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annotate Core/HttpServer/HttpOutput.cpp @ 2760:ab35523fced1 Orthanc-0.8.5

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 17 Jul 2018 09:41:40 +0200
parents 1e1390665639
children 6e7e5ed91c2d
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
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4 * 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 }
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152 }
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153
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154 if (state_ == State_WritingHeader)
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155 {
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156 // Send the HTTP header before writing the body
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157
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158 stream_.OnHttpStatusReceived(status_);
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159
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160 std::string s = "HTTP/1.1 " +
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161 boost::lexical_cast<std::string>(status_) +
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162 " " + std::string(EnumerationToString(status_)) +
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163 "\r\n";
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164
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165 if (keepAlive_)
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166 {
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167 s += "Connection: keep-alive\r\n";
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168 }
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169
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170 for (std::list<std::string>::const_iterator
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171 it = headers_.begin(); it != headers_.end(); ++it)
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172 {
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173 s += *it;
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174 }
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175
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176 if (status_ != HttpStatus_200_Ok)
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177 {
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178 hasContentLength_ = false;
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179 }
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180
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181 uint64_t contentLength = (hasContentLength_ ? contentLength_ : length);
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182 s += "Content-Length: " + boost::lexical_cast<std::string>(contentLength) + "\r\n\r\n";
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183
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184 stream_.Send(true, s.c_str(), s.size());
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185 state_ = State_WritingBody;
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186 }
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187
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188 if (hasContentLength_ &&
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189 contentPosition_ + length > contentLength_)
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190 {
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191 LOG(ERROR) << "The body size exceeds what was declared with SetContentSize()";
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192 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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193 }
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194
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195 if (length > 0)
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196 {
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197 stream_.Send(false, buffer, length);
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198 contentPosition_ += length;
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199 }
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200
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201 if (!hasContentLength_ ||
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202 contentPosition_ == contentLength_)
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203 {
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204 state_ = State_Done;
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205 }
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206 }
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207
207
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208
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209 void HttpOutput::SendMethodNotAllowed(const std::string& allowed)
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210 {
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211 stateMachine_.ClearHeaders();
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212 stateMachine_.SetHttpStatus(HttpStatus_405_MethodNotAllowed);
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213 stateMachine_.AddHeader("Allow", allowed);
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214 stateMachine_.SendBody(NULL, 0);
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215 }
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216
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217
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218 void HttpOutput::SendStatus(HttpStatus status)
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219 {
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220 if (status == HttpStatus_200_Ok ||
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221 status == HttpStatus_301_MovedPermanently ||
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222 status == HttpStatus_401_Unauthorized ||
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223 status == HttpStatus_405_MethodNotAllowed)
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224 {
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225 LOG(ERROR) << "Please use the dedicated methods to this HTTP status code in HttpOutput";
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226 throw OrthancException(ErrorCode_ParameterOutOfRange);
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227 }
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228
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229 stateMachine_.ClearHeaders();
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230 stateMachine_.SetHttpStatus(status);
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231 stateMachine_.SendBody(NULL, 0);
339
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232 }
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233
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234
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235 void HttpOutput::Redirect(const std::string& path)
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236 {
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237 stateMachine_.ClearHeaders();
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238 stateMachine_.SetHttpStatus(HttpStatus_301_MovedPermanently);
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239 stateMachine_.AddHeader("Location", path);
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240 stateMachine_.SendBody(NULL, 0);
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241 }
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242
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243
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244 void HttpOutput::SendUnauthorized(const std::string& realm)
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245 {
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246 stateMachine_.ClearHeaders();
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247 stateMachine_.SetHttpStatus(HttpStatus_401_Unauthorized);
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248 stateMachine_.AddHeader("WWW-Authenticate", "Basic realm=\"" + realm + "\"");
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249 stateMachine_.SendBody(NULL, 0);
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250 }
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251
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252 void HttpOutput::SendBody(const void* buffer, size_t length)
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253 {
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254 stateMachine_.SendBody(buffer, length);
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255 }
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256
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257 void HttpOutput::SendBody(const std::string& str)
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258 {
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259 if (str.size() == 0)
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260 {
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261 stateMachine_.SendBody(NULL, 0);
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262 }
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263 else
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264 {
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265 stateMachine_.SendBody(str.c_str(), str.size());
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266 }
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267 }
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268
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269 void HttpOutput::SendBody()
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270 {
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271 stateMachine_.SendBody(NULL, 0);
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272 }
0
3959d33612cc initial commit
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273 }