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annotate Core/HttpServer/HttpOutput.h @ 2235:99d151fafab9

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 16 Dec 2016 14:35:52 +0100
parents 5a8840920121
children a3a65de1840f
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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 *
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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 "../Enumerations.h"
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36 #include "IHttpOutputStream.h"
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37 #include "IHttpStreamAnswer.h"
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38
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39 #include <list>
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40 #include <string>
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41 #include <stdint.h>
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42 #include <map>
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43
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44 namespace Orthanc
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45 {
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46 class HttpOutput : public boost::noncopyable
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47 {
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48 private:
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49 typedef std::list< std::pair<std::string, std::string> > Header;
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50
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51 class StateMachine : public boost::noncopyable
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52 {
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53 public:
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54 enum State
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55 {
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56 State_WritingHeader,
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57 State_WritingBody,
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58 State_WritingMultipart,
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59 State_Done
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60 };
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61
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62 private:
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63 IHttpOutputStream& stream_;
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64 State state_;
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65
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66 HttpStatus status_;
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67 bool hasContentLength_;
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68 uint64_t contentLength_;
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69 uint64_t contentPosition_;
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70 bool keepAlive_;
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71 std::list<std::string> headers_;
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72
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73 std::string multipartBoundary_;
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74 std::string multipartContentType_;
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75
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76 public:
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77 StateMachine(IHttpOutputStream& stream,
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78 bool isKeepAlive);
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80 ~StateMachine();
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81
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82 void SetHttpStatus(HttpStatus status);
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83
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84 void SetContentLength(uint64_t length);
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85
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86 void SetContentType(const char* contentType);
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88 void SetContentFilename(const char* filename);
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89
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90 void SetCookie(const std::string& cookie,
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91 const std::string& value);
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93 void AddHeader(const std::string& header,
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94 const std::string& value);
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96 void ClearHeaders();
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98 void SendBody(const void* buffer, size_t length);
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99
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100 void StartMultipart(const std::string& subType,
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101 const std::string& contentType);
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102
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103 void SendMultipartItem(const void* item,
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104 size_t length,
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105 const std::map<std::string, std::string>& headers);
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106
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107 void CloseMultipart();
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108
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109 void CloseBody();
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110
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111 State GetState() const
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112 {
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113 return state_;
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114 }
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115 };
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116
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117 StateMachine stateMachine_;
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118 bool isDeflateAllowed_;
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119 bool isGzipAllowed_;
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120
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121 HttpCompression GetPreferredCompression(size_t bodySize) const;
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122
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123 public:
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124 HttpOutput(IHttpOutputStream& stream,
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125 bool isKeepAlive) :
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126 stateMachine_(stream, isKeepAlive),
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127 isDeflateAllowed_(false),
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128 isGzipAllowed_(false)
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129 {
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130 }
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131
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132 void SetDeflateAllowed(bool allowed)
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133 {
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134 isDeflateAllowed_ = allowed;
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135 }
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136
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137 bool IsDeflateAllowed() const
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138 {
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139 return isDeflateAllowed_;
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140 }
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141
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142 void SetGzipAllowed(bool allowed)
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143 {
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144 isGzipAllowed_ = allowed;
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145 }
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146
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147 bool IsGzipAllowed() const
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148 {
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149 return isGzipAllowed_;
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150 }
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151
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152 void SendStatus(HttpStatus status,
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153 const char* message,
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154 size_t messageSize);
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155
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156 void SendStatus(HttpStatus status)
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157 {
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158 SendStatus(status, NULL, 0);
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159 }
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160
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161 void SendStatus(HttpStatus status,
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162 const std::string& message)
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163 {
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164 SendStatus(status, message.c_str(), message.size());
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165 }
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166
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167 void SetContentType(const char* contentType)
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168 {
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169 stateMachine_.SetContentType(contentType);
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170 }
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171
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172 void SetContentFilename(const char* filename)
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173 {
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174 stateMachine_.SetContentFilename(filename);
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175 }
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176
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177 void SetCookie(const std::string& cookie,
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178 const std::string& value)
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179 {
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180 stateMachine_.SetCookie(cookie, value);
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181 }
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182
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183 void AddHeader(const std::string& key,
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184 const std::string& value)
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185 {
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186 stateMachine_.AddHeader(key, value);
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187 }
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188
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189 void Answer(const void* buffer,
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190 size_t length);
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191
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192 void Answer(const std::string& str);
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193
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194 void AnswerEmpty();
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195
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196 void SendMethodNotAllowed(const std::string& allowed);
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197
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198 void Redirect(const std::string& path);
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199
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200 void SendUnauthorized(const std::string& realm);
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201
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202 void StartMultipart(const std::string& subType,
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203 const std::string& contentType)
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204 {
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205 stateMachine_.StartMultipart(subType, contentType);
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206 }
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207
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208 void SendMultipartItem(const void* item,
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209 size_t size,
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210 const std::map<std::string, std::string>& headers)
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211 {
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212 stateMachine_.SendMultipartItem(item, size, headers);
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213 }
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214
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215 void CloseMultipart()
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216 {
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217 stateMachine_.CloseMultipart();
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218 }
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219
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220 bool IsWritingMultipart() const
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221 {
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222 return stateMachine_.GetState() == StateMachine::State_WritingMultipart;
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223 }
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224
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225 void Answer(IHttpStreamAnswer& stream);
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226 };
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227 }