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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
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4 * Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "CompressedFileStorageAccessor.h"
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34
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35 #include "../OrthancException.h"
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36 #include "FileStorageAccessor.h"
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37 #include "../HttpServer/BufferHttpSender.h"
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38
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39 namespace Orthanc
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40 {
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41 std::string CompressedFileStorageAccessor::WriteInternal(const void* data,
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42 size_t size)
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43 {
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44 switch (compressionType_)
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45 {
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46 case CompressionType_None:
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47 return storage_.Create(data, size);
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48
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49 case CompressionType_Zlib:
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50 {
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51 std::string compressed;
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52 zlib_.Compress(compressed, data, size);
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53 return storage_.Create(compressed);
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54 }
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55
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56 default:
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57 throw OrthancException(ErrorCode_NotImplemented);
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58 }
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59 }
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60
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61 CompressedFileStorageAccessor::CompressedFileStorageAccessor(FileStorage& storage) :
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62 storage_(storage)
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63 {
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64 compressionType_ = CompressionType_Zlib;
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65 }
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66
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67 void CompressedFileStorageAccessor::Read(std::string& content,
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68 const std::string& uuid)
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69 {
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70 switch (compressionType_)
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71 {
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72 case CompressionType_None:
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73 storage_.ReadFile(content, uuid);
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74 break;
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75
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76 case CompressionType_Zlib:
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77 {
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78 std::string compressed;
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79 storage_.ReadFile(compressed, uuid);
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80 zlib_.Uncompress(content, compressed);
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81 break;
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82 }
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83
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84 default:
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85 throw OrthancException(ErrorCode_NotImplemented);
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86 }
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87 }
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88
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89 HttpFileSender* CompressedFileStorageAccessor::ConstructHttpFileSender(const std::string& uuid)
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90 {
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91 switch (compressionType_)
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92 {
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93 case CompressionType_None:
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94 {
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95 FileStorageAccessor uncompressedAccessor(storage_);
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96 return uncompressedAccessor.ConstructHttpFileSender(uuid);
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97 }
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98
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99 case CompressionType_Zlib:
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100 {
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101 std::string compressed;
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102 storage_.ReadFile(compressed, uuid);
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103
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104 std::auto_ptr<BufferHttpSender> sender(new BufferHttpSender);
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105 zlib_.Uncompress(sender->GetBuffer(), compressed);
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106
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107 return sender.release();
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108 }
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109
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110 default:
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111 throw OrthancException(ErrorCode_NotImplemented);
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112 }
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113 }
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114 }
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