Mercurial > hg > orthanc

annotate Plugins/Samples/Common/SimplifiedOrthancDataset.cpp @ 2973:9b734c3e1095

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more defensive parsing of responses
author am@osimis.io
date Thu, 06 Dec 2018 10:39:08 +0100
parents 878b59270859
children 4e43e67f8ecf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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) 2017-2018 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 "SimplifiedOrthancDataset.h"
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35
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36 #include "OrthancPluginException.h"
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37
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38 namespace OrthancPlugins
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39 {
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40 const Json::Value* SimplifiedOrthancDataset::LookupPath(const DicomPath& path) const
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41 {
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42 const Json::Value* content = &root_;
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43
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44 for (unsigned int depth = 0; depth < path.GetPrefixLength(); depth++)
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45 {
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46 const char* name = path.GetPrefixTag(depth).GetName();
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47 if (content->type() != Json::objectValue)
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48 {
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49 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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50 }
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51
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52 if (!content->isMember(name))
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53 {
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54 return NULL;
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55 }
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56
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57 const Json::Value& sequence = (*content) [name];
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58 if (sequence.type() != Json::arrayValue)
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59 {
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60 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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61 }
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62
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63 size_t index = path.GetPrefixIndex(depth);
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64 if (index >= sequence.size())
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65 {
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66 return NULL;
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67 }
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68 else
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69 {
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70 content = &sequence[static_cast<Json::Value::ArrayIndex>(index)];
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71 }
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72 }
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73
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74 const char* name = path.GetFinalTag().GetName();
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75
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76 if (content->type() != Json::objectValue)
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77 {
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78 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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79 }
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80 if (!content->isMember(name))
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81 {
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82 return NULL;
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83 }
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84 else
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85 {
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86 return &((*content) [name]);
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87 }
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88 }
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89
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90
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91 void SimplifiedOrthancDataset::CheckRoot() const
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92 {
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93 if (root_.type() != Json::objectValue)
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94 {
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95 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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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 SimplifiedOrthancDataset::SimplifiedOrthancDataset(IOrthancConnection& orthanc,
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101 const std::string& uri)
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102 {
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103 IOrthancConnection::RestApiGet(root_, orthanc, uri);
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104 CheckRoot();
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105 }
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106
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107
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108 SimplifiedOrthancDataset::SimplifiedOrthancDataset(const std::string& content)
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109 {
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110 IOrthancConnection::ParseJson(root_, content);
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111 CheckRoot();
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112 }
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113
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114
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115 bool SimplifiedOrthancDataset::GetStringValue(std::string& result,
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116 const DicomPath& path) const
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117 {
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118 const Json::Value* value = LookupPath(path);
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119
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120 if (value == NULL)
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121 {
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122 return false;
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123 }
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124 else if (value->type() != Json::stringValue)
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125 {
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126 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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127 }
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128 else
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129 {
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130 result = value->asString();
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131 return true;
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132 }
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133 }
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134
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135
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136 bool SimplifiedOrthancDataset::GetSequenceSize(size_t& size,
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137 const DicomPath& path) const
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138 {
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139 const Json::Value* sequence = LookupPath(path);
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140
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141 if (sequence == NULL)
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142 {
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143 // Inexistent path
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144 return false;
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145 }
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146 else if (sequence->type() != Json::arrayValue)
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147 {
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148 // Not a sequence
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149 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
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150 }
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151 else
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152 {
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153 size = sequence->size();
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154 return true;
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155 }
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156 }
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157 }