Mercurial > hg > orthanc-object-storage
annotate Azure/AzureBlobStoragePlugin.cpp @ 48:ff113c3561c5
coding style + doc
| author | Alain Mazy <am@osimis.io> |
|---|---|
| date | Fri, 02 Apr 2021 09:46:41 +0200 |
| parents | 1691da4ae9c3 |
| children | b922ae86bbe1 |
| rev | line source |
|---|---|
| 1 | 1 /** |
| 2 * Cloud storage plugins for Orthanc | |
|
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3 * Copyright (C) 2020-2021 Osimis S.A., Belgium |
| 1 | 4 * |
| 5 * This program is free software: you can redistribute it and/or | |
| 6 * modify it under the terms of the GNU Affero General Public License | |
| 7 * as published by the Free Software Foundation, either version 3 of | |
| 8 * the License, or (at your option) any later version. | |
| 9 * | |
| 10 * This program is distributed in the hope that it will be useful, but | |
| 11 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 * Affero General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU Affero General Public License | |
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 **/ | |
| 18 | |
| 19 #include "AzureBlobStoragePlugin.h" | |
| 20 | |
| 21 #include <was/storage_account.h> | |
| 22 #include <was/blob.h> | |
| 23 #include <boost/lexical_cast.hpp> | |
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24 #include <boost/algorithm/string.hpp> |
| 1 | 25 #include "cpprest/rawptrstream.h" |
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26 #include "cpprest/details/basic_types.h" |
| 1 | 27 |
| 28 | |
| 29 // Create aliases to make the code easier to read. | |
| 30 namespace as = azure::storage; | |
| 15 | 31 static const char* const PLUGIN_SECTION = "AzureBlobStorage"; |
| 1 | 32 |
| 15 | 33 class AzureBlobStoragePlugin : public BaseStoragePlugin |
| 1 | 34 { |
| 35 public: | |
| 36 | |
| 37 as::cloud_blob_client blobClient_; | |
| 38 as::cloud_blob_container blobContainer_; | |
| 39 public: | |
| 40 | |
| 41 // AzureBlobStoragePlugin(const std::string& connectionString, | |
| 42 // const std::string& containerName | |
| 43 // ); | |
| 15 | 44 AzureBlobStoragePlugin(const as::cloud_blob_client& blobClient, const as::cloud_blob_container& blobContainer, bool enableLegacyStorageStructure); |
| 1 | 45 |
| 46 virtual IWriter* GetWriterForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled); | |
| 47 virtual IReader* GetReaderForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled); | |
| 48 virtual void DeleteObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled); | |
| 15 | 49 virtual const char* GetConfigurationSectionName() {return PLUGIN_SECTION;}; |
| 1 | 50 }; |
| 51 | |
| 52 | |
| 53 class Writer : public IStoragePlugin::IWriter | |
| 54 { | |
| 55 std::string path_; | |
| 56 as::cloud_blob_client client_; | |
| 57 as::cloud_blob_container container_; | |
| 58 | |
| 59 public: | |
| 60 Writer(const as::cloud_blob_container& container, const std::string& path, const as::cloud_blob_client& client) | |
| 61 : path_(path), | |
| 62 client_(client), | |
| 63 container_(container) | |
| 64 { | |
| 65 } | |
| 66 | |
| 67 virtual ~Writer() | |
| 68 { | |
| 69 } | |
| 70 | |
| 71 virtual void Write(const char* data, size_t size) | |
| 72 { | |
| 73 try | |
| 74 { | |
| 75 concurrency::streams::istream inputStream = concurrency::streams::rawptr_stream<uint8_t>::open_istream(reinterpret_cast<const uint8_t*>(data), size); | |
| 34 | 76 azure::storage::cloud_block_blob blob = container_.get_block_blob_reference(utility::conversions::to_string_t(path_)); |
| 1 | 77 blob.upload_from_stream(inputStream); |
| 78 inputStream.close().wait(); | |
| 79 } | |
| 80 catch (std::exception& ex) | |
| 81 { | |
| 82 throw StoragePluginException("AzureBlobStorage: error writing file " + std::string(path_) + ": " + ex.what()); | |
| 83 } | |
| 84 } | |
| 85 }; | |
| 86 | |
| 87 | |
| 88 class Reader : public IStoragePlugin::IReader | |
| 89 { | |
| 90 std::string path_; | |
| 91 as::cloud_blob_client client_; | |
| 92 as::cloud_blob_container container_; | |
| 93 as::cloud_block_blob block_; | |
| 94 | |
| 95 public: | |
| 96 Reader(const as::cloud_blob_container& container, const std::string& path, const as::cloud_blob_client& client) | |
| 97 : path_(path), | |
| 98 client_(client), | |
| 99 container_(container) | |
| 100 { | |
| 101 try | |
| 102 { | |
| 34 | 103 block_ = container_.get_block_blob_reference(utility::conversions::to_string_t(path_)); |
| 1 | 104 block_.download_attributes(); // to retrieve the properties |
| 105 } | |
| 106 catch (std::exception& ex) | |
| 107 { | |
| 108 throw StoragePluginException("AzureBlobStorage: error opening file for reading " + std::string(path_) + ": " + ex.what()); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 virtual ~Reader() | |
| 113 { | |
| 114 | |
| 115 } | |
| 116 virtual size_t GetSize() | |
| 117 { | |
| 118 try | |
| 119 { | |
| 120 return block_.properties().size(); | |
| 121 } | |
| 122 catch (std::exception& ex) | |
| 123 { | |
| 124 throw StoragePluginException("AzureBlobStorage: error while reading file " + std::string(path_) + ": " + ex.what()); | |
| 125 } | |
| 126 } | |
| 127 | |
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128 virtual void ReadWhole(char* data, size_t size) |
| 1 | 129 { |
| 130 try | |
| 131 { | |
| 132 concurrency::streams::ostream outputStream = concurrency::streams::rawptr_stream<uint8_t>::open_ostream(reinterpret_cast<uint8_t*>(data), size); | |
| 133 | |
| 134 block_.download_to_stream(outputStream); | |
| 135 } | |
| 136 catch (std::exception& ex) | |
| 137 { | |
| 138 throw StoragePluginException("AzureBlobStorage: error while reading file " + std::string(path_) + ": " + ex.what()); | |
| 139 } | |
| 140 } | |
| 141 | |
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142 virtual void ReadRange(char* data, size_t size, size_t fromOffset) |
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143 { |
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144 try |
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145 { |
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146 concurrency::streams::ostream outputStream = concurrency::streams::rawptr_stream<uint8_t>::open_ostream(reinterpret_cast<uint8_t*>(data), size); |
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147 |
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148 block_.download_range_to_stream(outputStream, fromOffset, size); |
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149 } |
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150 catch (std::exception& ex) |
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151 { |
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152 throw StoragePluginException("AzureBlobStorage: error while reading partial file " + std::string(path_) + ": " + ex.what()); |
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153 } |
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154 } |
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155 |
| 1 | 156 }; |
| 157 | |
| 158 | |
| 159 | |
| 160 const char* AzureBlobStoragePluginFactory::GetStoragePluginName() | |
| 161 { | |
| 162 return "Azure Blob Storage"; | |
| 163 } | |
| 164 | |
| 48 | 165 bool IsSasTokenAccountLevel(utility::string_t sasToken) |
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166 { |
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167 // Use cpprestsdk's utility::string_t here since the expected argument is the return value of |
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168 // as::storage_credentials::sas_token(), which is type utility::string_t |
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169 size_t newIdx = 0; |
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170 size_t prevIdx = 0; |
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171 while ((newIdx = sasToken.find('&', prevIdx)) != utility::string_t::npos) |
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172 { |
| 48 | 173 utility::string_t kvpair = sasToken.substr(prevIdx, newIdx - prevIdx); |
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174 prevIdx = newIdx + 1; // start next time from char after '&' |
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175 |
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176 size_t equalsIdx = kvpair.find('='); |
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177 utility::string_t key = kvpair.substr(0, equalsIdx); |
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178 if (key == "srt") // only account SAS has this parameter |
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179 return true; |
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180 } |
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181 |
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182 return false; |
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183 } |
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184 |
| 1 | 185 IStoragePlugin* AzureBlobStoragePluginFactory::CreateStoragePlugin(const OrthancPlugins::OrthancConfiguration& orthancConfig) |
| 186 { | |
| 187 std::string connectionString; | |
| 188 std::string containerName; | |
| 15 | 189 bool enableLegacyStorageStructure; |
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190 bool createContainerIfNotExists; |
| 1 | 191 |
| 192 if (orthancConfig.IsSection(PLUGIN_SECTION)) | |
| 193 { | |
| 194 OrthancPlugins::OrthancConfiguration pluginSection; | |
| 195 orthancConfig.GetSection(pluginSection, PLUGIN_SECTION); | |
| 196 | |
| 15 | 197 if (!BaseStoragePlugin::ReadCommonConfiguration(enableLegacyStorageStructure, pluginSection)) |
| 198 { | |
| 199 return nullptr; | |
| 200 } | |
| 201 | |
| 1 | 202 if (!pluginSection.LookupStringValue(connectionString, "ConnectionString")) |
| 203 { | |
| 204 OrthancPlugins::LogError("AzureBlobStorage/ConnectionString configuration missing. Unable to initialize plugin"); | |
| 205 return nullptr; | |
| 206 } | |
| 207 | |
| 208 if (!pluginSection.LookupStringValue(containerName, "ContainerName")) | |
| 209 { | |
| 210 OrthancPlugins::LogError("AzureBlobStorage/ContainerName configuration missing. Unable to initialize plugin"); | |
| 211 return nullptr; | |
| 212 } | |
| 213 | |
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214 boost::trim(connectionString); // without that, if there's an EOL in the string, it fails with "provided uri is invalid" |
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215 boost::trim(containerName); |
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216 |
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217 createContainerIfNotExists = pluginSection.GetBooleanValue("CreateContainerIfNotExists", true); |
| 1 | 218 } |
| 219 else if (orthancConfig.IsSection("BlobStorage")) // backward compatibility with the old plugin: | |
| 220 { | |
| 221 OrthancPlugins::LogWarning("AzureBlobStorage: you're using an old configuration format for the plugin."); | |
| 222 | |
| 223 OrthancPlugins::OrthancConfiguration pluginSection; | |
| 224 orthancConfig.GetSection(pluginSection, "BlobStorage"); | |
| 225 | |
| 226 std::string accountName; | |
| 227 std::string accountKey; | |
| 228 | |
| 229 if (!pluginSection.LookupStringValue(containerName, "ContainerName")) | |
| 230 { | |
| 231 OrthancPlugins::LogError("BlobStorage/AccountName configuration missing. Unable to initialize plugin"); | |
| 232 return nullptr; | |
| 233 } | |
| 234 | |
| 235 if (!pluginSection.LookupStringValue(accountName, "AccountName")) | |
| 236 { | |
| 237 OrthancPlugins::LogError("BlobStorage/AccountName configuration missing. Unable to initialize plugin"); | |
| 238 return nullptr; | |
| 239 } | |
| 240 | |
| 241 if (!pluginSection.LookupStringValue(accountKey, "AccountKey")) | |
| 242 { | |
| 243 OrthancPlugins::LogError("BlobStorage/ContainerName configuration missing. Unable to initialize plugin"); | |
| 244 return nullptr; | |
| 245 } | |
| 246 | |
| 247 std::ostringstream connectionStringBuilder; | |
| 248 connectionStringBuilder << "DefaultEndpointsProtocol=https;AccountName=" << accountName << ";AccountKey=" << accountKey; | |
| 249 connectionString = connectionStringBuilder.str(); | |
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250 |
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251 createContainerIfNotExists = pluginSection.GetBooleanValue("CreateContainerIfNotExists", true); |
| 1 | 252 } |
| 253 else | |
| 254 { | |
| 255 OrthancPlugins::LogWarning(std::string(GetStoragePluginName()) + " plugin, section missing. Plugin is not enabled."); | |
| 256 return nullptr; | |
| 257 } | |
| 258 | |
| 259 try | |
| 260 { | |
| 11 | 261 OrthancPlugins::LogInfo("Connecting to Azure storage ..."); |
| 262 | |
| 34 | 263 as::cloud_storage_account storageAccount = as::cloud_storage_account::parse(utility::conversions::to_string_t(connectionString)); |
| 11 | 264 OrthancPlugins::LogInfo("Storage account created"); |
| 1 | 265 |
| 266 as::cloud_blob_client blobClient = storageAccount.create_cloud_blob_client(); | |
| 11 | 267 OrthancPlugins::LogInfo("Blob client created"); |
| 268 | |
| 34 | 269 as::cloud_blob_container blobContainer = blobClient.get_container_reference(utility::conversions::to_string_t(containerName)); |
| 11 | 270 OrthancPlugins::LogInfo("Accessing blob container"); |
| 1 | 271 |
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272 // blobContainer.create_if_not_exists() throws an error if a service SAS (for a blob container) |
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273 // was used in the connectionString. |
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274 // Only allow the use of this function when using storage account-level credentials, whether |
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275 // through accountName/accountKey combo or account SAS. |
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276 if ((storageAccount.credentials().is_account_key() || |
| 48 | 277 (storageAccount.credentials().is_sas() && IsSasTokenAccountLevel(storageAccount.credentials().sas_token()))) |
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278 && createContainerIfNotExists) |
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279 { |
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280 // Return value is true if the container did not exist and was successfully created. |
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281 bool containerCreated = blobContainer.create_if_not_exists(); |
| 1 | 282 |
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283 if (containerCreated) |
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284 { |
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285 OrthancPlugins::LogWarning("Blob Storage Area container has been created. **** check in the Azure console that your container is private ****"); |
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286 } |
| 1 | 287 } |
| 288 | |
| 289 OrthancPlugins::LogInfo("Blob storage initialized"); | |
| 290 | |
| 15 | 291 return new AzureBlobStoragePlugin(blobClient, blobContainer, enableLegacyStorageStructure); |
| 1 | 292 } |
| 293 catch (const std::exception& e) | |
| 294 { | |
| 295 OrthancPlugins::LogError(std::string("AzureBlobStorage plugin: failed to initialize plugin: ") + e.what()); | |
| 296 return nullptr; | |
| 297 } | |
| 298 | |
| 299 } | |
| 300 | |
| 15 | 301 AzureBlobStoragePlugin::AzureBlobStoragePlugin(const as::cloud_blob_client& blobClient, const as::cloud_blob_container& blobContainer, bool enableLegacyStorageStructure) |
| 302 : BaseStoragePlugin(enableLegacyStorageStructure), | |
| 303 blobClient_(blobClient), | |
| 1 | 304 blobContainer_(blobContainer) |
| 305 { | |
| 306 | |
| 307 } | |
| 308 | |
| 309 IStoragePlugin::IWriter* AzureBlobStoragePlugin::GetWriterForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled) | |
| 310 { | |
| 311 return new Writer(blobContainer_, GetPath(uuid, type, encryptionEnabled), blobClient_); | |
| 312 } | |
| 313 | |
| 314 IStoragePlugin::IReader* AzureBlobStoragePlugin::GetReaderForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled) | |
| 315 { | |
| 316 return new Reader(blobContainer_, GetPath(uuid, type, encryptionEnabled), blobClient_); | |
| 317 } | |
| 318 | |
| 319 void AzureBlobStoragePlugin::DeleteObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled) | |
| 320 { | |
| 321 std::string path = GetPath(uuid, type, encryptionEnabled); | |
| 322 | |
| 323 try | |
| 324 { | |
| 34 | 325 as::cloud_block_blob blockBlob = blobContainer_.get_block_blob_reference(utility::conversions::to_string_t(path)); |
| 1 | 326 |
| 327 blockBlob.delete_blob(); | |
| 328 } | |
| 329 catch (std::exception& ex) | |
| 330 { | |
| 331 throw StoragePluginException("AzureBlobStorage: error while deleting file " + std::string(path) + ": " + ex.what()); | |
| 332 } | |
| 333 } |