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annotate Core/HttpServer/HttpOutput.h @ 1517:4f8c8ef114db

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Aug 2015 10:32:34 +0200
parents 7962563129c9
children 8bd0d897763f
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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33 #pragma once
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34
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35 #include <list>
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36 #include <string>
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37 #include <stdint.h>
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38 #include "../Enumerations.h"
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39 #include "IHttpOutputStream.h"
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40 #include "../Uuid.h"
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41
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42 namespace Orthanc
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43 {
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44 class HttpOutput : public boost::noncopyable
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45 {
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46 private:
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47 typedef std::list< std::pair<std::string, std::string> > Header;
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48
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49 class StateMachine : public boost::noncopyable
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50 {
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51 public:
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52 enum State
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53 {
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54 State_WritingHeader,
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55 State_WritingBody,
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56 State_WritingMultipart,
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57 State_Done
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58 };
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60 private:
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61 IHttpOutputStream& stream_;
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62 State state_;
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63
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64 HttpStatus status_;
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65 bool hasContentLength_;
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66 uint64_t contentLength_;
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67 uint64_t contentPosition_;
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68 bool keepAlive_;
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69 std::list<std::string> headers_;
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70
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71 std::string multipartBoundary_;
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72 std::string multipartContentType_;
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73
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74 public:
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75 StateMachine(IHttpOutputStream& stream,
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76 bool isKeepAlive);
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78 ~StateMachine();
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79
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80 void SetHttpStatus(HttpStatus status);
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81
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82 void SetContentLength(uint64_t length);
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83
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84 void SetContentType(const char* contentType);
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86 void SetContentFilename(const char* filename);
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88 void SetCookie(const std::string& cookie,
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89 const std::string& value);
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91 void AddHeader(const std::string& header,
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92 const std::string& value);
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94 void ClearHeaders();
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96 void SendBody(const void* buffer, size_t length);
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97
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98 void StartMultipart(const std::string& subType,
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99 const std::string& contentType);
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100
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101 void SendMultipartItem(const void* item, size_t length);
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102
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103 void CloseMultipart();
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104
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105 State GetState() const
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106 {
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107 return state_;
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108 }
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109 };
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110
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111 StateMachine stateMachine_;
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112 bool isDeflateAllowed_;
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113 bool isGzipAllowed_;
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114
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115 HttpCompression GetPreferredCompression(size_t bodySize) const;
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116
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117 public:
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118 HttpOutput(IHttpOutputStream& stream,
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119 bool isKeepAlive) :
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120 stateMachine_(stream, isKeepAlive),
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121 isDeflateAllowed_(false),
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122 isGzipAllowed_(false)
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123 {
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124 }
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125
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126 void SetDeflateAllowed(bool allowed)
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127 {
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128 isDeflateAllowed_ = allowed;
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129 }
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130
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131 bool IsDeflateAllowed() const
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132 {
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133 return isDeflateAllowed_;
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134 }
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135
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136 void SetGzipAllowed(bool allowed)
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137 {
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138 isGzipAllowed_ = allowed;
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139 }
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140
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141 bool IsGzipAllowed() const
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142 {
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143 return isGzipAllowed_;
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144 }
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145
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146 void SendStatus(HttpStatus status);
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147
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148 void SetContentType(const char* contentType)
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149 {
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150 stateMachine_.SetContentType(contentType);
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151 }
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152
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153 void SetContentFilename(const char* filename)
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154 {
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155 stateMachine_.SetContentFilename(filename);
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156 }
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157
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158 void SetContentLength(uint64_t length)
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159 {
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160 stateMachine_.SetContentLength(length);
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161 }
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162
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163 void SetCookie(const std::string& cookie,
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164 const std::string& value)
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165 {
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166 stateMachine_.SetCookie(cookie, value);
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167 }
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168
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169 void AddHeader(const std::string& key,
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170 const std::string& value)
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171 {
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172 stateMachine_.AddHeader(key, value);
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173 }
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174
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175 void SendBody(const void* buffer,
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176 size_t length);
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177
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178 void SendBody(const std::string& str);
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179
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180 void SendBody();
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181
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182 void SendMethodNotAllowed(const std::string& allowed);
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183
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184 void Redirect(const std::string& path);
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185
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186 void SendUnauthorized(const std::string& realm);
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187
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188 void StartMultipart(const std::string& subType,
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189 const std::string& contentType)
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190 {
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191 stateMachine_.StartMultipart(subType, contentType);
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192 }
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193
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194 void SendMultipartItem(const std::string& item);
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195
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196 void SendMultipartItem(const void* item, size_t size)
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197 {
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198 stateMachine_.SendMultipartItem(item, size);
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199 }
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200
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201 void CloseMultipart()
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202 {
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203 stateMachine_.CloseMultipart();
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204 }
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205
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206 bool IsWritingMultipart() const
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207 {
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208 return stateMachine_.GetState() == StateMachine::State_WritingMultipart;
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209 }
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210 };
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211 }