Mercurial > hg > orthanc
annotate Core/FileStorage/FileStorage.cpp @ 1057:3a26bc6e4867
more generic paths in CMake
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 25 Jul 2014 10:12:16 +0200 |
parents | a811bdf8b8eb |
children | 1d60316c3618 |
rev | line source |
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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" |
0 | 34 #include "FileStorage.h" |
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 { |
58 boost::filesystem::path FileStorage::GetPath(const std::string& uuid) const | |
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 | |
80 FileStorage::FileStorage(std::string root) | |
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 | |
88 std::string FileStorage::CreateFileWithoutCompression(const void* content, size_t size) | |
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 | |
146 std::string FileStorage::Create(const void* content, size_t size) | |
147 { | |
148 if (!HasBufferCompressor() || size == 0) | |
149 { | |
150 return CreateFileWithoutCompression(content, size); | |
151 } | |
152 else | |
153 { | |
154 std::string compressed; | |
155 compressor_->Compress(compressed, content, size); | |
156 assert(compressed.size() > 0); | |
157 return CreateFileWithoutCompression(&compressed[0], compressed.size()); | |
158 } | |
159 } | |
160 | |
161 | |
162 std::string FileStorage::Create(const std::vector<uint8_t>& content) | |
163 { | |
164 if (content.size() == 0) | |
165 return Create(NULL, 0); | |
166 else | |
167 return Create(&content[0], content.size()); | |
168 } | |
169 | |
170 std::string FileStorage::Create(const std::string& content) | |
171 { | |
172 if (content.size() == 0) | |
173 return Create(NULL, 0); | |
174 else | |
175 return Create(&content[0], content.size()); | |
176 } | |
177 | |
178 void FileStorage::ReadFile(std::string& content, | |
179 const std::string& uuid) const | |
180 { | |
181 content.clear(); | |
182 | |
183 if (HasBufferCompressor()) | |
184 { | |
185 std::string compressed; | |
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186 Toolbox::ReadFile(compressed, ToString(GetPath(uuid))); |
0 | 187 |
188 if (compressed.size() != 0) | |
189 { | |
190 compressor_->Uncompress(content, compressed); | |
191 } | |
192 } | |
193 else | |
194 { | |
195 Toolbox::ReadFile(content, GetPath(uuid).string()); | |
196 } | |
197 } | |
198 | |
199 | |
200 uintmax_t FileStorage::GetCompressedSize(const std::string& uuid) const | |
201 { | |
202 boost::filesystem::path path = GetPath(uuid); | |
203 return boost::filesystem::file_size(path); | |
204 } | |
205 | |
206 | |
207 | |
208 void FileStorage::ListAllFiles(std::set<std::string>& result) const | |
209 { | |
210 namespace fs = boost::filesystem; | |
211 | |
212 result.clear(); | |
213 | |
214 if (fs::exists(root_) && fs::is_directory(root_)) | |
215 { | |
216 for (fs::recursive_directory_iterator current(root_), end; current != end ; ++current) | |
217 { | |
218 if (fs::is_regular_file(current->status())) | |
219 { | |
220 try | |
221 { | |
222 fs::path d = current->path(); | |
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223 std::string uuid = ToString(d); |
0 | 224 if (Toolbox::IsUuid(uuid)) |
225 { | |
226 fs::path p0 = d.parent_path().parent_path().parent_path(); | |
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227 std::string p1 = ToString(d.parent_path().parent_path()); |
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228 std::string p2 = ToString(d.parent_path()); |
0 | 229 if (p1.length() == 2 && |
230 p2.length() == 2 && | |
231 p1 == uuid.substr(0, 2) && | |
232 p2 == uuid.substr(2, 2) && | |
233 p0 == root_) | |
234 { | |
235 result.insert(uuid); | |
236 } | |
237 } | |
238 } | |
239 catch (fs::filesystem_error) | |
240 { | |
241 } | |
242 } | |
243 } | |
244 } | |
245 } | |
246 | |
247 | |
248 void FileStorage::Clear() | |
249 { | |
250 namespace fs = boost::filesystem; | |
251 typedef std::set<std::string> List; | |
252 | |
253 List result; | |
254 ListAllFiles(result); | |
255 | |
656 | 256 for (List::const_iterator it = result.begin(); it != result.end(); ++it) |
0 | 257 { |
258 Remove(*it); | |
259 } | |
260 } | |
261 | |
262 | |
263 void FileStorage::Remove(const std::string& uuid) | |
264 { | |
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265 LOG(INFO) << "Deleting file " << uuid; |
0 | 266 namespace fs = boost::filesystem; |
267 | |
268 fs::path p = GetPath(uuid); | |
147 | 269 |
270 try | |
271 { | |
272 fs::remove(p); | |
273 } | |
148 | 274 catch (...) |
147 | 275 { |
276 // Ignore the error | |
277 } | |
0 | 278 |
279 // Remove the two parent directories, ignoring the error code if | |
280 // these directories are not empty | |
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281 |
142 | 282 try |
283 { | |
147 | 284 #if BOOST_HAS_FILESYSTEM_V3 == 1 |
285 boost::system::error_code err; | |
286 fs::remove(p.parent_path(), err); | |
287 fs::remove(p.parent_path().parent_path(), err); | |
288 #else | |
289 fs::remove(p.parent_path()); | |
290 fs::remove(p.parent_path().parent_path()); | |
291 #endif | |
142 | 292 } |
148 | 293 catch (...) |
142 | 294 { |
295 // Ignore the error | |
296 } | |
297 } | |
298 | |
299 | |
0 | 300 uintmax_t FileStorage::GetCapacity() const |
301 { | |
302 return boost::filesystem::space(root_).capacity; | |
303 } | |
304 | |
305 uintmax_t FileStorage::GetAvailableSpace() const | |
306 { | |
307 return boost::filesystem::space(root_).available; | |
308 } | |
309 } |