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3357
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "PrecompiledHeaders.h"
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35 #include "FileBuffer.h"
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36
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37 #include "TemporaryFile.h"
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38 #include "OrthancException.h"
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39
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40 #include <boost/filesystem/fstream.hpp>
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41
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42
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43 namespace Orthanc
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44 {
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45 class FileBuffer::PImpl
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46 {
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47 private:
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48 TemporaryFile file_;
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49 boost::filesystem::ofstream stream_;
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50 bool isWriting_;
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51
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52 public:
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53 PImpl() :
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54 isWriting_(true)
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55 {
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56 stream_.open(file_.GetPath(), std::ofstream::out | std::ofstream::binary);
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57 if (!stream_.good())
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58 {
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59 throw OrthancException(ErrorCode_CannotWriteFile);
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60 }
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61 }
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62
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63 ~PImpl()
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64 {
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65 if (isWriting_)
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66 {
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67 stream_.close();
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68 }
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69 }
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70
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71 void Append(const char* buffer,
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72 size_t size)
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73 {
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74 if (!isWriting_)
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75 {
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76 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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77 }
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78
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79 if (size > 0)
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80 {
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81 stream_.write(buffer, size);
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82 if (!stream_.good())
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83 {
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84 stream_.close();
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85 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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86 }
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87 }
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88 }
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89
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90 void Read(std::string& target)
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91 {
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92 if (isWriting_)
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93 {
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94 stream_.close();
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95 isWriting_ = false;
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96 }
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97
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98 file_.Read(target);
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99 }
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100 };
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101
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102
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103 FileBuffer::FileBuffer() :
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104 pimpl_(new PImpl)
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105 {
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106 }
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107
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108
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109 void FileBuffer::Append(const char* buffer,
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110 size_t size)
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111 {
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112 assert(pimpl_.get() != NULL);
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113 pimpl_->Append(buffer, size);
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114 }
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115
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116
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117 void FileBuffer::Read(std::string& target)
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118 {
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119 assert(pimpl_.get() != NULL);
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120 pimpl_->Read(target);
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121 }
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122 }
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