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annotate OrthancFramework/Sources/RestApi/RestApiOutput.cpp @ 4394:f7104e9d044c

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functions to read/write JSON in OrthancPluginCppWrapper.h
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 22 Dec 2020 08:11:37 +0100
parents 3af1d763763a
children d9473bd5ed43
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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) 2017-2020 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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <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 "../PrecompiledHeaders.h"
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24 #include "RestApiOutput.h"
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25
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26 #include "../Logging.h"
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27 #include "../OrthancException.h"
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28 #include "../Toolbox.h"
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29
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30 #include <boost/lexical_cast.hpp>
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32
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33 namespace Orthanc
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34 {
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35 RestApiOutput::RestApiOutput(HttpOutput& output,
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36 HttpMethod method) :
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37 output_(output),
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38 method_(method),
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39 convertJsonToXml_(false)
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40 {
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41 alreadySent_ = false;
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42 }
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44 RestApiOutput::~RestApiOutput()
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45 {
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46 }
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48 void RestApiOutput::Finalize()
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49 {
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50 if (!alreadySent_)
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51 {
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52 if (method_ == HttpMethod_Post)
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53 {
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54 output_.SendStatus(HttpStatus_400_BadRequest);
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55 }
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56 else
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57 {
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58 output_.SendStatus(HttpStatus_404_NotFound);
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59 }
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60 }
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61 }
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62
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63 void RestApiOutput::CheckStatus()
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64 {
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65 if (alreadySent_)
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66 {
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67 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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68 }
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69 }
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71
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72 void RestApiOutput::AnswerStream(IHttpStreamAnswer& stream)
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73 {
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74 CheckStatus();
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75 output_.Answer(stream);
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76 alreadySent_ = true;
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77 }
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78
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79 void RestApiOutput::AnswerJson(const Json::Value& value)
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80 {
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81 CheckStatus();
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82
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83 if (convertJsonToXml_)
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84 {
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85 #if ORTHANC_ENABLE_PUGIXML == 1
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86 std::string s;
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87 Toolbox::JsonToXml(s, value);
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88
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89 output_.SetContentType(MIME_XML_UTF8);
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90 output_.Answer(s);
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91 #else
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92 throw OrthancException(ErrorCode_InternalError,
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93 "Orthanc was compiled without XML support");
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94 #endif
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95 }
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96 else
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97 {
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98 std::string s;
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99 Toolbox::WriteStyledJson(s, value);
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100 output_.SetContentType(MIME_JSON_UTF8);
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101 output_.Answer(s);
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102 }
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103
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104 alreadySent_ = true;
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105 }
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106
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107 void RestApiOutput::AnswerBuffer(const std::string& buffer,
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108 MimeType contentType)
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109 {
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110 AnswerBuffer(buffer.size() == 0 ? NULL : buffer.c_str(),
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111 buffer.size(), contentType);
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112 }
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113
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114 void RestApiOutput::AnswerBuffer(const void* buffer,
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115 size_t length,
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116 MimeType contentType)
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117 {
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118 CheckStatus();
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119
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120 if (convertJsonToXml_ &&
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121 contentType == MimeType_Json)
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122 {
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123 Json::Value json;
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124 if (Toolbox::ReadJson(json, buffer, length))
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125 {
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126 AnswerJson(json);
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127 }
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128 else
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129 {
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130 throw OrthancException(ErrorCode_BadFileFormat,
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131 "The REST API tries and answers with an invalid JSON file");
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132 }
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133 }
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134 else
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135 {
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136 output_.SetContentType(contentType);
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137 output_.Answer(buffer, length);
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138 alreadySent_ = true;
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139 }
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140 }
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141
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142 void RestApiOutput::Redirect(const std::string& path)
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143 {
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144 CheckStatus();
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145 output_.Redirect(path);
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146 alreadySent_ = true;
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147 }
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148
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149 void RestApiOutput::SignalErrorInternal(HttpStatus status,
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150 const char* message,
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151 size_t messageSize)
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152 {
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153 if (status != HttpStatus_400_BadRequest &&
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154 status != HttpStatus_403_Forbidden &&
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155 status != HttpStatus_500_InternalServerError &&
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156 status != HttpStatus_415_UnsupportedMediaType)
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157 {
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158 throw OrthancException(ErrorCode_BadHttpStatusInRest);
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159 }
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160
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161 CheckStatus();
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162 output_.SendStatus(status, message, messageSize);
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163 alreadySent_ = true;
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164 }
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165
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166 void RestApiOutput::SignalError(HttpStatus status)
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167 {
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168 SignalErrorInternal(status, NULL, 0);
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169 }
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170
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171 void RestApiOutput::SignalError(HttpStatus status,
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172 const std::string& message)
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173 {
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174 SignalErrorInternal(status, message.c_str(), message.size());
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175 }
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176
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177 void RestApiOutput::SetCookie(const std::string& name,
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178 const std::string& value,
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179 unsigned int maxAge)
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180 {
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181 if (name.find(";") != std::string::npos ||
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182 name.find(" ") != std::string::npos ||
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183 value.find(";") != std::string::npos ||
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184 value.find(" ") != std::string::npos)
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185 {
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186 throw OrthancException(ErrorCode_NotImplemented);
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187 }
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188
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189 CheckStatus();
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190
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191 std::string v = value + ";path=/";
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192
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193 if (maxAge != 0)
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194 {
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195 v += ";max-age=" + boost::lexical_cast<std::string>(maxAge);
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196 }
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197
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198 output_.SetCookie(name, v);
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199 }
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200
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201 void RestApiOutput::ResetCookie(const std::string& name)
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202 {
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203 // This marks the cookie to be deleted by the browser in 1 second,
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204 // and before it actually gets deleted, its value is set to the
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205 // empty string
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206 SetCookie(name, "", 1);
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207 }
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208 }