annotate OrthancFramework/Sources/FileBuffer.cpp @ 5853:4d932683049d get-scu tip

very first implementation of C-Get SCU
author Alain Mazy <am@orthanc.team>
date Tue, 29 Oct 2024 17:25:49 +0100
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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24
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25 #include "PrecompiledHeaders.h"
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26 #include "FileBuffer.h"
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27
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28 #include "TemporaryFile.h"
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29 #include "OrthancException.h"
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30
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31 #include <boost/filesystem/fstream.hpp>
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32
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33
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34 namespace Orthanc
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35 {
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36 class FileBuffer::PImpl
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37 {
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38 private:
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39 TemporaryFile file_;
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40 boost::filesystem::ofstream stream_;
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41 bool isWriting_;
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42
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43 public:
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44 PImpl() :
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45 isWriting_(true)
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46 {
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47 stream_.open(file_.GetPath(), std::ofstream::out | std::ofstream::binary);
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48 if (!stream_.good())
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49 {
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50 throw OrthancException(ErrorCode_CannotWriteFile);
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51 }
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52 }
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53
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54 ~PImpl()
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55 {
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56 if (isWriting_)
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57 {
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58 stream_.close();
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59 }
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60 }
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61
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62 void Append(const char* buffer,
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63 size_t size)
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64 {
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65 if (!isWriting_)
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66 {
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67 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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68 }
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69
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70 if (size > 0)
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71 {
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72 stream_.write(buffer, size);
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73 if (!stream_.good())
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74 {
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75 stream_.close();
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76 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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77 }
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78 }
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79 }
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80
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81 void Read(std::string& target)
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82 {
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83 if (isWriting_)
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84 {
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85 stream_.close();
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86 isWriting_ = false;
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87 }
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88
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89 file_.Read(target);
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90 }
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91 };
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92
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93
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94 FileBuffer::FileBuffer() :
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95 pimpl_(new PImpl)
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96 {
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97 }
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98
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99
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100 void FileBuffer::Append(const char* buffer,
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101 size_t size)
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102 {
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103 assert(pimpl_.get() != NULL);
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104 pimpl_->Append(buffer, size);
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105 }
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106
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107
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108 void FileBuffer::Read(std::string& target)
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109 {
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110 assert(pimpl_.get() != NULL);
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111 pimpl_->Read(target);
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112 }
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113 }