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annotate OrthancServer/Sources/OrthancRestApi/OrthancRestChanges.cpp @ 4959:29bcc3f47f2a

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 23 Mar 2022 12:19:59 +0100
parents 6eff25f70121
children 0ea402b4d901
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU General Public License as
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10 * published by the Free Software Foundation, either version 3 of the
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11 * License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU General Public License
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19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "../PrecompiledHeadersServer.h"
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24 #include "OrthancRestApi.h"
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25
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26 #include "../ServerContext.h"
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27
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28 namespace Orthanc
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29 {
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30 // Changes API --------------------------------------------------------------
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31
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32 static void GetSinceAndLimit(int64_t& since,
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33 unsigned int& limit,
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34 bool& last,
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35 const RestApiGetCall& call)
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36 {
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37 static const unsigned int DEFAULT_LIMIT = 100;
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38
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39 if (call.HasArgument("last"))
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40 {
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41 last = true;
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42 return;
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43 }
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44
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45 last = false;
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46
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47 try
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48 {
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49 since = boost::lexical_cast<int64_t>(call.GetArgument("since", "0"));
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50 limit = boost::lexical_cast<unsigned int>(call.GetArgument("limit", boost::lexical_cast<std::string>(DEFAULT_LIMIT)));
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51 }
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52 catch (boost::bad_lexical_cast&)
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53 {
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54 since = 0;
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55 limit = DEFAULT_LIMIT;
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56 return;
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57 }
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58 }
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59
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60 static void GetChanges(RestApiGetCall& call)
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61 {
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62 if (call.IsDocumentation())
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63 {
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64 call.GetDocumentation()
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65 .SetTag("Tracking changes")
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66 .SetSummary("List changes")
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67 .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.")
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68 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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69 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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70 .AddAnswerType(MimeType_Json, "The list of changes")
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71 .SetAnswerField("Changes", RestApiCallDocumentation::Type_JsonListOfObjects, "The individual changes")
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72 .SetAnswerField("Done", RestApiCallDocumentation::Type_Boolean,
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73 "Whether the last reported change is the last of the full history")
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74 .SetAnswerField("Last", RestApiCallDocumentation::Type_Number,
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75 "The index of the last reported change, can be used for the `since` argument in subsequent calls to this route")
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76 .SetHttpGetSample("https://demo.orthanc-server.com/changes?since=0&limit=2", true);
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77 return;
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78 }
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79
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80 ServerContext& context = OrthancRestApi::GetContext(call);
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81
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82 //std::string filter = GetArgument(getArguments, "filter", "");
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83 int64_t since;
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84 unsigned int limit;
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85 bool last;
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86 GetSinceAndLimit(since, limit, last, call);
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87
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88 Json::Value result;
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89 if (last)
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90 {
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91 context.GetIndex().GetLastChange(result);
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92 }
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93 else
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94 {
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95 context.GetIndex().GetChanges(result, since, limit);
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96 }
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97
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98 call.GetOutput().AnswerJson(result);
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99 }
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100
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101
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102 static void DeleteChanges(RestApiDeleteCall& call)
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103 {
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104 if (call.IsDocumentation())
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105 {
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106 call.GetDocumentation()
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107 .SetTag("Tracking changes")
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108 .SetSummary("Clear changes")
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109 .SetDescription("Clear the full history stored in the changes log");
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110 return;
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111 }
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112
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113 OrthancRestApi::GetIndex(call).DeleteChanges();
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114 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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115 }
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116
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117
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118 // Exports API --------------------------------------------------------------
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119
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120 static void GetExports(RestApiGetCall& call)
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121 {
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122 if (call.IsDocumentation())
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123 {
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124 call.GetDocumentation()
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125 .SetTag("Tracking changes")
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126 .SetSummary("List exports")
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127 .SetDescription("For medical traceability, Orthanc can be configured to store a log of all the resources "
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128 "that have been exported to remote modalities. In auto-routing scenarios, it is important "
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129 "to prevent this log to grow indefinitely as incoming instances are routed. You can either "
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130 "disable this logging by setting the option `LogExportedResources` to `false` in the "
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131 "configuration file, or periodically clear this log by `DELETE`-ing this URI. This route "
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132 "might be removed in future versions of Orthanc.")
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133 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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134 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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135 .AddAnswerType(MimeType_Json, "The list of exports");
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136 return;
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137 }
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138
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139 ServerContext& context = OrthancRestApi::GetContext(call);
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140
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141 int64_t since;
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142 unsigned int limit;
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143 bool last;
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144 GetSinceAndLimit(since, limit, last, call);
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145
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146 Json::Value result;
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147 if (last)
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148 {
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149 context.GetIndex().GetLastExportedResource(result);
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150 }
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151 else
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152 {
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153 context.GetIndex().GetExportedResources(result, since, limit);
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154 }
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155
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156 call.GetOutput().AnswerJson(result);
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157 }
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158
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159
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160 static void DeleteExports(RestApiDeleteCall& call)
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161 {
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162 if (call.IsDocumentation())
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163 {
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164 call.GetDocumentation()
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165 .SetTag("Tracking changes")
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166 .SetSummary("Clear exports")
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167 .SetDescription("Clear the full history stored in the exports log");
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168 return;
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169 }
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170
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171 OrthancRestApi::GetIndex(call).DeleteExportedResources();
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172 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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173 }
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174
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175
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176 void OrthancRestApi::RegisterChanges()
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177 {
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178 Register("/changes", GetChanges);
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179 Register("/changes", DeleteChanges);
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180 Register("/exports", GetExports);
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181 Register("/exports", DeleteExports);
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182 }
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183 }