Mercurial > hg > orthanc
annotate Core/Toolbox.cpp @ 524:d80376e73f52
fix of issue #8
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 10 Sep 2013 17:48:00 +0200 |
| parents | 8c3573d28868 |
| children | b22312081388 69c024f9c06b 3f27814104f7 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 398 | 3 * Copyright (C) 2012-2013 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 | |
| 33 #include "Toolbox.h" | |
| 34 | |
| 59 | 35 #include "OrthancException.h" |
| 0 | 36 |
| 453 | 37 #include <stdint.h> |
| 0 | 38 #include <string.h> |
| 39 #include <boost/filesystem.hpp> | |
| 40 #include <boost/filesystem/fstream.hpp> | |
|
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41 #include <boost/date_time/posix_time/posix_time.hpp> |
| 0 | 42 #include <algorithm> |
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43 #include <ctype.h> |
| 0 | 44 |
| 45 #if defined(_WIN32) | |
| 46 #include <windows.h> | |
| 47 #endif | |
| 48 | |
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49 #if defined(__APPLE__) && defined(__MACH__) |
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50 #include <mach-o/dyld.h> /* _NSGetExecutablePath */ |
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51 #include <limits.h> /* PATH_MAX */ |
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52 #endif |
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53 |
| 0 | 54 #if defined(__linux) |
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55 #include <limits.h> /* PATH_MAX */ |
| 10 | 56 #include <signal.h> |
| 0 | 57 #include <unistd.h> |
| 58 #endif | |
| 59 | |
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60 #if BOOST_HAS_LOCALE == 1 |
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61 #include <boost/locale.hpp> |
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62 #else |
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63 #include <iconv.h> |
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64 #endif |
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65 |
| 22 | 66 #include "../Resources/md5/md5.h" |
| 24 | 67 #include "../Resources/base64/base64.h" |
| 177 | 68 #include "../Resources/sha1/sha1.h" |
| 0 | 69 |
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70 |
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71 #if BOOST_HAS_LOCALE == 0 |
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72 namespace |
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73 { |
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74 class IconvRabi |
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75 { |
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76 private: |
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77 iconv_t context_; |
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78 |
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79 public: |
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80 IconvRabi(const char* tocode, const char* fromcode) |
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81 { |
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82 context_ = iconv_open(tocode, fromcode); |
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83 if (!context_) |
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84 { |
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85 throw Orthanc::OrthancException("Unknown code page"); |
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86 } |
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87 } |
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88 |
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89 ~IconvRabi() |
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90 { |
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91 iconv_close(context_); |
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92 } |
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93 |
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94 std::string Convert(const std::string& source) |
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95 { |
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96 if (source.size() == 0) |
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97 { |
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98 return ""; |
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99 } |
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100 |
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101 std::string result; |
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102 char* sourcePos = const_cast<char*>(&source[0]); |
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103 size_t sourceLeft = source.size(); |
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104 |
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105 std::vector<char> storage(source.size() + 10); |
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106 |
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107 while (sourceLeft > 0) |
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108 { |
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109 char* tmp = &storage[0]; |
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110 size_t outputLeft = storage.size(); |
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111 size_t err = iconv(context_, &sourcePos, &sourceLeft, &tmp, &outputLeft); |
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112 if (err < 0) |
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113 { |
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114 throw Orthanc::OrthancException("Bad character in sequence"); |
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115 } |
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116 |
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117 size_t count = storage.size() - outputLeft; |
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118 result += std::string(&storage[0], count); |
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119 } |
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120 |
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121 return result; |
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122 } |
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123 }; |
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124 } |
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125 #endif |
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126 |
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127 |
| 59 | 128 namespace Orthanc |
| 0 | 129 { |
| 130 static bool finish; | |
| 131 | |
| 10 | 132 #if defined(_WIN32) |
| 22 | 133 static BOOL WINAPI ConsoleControlHandler(DWORD dwCtrlType) |
| 134 { | |
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135 // http://msdn.microsoft.com/en-us/library/ms683242(v=vs.85).aspx |
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136 finish = true; |
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137 return true; |
| 22 | 138 } |
| 139 #else | |
| 0 | 140 static void SignalHandler(int) |
| 141 { | |
| 142 finish = true; | |
| 143 } | |
| 22 | 144 #endif |
| 0 | 145 |
| 146 void Toolbox::Sleep(uint32_t seconds) | |
| 147 { | |
| 148 #if defined(_WIN32) | |
| 149 ::Sleep(static_cast<DWORD>(seconds) * static_cast<DWORD>(1000)); | |
| 150 #elif defined(__linux) | |
| 151 usleep(static_cast<uint64_t>(seconds) * static_cast<uint64_t>(1000000)); | |
| 152 #else | |
| 153 #error Support your platform here | |
| 154 #endif | |
| 155 } | |
| 156 | |
| 157 void Toolbox::USleep(uint64_t microSeconds) | |
| 158 { | |
| 159 #if defined(_WIN32) | |
| 8 | 160 ::Sleep(static_cast<DWORD>(microSeconds / static_cast<uint64_t>(1000))); |
| 0 | 161 #elif defined(__linux) |
| 162 usleep(microSeconds); | |
| 163 #else | |
| 164 #error Support your platform here | |
| 165 #endif | |
| 166 } | |
| 167 | |
| 168 | |
| 169 void Toolbox::ServerBarrier() | |
| 170 { | |
| 10 | 171 #if defined(_WIN32) |
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172 SetConsoleCtrlHandler(ConsoleControlHandler, true); |
| 10 | 173 #else |
| 0 | 174 signal(SIGINT, SignalHandler); |
| 175 signal(SIGQUIT, SignalHandler); | |
| 176 #endif | |
| 177 | |
| 178 finish = false; | |
| 179 while (!finish) | |
| 180 { | |
| 181 USleep(100000); | |
| 182 } | |
| 183 | |
| 10 | 184 #if defined(_WIN32) |
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185 SetConsoleCtrlHandler(ConsoleControlHandler, false); |
| 10 | 186 #else |
| 0 | 187 signal(SIGINT, NULL); |
| 188 signal(SIGQUIT, NULL); | |
| 189 #endif | |
| 190 } | |
| 191 | |
| 192 | |
| 193 | |
| 194 void Toolbox::ToUpperCase(std::string& s) | |
| 195 { | |
| 196 std::transform(s.begin(), s.end(), s.begin(), toupper); | |
| 197 } | |
| 198 | |
| 199 | |
| 200 void Toolbox::ToLowerCase(std::string& s) | |
| 201 { | |
| 202 std::transform(s.begin(), s.end(), s.begin(), tolower); | |
| 203 } | |
| 204 | |
| 205 | |
| 206 | |
| 207 void Toolbox::ReadFile(std::string& content, | |
| 208 const std::string& path) | |
| 209 { | |
| 210 boost::filesystem::ifstream f; | |
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211 f.open(path, std::ifstream::in | std::ifstream::binary); |
| 0 | 212 if (!f.good()) |
| 213 { | |
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214 throw OrthancException(ErrorCode_InexistentFile); |
| 0 | 215 } |
| 216 | |
| 217 // http://www.cplusplus.com/reference/iostream/istream/tellg/ | |
| 218 f.seekg(0, std::ios::end); | |
| 219 std::streamsize size = f.tellg(); | |
| 220 f.seekg(0, std::ios::beg); | |
| 221 | |
| 222 content.resize(size); | |
| 223 if (size != 0) | |
| 224 { | |
| 225 f.read(reinterpret_cast<char*>(&content[0]), size); | |
| 226 } | |
| 227 | |
| 228 f.close(); | |
| 229 } | |
| 230 | |
| 231 | |
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232 void Toolbox::WriteFile(const std::string& content, |
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233 const std::string& path) |
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234 { |
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235 boost::filesystem::ofstream f; |
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236 f.open(path, std::ofstream::binary); |
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237 if (!f.good()) |
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238 { |
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239 throw OrthancException(ErrorCode_CannotWriteFile); |
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240 } |
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241 |
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242 if (content.size() != 0) |
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243 { |
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244 f.write(content.c_str(), content.size()); |
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245 } |
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246 |
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247 f.close(); |
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248 } |
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249 |
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250 |
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251 |
| 0 | 252 void Toolbox::RemoveFile(const std::string& path) |
| 253 { | |
| 254 if (boost::filesystem::exists(path)) | |
| 255 { | |
| 256 if (boost::filesystem::is_regular_file(path)) | |
| 257 boost::filesystem::remove(path); | |
| 258 else | |
| 59 | 259 throw OrthancException("The path is not a regular file: " + path); |
| 0 | 260 } |
| 261 } | |
| 262 | |
| 263 | |
| 264 | |
| 265 void Toolbox::SplitUriComponents(UriComponents& components, | |
| 266 const std::string& uri) | |
| 267 { | |
| 268 static const char URI_SEPARATOR = '/'; | |
| 269 | |
| 270 components.clear(); | |
| 271 | |
| 272 if (uri.size() == 0 || | |
| 273 uri[0] != URI_SEPARATOR) | |
| 274 { | |
| 59 | 275 throw OrthancException(ErrorCode_UriSyntax); |
| 0 | 276 } |
| 277 | |
| 278 // Count the number of slashes in the URI to make an assumption | |
| 279 // about the number of components in the URI | |
| 280 unsigned int estimatedSize = 0; | |
| 281 for (unsigned int i = 0; i < uri.size(); i++) | |
| 282 { | |
| 283 if (uri[i] == URI_SEPARATOR) | |
| 284 estimatedSize++; | |
| 285 } | |
| 286 | |
| 287 components.reserve(estimatedSize - 1); | |
| 288 | |
| 289 unsigned int start = 1; | |
| 290 unsigned int end = 1; | |
| 291 while (end < uri.size()) | |
| 292 { | |
| 293 // This is the loop invariant | |
| 294 assert(uri[start - 1] == '/' && (end >= start)); | |
| 295 | |
| 296 if (uri[end] == '/') | |
| 297 { | |
| 298 components.push_back(std::string(&uri[start], end - start)); | |
| 299 end++; | |
| 300 start = end; | |
| 301 } | |
| 302 else | |
| 303 { | |
| 304 end++; | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 if (start < uri.size()) | |
| 309 { | |
| 310 components.push_back(std::string(&uri[start], end - start)); | |
| 311 } | |
| 207 | 312 |
| 313 for (size_t i = 0; i < components.size(); i++) | |
| 314 { | |
| 315 if (components[i].size() == 0) | |
| 316 { | |
| 317 // Empty component, as in: "/coucou//e" | |
| 318 throw OrthancException(ErrorCode_UriSyntax); | |
| 319 } | |
| 320 } | |
| 0 | 321 } |
| 322 | |
| 323 | |
| 324 bool Toolbox::IsChildUri(const UriComponents& baseUri, | |
| 325 const UriComponents& testedUri) | |
| 326 { | |
| 327 if (testedUri.size() < baseUri.size()) | |
| 328 { | |
| 329 return false; | |
| 330 } | |
| 331 | |
| 332 for (size_t i = 0; i < baseUri.size(); i++) | |
| 333 { | |
| 334 if (baseUri[i] != testedUri[i]) | |
| 335 return false; | |
| 336 } | |
| 337 | |
| 338 return true; | |
| 339 } | |
| 340 | |
| 341 | |
| 342 std::string Toolbox::AutodetectMimeType(const std::string& path) | |
| 343 { | |
| 344 std::string contentType; | |
| 345 size_t lastDot = path.rfind('.'); | |
| 346 size_t lastSlash = path.rfind('/'); | |
| 347 | |
| 348 if (lastDot == std::string::npos || | |
| 349 (lastSlash != std::string::npos && lastDot < lastSlash)) | |
| 350 { | |
| 351 // No trailing dot, unable to detect the content type | |
| 352 } | |
| 353 else | |
| 354 { | |
| 355 const char* extension = &path[lastDot + 1]; | |
| 356 | |
| 357 // http://en.wikipedia.org/wiki/Mime_types | |
| 358 // Text types | |
| 359 if (!strcmp(extension, "txt")) | |
| 360 contentType = "text/plain"; | |
| 361 else if (!strcmp(extension, "html")) | |
| 362 contentType = "text/html"; | |
| 363 else if (!strcmp(extension, "xml")) | |
| 364 contentType = "text/xml"; | |
| 365 else if (!strcmp(extension, "css")) | |
| 366 contentType = "text/css"; | |
| 367 | |
| 368 // Application types | |
| 369 else if (!strcmp(extension, "js")) | |
| 370 contentType = "application/javascript"; | |
| 371 else if (!strcmp(extension, "json")) | |
| 372 contentType = "application/json"; | |
| 373 else if (!strcmp(extension, "pdf")) | |
| 374 contentType = "application/pdf"; | |
| 375 | |
| 376 // Images types | |
| 377 else if (!strcmp(extension, "jpg") || !strcmp(extension, "jpeg")) | |
| 378 contentType = "image/jpeg"; | |
| 379 else if (!strcmp(extension, "gif")) | |
| 380 contentType = "image/gif"; | |
| 381 else if (!strcmp(extension, "png")) | |
| 382 contentType = "image/png"; | |
| 383 } | |
| 384 | |
| 385 return contentType; | |
| 386 } | |
| 387 | |
| 388 | |
| 389 std::string Toolbox::FlattenUri(const UriComponents& components, | |
| 390 size_t fromLevel) | |
| 391 { | |
| 392 if (components.size() <= fromLevel) | |
| 393 { | |
| 394 return "/"; | |
| 395 } | |
| 396 else | |
| 397 { | |
| 398 std::string r; | |
| 399 | |
| 400 for (size_t i = fromLevel; i < components.size(); i++) | |
| 401 { | |
| 402 r += "/" + components[i]; | |
| 403 } | |
| 404 | |
| 405 return r; | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 | |
| 410 | |
| 411 uint64_t Toolbox::GetFileSize(const std::string& path) | |
| 412 { | |
| 413 try | |
| 414 { | |
| 415 return static_cast<uint64_t>(boost::filesystem::file_size(path)); | |
| 416 } | |
| 417 catch (boost::filesystem::filesystem_error) | |
| 418 { | |
| 59 | 419 throw OrthancException(ErrorCode_InexistentFile); |
| 0 | 420 } |
| 421 } | |
| 22 | 422 |
| 423 | |
| 424 static char GetHexadecimalCharacter(uint8_t value) | |
| 425 { | |
| 426 assert(value < 16); | |
| 427 | |
| 428 if (value < 10) | |
| 429 return value + '0'; | |
| 430 else | |
| 431 return (value - 10) + 'a'; | |
| 432 } | |
| 433 | |
| 23 | 434 |
| 22 | 435 void Toolbox::ComputeMD5(std::string& result, |
| 436 const std::string& data) | |
| 437 { | |
| 438 md5_state_s state; | |
| 439 md5_init(&state); | |
| 440 | |
| 441 if (data.size() > 0) | |
| 442 { | |
| 443 md5_append(&state, reinterpret_cast<const md5_byte_t*>(&data[0]), | |
| 444 static_cast<int>(data.size())); | |
| 445 } | |
| 446 | |
| 447 md5_byte_t actualHash[16]; | |
| 448 md5_finish(&state, actualHash); | |
| 449 | |
| 450 result.resize(32); | |
| 451 for (unsigned int i = 0; i < 16; i++) | |
| 452 { | |
| 453 result[2 * i] = GetHexadecimalCharacter(actualHash[i] / 16); | |
| 454 result[2 * i + 1] = GetHexadecimalCharacter(actualHash[i] % 16); | |
| 455 } | |
| 456 } | |
| 24 | 457 |
| 458 | |
| 459 std::string Toolbox::EncodeBase64(const std::string& data) | |
| 460 { | |
| 86 | 461 return base64_encode(data); |
| 24 | 462 } |
| 463 | |
| 365 | 464 std::string Toolbox::DecodeBase64(const std::string& data) |
| 465 { | |
| 466 return base64_decode(data); | |
| 467 } | |
| 468 | |
|
87
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469 |
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470 #if defined(_WIN32) |
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471 std::string Toolbox::GetPathToExecutable() |
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472 { |
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473 // Yes, this is ugly, but there is no simple way to get the |
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474 // required buffer size, so we use a big constant |
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475 std::vector<char> buffer(32768); |
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476 /*int bytes =*/ GetModuleFileNameA(NULL, &buffer[0], static_cast<DWORD>(buffer.size() - 1)); |
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477 return std::string(&buffer[0]); |
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478 } |
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479 |
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480 #elif defined(__linux) |
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481 std::string Toolbox::GetPathToExecutable() |
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482 { |
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483 std::vector<char> buffer(PATH_MAX + 1); |
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484 ssize_t bytes = readlink("/proc/self/exe", &buffer[0], buffer.size() - 1); |
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485 if (bytes == 0) |
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486 { |
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487 throw OrthancException("Unable to get the path to the executable"); |
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488 } |
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489 |
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490 return std::string(&buffer[0]); |
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491 } |
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492 |
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493 #elif defined(__APPLE__) && defined(__MACH__) |
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494 std::string Toolbox::GetPathToExecutable() |
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495 { |
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496 char pathbuf[PATH_MAX + 1]; |
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497 unsigned int bufsize = static_cast<int>(sizeof(pathbuf)); |
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498 |
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499 _NSGetExecutablePath( pathbuf, &bufsize); |
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500 |
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501 return std::string(pathbuf); |
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502 } |
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503 |
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504 #else |
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505 #error Support your platform here |
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506 #endif |
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507 |
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508 |
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509 std::string Toolbox::GetDirectoryOfExecutable() |
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510 { |
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511 boost::filesystem::path p(GetPathToExecutable()); |
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512 return p.parent_path().string(); |
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513 } |
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514 |
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515 |
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516 std::string Toolbox::ConvertToUtf8(const std::string& source, |
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517 const char* fromEncoding) |
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518 { |
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519 #if BOOST_HAS_LOCALE == 1 |
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520 try |
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521 { |
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522 return boost::locale::conv::to_utf<char>(source, fromEncoding); |
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523 } |
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524 catch (std::runtime_error&) |
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525 { |
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526 // Bad input string or bad encoding |
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527 return ConvertToAscii(source); |
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528 } |
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529 #else |
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530 IconvRabi iconv("UTF-8", fromEncoding); |
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531 try |
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532 { |
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533 return iconv.Convert(source); |
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534 } |
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535 catch (OrthancException) |
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536 { |
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537 return ConvertToAscii(source); |
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538 } |
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539 #endif |
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540 } |
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541 |
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542 |
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543 std::string Toolbox::ConvertToAscii(const std::string& source) |
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544 { |
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545 std::string result; |
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546 |
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547 result.reserve(source.size()); |
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548 for (size_t i = 0; i < source.size(); i++) |
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549 { |
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550 if (source[i] < 128 && source[i] >= 0 && !iscntrl(source[i])) |
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551 { |
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552 result.push_back(source[i]); |
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553 } |
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554 } |
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555 |
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556 return result; |
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557 } |
| 177 | 558 |
| 559 void Toolbox::ComputeSHA1(std::string& result, | |
| 560 const std::string& data) | |
| 561 { | |
| 562 SHA1 sha1; | |
| 563 if (data.size() > 0) | |
| 564 { | |
| 565 sha1.Input(&data[0], data.size()); | |
| 566 } | |
| 567 | |
| 568 unsigned digest[5]; | |
| 569 | |
| 570 // Sanity check for the memory layout: A SHA-1 digest is 160 bits wide | |
| 571 assert(sizeof(unsigned) == 4 && sizeof(digest) == (160 / 8)); | |
| 572 | |
| 573 if (sha1.Result(digest)) | |
| 574 { | |
| 575 result.resize(8 * 5 + 4); | |
| 576 sprintf(&result[0], "%08x-%08x-%08x-%08x-%08x", | |
| 577 digest[0], | |
| 578 digest[1], | |
| 579 digest[2], | |
| 580 digest[3], | |
| 581 digest[4]); | |
| 582 } | |
| 583 else | |
| 584 { | |
| 585 throw OrthancException(ErrorCode_InternalError); | |
| 586 } | |
| 587 } | |
| 588 | |
| 402 | 589 bool Toolbox::IsSHA1(const std::string& str) |
| 590 { | |
| 591 if (str.size() != 44) | |
| 592 { | |
| 593 return false; | |
| 594 } | |
| 595 | |
| 596 for (unsigned int i = 0; i < 44; i++) | |
| 597 { | |
| 598 if (i == 8 || | |
| 599 i == 17 || | |
| 600 i == 26 || | |
| 601 i == 35) | |
| 602 { | |
| 603 if (str[i] != '-') | |
| 604 return false; | |
| 605 } | |
| 606 else | |
| 607 { | |
| 608 if (!isalnum(str[i])) | |
| 609 return false; | |
| 610 } | |
| 611 } | |
| 612 | |
| 613 return true; | |
| 614 } | |
| 615 | |
|
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616 std::string Toolbox::GetNowIsoString() |
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617 { |
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618 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time(); |
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619 return boost::posix_time::to_iso_string(now); |
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620 } |
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621 |
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622 std::string Toolbox::StripSpaces(const std::string& source) |
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623 { |
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624 size_t first = 0; |
| 177 | 625 |
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626 while (first < source.length() && |
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627 isspace(source[first])) |
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628 { |
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629 first++; |
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630 } |
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631 |
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632 if (first == source.length()) |
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633 { |
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634 // String containing only spaces |
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635 return ""; |
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636 } |
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637 |
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638 size_t last = source.length(); |
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639 while (last > first && |
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640 isspace(source[last - 1])) |
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641 { |
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642 last--; |
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643 } |
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644 |
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645 assert(first <= last); |
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646 return source.substr(first, last - first); |
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647 } |
| 336 | 648 |
| 649 | |
| 337 | 650 static char Hex2Dec(char c) |
| 336 | 651 { |
| 652 return ((c >= '0' && c <= '9') ? c - '0' : | |
| 653 ((c >= 'a' && c <= 'f') ? c - 'a' + 10 : c - 'A' + 10)); | |
| 654 } | |
| 655 | |
| 656 void Toolbox::UrlDecode(std::string& s) | |
| 657 { | |
| 658 // http://en.wikipedia.org/wiki/Percent-encoding | |
| 659 // http://www.w3schools.com/tags/ref_urlencode.asp | |
| 660 // http://stackoverflow.com/questions/154536/encode-decode-urls-in-c | |
| 661 | |
| 662 if (s.size() == 0) | |
| 663 { | |
| 664 return; | |
| 665 } | |
| 666 | |
| 667 size_t source = 0; | |
| 668 size_t target = 0; | |
| 669 | |
| 670 while (source < s.size()) | |
| 671 { | |
| 672 if (s[source] == '%' && | |
| 673 source + 2 < s.size() && | |
| 674 isalnum(s[source + 1]) && | |
| 675 isalnum(s[source + 2])) | |
| 676 { | |
| 677 s[target] = (Hex2Dec(s[source + 1]) << 4) | Hex2Dec(s[source + 2]); | |
| 678 source += 3; | |
| 679 target += 1; | |
| 680 } | |
| 681 else | |
| 682 { | |
| 683 if (s[source] == '+') | |
| 684 s[target] = ' '; | |
| 685 else | |
| 686 s[target] = s[source]; | |
| 687 | |
| 688 source++; | |
| 689 target++; | |
| 690 } | |
| 691 } | |
| 692 | |
| 693 s.resize(target); | |
| 694 } | |
| 453 | 695 |
| 696 | |
| 697 Endianness Toolbox::DetectEndianness() | |
| 698 { | |
| 699 // http://sourceforge.net/p/predef/wiki/Endianness/ | |
| 700 | |
| 701 uint8_t buffer[4]; | |
| 702 | |
| 703 buffer[0] = 0x00; | |
| 704 buffer[1] = 0x01; | |
| 705 buffer[2] = 0x02; | |
| 706 buffer[3] = 0x03; | |
| 707 | |
| 708 switch (*((uint32_t *)buffer)) | |
| 709 { | |
| 710 case 0x00010203: | |
| 711 return Endianness_Big; | |
| 712 | |
| 713 case 0x03020100: | |
| 714 return Endianness_Little; | |
| 715 | |
| 716 default: | |
| 717 throw OrthancException(ErrorCode_NotImplemented); | |
| 718 } | |
| 719 } | |
| 0 | 720 } |