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annotate Core/HttpServer/HttpOutput.h @ 1519:8bd0d897763f

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refactoring: IHttpStreamAnswer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Aug 2015 13:15:16 +0200
parents 4f8c8ef114db
children 3606278d305e
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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 "IHttpStreamAnswer.h"
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41 #include "../Uuid.h"
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42
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43 namespace Orthanc
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44 {
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45 class HttpOutput : public boost::noncopyable
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46 {
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47 private:
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48 typedef std::list< std::pair<std::string, std::string> > Header;
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49
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50 class StateMachine : public boost::noncopyable
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51 {
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52 public:
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53 enum State
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54 {
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55 State_WritingHeader,
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56 State_WritingBody,
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57 State_WritingMultipart,
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58 State_Done
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59 };
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60
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61 private:
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62 IHttpOutputStream& stream_;
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63 State state_;
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64
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65 HttpStatus status_;
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66 bool hasContentLength_;
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67 uint64_t contentLength_;
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68 uint64_t contentPosition_;
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69 bool keepAlive_;
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70 std::list<std::string> headers_;
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71
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72 std::string multipartBoundary_;
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73 std::string multipartContentType_;
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74
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75 public:
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76 StateMachine(IHttpOutputStream& stream,
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77 bool isKeepAlive);
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79 ~StateMachine();
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80
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81 void SetHttpStatus(HttpStatus status);
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82
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83 void SetContentLength(uint64_t length);
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84
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85 void SetContentType(const char* contentType);
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87 void SetContentFilename(const char* filename);
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89 void SetCookie(const std::string& cookie,
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90 const std::string& value);
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92 void AddHeader(const std::string& header,
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93 const std::string& value);
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95 void ClearHeaders();
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97 void SendBody(const void* buffer, size_t length);
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98
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99 void StartMultipart(const std::string& subType,
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100 const std::string& contentType);
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101
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102 void SendMultipartItem(const void* item, size_t length);
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103
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104 void CloseMultipart();
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105
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106 void CloseBody();
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107
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108 State GetState() const
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109 {
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110 return state_;
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111 }
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112 };
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113
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114 StateMachine stateMachine_;
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115 bool isDeflateAllowed_;
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116 bool isGzipAllowed_;
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117
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118 HttpCompression GetPreferredCompression(size_t bodySize) const;
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119
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120 public:
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121 HttpOutput(IHttpOutputStream& stream,
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122 bool isKeepAlive) :
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123 stateMachine_(stream, isKeepAlive),
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124 isDeflateAllowed_(false),
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125 isGzipAllowed_(false)
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126 {
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127 }
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128
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129 void SetDeflateAllowed(bool allowed)
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130 {
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131 isDeflateAllowed_ = allowed;
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132 }
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133
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134 bool IsDeflateAllowed() const
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135 {
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136 return isDeflateAllowed_;
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137 }
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138
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139 void SetGzipAllowed(bool allowed)
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140 {
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141 isGzipAllowed_ = allowed;
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142 }
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143
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144 bool IsGzipAllowed() const
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145 {
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146 return isGzipAllowed_;
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147 }
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148
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149 void SendStatus(HttpStatus status);
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150
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151 void SetContentType(const char* contentType)
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152 {
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153 stateMachine_.SetContentType(contentType);
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154 }
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155
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156 void SetContentFilename(const char* filename)
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157 {
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158 stateMachine_.SetContentFilename(filename);
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159 }
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160
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161 void SetCookie(const std::string& cookie,
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162 const std::string& value)
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163 {
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164 stateMachine_.SetCookie(cookie, value);
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165 }
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166
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167 void AddHeader(const std::string& key,
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168 const std::string& value)
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169 {
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170 stateMachine_.AddHeader(key, value);
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171 }
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172
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173 void SendBody(const void* buffer,
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174 size_t length);
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175
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176 void SendBody(const std::string& str);
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177
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178 void SendEmptyBody();
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179
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180 void SendMethodNotAllowed(const std::string& allowed);
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181
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182 void Redirect(const std::string& path);
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183
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184 void SendUnauthorized(const std::string& realm);
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185
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186 void StartMultipart(const std::string& subType,
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187 const std::string& contentType)
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188 {
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189 stateMachine_.StartMultipart(subType, contentType);
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190 }
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191
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192 void SendMultipartItem(const std::string& item);
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193
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194 void SendMultipartItem(const void* item, size_t size)
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195 {
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196 stateMachine_.SendMultipartItem(item, size);
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197 }
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198
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199 void CloseMultipart()
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200 {
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201 stateMachine_.CloseMultipart();
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202 }
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203
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204 bool IsWritingMultipart() const
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205 {
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206 return stateMachine_.GetState() == StateMachine::State_WritingMultipart;
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207 }
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208
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209 void Answer(IHttpStreamAnswer& stream);
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210 };
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211 }