Mercurial > hg > orthanc-object-storage

annotate Google/GoogleStoragePlugin.cpp @ 109:2549eecdc996

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updated minimum cmake version for Azure & Google
author Alain Mazy <am@osimis.io>
date Tue, 10 Oct 2023 15:15:04 +0200
parents 1bc055199cd2
children 407bd022b0cf
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1 /**
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2 * Cloud storage plugins for Orthanc
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3 * Copyright (C) 2020-2021 Osimis S.A., Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18
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19
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20 #include "GoogleStoragePlugin.h"
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21
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22 #include "google/cloud/storage/client.h"
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23
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24 // Create aliases to make the code easier to read.
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25 namespace gcs = google::cloud::storage;
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28 class GoogleStoragePlugin : public BaseStorage
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29 {
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30 public:
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32 std::string bucketName_;
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33 google::cloud::storage::Client mainClient_; // the client that is created at startup. Each thread should copy it when it needs it. (from the doc: Instances of this class created via copy-construction or copy-assignment share the underlying pool of connections. Access to these copies via multiple threads is guaranteed to work. Two threads operating on the same instance of this class is not guaranteed to work.)
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34 bool storageContainsUnknownFiles_;
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36 public:
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37
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38 GoogleStoragePlugin(const std::string& nameForLogs,
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39 const std::string& bucketName,
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40 google::cloud::storage::Client& mainClient,
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41 bool enableLegacyStorageStructure,
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42 bool storageContainsUnknownFiles
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43 );
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44
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45 virtual IWriter* GetWriterForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled);
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46 virtual IReader* GetReaderForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled);
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47 virtual void DeleteObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled);
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48 };
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51 class Writer : public IStorage::IWriter
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52 {
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53 std::string path_;
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54 gcs::Client client_;
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55 std::string bucketName_;
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56 gcs::ObjectWriteStream stream_;
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57 public:
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58 Writer(const std::string& bucketName, const std::string& path, gcs::Client& client)
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59 : path_(path),
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60 client_(client),
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61 bucketName_(bucketName)
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62 {
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63 }
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64
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65 virtual ~Writer()
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66 {
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67 }
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68
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69 virtual void Write(const char* data, size_t size)
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70 {
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71 stream_ = client_.WriteObject(bucketName_, path_);
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72
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73 if (stream_)
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74 {
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75 stream_.write(data, size);
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76 stream_.Close();
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77
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78 if (!stream_.metadata())
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79 {
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80 throw StoragePluginException("GoogleCloudStorage: error while writing file " + std::string(path_) + ": " + stream_.metadata().status().message());
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81 }
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82 }
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83 else
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84 {
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85 throw StoragePluginException("GoogleCloudStorage: error while opening/writing file " + std::string(path_) + ": " + stream_.metadata().status().message());
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86 }
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87 }
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88 };
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91 class Reader : public IStorage::IReader
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92 {
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93 std::list<std::string> paths_;
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94 gcs::Client client_;
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95 std::string bucketName_;
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96
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97 public:
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98 Reader(const std::string& bucketName, const std::list<std::string>& paths, gcs::Client& client)
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99 : paths_(paths),
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100 client_(client),
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101 bucketName_(bucketName)
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102 {
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103 }
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104
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105 virtual ~Reader()
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106 {
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107
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108 }
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109
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110 virtual size_t GetSize()
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111 {
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112 std::string firstExceptionMessage;
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113
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114 for (auto& path: paths_)
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115 {
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116 try
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117 {
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118 return _GetSize(path);
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119 }
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120 catch (StoragePluginException& ex)
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121 {
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122 if (firstExceptionMessage.empty())
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123 {
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124 firstExceptionMessage = ex.what();
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125 }
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126 //ignore to retry
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127 }
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128 }
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129 throw StoragePluginException(firstExceptionMessage);
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130 }
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131
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132 void ReadWhole(char* data, size_t size)
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133 {
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134 std::string firstExceptionMessage;
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135
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136 for (auto& path: paths_)
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137 {
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138 try
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139 {
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140 return _ReadWhole(path, data, size);
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141 }
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142 catch (StoragePluginException& ex)
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143 {
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144 if (firstExceptionMessage.empty())
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145 {
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146 firstExceptionMessage = ex.what();
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147 }
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148 //ignore to retry
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149 }
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150 }
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151 throw StoragePluginException(firstExceptionMessage);
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152 }
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153
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154 void ReadRange(char* data, size_t size, size_t fromOffset)
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155 {
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156 std::string firstExceptionMessage;
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157
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158 for (auto& path: paths_)
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159 {
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160 try
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161 {
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162 return _ReadRange(path, data, size, fromOffset);
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163 }
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164 catch (StoragePluginException& ex)
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165 {
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166 if (firstExceptionMessage.empty())
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167 {
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168 firstExceptionMessage = ex.what();
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169 }
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170 //ignore to retry
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171 }
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172 }
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173 throw StoragePluginException(firstExceptionMessage);
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174 }
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175
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176 private:
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177 virtual void _ReadWhole(const std::string& path, char* data, size_t size)
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178 {
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179 auto reader = client_.ReadObject(bucketName_, path);
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180
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181 if (!reader)
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182 {
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183 throw StoragePluginException("error while opening/reading file " + std::string(path) + ": " + reader.status().message());
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184 }
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185
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186 reader.read(data, size);
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187
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188 if (!reader)
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189 {
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190 throw StoragePluginException("error while reading file " + std::string(path) + ": " + reader.status().message());
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191 }
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192 }
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193
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194 virtual void _ReadRange(const std::string& path, char* data, size_t size, size_t fromOffset)
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195 {
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196 auto reader = client_.ReadObject(bucketName_, path, gcs::ReadRange(fromOffset, fromOffset + size));
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197
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198 if (!reader)
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199 {
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200 throw StoragePluginException("error while opening/reading file " + std::string(path) + ": " + reader.status().message());
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201 }
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202
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203 reader.read(data, size);
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204
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205 if (!reader)
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206 {
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207 throw StoragePluginException("error while reading file " + std::string(path) + ": " + reader.status().message());
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208 }
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209 }
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210
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211 size_t _GetSize(const std::string& path)
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212 {
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213 auto objectMetadata = client_.GetObjectMetadata(bucketName_, path);
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214
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215 if (objectMetadata)
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216 {
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217 std::uint64_t fileSize = static_cast<int64_t>(objectMetadata->size());
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218
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219 return fileSize;
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220 }
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221 else
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222 {
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223 throw StoragePluginException("error while getting the size of " + std::string(path) + ": " + objectMetadata.status().message());
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224 }
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225 }
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226
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227 };
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228
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229
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230
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231 const char* GoogleStoragePluginFactory::GetStoragePluginName()
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232 {
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233 return "Google Cloud Storage";
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234 }
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235
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236 const char* GoogleStoragePluginFactory::GetStorageDescription()
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237 {
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238 return "Stores the Orthanc storage area in Google Cloud";
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239 }
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240
79
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241 IStorage* GoogleStoragePluginFactory::CreateStorage(const std::string& nameForLogs, const OrthancPlugins::OrthancConfiguration& orthancConfig)
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242 {
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243 bool enableLegacyStorageStructure;
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244 bool storageContainsUnknownFiles;
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245
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246 if (!orthancConfig.IsSection(GetConfigurationSectionName()))
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247 {
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248 OrthancPlugins::LogWarning(std::string(GetStoragePluginName()) + " plugin, section missing. Plugin is not enabled.");
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249 return nullptr;
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250 }
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251
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252 OrthancPlugins::OrthancConfiguration pluginSection;
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253 orthancConfig.GetSection(pluginSection, GetConfigurationSectionName());
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254
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255 if (!BaseStorage::ReadCommonConfiguration(enableLegacyStorageStructure, storageContainsUnknownFiles, pluginSection))
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256 {
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257 return nullptr;
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258 }
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259
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260 std::string pathToGoogleCredentials;
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261
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262 if (!pluginSection.LookupStringValue(pathToGoogleCredentials, "ServiceAccountFile"))
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263 {
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264 OrthancPlugins::LogError("GoogleCloudStorage/ServiceAccountFile configuration missing. Unable to initialize plugin");
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265 return nullptr;
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266 }
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267
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268 std::string googleBucketName;
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269 if (!pluginSection.LookupStringValue(googleBucketName, "BucketName"))
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270 {
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271 OrthancPlugins::LogError("GoogleCloudStorage/BucketName configuration missing. Unable to initialize plugin");
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272 return nullptr;
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273 }
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274
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275 // Use service account credentials from a JSON keyfile:
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276 auto creds = gcs::oauth2::CreateServiceAccountCredentialsFromJsonFilePath(pathToGoogleCredentials);
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277 if (!creds)
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278 {
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279 OrthancPlugins::LogError("GoogleCloudStorage plugin: unable to validate credentials. Check the ServiceAccountFile: " + creds.status().message());
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280 return nullptr;
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281 }
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282
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283 // Create a client to communicate with Google Cloud Storage.
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284 google::cloud::StatusOr<gcs::Client> mainClient = gcs::Client(gcs::ClientOptions(*creds));
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285
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286 if (!mainClient)
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287 {
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288 OrthancPlugins::LogError("GoogleCloudStorage plugin: unable to create client: " + mainClient.status().message());
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289 return nullptr;
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290 }
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291
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292 return new GoogleStoragePlugin(nameForLogs, googleBucketName, mainClient.value(), enableLegacyStorageStructure, storageContainsUnknownFiles);
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293 }
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294
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295 GoogleStoragePlugin::GoogleStoragePlugin(const std::string& nameForLogs, const std::string &bucketName, google::cloud::storage::Client& mainClient, bool enableLegacyStorageStructure, bool storageContainsUnknownFiles)
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296 : BaseStorage(nameForLogs, enableLegacyStorageStructure),
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297 bucketName_(bucketName),
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298 mainClient_(mainClient),
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299 storageContainsUnknownFiles_(storageContainsUnknownFiles)
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300 {
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301
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302 }
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303
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304 IStorage::IWriter* GoogleStoragePlugin::GetWriterForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled)
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305 {
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306 return new Writer(bucketName_, GetPath(uuid, type, encryptionEnabled), mainClient_);
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307 }
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308
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309 IStorage::IReader* GoogleStoragePlugin::GetReaderForObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled)
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310 {
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311 std::list<std::string> paths;
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312 paths.push_back(GetPath(uuid, type, encryptionEnabled, false));
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313 if (storageContainsUnknownFiles_)
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314 {
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315 paths.push_back(GetPath(uuid, type, encryptionEnabled, true));
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316 }
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317
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318 return new Reader(bucketName_, paths, mainClient_);
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319 }
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320
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321 void GoogleStoragePlugin::DeleteObject(const char* uuid, OrthancPluginContentType type, bool encryptionEnabled)
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322 {
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323 gcs::Client client(mainClient_);
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324
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325 std::string path = GetPath(uuid, type, encryptionEnabled);
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326
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327 auto deletionStatus = client.DeleteObject(bucketName_, path);
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328
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329 if (!deletionStatus.ok())
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330 {
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331 throw StoragePluginException("GoogleCloudStorage: error while deleting file " + std::string(path) + ": " + deletionStatus.message());
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332 }
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333 }