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annotate OrthancServer/Sources/OrthancRestApi/OrthancRestChanges.cpp @ 4555:456ed3fcff81 db-changes

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 03 Mar 2021 17:13:41 +0100
parents d9473bd5ed43
children f0038043fb97 7053502fbf97
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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) 2017-2021 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 "../PrecompiledHeadersServer.h"
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35 #include "OrthancRestApi.h"
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36
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37 #include "../ServerContext.h"
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38
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39 namespace Orthanc
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40 {
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41 // Changes API --------------------------------------------------------------
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42
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43 static void GetSinceAndLimit(int64_t& since,
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44 unsigned int& limit,
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45 bool& last,
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46 const RestApiGetCall& call)
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47 {
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48 static const unsigned int DEFAULT_LIMIT = 100;
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49
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50 if (call.HasArgument("last"))
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51 {
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52 last = true;
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53 return;
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54 }
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55
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56 last = false;
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57
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58 try
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59 {
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60 since = boost::lexical_cast<int64_t>(call.GetArgument("since", "0"));
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61 limit = boost::lexical_cast<unsigned int>(call.GetArgument("limit", boost::lexical_cast<std::string>(DEFAULT_LIMIT)));
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62 }
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63 catch (boost::bad_lexical_cast&)
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64 {
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65 since = 0;
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66 limit = DEFAULT_LIMIT;
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67 return;
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68 }
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69 }
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70
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71 static void GetChanges(RestApiGetCall& call)
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72 {
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73 if (call.IsDocumentation())
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74 {
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75 call.GetDocumentation()
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76 .SetTag("Tracking changes")
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77 .SetSummary("List changes")
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78 .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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79 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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80 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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81 .AddAnswerType(MimeType_Json, "The list of changes")
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82 .SetAnswerField("Changes", RestApiCallDocumentation::Type_JsonListOfObjects, "The individual changes")
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83 .SetAnswerField("Done", RestApiCallDocumentation::Type_Boolean,
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84 "Whether the last reported change is the last of the full history")
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85 .SetAnswerField("Last", RestApiCallDocumentation::Type_Number,
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86 "The index of the last reported change, can be used for the `since` argument in subsequent calls to this route")
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87 .SetHttpGetSample("https://demo.orthanc-server.com/changes?since=0&limit=2", true);
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88 return;
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89 }
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90
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91 ServerContext& context = OrthancRestApi::GetContext(call);
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92
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93 //std::string filter = GetArgument(getArguments, "filter", "");
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94 int64_t since;
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95 unsigned int limit;
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96 bool last;
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97 GetSinceAndLimit(since, limit, last, call);
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98
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99 Json::Value result;
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100 if (last)
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101 {
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102 context.GetIndex().GetLastChange(result);
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103 }
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104 else
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105 {
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106 context.GetIndex().GetChanges(result, since, limit);
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107 }
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108
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109 call.GetOutput().AnswerJson(result);
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110 }
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111
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112
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113 static void DeleteChanges(RestApiDeleteCall& call)
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114 {
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115 if (call.IsDocumentation())
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116 {
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117 call.GetDocumentation()
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118 .SetTag("Tracking changes")
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119 .SetSummary("Clear changes")
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120 .SetDescription("Clear the full history stored in the changes log");
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121 return;
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122 }
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123
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124 OrthancRestApi::GetIndex(call).DeleteChanges();
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125 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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126 }
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127
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128
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129 // Exports API --------------------------------------------------------------
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130
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131 static void GetExports(RestApiGetCall& call)
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132 {
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133 if (call.IsDocumentation())
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134 {
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135 call.GetDocumentation()
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136 .SetTag("Tracking changes")
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137 .SetSummary("List exports")
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138 .SetDescription("For medical traceability, Orthanc can be configured to store a log of all the resources "
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139 "that have been exported to remote modalities. In auto-routing scenarios, it is important "
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140 "to prevent this log to grow indefinitely as incoming instances are routed. You can either "
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141 "disable this logging by setting the option `LogExportedResources` to `false` in the "
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142 "configuration file, or periodically clear this log by `DELETE`-ing this URI. This route "
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143 "might be removed in future versions of Orthanc.")
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144 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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145 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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146 .AddAnswerType(MimeType_Json, "The list of exports");
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147 return;
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148 }
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149
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150 ServerContext& context = OrthancRestApi::GetContext(call);
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151
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152 int64_t since;
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153 unsigned int limit;
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154 bool last;
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155 GetSinceAndLimit(since, limit, last, call);
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156
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157 Json::Value result;
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158 if (last)
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159 {
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160 context.GetIndex().GetLastExportedResource(result);
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161 }
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162 else
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163 {
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164 context.GetIndex().GetExportedResources(result, since, limit);
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165 }
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166
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167 call.GetOutput().AnswerJson(result);
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168 }
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169
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170
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171 static void DeleteExports(RestApiDeleteCall& call)
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172 {
4414
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173 if (call.IsDocumentation())
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174 {
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175 call.GetDocumentation()
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176 .SetTag("Tracking changes")
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177 .SetSummary("Clear exports")
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178 .SetDescription("Clear the full history stored in the exports log");
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179 return;
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180 }
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181
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182 OrthancRestApi::GetIndex(call).DeleteExportedResources();
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183 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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184 }
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185
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186
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187 void OrthancRestApi::RegisterChanges()
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188 {
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189 Register("/changes", GetChanges);
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190 Register("/changes", DeleteChanges);
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191 Register("/exports", GetExports);
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192 Register("/exports", DeleteExports);
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193 }
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194 }