Mercurial > hg > orthanc

annotate OrthancFramework/Sources/HttpServer/HttpOutput.h @ 4845:02d77189d8ba received-instance-callback

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added ReceivedInstanceCallback + sample C++ plugin
author Alain Mazy <am@osimis.io>
date Thu, 09 Dec 2021 17:22:40 +0100
parents 7053502fbf97
children 43e613a7756b
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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 * Copyright (C) 2021-2021 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 Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the 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 * Lesser 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 Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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24 #pragma once
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25
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26 #include "../Enumerations.h"
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27 #include "IHttpOutputStream.h"
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28 #include "IHttpStreamAnswer.h"
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29
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30 #include <list>
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31 #include <string>
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32 #include <stdint.h>
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33 #include <map>
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34 #include <vector>
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35
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36 namespace Orthanc
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37 {
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38 class ORTHANC_PUBLIC HttpOutput : public boost::noncopyable
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39 {
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40 private:
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41 typedef std::list< std::pair<std::string, std::string> > Header;
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42
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43 class StateMachine : public boost::noncopyable
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44 {
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45 public:
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46 enum State
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47 {
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48 State_WritingHeader,
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49 State_WritingBody,
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50 State_WritingMultipart,
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51 State_Done,
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52 State_WritingStream
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53 };
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54
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55 private:
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56 IHttpOutputStream& stream_;
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57 State state_;
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58
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59 HttpStatus status_;
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60 bool hasContentLength_;
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61 uint64_t contentLength_;
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62 uint64_t contentPosition_;
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63 bool keepAlive_;
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64 std::list<std::string> headers_;
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65
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66 std::string multipartBoundary_;
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67 std::string multipartContentType_;
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68
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69 void StartStreamInternal(const std::string& contentType);
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71 public:
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72 StateMachine(IHttpOutputStream& stream,
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73 bool isKeepAlive);
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75 ~StateMachine();
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76
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77 void SetHttpStatus(HttpStatus status);
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78
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79 void SetContentLength(uint64_t length);
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81 void SetContentType(const char* contentType);
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83 void SetContentFilename(const char* filename);
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84
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85 void SetCookie(const std::string& cookie,
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86 const std::string& value);
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88 void AddHeader(const std::string& header,
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89 const std::string& value);
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91 void ClearHeaders();
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93 void SendBody(const void* buffer, size_t length);
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94
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95 void StartMultipart(const std::string& subType,
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96 const std::string& contentType);
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97
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98 void SendMultipartItem(const void* item,
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99 size_t length,
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100 const std::map<std::string, std::string>& headers);
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101
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102 void CloseMultipart();
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103
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104 void CloseBody();
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105
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106 State GetState() const
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107 {
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108 return state_;
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109 }
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111 void CheckHeadersCompatibilityWithMultipart() const;
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113 void StartStream(const std::string& contentType);
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115 void SendStreamItem(const void* data,
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116 size_t size);
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118 void CloseStream();
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119 };
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120
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121 StateMachine stateMachine_;
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122 bool isDeflateAllowed_;
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123 bool isGzipAllowed_;
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124
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125 HttpCompression GetPreferredCompression(size_t bodySize) const;
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126
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127 public:
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128 HttpOutput(IHttpOutputStream& stream,
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129 bool isKeepAlive);
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130
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131 void SetDeflateAllowed(bool allowed);
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132
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133 bool IsDeflateAllowed() const;
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134
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135 void SetGzipAllowed(bool allowed);
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136
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137 bool IsGzipAllowed() const;
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138
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139 void SendStatus(HttpStatus status,
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140 const char* message,
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141 size_t messageSize);
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142
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143 void SendStatus(HttpStatus status);
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144
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145 void SendStatus(HttpStatus status,
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146 const std::string& message);
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147
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148 void SetContentType(MimeType contentType);
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149
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150 void SetContentType(const std::string& contentType);
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151
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152 void SetContentFilename(const char* filename);
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153
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154 void SetCookie(const std::string& cookie,
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155 const std::string& value);
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156
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157 void AddHeader(const std::string& key,
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158 const std::string& value);
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159
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160 void Answer(const void* buffer,
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161 size_t length);
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162
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163 void Answer(const std::string& str);
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164
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165 void AnswerEmpty();
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166
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167 void SendMethodNotAllowed(const std::string& allowed);
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168
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169 void Redirect(const std::string& path);
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170
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171 void SendUnauthorized(const std::string& realm);
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172
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173 void StartMultipart(const std::string& subType,
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174 const std::string& contentType);
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175
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176 void SendMultipartItem(const void* item,
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177 size_t size,
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178 const std::map<std::string, std::string>& headers);
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179
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180 void CloseMultipart();
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181
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182 bool IsWritingMultipart() const;
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183
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184 void Answer(IHttpStreamAnswer& stream);
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185
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186 /**
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187 * This method is a replacement to the combination
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188 * "StartMultipart()" + "SendMultipartItem()". It generates the
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189 * same answer, but it gives a chance to compress the body if
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190 * "Accept-Encoding: gzip" is provided by the client, which is not
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191 * possible in chunked transfers.
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192 **/
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193 void AnswerMultipartWithoutChunkedTransfer(
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194 const std::string& subType,
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195 const std::string& contentType,
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196 const std::vector<const void*>& parts,
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197 const std::vector<size_t>& sizes,
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198 const std::vector<const std::map<std::string, std::string>*>& headers);
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199
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200 /**
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201 * Contrarily to "Answer()", this method doesn't bufferizes the
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202 * stream before sending it, which reduces memory but cannot be
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203 * used to handle compression using "Content-Encoding".
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204 **/
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205 void AnswerWithoutBuffering(IHttpStreamAnswer& stream);
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206 };
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207 }