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

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:18:57 -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.exception import InvalidInstanceMetadataError
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38 from boto.gs.acl import ACL
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39 from boto.gs.acl import CannedACLStrings as CannedGSACLStrings
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40 from boto.s3.acl import CannedACLStrings as CannedS3ACLStrings
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41 from boto.s3.acl import Policy
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42
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43
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44 HEADER_PREFIX_KEY = 'header_prefix'
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45 METADATA_PREFIX_KEY = 'metadata_prefix'
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46
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47 AWS_HEADER_PREFIX = 'x-amz-'
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48 GOOG_HEADER_PREFIX = 'x-goog-'
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49
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50 ACL_HEADER_KEY = 'acl-header'
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51 AUTH_HEADER_KEY = 'auth-header'
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52 COPY_SOURCE_HEADER_KEY = 'copy-source-header'
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53 COPY_SOURCE_VERSION_ID_HEADER_KEY = 'copy-source-version-id-header'
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54 COPY_SOURCE_RANGE_HEADER_KEY = 'copy-source-range-header'
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55 DELETE_MARKER_HEADER_KEY = 'delete-marker-header'
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56 DATE_HEADER_KEY = 'date-header'
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57 METADATA_DIRECTIVE_HEADER_KEY = 'metadata-directive-header'
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58 RESUMABLE_UPLOAD_HEADER_KEY = 'resumable-upload-header'
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59 SECURITY_TOKEN_HEADER_KEY = 'security-token-header'
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60 STORAGE_CLASS_HEADER_KEY = 'storage-class'
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61 MFA_HEADER_KEY = 'mfa-header'
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62 SERVER_SIDE_ENCRYPTION_KEY = 'server-side-encryption-header'
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63 VERSION_ID_HEADER_KEY = 'version-id-header'
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64 RESTORE_HEADER_KEY = 'restore-header'
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65
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66 STORAGE_COPY_ERROR = 'StorageCopyError'
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67 STORAGE_CREATE_ERROR = 'StorageCreateError'
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68 STORAGE_DATA_ERROR = 'StorageDataError'
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69 STORAGE_PERMISSIONS_ERROR = 'StoragePermissionsError'
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70 STORAGE_RESPONSE_ERROR = 'StorageResponseError'
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71 NO_CREDENTIALS_PROVIDED = object()
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72
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73
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74 class ProfileNotFoundError(ValueError):
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75 pass
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76
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77
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78 class Provider(object):
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79
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80 CredentialMap = {
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81 'aws': ('aws_access_key_id', 'aws_secret_access_key',
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82 'aws_security_token', 'aws_profile'),
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83 'google': ('gs_access_key_id', 'gs_secret_access_key',
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84 None, None),
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85 }
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86
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87 AclClassMap = {
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88 'aws': Policy,
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89 'google': ACL
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90 }
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91
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92 CannedAclsMap = {
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93 'aws': CannedS3ACLStrings,
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94 'google': CannedGSACLStrings
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95 }
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96
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97 HostKeyMap = {
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98 'aws': 's3',
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99 'google': 'gs'
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100 }
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101
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102 ChunkedTransferSupport = {
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103 'aws': False,
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104 'google': True
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105 }
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106
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107 MetadataServiceSupport = {
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108 'aws': True,
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109 'google': False
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110 }
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111
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112 # If you update this map please make sure to put "None" for the
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113 # right-hand-side for any headers that don't apply to a provider, rather
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114 # than simply leaving that header out (which would cause KeyErrors).
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115 HeaderInfoMap = {
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116 'aws': {
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117 HEADER_PREFIX_KEY: AWS_HEADER_PREFIX,
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118 METADATA_PREFIX_KEY: AWS_HEADER_PREFIX + 'meta-',
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119 ACL_HEADER_KEY: AWS_HEADER_PREFIX + 'acl',
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120 AUTH_HEADER_KEY: 'AWS',
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121 COPY_SOURCE_HEADER_KEY: AWS_HEADER_PREFIX + 'copy-source',
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122 COPY_SOURCE_VERSION_ID_HEADER_KEY: AWS_HEADER_PREFIX +
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123 'copy-source-version-id',
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124 COPY_SOURCE_RANGE_HEADER_KEY: AWS_HEADER_PREFIX +
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125 'copy-source-range',
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126 DATE_HEADER_KEY: AWS_HEADER_PREFIX + 'date',
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127 DELETE_MARKER_HEADER_KEY: AWS_HEADER_PREFIX + 'delete-marker',
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128 METADATA_DIRECTIVE_HEADER_KEY: AWS_HEADER_PREFIX +
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129 'metadata-directive',
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130 RESUMABLE_UPLOAD_HEADER_KEY: None,
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131 SECURITY_TOKEN_HEADER_KEY: AWS_HEADER_PREFIX + 'security-token',
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132 SERVER_SIDE_ENCRYPTION_KEY: AWS_HEADER_PREFIX +
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133 'server-side-encryption',
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134 VERSION_ID_HEADER_KEY: AWS_HEADER_PREFIX + 'version-id',
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135 STORAGE_CLASS_HEADER_KEY: AWS_HEADER_PREFIX + 'storage-class',
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136 MFA_HEADER_KEY: AWS_HEADER_PREFIX + 'mfa',
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137 RESTORE_HEADER_KEY: AWS_HEADER_PREFIX + 'restore',
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138 },
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139 'google': {
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140 HEADER_PREFIX_KEY: GOOG_HEADER_PREFIX,
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141 METADATA_PREFIX_KEY: GOOG_HEADER_PREFIX + 'meta-',
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142 ACL_HEADER_KEY: GOOG_HEADER_PREFIX + 'acl',
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143 AUTH_HEADER_KEY: 'GOOG1',
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144 COPY_SOURCE_HEADER_KEY: GOOG_HEADER_PREFIX + 'copy-source',
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145 COPY_SOURCE_VERSION_ID_HEADER_KEY: GOOG_HEADER_PREFIX +
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146 'copy-source-version-id',
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147 COPY_SOURCE_RANGE_HEADER_KEY: None,
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148 DATE_HEADER_KEY: GOOG_HEADER_PREFIX + 'date',
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149 DELETE_MARKER_HEADER_KEY: GOOG_HEADER_PREFIX + 'delete-marker',
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150 METADATA_DIRECTIVE_HEADER_KEY: GOOG_HEADER_PREFIX +
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151 'metadata-directive',
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152 RESUMABLE_UPLOAD_HEADER_KEY: GOOG_HEADER_PREFIX + 'resumable',
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153 SECURITY_TOKEN_HEADER_KEY: GOOG_HEADER_PREFIX + 'security-token',
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154 SERVER_SIDE_ENCRYPTION_KEY: None,
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155 # Note that this version header is not to be confused with
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156 # the Google Cloud Storage 'x-goog-api-version' header.
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157 VERSION_ID_HEADER_KEY: GOOG_HEADER_PREFIX + 'version-id',
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158 STORAGE_CLASS_HEADER_KEY: GOOG_HEADER_PREFIX + 'storage-class',
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159 MFA_HEADER_KEY: None,
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160 RESTORE_HEADER_KEY: None,
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161 }
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162 }
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163
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164 ErrorMap = {
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165 'aws': {
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166 STORAGE_COPY_ERROR: boto.exception.S3CopyError,
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167 STORAGE_CREATE_ERROR: boto.exception.S3CreateError,
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168 STORAGE_DATA_ERROR: boto.exception.S3DataError,
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169 STORAGE_PERMISSIONS_ERROR: boto.exception.S3PermissionsError,
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170 STORAGE_RESPONSE_ERROR: boto.exception.S3ResponseError,
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171 },
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172 'google': {
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173 STORAGE_COPY_ERROR: boto.exception.GSCopyError,
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174 STORAGE_CREATE_ERROR: boto.exception.GSCreateError,
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175 STORAGE_DATA_ERROR: boto.exception.GSDataError,
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176 STORAGE_PERMISSIONS_ERROR: boto.exception.GSPermissionsError,
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177 STORAGE_RESPONSE_ERROR: boto.exception.GSResponseError,
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178 }
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179 }
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180
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181 def __init__(self, name, access_key=None, secret_key=None,
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182 security_token=None, profile_name=None):
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183 self.host = None
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184 self.port = None
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185 self.host_header = None
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186 self.access_key = access_key
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187 self.secret_key = secret_key
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188 self.security_token = security_token
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189 self.profile_name = profile_name
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190 self.name = name
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191 self.acl_class = self.AclClassMap[self.name]
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192 self.canned_acls = self.CannedAclsMap[self.name]
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193 self._credential_expiry_time = None
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194
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195 # Load shared credentials file if it exists
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196 shared_path = os.path.join(expanduser('~'), '.' + name, 'credentials')
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197 self.shared_credentials = Config(do_load=False)
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198 if os.path.isfile(shared_path):
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199 self.shared_credentials.load_from_path(shared_path)
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200
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201 self.get_credentials(access_key, secret_key, security_token, profile_name)
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202 self.configure_headers()
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203 self.configure_errors()
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204
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205 # Allow config file to override default host and port.
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206 host_opt_name = '%s_host' % self.HostKeyMap[self.name]
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207 if config.has_option('Credentials', host_opt_name):
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208 self.host = config.get('Credentials', host_opt_name)
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209 port_opt_name = '%s_port' % self.HostKeyMap[self.name]
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210 if config.has_option('Credentials', port_opt_name):
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211 self.port = config.getint('Credentials', port_opt_name)
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212 host_header_opt_name = '%s_host_header' % self.HostKeyMap[self.name]
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213 if config.has_option('Credentials', host_header_opt_name):
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214 self.host_header = config.get('Credentials', host_header_opt_name)
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215
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216 def get_access_key(self):
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217 if self._credentials_need_refresh():
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218 self._populate_keys_from_metadata_server()
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219 return self._access_key
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220
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221 def set_access_key(self, value):
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222 self._access_key = value
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223
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224 access_key = property(get_access_key, set_access_key)
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225
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226 def get_secret_key(self):
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227 if self._credentials_need_refresh():
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228 self._populate_keys_from_metadata_server()
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229 return self._secret_key
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230
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231 def set_secret_key(self, value):
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232 self._secret_key = value
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233
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234 secret_key = property(get_secret_key, set_secret_key)
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235
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236 def get_security_token(self):
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237 if self._credentials_need_refresh():
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238 self._populate_keys_from_metadata_server()
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239 return self._security_token
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240
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241 def set_security_token(self, value):
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242 self._security_token = value
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243
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244 security_token = property(get_security_token, set_security_token)
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245
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246 def _credentials_need_refresh(self):
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247 if self._credential_expiry_time is None:
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248 return False
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249 else:
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250 # The credentials should be refreshed if they're going to expire
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251 # in less than 5 minutes.
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252 delta = self._credential_expiry_time - datetime.utcnow()
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253 # python2.6 does not have timedelta.total_seconds() so we have
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254 # to calculate this ourselves. This is straight from the
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255 # datetime docs.
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256 seconds_left = (
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257 (delta.microseconds + (delta.seconds + delta.days * 24 * 3600)
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258 * 10 ** 6) / 10 ** 6)
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259 if seconds_left < (5 * 60):
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260 boto.log.debug("Credentials need to be refreshed.")
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261 return True
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262 else:
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263 return False
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264
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265 def get_credentials(self, access_key=None, secret_key=None,
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266 security_token=None, profile_name=None):
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267 access_key_name, secret_key_name, security_token_name, \
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268 profile_name_name = self.CredentialMap[self.name]
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269
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270 # Load profile from shared environment variable if it was not
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271 # already passed in and the environment variable exists
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272 if profile_name is None and profile_name_name is not None and \
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273 profile_name_name.upper() in os.environ:
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274 profile_name = os.environ[profile_name_name.upper()]
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275
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276 shared = self.shared_credentials
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277
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278 if access_key is not None:
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279 self.access_key = access_key
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280 boto.log.debug("Using access key provided by client.")
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281 elif access_key_name.upper() in os.environ:
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282 self.access_key = os.environ[access_key_name.upper()]
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283 boto.log.debug("Using access key found in environment variable.")
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284 elif profile_name is not None:
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285 if shared.has_option(profile_name, access_key_name):
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286 self.access_key = shared.get(profile_name, access_key_name)
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287 boto.log.debug("Using access key found in shared credential "
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288 "file for profile %s." % profile_name)
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289 elif config.has_option("profile %s" % profile_name,
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290 access_key_name):
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291 self.access_key = config.get("profile %s" % profile_name,
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292 access_key_name)
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293 boto.log.debug("Using access key found in config file: "
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294 "profile %s." % profile_name)
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295 else:
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296 raise ProfileNotFoundError('Profile "%s" not found!' %
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297 profile_name)
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298 elif shared.has_option('default', access_key_name):
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299 self.access_key = shared.get('default', access_key_name)
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300 boto.log.debug("Using access key found in shared credential file.")
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301 elif config.has_option('Credentials', access_key_name):
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302 self.access_key = config.get('Credentials', access_key_name)
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303 boto.log.debug("Using access key found in config file.")
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304
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305 if secret_key is not None:
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306 self.secret_key = secret_key
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307 boto.log.debug("Using secret key provided by client.")
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308 elif secret_key_name.upper() in os.environ:
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309 self.secret_key = os.environ[secret_key_name.upper()]
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310 boto.log.debug("Using secret key found in environment variable.")
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311 elif profile_name is not None:
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312 if shared.has_option(profile_name, secret_key_name):
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313 self.secret_key = shared.get(profile_name, secret_key_name)
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314 boto.log.debug("Using secret key found in shared credential "
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315 "file for profile %s." % profile_name)
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316 elif config.has_option("profile %s" % profile_name, secret_key_name):
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317 self.secret_key = config.get("profile %s" % profile_name,
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318 secret_key_name)
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319 boto.log.debug("Using secret key found in config file: "
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320 "profile %s." % profile_name)
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321 else:
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322 raise ProfileNotFoundError('Profile "%s" not found!' %
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323 profile_name)
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324 elif shared.has_option('default', secret_key_name):
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325 self.secret_key = shared.get('default', secret_key_name)
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326 boto.log.debug("Using secret key found in shared credential file.")
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327 elif config.has_option('Credentials', secret_key_name):
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328 self.secret_key = config.get('Credentials', secret_key_name)
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329 boto.log.debug("Using secret key found in config file.")
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330 elif config.has_option('Credentials', 'keyring'):
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331 keyring_name = config.get('Credentials', 'keyring')
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332 try:
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333 import keyring
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334 except ImportError:
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335 boto.log.error("The keyring module could not be imported. "
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336 "For keyring support, install the keyring "
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337 "module.")
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338 raise
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339 self.secret_key = keyring.get_password(
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340 keyring_name, self.access_key)
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341 boto.log.debug("Using secret key found in keyring.")
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342
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343 if security_token is not None:
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344 self.security_token = security_token
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345 boto.log.debug("Using security token provided by client.")
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346 elif ((security_token_name is not None) and
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347 (access_key is None) and (secret_key is None)):
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348 # Only provide a token from the environment/config if the
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349 # caller did not specify a key and secret. Otherwise an
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350 # environment/config token could be paired with a
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351 # different set of credentials provided by the caller
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352 if security_token_name.upper() in os.environ:
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353 self.security_token = os.environ[security_token_name.upper()]
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354 boto.log.debug("Using security token found in environment"
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355 " variable.")
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356 elif shared.has_option(profile_name or 'default',
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357 security_token_name):
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358 self.security_token = shared.get(profile_name or 'default',
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359 security_token_name)
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360 boto.log.debug("Using security token found in shared "
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361 "credential file.")
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362 elif profile_name is not None:
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363 if config.has_option("profile %s" % profile_name,
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364 security_token_name):
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365 boto.log.debug("config has option")
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366 self.security_token = config.get("profile %s" % profile_name,
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367 security_token_name)
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368 boto.log.debug("Using security token found in config file: "
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369 "profile %s." % profile_name)
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370 elif config.has_option('Credentials', security_token_name):
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371 self.security_token = config.get('Credentials',
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372 security_token_name)
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373 boto.log.debug("Using security token found in config file.")
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374
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375 if ((self._access_key is None or self._secret_key is None) and
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376 self.MetadataServiceSupport[self.name]):
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377 self._populate_keys_from_metadata_server()
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378 self._secret_key = self._convert_key_to_str(self._secret_key)
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379
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380 def _populate_keys_from_metadata_server(self):
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381 # get_instance_metadata is imported here because of a circular
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382 # dependency.
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383 boto.log.debug("Retrieving credentials from metadata server.")
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384 from boto.utils import get_instance_metadata
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385 timeout = config.getfloat('Boto', 'metadata_service_timeout', 1.0)
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386 attempts = config.getint('Boto', 'metadata_service_num_attempts', 1)
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387 # The num_retries arg is actually the total number of attempts made,
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388 # so the config options is named *_num_attempts to make this more
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389 # clear to users.
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390 metadata = get_instance_metadata(
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391 timeout=timeout, num_retries=attempts,
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392 data='meta-data/iam/security-credentials/')
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393 if metadata:
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394 creds = self._get_credentials_from_metadata(metadata)
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395 self._access_key = creds[0]
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396 self._secret_key = creds[1]
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397 self._security_token = creds[2]
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398 expires_at = creds[3]
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399 # I'm assuming there's only one role on the instance profile.
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400 self._credential_expiry_time = datetime.strptime(
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401 expires_at, "%Y-%m-%dT%H:%M:%SZ")
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402 boto.log.debug("Retrieved credentials will expire in %s at: %s",
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403 self._credential_expiry_time - datetime.now(),
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404 expires_at)
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405
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406 def _get_credentials_from_metadata(self, metadata):
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407 # Given metadata, return a tuple of (access, secret, token, expiration)
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408 # On errors, an InvalidInstanceMetadataError will be raised.
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409 # The "metadata" is a lazy loaded dictionary means that it's possible
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410 # to still encounter errors as we traverse through the metadata dict.
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411 # We try to be careful and raise helpful error messages when this
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412 # happens.
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413 creds = list(metadata.values())[0]
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414 if not isinstance(creds, dict):
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415 # We want to special case a specific error condition which is
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416 # where get_instance_metadata() returns an empty string on
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417 # error conditions.
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418 if creds == '':
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419 msg = 'an empty string'
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420 else:
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421 msg = 'type: %s' % creds
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422 raise InvalidInstanceMetadataError("Expected a dict type of "
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423 "credentials instead received "
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424 "%s" % (msg))
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425 try:
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426 access_key = creds['AccessKeyId']
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427 secret_key = self._convert_key_to_str(creds['SecretAccessKey'])
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428 security_token = creds['Token']
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429 expires_at = creds['Expiration']
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430 except KeyError as e:
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431 raise InvalidInstanceMetadataError(
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432 "Credentials from instance metadata missing "
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433 "required key: %s" % e)
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434 return access_key, secret_key, security_token, expires_at
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435
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436 def _convert_key_to_str(self, key):
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437 if isinstance(key, six.text_type):
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438 # the secret key must be bytes and not unicode to work
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439 # properly with hmac.new (see http://bugs.python.org/issue5285)
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440 return str(key)
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441 return key
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442
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443 def configure_headers(self):
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444 header_info_map = self.HeaderInfoMap[self.name]
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445 self.metadata_prefix = header_info_map[METADATA_PREFIX_KEY]
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446 self.header_prefix = header_info_map[HEADER_PREFIX_KEY]
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447 self.acl_header = header_info_map[ACL_HEADER_KEY]
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448 self.auth_header = header_info_map[AUTH_HEADER_KEY]
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449 self.copy_source_header = header_info_map[COPY_SOURCE_HEADER_KEY]
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450 self.copy_source_version_id = header_info_map[
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451 COPY_SOURCE_VERSION_ID_HEADER_KEY]
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452 self.copy_source_range_header = header_info_map[
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453 COPY_SOURCE_RANGE_HEADER_KEY]
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454 self.date_header = header_info_map[DATE_HEADER_KEY]
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455 self.delete_marker = header_info_map[DELETE_MARKER_HEADER_KEY]
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456 self.metadata_directive_header = (
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457 header_info_map[METADATA_DIRECTIVE_HEADER_KEY])
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458 self.security_token_header = header_info_map[SECURITY_TOKEN_HEADER_KEY]
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459 self.resumable_upload_header = (
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460 header_info_map[RESUMABLE_UPLOAD_HEADER_KEY])
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461 self.server_side_encryption_header = header_info_map[SERVER_SIDE_ENCRYPTION_KEY]
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462 self.storage_class_header = header_info_map[STORAGE_CLASS_HEADER_KEY]
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463 self.version_id = header_info_map[VERSION_ID_HEADER_KEY]
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464 self.mfa_header = header_info_map[MFA_HEADER_KEY]
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465 self.restore_header = header_info_map[RESTORE_HEADER_KEY]
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466
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467 def configure_errors(self):
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468 error_map = self.ErrorMap[self.name]
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469 self.storage_copy_error = error_map[STORAGE_COPY_ERROR]
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470 self.storage_create_error = error_map[STORAGE_CREATE_ERROR]
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471 self.storage_data_error = error_map[STORAGE_DATA_ERROR]
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472 self.storage_permissions_error = error_map[STORAGE_PERMISSIONS_ERROR]
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473 self.storage_response_error = error_map[STORAGE_RESPONSE_ERROR]
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474
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475 def get_provider_name(self):
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476 return self.HostKeyMap[self.name]
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477
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478 def supports_chunked_transfer(self):
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479 return self.ChunkedTransferSupport[self.name]
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480
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481
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482 # Static utility method for getting default Provider.
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483 def get_default():
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484 return Provider('aws')