.gs.acl import CannedACLStrings as CannedGSACLStrings
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39 from boto.s3.acl import CannedACLStrings as CannedS3ACLStrings
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40 from boto.s3.acl import Policy
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41
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42
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43 HEADER_PREFIX_KEY = 'header_prefix'
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44 METADATA_PREFIX_KEY = 'metadata_prefix'
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45
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46 AWS_HEADER_PREFIX = 'x-amz-'
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47 GOOG_HEADER_PREFIX = 'x-goog-'
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48
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49 ACL_HEADER_KEY = 'acl-header'
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50 AUTH_HEADER_KEY = 'auth-header'
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51 COPY_SOURCE_HEADER_KEY = 'copy-source-header'
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52 COPY_SOURCE_VERSION_ID_HEADER_KEY = 'copy-source-version-id-header'
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53 COPY_SOURCE_RANGE_HEADER_KEY = 'copy-source-range-header'
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54 DELETE_MARKER_HEADER_KEY = 'delete-marker-header'
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55 DATE_HEADER_KEY = 'date-header'
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56 METADATA_DIRECTIVE_HEADER_KEY = 'metadata-directive-header'
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57 RESUMABLE_UPLOAD_HEADER_KEY = 'resumable-upload-header'
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58 SECURITY_TOKEN_HEADER_KEY = 'security-token-header'
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59 STORAGE_CLASS_HEADER_KEY = 'storage-class'
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60 MFA_HEADER_KEY = 'mfa-header'
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61 SERVER_SIDE_ENCRYPTION_KEY = 'server-side-encryption-header'
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62 VERSION_ID_HEADER_KEY = 'version-id-header'
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63 RESTORE_HEADER_KEY = 'restore-header'
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64
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65 STORAGE_COPY_ERROR = 'StorageCopyError'
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66 STORAGE_CREATE_ERROR = 'StorageCreateError'
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67 STORAGE_DATA_ERROR = 'StorageDataError'
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68 STORAGE_PERMISSIONS_ERROR = 'StoragePermissionsError'
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69 STORAGE_RESPONSE_ERROR = 'StorageResponseError'
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70 NO_CREDENTIALS_PROVIDED = object()
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71
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72
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73 class ProfileNotFoundError(ValueError):
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74 pass
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75
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76
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77 class Provider(object):
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78
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79 CredentialMap = {
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80 'aws': ('aws_access_key_id', 'aws_secret_access_key',
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81 'aws_security_token', 'aws_profile'),
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82 'google': ('gs_access_key_id', 'gs_secret_access_key',
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83 None, None),
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84 }
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85
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86 AclClassMap = {
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87 'aws': Policy,
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88 'google': ACL
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89 }
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90
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91 CannedAclsMap = {
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92 'aws': CannedS3ACLStrings,
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93 'google': CannedGSACLStrings
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94 }
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95
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96 HostKeyMap = {
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97 'aws': 's3',
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98 'google': 'gs'
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99 }
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100
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101 ChunkedTransferSupport = {
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102 'aws': False,
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103 'google': True
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104 }
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105
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106 MetadataServiceSupport = {
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107 'aws': True,
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108 'google': False
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109 }
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110
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111 # If you update this map please make sure to put "None" for the
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112 # right-hand-side for any headers that don't apply to a provider, rather
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113 # than simply leaving that header out (which would cause KeyErrors).
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114 HeaderInfoMap = {
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115 'aws': {
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116 HEADER_PREFIX_KEY: AWS_HEADER_PREFIX,
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117 METADATA_PREFIX_KEY: AWS_HEADER_PREFIX + 'meta-',
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118 ACL_HEADER_KEY: AWS_HEADER_PREFIX + 'acl',
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119 AUTH_HEADER_KEY: 'AWS',
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120 COPY_SOURCE_HEADER_KEY: AWS_HEADER_PREFIX + 'copy-source',
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121 COPY_SOURCE_VERSION_ID_HEADER_KEY: AWS_HEADER_PREFIX +
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122 'copy-source-version-id',
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123 COPY_SOURCE_RANGE_HEADER_KEY: AWS_HEADER_PREFIX +
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124 'copy-source-range',
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125 DATE_HEADER_KEY: AWS_HEADER_PREFIX + 'date',
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126 DELETE_MARKER_HEADER_KEY: AWS_HEADER_PREFIX + 'delete-marker',
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127 METADATA_DIRECTIVE_HEADER_KEY: AWS_HEADER_PREFIX +
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128 'metadata-directive',
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129 RESUMABLE_UPLOAD_HEADER_KEY: None,
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130 SECURITY_TOKEN_HEADER_KEY: AWS_HEADER_PREFIX + 'security-token',
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131 SERVER_SIDE_ENCRYPTION_KEY: AWS_HEADER_PREFIX +
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132 'server-side-encryption',
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133 VERSION_ID_HEADER_KEY: AWS_HEADER_PREFIX + 'version-id',
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134 STORAGE_CLASS_HEADER_KEY: AWS_HEADER_PREFIX + 'storage-class',
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135 MFA_HEADER_KEY: AWS_HEADER_PREFIX + 'mfa',
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136 RESTORE_HEADER_KEY: AWS_HEADER_PREFIX + 'restore',
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137 },
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138 'google': {
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139 HEADER_PREFIX_KEY: GOOG_HEADER_PREFIX,
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140 METADATA_PREFIX_KEY: GOOG_HEADER_PREFIX + 'meta-',
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141 ACL_HEADER_KEY: GOOG_HEADER_PREFIX + 'acl',
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142 AUTH_HEADER_KEY: 'GOOG1',
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143 COPY_SOURCE_HEADER_KEY: GOOG_HEADER_PREFIX + 'copy-source',
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144 COPY_SOURCE_VERSION_ID_HEADER_KEY: GOOG_HEADER_PREFIX +
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145 'copy-source-version-id',
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146 COPY_SOURCE_RANGE_HEADER_KEY: None,
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147 DATE_HEADER_KEY: GOOG_HEADER_PREFIX + 'date',
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148 DELETE_MARKER_HEADER_KEY: GOOG_HEADER_PREFIX + 'delete-marker',
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149 METADATA_DIRECTIVE_HEADER_KEY: GOOG_HEADER_PREFIX +
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150 'metadata-directive',
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151 RESUMABLE_UPLOAD_HEADER_KEY: GOOG_HEADER_PREFIX + 'resumable',
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152 SECURITY_TOKEN_HEADER_KEY: GOOG_HEADER_PREFIX + 'security-token',
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153 SERVER_SIDE_ENCRYPTION_KEY: None,
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154 # Note that this version header is not to be confused with
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155 # the Google Cloud Storage 'x-goog-api-version' header.
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156 VERSION_ID_HEADER_KEY: GOOG_HEADER_PREFIX + 'version-id',
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157 STORAGE_CLASS_HEADER_KEY: None,
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158 MFA_HEADER_KEY: None,
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159 RESTORE_HEADER_KEY: None,
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160 }
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161 }
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162
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163 ErrorMap = {
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164 'aws': {
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165 STORAGE_COPY_ERROR: boto.exception.S3CopyError,
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166 STORAGE_CREATE_ERROR: boto.exception.S3CreateError,
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167 STORAGE_DATA_ERROR: boto.exception.S3DataError,
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168 STORAGE_PERMISSIONS_ERROR: boto.exception.S3PermissionsError,
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169 STORAGE_RESPONSE_ERROR: boto.exception.S3ResponseError,
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170 },
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171 'google': {
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172 STORAGE_COPY_ERROR: boto.exception.GSCopyError,
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173 STORAGE_CREATE_ERROR: boto.exception.GSCreateError,
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174 STORAGE_DATA_ERROR: boto.exception.GSDataError,
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175 STORAGE_PERMISSIONS_ERROR: boto.exception.GSPermissionsError,
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176 STORAGE_RESPONSE_ERROR: boto.exception.GSResponseError,
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177 }
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178 }
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179
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180 def __init__(self, name, access_key=None, secret_key=None,
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181 security_token=None, profile_name=None):
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182 self.host = None
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183 self.port = None
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184 self.host_header = None
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185 self.access_key = access_key
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186 self.secret_key = secret_key
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187 self.security_token = security_token
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188 self.profile_name = profile_name
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189 self.name = name
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190 self.acl_class = self.AclClassMap[self.name]
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191 self.canned_acls = self.CannedAclsMap[self.name]
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192 self._credential_expiry_time = None
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193
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194 # Load shared credentials file if it exists
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195 shared_path = os.path.join(expanduser('~'), '.' + name, 'credentials')
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196 self.shared_credentials = Config(do_load=False)
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197 if os.path.isfile(shared_path):
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198 self.shared_credentials.load_from_path(shared_path)
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199
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200 self.get_credentials(access_key, secret_key, security_token, profile_name)
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201 self.configure_headers()
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202 self.configure_errors()
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203
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204 # Allow config file to override default host and port.
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205 host_opt_name = '%s_host' % self.HostKeyMap[self.name]
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206 if config.has_option('Credentials', host_opt_name):
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207 self.host = config.get('Credentials', host_opt_name)
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208 port_opt_name = '%s_port' % self.HostKeyMap[self.name]
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209 if config.has_option('Credentials', port_opt_name):
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210 self.port = config.getint('Credentials', port_opt_name)
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211 host_header_opt_name = '%s_host_header' % self.HostKeyMap[self.name]
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212 if config.has_option('Credentials', host_header_opt_name):
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213 self.host_header = config.get('Credentials', host_header_opt_name)
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214
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215 def get_access_key(self):
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216 if self._credentials_need_refresh():
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217 self._populate_keys_from_metadata_server()
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218 return self._access_key
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219
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220 def set_access_key(self, value):
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221 self._access_key = value
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222
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223 access_key = property(get_access_key, set_access_key)
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224
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225 def get_secret_key(self):
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226 if self._credentials_need_refresh():
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227 self._populate_keys_from_metadata_server()
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228 return self._secret_key
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229
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230 def set_secret_key(self, value):
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231 self._secret_key = value
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232
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233 secret_key = property(get_secret_key, set_secret_key)
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234
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235 def get_security_token(self):
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236 if self._credentials_need_refresh():
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237 self._populate_keys_from_metadata_server()
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238 return self._security_token
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239
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240 def set_security_token(self, value):
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241 self._security_token = value
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242
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243 security_token = property(get_security_token, set_security_token)
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244
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245 def _credentials_need_refresh(self):
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246 if self._credential_expiry_time is None:
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247 return False
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248 else:
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249 # The credentials should be refreshed if they're going to expire
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250 # in less than 5 minutes.
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251 delta = self._credential_expiry_time - datetime.utcnow()
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252 # python2.6 does not have timedelta.total_seconds() so we have
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253 # to calculate this ourselves. This is straight from the
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254 # datetime docs.
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255 seconds_left = (
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256 (delta.microseconds + (delta.seconds + delta.days * 24 * 3600)
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257 * 10 ** 6) / 10 ** 6)
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258 if seconds_left < (5 * 60):
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259 boto.log.debug("Credentials need to be refreshed.")
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260 return True
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261 else:
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262 return False
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263
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264 def get_credentials(self, access_key=None, secret_key=None,
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265 security_token=None, profile_name=None):
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266 access_key_name, secret_key_name, security_token_name, \
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267 profile_name_name = self.CredentialMap[self.name]
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268
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269 # Load profile from shared environment variable if it was not
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270 # already passed in and the environment variable exists
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271 if profile_name is None and profile_name_name is not None and \
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272 profile_name_name.upper() in os.environ:
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273 profile_name = os.environ[profile_name_name.upper()]
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274
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275 shared = self.shared_credentials
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276
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277 if access_key is not None:
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278 self.access_key = access_key
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279 boto.log.debug("Using access key provided by client.")
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280 elif access_key_name.upper() in os.environ:
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281 self.access_key = os.environ[access_key_name.upper()]
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282 boto.log.debug("Using access key found in environment variable.")
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283 elif profile_name is not None:
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284 if shared.has_option(profile_name, access_key_name):
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285 self.access_key = shared.get(profile_name, access_key_name)
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286 boto.log.debug("Using access key found in shared credential "
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287 "file for profile %s." % profile_name)
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288 elif config.has_option("profile %s" % profile_name,
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289 access_key_name):
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290 self.access_key = config.get("profile %s" % profile_name,
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291 access_key_name)
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292 boto.log.debug("Using access key found in config file: "
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293 "profile %s." % profile_name)
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294 else:
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295 raise ProfileNotFoundError('Profile "%s" not found!' %
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296 profile_name)
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297 elif shared.has_option('default', access_key_name):
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298 self.access_key = shared.get('default', access_key_name)
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299 boto.log.debug("Using access key found in shared credential file.")
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300 elif config.has_option('Credentials', access_key_name):
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301 self.access_key = config.get('Credentials', access_key_name)
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302 boto.log.debug("Using access key found in config file.")
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303
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304 if secret_key is not None:
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305 self.secret_key = secret_key
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306 boto.log.debug("Using secret key provided by client.")
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307 elif secret_key_name.upper() in os.environ:
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308 self.secret_key = os.environ[secret_key_name.upper()]
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309 boto.log.debug("Using secret key found in environment variable.")
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310 elif profile_name is not None:
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311 if shared.has_option(profile_name, secret_key_name):
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312 self.secret_key = shared.get(profile_name, secret_key_name)
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313 boto.log.debug("Using secret key found in shared credential "
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314 "file for profile %s." % profile_name)
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315 elif config.has_option("profile %s" % profile_name, secret_key_name):
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316 self.secret_key = config.get("profile %s" % profile_name,
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317 secret_key_name)
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318 boto.log.debug("Using secret key found in config file: "
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319 "profile %s." % profile_name)
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320 else:
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321 raise ProfileNotFoundError('Profile "%s" not found!' %
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322 profile_name)
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323 elif shared.has_option('default', secret_key_name):
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324 self.secret_key = shared.get('default', secret_key_name)
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325 boto.log.debug("Using secret key found in shared credential file.")
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326 elif config.has_option('Credentials', secret_key_name):
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327 self.secret_key = config.get('Credentials', secret_key_name)
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328 boto.log.debug("Using secret key found in config file.")
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329 elif config.has_option('Credentials', 'keyring'):
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330 keyring_name = config.get('Credentials', 'keyring')
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331 try:
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332 import keyring
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333 except ImportError:
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334 boto.log.error("The keyring module could not be imported. "
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335 "For keyring support, install the keyring "
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336 "module.")
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337 raise
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338 self.secret_key = keyring.get_password(
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339 keyring_name, self.access_key)
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340 boto.log.debug("Using secret key found in keyring.")
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341
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342 if security_token is not None:
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343 self.security_token = security_token
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344 boto.log.debug("Using security token provided by client.")
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345 elif ((security_token_name is not None) and
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346 (access_key is None) and (secret_key is None)):
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347 # Only provide a token from the environment/config if the
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348 # caller did not specify a key and secret. Otherwise an
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349 # environment/config token could be paired with a
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350 # different set of credentials provided by the caller
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351 if security_token_name.upper() in os.environ:
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352 self.security_token = os.environ[security_token_name.upper()]
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353 boto.log.debug("Using security token found in environment"
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354 " variable.")
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355 elif shared.has_option(profile_name or 'default',
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356 security_token_name):
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357 self.security_token = shared.get(profile_name or 'default',
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358 security_token_name)
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359 boto.log.debug("Using security token found in shared "
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360 "credential file.")
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361 elif profile_name is not None:
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362 if config.has_option("profile %s" % profile_name,
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363 security_token_name):
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364 boto.log.debug("config has option")
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365 self.security_token = config.get("profile %s" % profile_name,
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366 security_token_name)
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367 boto.log.debug("Using security token found in config file: "
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368 "profile %s." % profile_name)
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369 elif config.has_option('Credentials', security_token_name):
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370 self.security_token = config.get('Credentials',
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371 security_token_name)
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372 boto.log.debug("Using security token found in config file.")
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373
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374 if ((self._access_key is None or self._secret_key is None) and
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375 self.MetadataServiceSupport[self.name]):
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376 self._populate_keys_from_metadata_server()
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377 self._secret_key = self._convert_key_to_str(self._secret_key)
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378
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379 def _populate_keys_from_metadata_server(self):
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380 # get_instance_metadata is imported here because of a circular
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381 # dependency.
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382 boto.log.debug("Retrieving credentials from metadata server.")
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383 from boto.utils import get_instance_metadata
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384 timeout = config.getfloat('Boto', 'metadata_service_timeout', 1.0)
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385 attempts = config.getint('Boto', 'metadata_service_num_attempts', 1)
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386 # The num_retries arg is actually the total number of attempts made,
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387 # so the config options is named *_num_attempts to make this more
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388 # clear to users.
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389 metadata = get_instance_metadata(
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390 timeout=timeout, num_retries=attempts,
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391 data='meta-data/iam/security-credentials/')
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392 if metadata:
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393 # I'm assuming there's only one role on the instance profile.
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394 security = list(metadata.values())[0]
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395 self._access_key = security['AccessKeyId']
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396 self._secret_key = self._convert_key_to_str(security['SecretAccessKey'])
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397 self._security_token = security['Token']
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398 expires_at = security['Expiration']
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399 self._credential_expiry_time = datetime.strptime(
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400 expires_at, "%Y-%m-%dT%H:%M:%SZ")
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401 boto.log.debug("Retrieved credentials will expire in %s at: %s",
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402 self._credential_expiry_time - datetime.now(), expires_at)
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403
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404 def _convert_key_to_str(self, key):
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405 if isinstance(key, six.text_type):
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406 # the secret key must be bytes and not unicode to work
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407 # properly with hmac.new (see http://bugs.python.org/issue5285)
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408 return str(key)
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409 return key
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410
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411 def configure_headers(self):
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412 header_info_map = self.HeaderInfoMap[self.name]
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413 self.metadata_prefix = header_info_map[METADATA_PREFIX_KEY]
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414 self.header_prefix = header_info_map[HEADER_PREFIX_KEY]
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415 self.acl_header = header_info_map[ACL_HEADER_KEY]
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416 self.auth_header = header_info_map[AUTH_HEADER_KEY]
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417 self.copy_source_header = header_info_map[COPY_SOURCE_HEADER_KEY]
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418 self.copy_source_version_id = header_info_map[
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419 COPY_SOURCE_VERSION_ID_HEADER_KEY]
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420 self.copy_source_range_header = header_info_map[
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421 COPY_SOURCE_RANGE_HEADER_KEY]
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422 self.date_header = header_info_map[DATE_HEADER_KEY]
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423 self.delete_marker = header_info_map[DELETE_MARKER_HEADER_KEY]
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424 self.metadata_directive_header = (
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425 header_info_map[METADATA_DIRECTIVE_HEADER_KEY])
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426 self.security_token_header = header_info_map[SECURITY_TOKEN_HEADER_KEY]
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427 self.resumable_upload_header = (
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428 header_info_map[RESUMABLE_UPLOAD_HEADER_KEY])
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429 self.server_side_encryption_header = header_info_map[SERVER_SIDE_ENCRYPTION_KEY]
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430 self.storage_class_header = header_info_map[STORAGE_CLASS_HEADER_KEY]
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431 self.version_id = header_info_map[VERSION_ID_HEADER_KEY]
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432 self.mfa_header = header_info_map[MFA_HEADER_KEY]
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433 self.restore_header = header_info_map[RESTORE_HEADER_KEY]
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434
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435 def configure_errors(self):
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436 error_map = self.ErrorMap[self.name]
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437 self.storage_copy_error = error_map[STORAGE_COPY_ERROR]
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438 self.storage_create_error = error_map[STORAGE_CREATE_ERROR]
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439 self.storage_data_error = error_map[STORAGE_DATA_ERROR]
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440 self.storage_permissions_error = error_map[STORAGE_PERMISSIONS_ERROR]
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441 self.storage_response_error = error_map[STORAGE_RESPONSE_ERROR]
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442
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443 def get_provider_name(self):
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444 return self.HostKeyMap[self.name]
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445
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446 def supports_chunked_transfer(self):
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447 return self.ChunkedTransferSupport[self.name]
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448
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449
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450 # Static utility method for getting default Provider.
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451 def get_default():
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452 return Provider('aws')