Mercurial > hg > orthanc

annotate Core/Lua/LuaFunctionCall.cpp @ 3584:75268c1ea309

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Added note about metadata returned string lifetime
author Benjamin Golinvaux <bgo@osimis.io>
date Sun, 01 Dec 2019 11:12:48 +0100
parents dd1e68f2d0c0
children 94f4a18a79cc
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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) 2017-2019 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 "../PrecompiledHeaders.h"
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35 #include "LuaFunctionCall.h"
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36
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37 #include "../OrthancException.h"
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38 #include "../Logging.h"
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39
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40 #include <cassert>
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41 #include <stdio.h>
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42 #include <boost/lexical_cast.hpp>
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43
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44 namespace Orthanc
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45 {
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46 void LuaFunctionCall::CheckAlreadyExecuted()
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47 {
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48 if (isExecuted_)
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49 {
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50 throw OrthancException(ErrorCode_LuaAlreadyExecuted);
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51 }
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52 }
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53
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54 LuaFunctionCall::LuaFunctionCall(LuaContext& context,
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55 const char* functionName) :
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56 context_(context),
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57 isExecuted_(false)
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58 {
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59 // Clear the stack to fulfill the invariant
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60 lua_settop(context_.lua_, 0);
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61 lua_getglobal(context_.lua_, functionName);
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62 }
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63
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64 void LuaFunctionCall::PushString(const std::string& value)
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65 {
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66 CheckAlreadyExecuted();
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67 lua_pushlstring(context_.lua_, value.c_str(), value.size());
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68 }
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69
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70 void LuaFunctionCall::PushBoolean(bool value)
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71 {
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72 CheckAlreadyExecuted();
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73 lua_pushboolean(context_.lua_, value);
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74 }
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75
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76 void LuaFunctionCall::PushInteger(int value)
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77 {
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78 CheckAlreadyExecuted();
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79 lua_pushinteger(context_.lua_, value);
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80 }
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81
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82 void LuaFunctionCall::PushDouble(double value)
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83 {
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84 CheckAlreadyExecuted();
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85 lua_pushnumber(context_.lua_, value);
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86 }
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87
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88 void LuaFunctionCall::PushJson(const Json::Value& value)
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89 {
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90 CheckAlreadyExecuted();
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91 context_.PushJson(value);
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92 }
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93
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94 void LuaFunctionCall::ExecuteInternal(int numOutputs)
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95 {
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96 CheckAlreadyExecuted();
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97
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98 assert(lua_gettop(context_.lua_) >= 1);
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99 int nargs = lua_gettop(context_.lua_) - 1;
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100 int error = lua_pcall(context_.lua_, nargs, numOutputs, 0);
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101
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102 if (error)
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103 {
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104 assert(lua_gettop(context_.lua_) >= 1);
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105
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106 std::string description(lua_tostring(context_.lua_, -1));
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107 lua_pop(context_.lua_, 1); /* pop error message from the stack */
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108
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109 throw OrthancException(ErrorCode_CannotExecuteLua, description);
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110 }
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111
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112 if (lua_gettop(context_.lua_) < numOutputs)
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113 {
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114 throw OrthancException(ErrorCode_LuaBadOutput);
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115 }
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116
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117 isExecuted_ = true;
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118 }
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119
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120 bool LuaFunctionCall::ExecutePredicate()
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121 {
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122 ExecuteInternal(1);
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123
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124 if (!lua_isboolean(context_.lua_, 1))
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125 {
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126 throw OrthancException(ErrorCode_NotLuaPredicate);
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127 }
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128
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129 return lua_toboolean(context_.lua_, 1) != 0;
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130 }
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132
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133 void LuaFunctionCall::ExecuteToJson(Json::Value& result,
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134 bool keepStrings)
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135 {
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136 ExecuteInternal(1);
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137 context_.GetJson(result, context_.lua_, lua_gettop(context_.lua_), keepStrings);
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138 }
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140
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141 void LuaFunctionCall::ExecuteToString(std::string& result)
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142 {
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143 ExecuteInternal(1);
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144
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145 int top = lua_gettop(context_.lua_);
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146 if (lua_isstring(context_.lua_, top))
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147 {
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148 result = lua_tostring(context_.lua_, top);
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149 }
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150 else
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151 {
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152 throw OrthancException(ErrorCode_LuaReturnsNoString);
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153 }
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154 }
1959
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155
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156
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157 void LuaFunctionCall::PushStringMap(const std::map<std::string, std::string>& value)
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158 {
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159 Json::Value json = Json::objectValue;
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160
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161 for (std::map<std::string, std::string>::const_iterator
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162 it = value.begin(); it != value.end(); ++it)
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163 {
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164 json[it->first] = it->second;
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165 }
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166
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167 PushJson(json);
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168 }
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169
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170
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171 void LuaFunctionCall::PushDicom(const DicomMap& dicom)
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172 {
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173 DicomArray a(dicom);
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174 PushDicom(a);
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175 }
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176
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177
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178 void LuaFunctionCall::PushDicom(const DicomArray& dicom)
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179 {
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180 Json::Value value = Json::objectValue;
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181
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182 for (size_t i = 0; i < dicom.GetSize(); i++)
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183 {
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184 const DicomValue& v = dicom.GetElement(i).GetValue();
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185 std::string s = (v.IsNull() || v.IsBinary()) ? "" : v.GetContent();
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186 value[dicom.GetElement(i).GetTag().Format()] = s;
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187 }
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188
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189 PushJson(value);
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190 }
386
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191 }