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annotate Core/HttpServer/HttpOutput.h @ 2672:3efc44fac209 jobs

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 11 Jun 2018 15:57:25 +0200
parents 878b59270859
children 9d277f8ad698
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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) 2017-2018 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 General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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33
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34 #pragma once
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35
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36 #include "../Enumerations.h"
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37 #include "IHttpOutputStream.h"
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38 #include "IHttpStreamAnswer.h"
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39
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40 #include <list>
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41 #include <string>
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42 #include <stdint.h>
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43 #include <map>
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44
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45 namespace Orthanc
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46 {
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47 class HttpOutput : public boost::noncopyable
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48 {
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49 private:
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50 typedef std::list< std::pair<std::string, std::string> > Header;
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51
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52 class StateMachine : public boost::noncopyable
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53 {
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54 public:
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55 enum State
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56 {
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57 State_WritingHeader,
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58 State_WritingBody,
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59 State_WritingMultipart,
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60 State_Done
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61 };
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62
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63 private:
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64 IHttpOutputStream& stream_;
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65 State state_;
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66
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67 HttpStatus status_;
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68 bool hasContentLength_;
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69 uint64_t contentLength_;
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70 uint64_t contentPosition_;
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71 bool keepAlive_;
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72 std::list<std::string> headers_;
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73
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74 std::string multipartBoundary_;
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75 std::string multipartContentType_;
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76
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77 public:
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78 StateMachine(IHttpOutputStream& stream,
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79 bool isKeepAlive);
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81 ~StateMachine();
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83 void SetHttpStatus(HttpStatus status);
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84
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85 void SetContentLength(uint64_t length);
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86
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87 void SetContentType(const char* contentType);
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89 void SetContentFilename(const char* filename);
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91 void SetCookie(const std::string& cookie,
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92 const std::string& value);
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94 void AddHeader(const std::string& header,
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95 const std::string& value);
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96
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97 void ClearHeaders();
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98
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99 void SendBody(const void* buffer, size_t length);
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100
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101 void StartMultipart(const std::string& subType,
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102 const std::string& contentType);
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103
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104 void SendMultipartItem(const void* item,
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105 size_t length,
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106 const std::map<std::string, std::string>& headers);
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107
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108 void CloseMultipart();
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109
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110 void CloseBody();
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111
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112 State GetState() const
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113 {
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114 return state_;
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115 }
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116 };
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117
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118 StateMachine stateMachine_;
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119 bool isDeflateAllowed_;
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120 bool isGzipAllowed_;
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121
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122 HttpCompression GetPreferredCompression(size_t bodySize) const;
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123
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124 public:
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125 HttpOutput(IHttpOutputStream& stream,
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126 bool isKeepAlive) :
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127 stateMachine_(stream, isKeepAlive),
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128 isDeflateAllowed_(false),
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129 isGzipAllowed_(false)
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130 {
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131 }
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132
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133 void SetDeflateAllowed(bool allowed)
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134 {
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135 isDeflateAllowed_ = allowed;
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136 }
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137
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138 bool IsDeflateAllowed() const
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139 {
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140 return isDeflateAllowed_;
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141 }
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142
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143 void SetGzipAllowed(bool allowed)
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144 {
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145 isGzipAllowed_ = allowed;
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146 }
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147
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148 bool IsGzipAllowed() const
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149 {
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150 return isGzipAllowed_;
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151 }
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152
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153 void SendStatus(HttpStatus status,
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154 const char* message,
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155 size_t messageSize);
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156
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157 void SendStatus(HttpStatus status)
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158 {
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159 SendStatus(status, NULL, 0);
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160 }
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161
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162 void SendStatus(HttpStatus status,
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163 const std::string& message)
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164 {
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165 SendStatus(status, message.c_str(), message.size());
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166 }
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167
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168 void SetContentType(const char* contentType)
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169 {
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170 stateMachine_.SetContentType(contentType);
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171 }
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172
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173 void SetContentFilename(const char* filename)
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174 {
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175 stateMachine_.SetContentFilename(filename);
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176 }
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177
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178 void SetCookie(const std::string& cookie,
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179 const std::string& value)
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180 {
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181 stateMachine_.SetCookie(cookie, value);
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182 }
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183
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184 void AddHeader(const std::string& key,
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185 const std::string& value)
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186 {
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187 stateMachine_.AddHeader(key, value);
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188 }
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189
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190 void Answer(const void* buffer,
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191 size_t length);
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192
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193 void Answer(const std::string& str);
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194
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195 void AnswerEmpty();
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196
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197 void SendMethodNotAllowed(const std::string& allowed);
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198
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199 void Redirect(const std::string& path);
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200
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201 void SendUnauthorized(const std::string& realm);
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202
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203 void StartMultipart(const std::string& subType,
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204 const std::string& contentType)
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205 {
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206 stateMachine_.StartMultipart(subType, contentType);
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207 }
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208
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209 void SendMultipartItem(const void* item,
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210 size_t size,
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211 const std::map<std::string, std::string>& headers)
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212 {
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213 stateMachine_.SendMultipartItem(item, size, headers);
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214 }
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215
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216 void CloseMultipart()
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217 {
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218 stateMachine_.CloseMultipart();
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219 }
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220
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221 bool IsWritingMultipart() const
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222 {
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223 return stateMachine_.GetState() == StateMachine::State_WritingMultipart;
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224 }
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225
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226 void Answer(IHttpStreamAnswer& stream);
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227 };
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228 }