Mercurial > hg > orthanc
annotate Core/FileStorage/FilesystemStorage.cpp @ 1124:790ff7a5b3bf
IStorageArea abstraction
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 05 Sep 2014 16:28:34 +0200 |
| parents | 6c5a77637b23 |
| children | bf67431a7383 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 689 | 3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, |
| 0 | 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 | |
|
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33 #include "../PrecompiledHeaders.h" |
| 1123 | 34 #include "FilesystemStorage.h" |
| 0 | 35 |
| 36 // http://stackoverflow.com/questions/1576272/storing-large-number-of-files-in-file-system | |
| 37 // http://stackoverflow.com/questions/446358/storing-a-large-number-of-images | |
| 38 | |
| 234 | 39 #include "../OrthancException.h" |
| 40 #include "../Toolbox.h" | |
| 41 #include "../Uuid.h" | |
| 0 | 42 |
| 43 #include <boost/filesystem/fstream.hpp> | |
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44 #include <glog/logging.h> |
| 0 | 45 |
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46 static std::string ToString(const boost::filesystem::path& p) |
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47 { |
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48 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
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49 return p.filename().string(); |
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50 #else |
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51 return p.filename(); |
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52 #endif |
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53 } |
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54 |
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55 |
| 59 | 56 namespace Orthanc |
| 0 | 57 { |
| 1123 | 58 boost::filesystem::path FilesystemStorage::GetPath(const std::string& uuid) const |
| 0 | 59 { |
| 60 namespace fs = boost::filesystem; | |
| 61 | |
| 62 if (!Toolbox::IsUuid(uuid)) | |
| 63 { | |
| 59 | 64 throw OrthancException(ErrorCode_ParameterOutOfRange); |
| 0 | 65 } |
| 66 | |
| 67 fs::path path = root_; | |
| 68 | |
| 69 path /= std::string(&uuid[0], &uuid[2]); | |
| 70 path /= std::string(&uuid[2], &uuid[4]); | |
| 71 path /= uuid; | |
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72 |
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73 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
| 0 | 74 path.make_preferred(); |
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75 #endif |
| 0 | 76 |
| 77 return path; | |
| 78 } | |
| 79 | |
| 1123 | 80 FilesystemStorage::FilesystemStorage(std::string root) |
| 0 | 81 { |
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82 //root_ = boost::filesystem::absolute(root).string(); |
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83 root_ = root; |
| 0 | 84 |
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85 Toolbox::CreateDirectory(root); |
| 0 | 86 } |
| 87 | |
| 1123 | 88 std::string FilesystemStorage::Create(const void* content, size_t size) |
| 0 | 89 { |
| 90 std::string uuid; | |
| 91 boost::filesystem::path path; | |
| 92 | |
| 93 for (;;) | |
| 94 { | |
| 95 uuid = Toolbox::GenerateUuid(); | |
| 96 path = GetPath(uuid); | |
| 97 | |
| 98 if (!boost::filesystem::exists(path)) | |
| 99 { | |
| 100 // OK, this is indeed a new file | |
| 101 break; | |
| 102 } | |
| 103 | |
| 104 // Extremely improbable case: This Uuid has already been created | |
| 105 // in the past. Try again. | |
| 106 } | |
| 107 | |
| 108 if (boost::filesystem::exists(path.parent_path())) | |
| 109 { | |
| 110 if (!boost::filesystem::is_directory(path.parent_path())) | |
| 111 { | |
| 59 | 112 throw OrthancException("The subdirectory to be created is already occupied by a regular file"); |
| 0 | 113 } |
| 114 } | |
| 115 else | |
| 116 { | |
| 117 if (!boost::filesystem::create_directories(path.parent_path())) | |
| 118 { | |
| 59 | 119 throw OrthancException("Unable to create a subdirectory in the file storage"); |
| 0 | 120 } |
| 121 } | |
| 122 | |
| 123 boost::filesystem::ofstream f; | |
| 124 f.open(path, std::ofstream::out | std::ios::binary); | |
| 125 if (!f.good()) | |
| 126 { | |
| 59 | 127 throw OrthancException("Unable to create a new file in the file storage"); |
| 0 | 128 } |
| 129 | |
| 130 if (size != 0) | |
| 131 { | |
| 132 f.write(static_cast<const char*>(content), size); | |
| 133 if (!f.good()) | |
| 134 { | |
| 135 f.close(); | |
| 59 | 136 throw OrthancException("Unable to write to the new file in the file storage"); |
| 0 | 137 } |
| 138 } | |
| 139 | |
| 140 f.close(); | |
| 141 | |
| 142 return uuid; | |
| 143 } | |
| 144 | |
| 145 | |
| 1123 | 146 void FilesystemStorage::Read(std::string& content, |
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147 const std::string& uuid) const |
| 0 | 148 { |
| 149 content.clear(); | |
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150 Toolbox::ReadFile(content, GetPath(uuid).string()); |
| 0 | 151 } |
| 152 | |
| 153 | |
| 1123 | 154 uintmax_t FilesystemStorage::GetSize(const std::string& uuid) const |
| 0 | 155 { |
| 156 boost::filesystem::path path = GetPath(uuid); | |
| 157 return boost::filesystem::file_size(path); | |
| 158 } | |
| 159 | |
| 160 | |
| 161 | |
| 1123 | 162 void FilesystemStorage::ListAllFiles(std::set<std::string>& result) const |
| 0 | 163 { |
| 164 namespace fs = boost::filesystem; | |
| 165 | |
| 166 result.clear(); | |
| 167 | |
| 168 if (fs::exists(root_) && fs::is_directory(root_)) | |
| 169 { | |
| 170 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current) | |
| 171 { | |
| 172 if (fs::is_regular_file(current->status())) | |
| 173 { | |
| 174 try | |
| 175 { | |
| 176 fs::path d = current->path(); | |
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177 std::string uuid = ToString(d); |
| 0 | 178 if (Toolbox::IsUuid(uuid)) |
| 179 { | |
| 180 fs::path p0 = d.parent_path().parent_path().parent_path(); | |
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181 std::string p1 = ToString(d.parent_path().parent_path()); |
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182 std::string p2 = ToString(d.parent_path()); |
| 0 | 183 if (p1.length() == 2 && |
| 184 p2.length() == 2 && | |
| 185 p1 == uuid.substr(0, 2) && | |
| 186 p2 == uuid.substr(2, 2) && | |
| 187 p0 == root_) | |
| 188 { | |
| 189 result.insert(uuid); | |
| 190 } | |
| 191 } | |
| 192 } | |
| 193 catch (fs::filesystem_error) | |
| 194 { | |
| 195 } | |
| 196 } | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 | |
| 1123 | 202 void FilesystemStorage::Clear() |
| 0 | 203 { |
| 204 namespace fs = boost::filesystem; | |
| 205 typedef std::set<std::string> List; | |
| 206 | |
| 207 List result; | |
| 208 ListAllFiles(result); | |
| 209 | |
| 656 | 210 for (List::const_iterator it = result.begin(); it != result.end(); ++it) |
| 0 | 211 { |
| 212 Remove(*it); | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 | |
| 1123 | 217 void FilesystemStorage::Remove(const std::string& uuid) |
| 0 | 218 { |
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219 LOG(INFO) << "Deleting file " << uuid; |
| 0 | 220 namespace fs = boost::filesystem; |
| 221 | |
| 222 fs::path p = GetPath(uuid); | |
| 147 | 223 |
| 224 try | |
| 225 { | |
| 226 fs::remove(p); | |
| 227 } | |
| 148 | 228 catch (...) |
| 147 | 229 { |
| 230 // Ignore the error | |
| 231 } | |
| 0 | 232 |
| 233 // Remove the two parent directories, ignoring the error code if | |
| 234 // these directories are not empty | |
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235 |
| 142 | 236 try |
| 237 { | |
| 147 | 238 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
| 239 boost::system::error_code err; | |
| 240 fs::remove(p.parent_path(), err); | |
| 241 fs::remove(p.parent_path().parent_path(), err); | |
| 242 #else | |
| 243 fs::remove(p.parent_path()); | |
| 244 fs::remove(p.parent_path().parent_path()); | |
| 245 #endif | |
| 142 | 246 } |
| 148 | 247 catch (...) |
| 142 | 248 { |
| 249 // Ignore the error | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 | |
| 1123 | 254 uintmax_t FilesystemStorage::GetCapacity() const |
| 0 | 255 { |
| 256 return boost::filesystem::space(root_).capacity; | |
| 257 } | |
| 258 | |
| 1123 | 259 uintmax_t FilesystemStorage::GetAvailableSpace() const |
| 0 | 260 { |
| 261 return boost::filesystem::space(root_).available; | |
| 262 } | |
| 263 } |