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annotate Core/HttpServer/HttpOutput.cpp @ 1480:f176ec4467e6

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fix warning
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sun, 02 Aug 2015 12:23:09 +0200
parents ad94a3583b07
children f967bdf8534e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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32
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33 #include "../PrecompiledHeaders.h"
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34 #include "HttpOutput.h"
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35
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36 #include <iostream>
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37 #include <vector>
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38 #include <stdio.h>
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39 #include <glog/logging.h>
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40 #include <boost/lexical_cast.hpp>
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41 #include "../OrthancException.h"
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42 #include "../Toolbox.h"
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43
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44 namespace Orthanc
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45 {
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46 HttpOutput::StateMachine::StateMachine(IHttpOutputStream& stream,
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47 bool isKeepAlive) :
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48 stream_(stream),
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49 state_(State_WritingHeader),
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50 status_(HttpStatus_200_Ok),
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51 hasContentLength_(false),
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52 contentPosition_(0),
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53 keepAlive_(isKeepAlive)
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54 {
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55 }
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56
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57 HttpOutput::StateMachine::~StateMachine()
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58 {
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59 if (state_ != State_Done)
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60 {
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61 //asm volatile ("int3;");
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62 //LOG(ERROR) << "This HTTP answer does not contain any body";
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63 }
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64
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65 if (hasContentLength_ && contentPosition_ != contentLength_)
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66 {
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67 LOG(ERROR) << "This HTTP answer has not sent the proper number of bytes in its body";
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68 }
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69 }
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72 void HttpOutput::StateMachine::SetHttpStatus(HttpStatus status)
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73 {
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74 if (state_ != State_WritingHeader)
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75 {
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76 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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77 }
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78
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79 status_ = status;
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80 }
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83 void HttpOutput::StateMachine::SetContentLength(uint64_t length)
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84 {
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85 if (state_ != State_WritingHeader)
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86 {
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87 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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88 }
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89
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90 hasContentLength_ = true;
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91 contentLength_ = length;
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92 }
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93
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94 void HttpOutput::StateMachine::SetContentType(const char* contentType)
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95 {
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96 AddHeader("Content-Type", contentType);
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97 }
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99 void HttpOutput::StateMachine::SetContentFilename(const char* filename)
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100 {
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101 // TODO Escape double quotes
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102 AddHeader("Content-Disposition", "filename=\"" + std::string(filename) + "\"");
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103 }
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104
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105 void HttpOutput::StateMachine::SetCookie(const std::string& cookie,
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106 const std::string& value)
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107 {
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108 if (state_ != State_WritingHeader)
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109 {
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110 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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111 }
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112
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113 // TODO Escape "=" characters
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114 AddHeader("Set-Cookie", cookie + "=" + value);
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115 }
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118 void HttpOutput::StateMachine::AddHeader(const std::string& header,
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119 const std::string& value)
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120 {
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121 if (state_ != State_WritingHeader)
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122 {
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123 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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124 }
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126 headers_.push_back(header + ": " + value + "\r\n");
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127 }
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128
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129 void HttpOutput::StateMachine::ClearHeaders()
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130 {
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131 if (state_ != State_WritingHeader)
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132 {
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133 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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134 }
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135
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136 headers_.clear();
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137 }
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138
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139 void HttpOutput::StateMachine::SendBody(const void* buffer, size_t length)
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140 {
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141 if (state_ == State_Done)
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142 {
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143 if (length == 0)
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144 {
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145 return;
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146 }
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147 else
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148 {
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149 LOG(ERROR) << "Because of keep-alive connections, the entire body must be sent at once or Content-Length must be given";
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150 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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151 }
910
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152 }
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153
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154 if (state_ == State_WritingMultipart)
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155 {
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156 throw OrthancException(ErrorCode_InternalError);
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157 }
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158
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159 if (state_ == State_WritingHeader)
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160 {
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161 // Send the HTTP header before writing the body
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162
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163 stream_.OnHttpStatusReceived(status_);
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164
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165 std::string s = "HTTP/1.1 " +
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166 boost::lexical_cast<std::string>(status_) +
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167 " " + std::string(EnumerationToString(status_)) +
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168 "\r\n";
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169
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170 if (keepAlive_)
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171 {
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172 s += "Connection: keep-alive\r\n";
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173 }
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174
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175 for (std::list<std::string>::const_iterator
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176 it = headers_.begin(); it != headers_.end(); ++it)
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177 {
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178 s += *it;
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179 }
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180
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181 if (status_ != HttpStatus_200_Ok)
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182 {
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183 hasContentLength_ = false;
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184 }
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185
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186 uint64_t contentLength = (hasContentLength_ ? contentLength_ : length);
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187 s += "Content-Length: " + boost::lexical_cast<std::string>(contentLength) + "\r\n\r\n";
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188
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189 stream_.Send(true, s.c_str(), s.size());
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190 state_ = State_WritingBody;
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191 }
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192
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193 if (hasContentLength_ &&
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194 contentPosition_ + length > contentLength_)
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195 {
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196 LOG(ERROR) << "The body size exceeds what was declared with SetContentSize()";
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197 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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198 }
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199
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200 if (length > 0)
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201 {
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202 stream_.Send(false, buffer, length);
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203 contentPosition_ += length;
330
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204 }
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205
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206 if (!hasContentLength_ ||
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207 contentPosition_ == contentLength_)
330
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208 {
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209 state_ = State_Done;
330
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210 }
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211 }
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212
207
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213
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214 void HttpOutput::SendMethodNotAllowed(const std::string& allowed)
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215 {
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216 stateMachine_.ClearHeaders();
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217 stateMachine_.SetHttpStatus(HttpStatus_405_MethodNotAllowed);
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218 stateMachine_.AddHeader("Allow", allowed);
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219 stateMachine_.SendBody(NULL, 0);
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220 }
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221
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222
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223 void HttpOutput::SendStatus(HttpStatus status)
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224 {
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225 if (status == HttpStatus_200_Ok ||
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226 status == HttpStatus_301_MovedPermanently ||
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227 status == HttpStatus_401_Unauthorized ||
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228 status == HttpStatus_405_MethodNotAllowed)
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229 {
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230 LOG(ERROR) << "Please use the dedicated methods to this HTTP status code in HttpOutput";
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231 throw OrthancException(ErrorCode_ParameterOutOfRange);
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232 }
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233
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234 stateMachine_.ClearHeaders();
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235 stateMachine_.SetHttpStatus(status);
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236 stateMachine_.SendBody(NULL, 0);
339
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237 }
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238
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239
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240 void HttpOutput::Redirect(const std::string& path)
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241 {
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242 stateMachine_.ClearHeaders();
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243 stateMachine_.SetHttpStatus(HttpStatus_301_MovedPermanently);
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244 stateMachine_.AddHeader("Location", path);
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245 stateMachine_.SendBody(NULL, 0);
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246 }
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247
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248
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249 void HttpOutput::SendUnauthorized(const std::string& realm)
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250 {
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251 stateMachine_.ClearHeaders();
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252 stateMachine_.SetHttpStatus(HttpStatus_401_Unauthorized);
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253 stateMachine_.AddHeader("WWW-Authenticate", "Basic realm=\"" + realm + "\"");
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254 stateMachine_.SendBody(NULL, 0);
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255 }
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256
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257 void HttpOutput::SendBody(const void* buffer, size_t length)
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258 {
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259 stateMachine_.SendBody(buffer, length);
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260 }
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261
1113
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262 void HttpOutput::SendBody(const std::string& str)
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263 {
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264 if (str.size() == 0)
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265 {
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266 stateMachine_.SendBody(NULL, 0);
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267 }
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268 else
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269 {
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270 stateMachine_.SendBody(str.c_str(), str.size());
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271 }
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272 }
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273
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274 void HttpOutput::SendBody()
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275 {
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276 stateMachine_.SendBody(NULL, 0);
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277 }
1430
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278
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279
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280 void HttpOutput::StateMachine::StartMultipart(const std::string& subType,
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281 const std::string& contentType)
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282 {
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283 if (subType != "mixed" &&
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284 subType != "related")
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285 {
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286 throw OrthancException(ErrorCode_ParameterOutOfRange);
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287 }
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288
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289 if (keepAlive_)
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290 {
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291 LOG(ERROR) << "Multipart answers are not implemented together with keep-alive connections";
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292 throw OrthancException(ErrorCode_NotImplemented);
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293 }
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294
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295 if (state_ != State_WritingHeader)
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296 {
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297 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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298 }
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299
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300 if (status_ != HttpStatus_200_Ok)
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301 {
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302 SendBody(NULL, 0);
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303 return;
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304 }
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305
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306 stream_.OnHttpStatusReceived(status_);
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307
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308 std::string header = "HTTP/1.1 200 OK\r\n";
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309
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310 // Possibly add the cookies
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311 for (std::list<std::string>::const_iterator
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312 it = headers_.begin(); it != headers_.end(); ++it)
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313 {
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314 if (!Toolbox::StartsWith(*it, "Set-Cookie: "))
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315 {
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316 LOG(ERROR) << "The only headers that can be set in multipart answers are Set-Cookie (here: " << *it << " is set)";
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317 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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318 }
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319
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320 header += *it;
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321 }
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322
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323 multipartBoundary_ = Toolbox::GenerateUuid();
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324 multipartContentType_ = contentType;
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325 header += "Content-Type: multipart/related; type=multipart/" + subType + "; boundary=" + multipartBoundary_ + "\r\n\r\n";
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326
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327 stream_.Send(true, header.c_str(), header.size());
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328 state_ = State_WritingMultipart;
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329 }
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330
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331
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332 void HttpOutput::StateMachine::SendMultipartItem(const void* item, size_t length)
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333 {
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334 std::string header = "--" + multipartBoundary_ + "\n";
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335 header += "Content-Type: " + multipartContentType_ + "\n";
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336 header += "Content-Length: " + boost::lexical_cast<std::string>(length) + "\n";
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337 header += "MIME-Version: 1.0\n\n";
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338
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339 stream_.Send(false, header.c_str(), header.size());
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340
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341 if (length > 0)
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342 {
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343 stream_.Send(false, item, length);
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344 }
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345
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346 stream_.Send(false, "\n", 1);
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347 }
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348
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349
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350 void HttpOutput::StateMachine::CloseMultipart()
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351 {
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352 if (state_ != State_WritingMultipart)
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353 {
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354 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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355 }
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356
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357 // The two lines below might throw an exception, if the client has
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358 // closed the connection. Such an error is ignored.
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359 try
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360 {
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361 std::string header = "--" + multipartBoundary_ + "--\n";
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362 stream_.Send(false, header.c_str(), header.size());
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363 }
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364 catch (OrthancException&)
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365 {
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366 }
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367
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368 state_ = State_Done;
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369 }
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370
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371
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372 void HttpOutput::SendMultipartItem(const std::string& item)
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373 {
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374 if (item.size() > 0)
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375 {
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376 stateMachine_.SendMultipartItem(item.c_str(), item.size());
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377 }
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378 else
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379 {
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380 stateMachine_.SendMultipartItem(NULL, 0);
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381 }
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382 }
0
3959d33612cc initial commit
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383 }