Mercurial > hg > orthanc
annotate Core/FileStorage.cpp @ 196:6d0225a26fd8
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 16 Nov 2012 08:23:05 +0100 |
| parents | 0fadb04728ba |
| children | bee20e978835 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 0 | 3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege, |
| 4 * Belgium | |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 136 | 10 * |
| 11 * In addition, as a special exception, the copyright holders of this | |
| 12 * program give permission to link the code of its release with the | |
| 13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 14 * that use the same license as the "OpenSSL" library), and distribute | |
| 15 * the linked executables. You must obey the GNU General Public License | |
| 16 * in all respects for all of the code used other than "OpenSSL". If you | |
| 17 * modify file(s) with this exception, you may extend this exception to | |
| 18 * your version of the file(s), but you are not obligated to do so. If | |
| 19 * you do not wish to do so, delete this exception statement from your | |
| 20 * version. If you delete this exception statement from all source files | |
| 21 * in the program, then also delete it here. | |
| 0 | 22 * |
| 23 * This program is distributed in the hope that it will be useful, but | |
| 24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 26 * General Public License for more details. | |
| 27 * | |
| 28 * You should have received a copy of the GNU General Public License | |
| 29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 30 **/ | |
| 31 | |
| 32 | |
| 33 #include "FileStorage.h" | |
| 34 | |
| 35 // http://stackoverflow.com/questions/1576272/storing-large-number-of-files-in-file-system | |
| 36 // http://stackoverflow.com/questions/446358/storing-a-large-number-of-images | |
| 37 | |
| 59 | 38 #include "OrthancException.h" |
| 0 | 39 #include "Toolbox.h" |
| 40 #include "Uuid.h" | |
| 41 | |
| 42 #include <boost/filesystem/fstream.hpp> | |
| 43 | |
|
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44 static std::string ToString(const boost::filesystem::path& p) |
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45 { |
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46 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
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47 return p.filename().string(); |
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48 #else |
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49 return p.filename(); |
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50 #endif |
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51 } |
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52 |
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53 |
| 59 | 54 namespace Orthanc |
| 0 | 55 { |
| 56 boost::filesystem::path FileStorage::GetPath(const std::string& uuid) const | |
| 57 { | |
| 58 namespace fs = boost::filesystem; | |
| 59 | |
| 60 if (!Toolbox::IsUuid(uuid)) | |
| 61 { | |
| 59 | 62 throw OrthancException(ErrorCode_ParameterOutOfRange); |
| 0 | 63 } |
| 64 | |
| 65 fs::path path = root_; | |
| 66 | |
| 67 path /= std::string(&uuid[0], &uuid[2]); | |
| 68 path /= std::string(&uuid[2], &uuid[4]); | |
| 69 path /= uuid; | |
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70 |
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71 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
| 0 | 72 path.make_preferred(); |
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73 #endif |
| 0 | 74 |
| 75 return path; | |
| 76 } | |
| 77 | |
| 78 FileStorage::FileStorage(std::string root) | |
| 79 { | |
| 80 namespace fs = boost::filesystem; | |
| 81 | |
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82 //root_ = boost::filesystem::absolute(root).string(); |
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83 root_ = root; |
| 0 | 84 |
| 85 if (fs::exists(root)) | |
| 86 { | |
| 87 if (!fs::is_directory(root)) | |
| 88 { | |
| 59 | 89 throw OrthancException("The file storage root directory is a file"); |
| 0 | 90 } |
| 91 } | |
| 92 else | |
| 93 { | |
| 94 if (!fs::create_directories(root)) | |
| 95 { | |
| 59 | 96 throw OrthancException("Unable to create the file storage root directory"); |
| 0 | 97 } |
| 98 } | |
| 99 } | |
| 100 | |
| 101 std::string FileStorage::CreateFileWithoutCompression(const void* content, size_t size) | |
| 102 { | |
| 103 std::string uuid; | |
| 104 boost::filesystem::path path; | |
| 105 | |
| 106 for (;;) | |
| 107 { | |
| 108 uuid = Toolbox::GenerateUuid(); | |
| 109 path = GetPath(uuid); | |
| 110 | |
| 111 if (!boost::filesystem::exists(path)) | |
| 112 { | |
| 113 // OK, this is indeed a new file | |
| 114 break; | |
| 115 } | |
| 116 | |
| 117 // Extremely improbable case: This Uuid has already been created | |
| 118 // in the past. Try again. | |
| 119 } | |
| 120 | |
| 121 if (boost::filesystem::exists(path.parent_path())) | |
| 122 { | |
| 123 if (!boost::filesystem::is_directory(path.parent_path())) | |
| 124 { | |
| 59 | 125 throw OrthancException("The subdirectory to be created is already occupied by a regular file"); |
| 0 | 126 } |
| 127 } | |
| 128 else | |
| 129 { | |
| 130 if (!boost::filesystem::create_directories(path.parent_path())) | |
| 131 { | |
| 59 | 132 throw OrthancException("Unable to create a subdirectory in the file storage"); |
| 0 | 133 } |
| 134 } | |
| 135 | |
| 136 boost::filesystem::ofstream f; | |
| 137 f.open(path, std::ofstream::out | std::ios::binary); | |
| 138 if (!f.good()) | |
| 139 { | |
| 59 | 140 throw OrthancException("Unable to create a new file in the file storage"); |
| 0 | 141 } |
| 142 | |
| 143 if (size != 0) | |
| 144 { | |
| 145 f.write(static_cast<const char*>(content), size); | |
| 146 if (!f.good()) | |
| 147 { | |
| 148 f.close(); | |
| 59 | 149 throw OrthancException("Unable to write to the new file in the file storage"); |
| 0 | 150 } |
| 151 } | |
| 152 | |
| 153 f.close(); | |
| 154 | |
| 155 return uuid; | |
| 156 } | |
| 157 | |
| 158 | |
| 159 std::string FileStorage::Create(const void* content, size_t size) | |
| 160 { | |
| 161 if (!HasBufferCompressor() || size == 0) | |
| 162 { | |
| 163 return CreateFileWithoutCompression(content, size); | |
| 164 } | |
| 165 else | |
| 166 { | |
| 167 std::string compressed; | |
| 168 compressor_->Compress(compressed, content, size); | |
| 169 assert(compressed.size() > 0); | |
| 170 return CreateFileWithoutCompression(&compressed[0], compressed.size()); | |
| 171 } | |
| 172 } | |
| 173 | |
| 174 | |
| 175 std::string FileStorage::Create(const std::vector<uint8_t>& content) | |
| 176 { | |
| 177 if (content.size() == 0) | |
| 178 return Create(NULL, 0); | |
| 179 else | |
| 180 return Create(&content[0], content.size()); | |
| 181 } | |
| 182 | |
| 183 std::string FileStorage::Create(const std::string& content) | |
| 184 { | |
| 185 if (content.size() == 0) | |
| 186 return Create(NULL, 0); | |
| 187 else | |
| 188 return Create(&content[0], content.size()); | |
| 189 } | |
| 190 | |
| 191 void FileStorage::ReadFile(std::string& content, | |
| 192 const std::string& uuid) const | |
| 193 { | |
| 194 content.clear(); | |
| 195 | |
| 196 if (HasBufferCompressor()) | |
| 197 { | |
| 198 std::string compressed; | |
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199 Toolbox::ReadFile(compressed, ToString(GetPath(uuid))); |
| 0 | 200 |
| 201 if (compressed.size() != 0) | |
| 202 { | |
| 203 compressor_->Uncompress(content, compressed); | |
| 204 } | |
| 205 } | |
| 206 else | |
| 207 { | |
| 208 Toolbox::ReadFile(content, GetPath(uuid).string()); | |
| 209 } | |
| 210 } | |
| 211 | |
| 212 | |
| 213 uintmax_t FileStorage::GetCompressedSize(const std::string& uuid) const | |
| 214 { | |
| 215 boost::filesystem::path path = GetPath(uuid); | |
| 216 return boost::filesystem::file_size(path); | |
| 217 } | |
| 218 | |
| 219 | |
| 220 | |
| 221 void FileStorage::ListAllFiles(std::set<std::string>& result) const | |
| 222 { | |
| 223 namespace fs = boost::filesystem; | |
| 224 | |
| 225 result.clear(); | |
| 226 | |
| 227 if (fs::exists(root_) && fs::is_directory(root_)) | |
| 228 { | |
| 229 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current) | |
| 230 { | |
| 231 if (fs::is_regular_file(current->status())) | |
| 232 { | |
| 233 try | |
| 234 { | |
| 235 fs::path d = current->path(); | |
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236 std::string uuid = ToString(d); |
| 0 | 237 if (Toolbox::IsUuid(uuid)) |
| 238 { | |
| 239 fs::path p0 = d.parent_path().parent_path().parent_path(); | |
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240 std::string p1 = ToString(d.parent_path().parent_path()); |
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241 std::string p2 = ToString(d.parent_path()); |
| 0 | 242 if (p1.length() == 2 && |
| 243 p2.length() == 2 && | |
| 244 p1 == uuid.substr(0, 2) && | |
| 245 p2 == uuid.substr(2, 2) && | |
| 246 p0 == root_) | |
| 247 { | |
| 248 result.insert(uuid); | |
| 249 } | |
| 250 } | |
| 251 } | |
| 252 catch (fs::filesystem_error) | |
| 253 { | |
| 254 } | |
| 255 } | |
| 256 } | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 | |
| 261 void FileStorage::Clear() | |
| 262 { | |
| 263 namespace fs = boost::filesystem; | |
| 264 typedef std::set<std::string> List; | |
| 265 | |
| 266 List result; | |
| 267 ListAllFiles(result); | |
| 268 | |
| 269 for (List::const_iterator it = result.begin(); it != result.end(); it++) | |
| 270 { | |
| 271 Remove(*it); | |
| 272 } | |
| 273 } | |
| 274 | |
| 275 | |
| 276 void FileStorage::Remove(const std::string& uuid) | |
| 277 { | |
| 278 namespace fs = boost::filesystem; | |
| 279 | |
| 280 fs::path p = GetPath(uuid); | |
| 147 | 281 |
| 282 try | |
| 283 { | |
| 284 fs::remove(p); | |
| 285 } | |
| 148 | 286 catch (...) |
| 147 | 287 { |
| 288 // Ignore the error | |
| 289 } | |
| 0 | 290 |
| 291 // Remove the two parent directories, ignoring the error code if | |
| 292 // these directories are not empty | |
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293 |
| 142 | 294 try |
| 295 { | |
| 147 | 296 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
| 297 boost::system::error_code err; | |
| 298 fs::remove(p.parent_path(), err); | |
| 299 fs::remove(p.parent_path().parent_path(), err); | |
| 300 #else | |
| 301 fs::remove(p.parent_path()); | |
| 302 fs::remove(p.parent_path().parent_path()); | |
| 303 #endif | |
| 142 | 304 } |
| 148 | 305 catch (...) |
| 142 | 306 { |
| 307 // Ignore the error | |
| 308 } | |
| 309 } | |
| 310 | |
| 311 | |
| 0 | 312 uintmax_t FileStorage::GetCapacity() const |
| 313 { | |
| 314 return boost::filesystem::space(root_).capacity; | |
| 315 } | |
| 316 | |
| 317 uintmax_t FileStorage::GetAvailableSpace() const | |
| 318 { | |
| 319 return boost::filesystem::space(root_).available; | |
| 320 } | |
| 321 } |