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annotate OrthancServer/Sources/OrthancRestApi/OrthancRestChanges.cpp @ 5735:0ca3e7c86b5d

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author Alain Mazy <am@orthanc.team>
date Mon, 29 Jul 2024 14:41:38 +0200
parents f7adfb22e20e
children ca06dde85358
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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 General Public License as
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11 * published by the Free Software Foundation, either version 3 of the
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12 * 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 * 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 General Public License
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20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "../PrecompiledHeadersServer.h"
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25 #include "OrthancRestApi.h"
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26
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27 #include "../ServerContext.h"
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28
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29 namespace Orthanc
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30 {
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31 // Changes API --------------------------------------------------------------
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32
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33 static void GetSinceAndLimit(int64_t& since,
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34 unsigned int& limit,
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35 bool& last,
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36 const RestApiGetCall& call)
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37 {
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38 static const unsigned int DEFAULT_LIMIT = 100;
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39
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40 if (call.HasArgument("last"))
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41 {
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42 last = true;
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43 return;
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44 }
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46 last = false;
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47
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48 try
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49 {
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50 since = boost::lexical_cast<int64_t>(call.GetArgument("since", "0"));
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51 limit = boost::lexical_cast<unsigned int>(call.GetArgument("limit", boost::lexical_cast<std::string>(DEFAULT_LIMIT)));
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52 }
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53 catch (boost::bad_lexical_cast&)
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54 {
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55 since = 0;
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56 limit = DEFAULT_LIMIT;
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57 return;
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58 }
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59 }
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60
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61 static void GetChanges(RestApiGetCall& call)
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62 {
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63 if (call.IsDocumentation())
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64 {
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65 call.GetDocumentation()
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66 .SetTag("Tracking changes")
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67 .SetSummary("List changes")
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68 .SetDescription("Whenever Orthanc receives a new DICOM instance, this event is recorded in the so-called _Changes Log_. This enables remote scripts to react to the arrival of new DICOM resources. A typical application is auto-routing, where an external script waits for a new DICOM instance to arrive into Orthanc, then forward this instance to another modality. Please note that, when resources are deleted, their corresponding change entries are also removed from the Changes Log, which helps ensuring that this log does not grow indefinitely.")
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69 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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70 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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71 .AddAnswerType(MimeType_Json, "The list of changes")
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72 .SetAnswerField("Changes", RestApiCallDocumentation::Type_JsonListOfObjects, "The individual changes")
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73 .SetAnswerField("Done", RestApiCallDocumentation::Type_Boolean,
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74 "Whether the last reported change is the last of the full history")
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75 .SetAnswerField("Last", RestApiCallDocumentation::Type_Number,
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76 "The index of the last reported change, can be used for the `since` argument in subsequent calls to this route")
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77 .SetHttpGetSample("https://orthanc.uclouvain.be/demo/changes?since=0&limit=2", true);
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78 return;
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79 }
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80
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81 ServerContext& context = OrthancRestApi::GetContext(call);
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82
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83 //std::string filter = GetArgument(getArguments, "filter", "");
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84 int64_t since;
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85 unsigned int limit;
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86 bool last;
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87 GetSinceAndLimit(since, limit, last, call);
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88
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89 Json::Value result;
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90 if (last)
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91 {
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92 context.GetIndex().GetLastChange(result);
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93 }
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94 else
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95 {
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96 context.GetIndex().GetChanges(result, since, limit);
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97 }
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98
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99 call.GetOutput().AnswerJson(result);
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100 }
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101
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102
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103 static void DeleteChanges(RestApiDeleteCall& call)
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104 {
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105 if (call.IsDocumentation())
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106 {
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107 call.GetDocumentation()
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108 .SetTag("Tracking changes")
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109 .SetSummary("Clear changes")
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110 .SetDescription("Clear the full history stored in the changes log");
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111 return;
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112 }
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113
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114 OrthancRestApi::GetIndex(call).DeleteChanges();
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115 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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116 }
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117
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118
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119 // Exports API --------------------------------------------------------------
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120
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121 static void GetExports(RestApiGetCall& call)
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122 {
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123 if (call.IsDocumentation())
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124 {
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125 call.GetDocumentation()
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126 .SetTag("Tracking changes")
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127 .SetSummary("List exports")
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128 .SetDescription("For medical traceability, Orthanc can be configured to store a log of all the resources "
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129 "that have been exported to remote modalities. In auto-routing scenarios, it is important "
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130 "to prevent this log to grow indefinitely as incoming instances are routed. You can either "
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131 "disable this logging by setting the option `LogExportedResources` to `false` in the "
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132 "configuration file, or periodically clear this log by `DELETE`-ing this URI. This route "
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133 "might be removed in future versions of Orthanc.")
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134 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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135 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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136 .AddAnswerType(MimeType_Json, "The list of exports");
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137 return;
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138 }
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139
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140 ServerContext& context = OrthancRestApi::GetContext(call);
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141
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142 int64_t since;
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143 unsigned int limit;
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144 bool last;
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145 GetSinceAndLimit(since, limit, last, call);
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146
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147 Json::Value result;
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148 if (last)
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149 {
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150 context.GetIndex().GetLastExportedResource(result);
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151 }
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152 else
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153 {
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154 context.GetIndex().GetExportedResources(result, since, limit);
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155 }
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156
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157 call.GetOutput().AnswerJson(result);
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158 }
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159
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160
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161 static void DeleteExports(RestApiDeleteCall& call)
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162 {
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163 if (call.IsDocumentation())
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164 {
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165 call.GetDocumentation()
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166 .SetTag("Tracking changes")
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167 .SetSummary("Clear exports")
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168 .SetDescription("Clear the full history stored in the exports log");
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169 return;
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170 }
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171
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172 OrthancRestApi::GetIndex(call).DeleteExportedResources();
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173 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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174 }
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175
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176
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177 void OrthancRestApi::RegisterChanges()
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178 {
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179 Register("/changes", GetChanges);
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180 Register("/changes", DeleteChanges);
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181 Register("/exports", GetExports);
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182 Register("/exports", DeleteExports);
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183 }
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184 }