annotate Core/HttpClient.cpp @ 755:584b59a80ffb Orthanc-0.7.4

set version
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 16 Apr 2014 11:42:56 +0200
parents 203157cb4fde
children a811bdf8b8eb
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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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33 #include "HttpClient.h"
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34
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35 #include "../Core/Toolbox.h"
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36 #include "../Core/OrthancException.h"
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37
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38 #include <string.h>
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39 #include <curl/curl.h>
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41
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42 namespace Orthanc
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43 {
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44 struct HttpClient::PImpl
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45 {
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46 CURL* curl_;
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47 struct curl_slist *postHeaders_;
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48 };
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51 static CURLcode CheckCode(CURLcode code)
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52 {
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53 if (code != CURLE_OK)
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54 {
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55 throw OrthancException("libCURL error: " + std::string(curl_easy_strerror(code)));
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56 }
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58 return code;
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59 }
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62 static size_t CurlCallback(void *buffer, size_t size, size_t nmemb, void *payload)
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63 {
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64 std::string& target = *(static_cast<std::string*>(payload));
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65
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66 size_t length = size * nmemb;
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67 if (length == 0)
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68 return 0;
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70 size_t pos = target.size();
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72 target.resize(pos + length);
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73 memcpy(&target.at(pos), buffer, length);
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75 return length;
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76 }
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78
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79 void HttpClient::Setup()
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80 {
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81 pimpl_->postHeaders_ = NULL;
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82 if ((pimpl_->postHeaders_ = curl_slist_append(pimpl_->postHeaders_, "Expect:")) == NULL)
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83 {
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84 throw OrthancException(ErrorCode_NotEnoughMemory);
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85 }
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86
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87 pimpl_->curl_ = curl_easy_init();
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88 if (!pimpl_->curl_)
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89 {
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90 curl_slist_free_all(pimpl_->postHeaders_);
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91 throw OrthancException(ErrorCode_NotEnoughMemory);
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92 }
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93
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94 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEFUNCTION, &CurlCallback));
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95 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HEADER, 0));
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96 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_FOLLOWLOCATION, 1));
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97
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98 #if ORTHANC_SSL_ENABLED == 1
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99 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_SSL_VERIFYPEER, 0));
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100 #endif
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101
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102 // This fixes the "longjmp causes uninitialized stack frame" crash
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103 // that happens on modern Linux versions.
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104 // http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame
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105 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOSIGNAL, 1));
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106
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107 url_ = "";
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108 method_ = HttpMethod_Get;
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109 lastStatus_ = HttpStatus_200_Ok;
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110 isVerbose_ = false;
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111 }
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112
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113
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114 HttpClient::HttpClient() : pimpl_(new PImpl)
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115 {
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116 Setup();
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117 }
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118
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119
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120 HttpClient::HttpClient(const HttpClient& other) : pimpl_(new PImpl)
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121 {
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122 Setup();
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123
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124 if (other.IsVerbose())
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125 {
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126 SetVerbose(true);
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127 }
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128
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129 if (other.credentials_.size() != 0)
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130 {
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131 credentials_ = other.credentials_;
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132 }
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133 }
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134
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135
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136 HttpClient::~HttpClient()
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137 {
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138 curl_easy_cleanup(pimpl_->curl_);
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139 curl_slist_free_all(pimpl_->postHeaders_);
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140 }
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141
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142
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143 void HttpClient::SetVerbose(bool isVerbose)
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144 {
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145 isVerbose_ = isVerbose;
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146
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147 if (isVerbose_)
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148 {
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149 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 1));
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150 }
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151 else
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152 {
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153 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_VERBOSE, 0));
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154 }
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155 }
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156
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157
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158 bool HttpClient::Apply(std::string& answer)
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159 {
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160 answer.clear();
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161 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_URL, url_.c_str()));
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162 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_WRITEDATA, &answer));
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163 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, NULL));
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164
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165 if (credentials_.size() != 0)
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166 {
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167 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_USERPWD, credentials_.c_str()));
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168 }
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169
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170 switch (method_)
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171 {
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172 case HttpMethod_Get:
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173 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPGET, 1L));
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174 break;
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175
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176 case HttpMethod_Post:
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177 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POST, 1L));
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178 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_HTTPHEADER, pimpl_->postHeaders_));
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179
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180 if (postData_.size() > 0)
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181 {
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182 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, postData_.c_str()));
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183 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, postData_.size()));
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184 }
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185 else
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186 {
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187 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDS, NULL));
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188 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_POSTFIELDSIZE, 0));
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189 }
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190
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191 break;
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192
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193 case HttpMethod_Delete:
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194 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_NOBODY, 1L));
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195 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_CUSTOMREQUEST, "DELETE"));
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196 break;
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197
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198 case HttpMethod_Put:
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199 CheckCode(curl_easy_setopt(pimpl_->curl_, CURLOPT_PUT, 1L));
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200 break;
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201
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202 default:
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203 throw OrthancException(ErrorCode_InternalError);
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204 }
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205
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206 // Do the actual request
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207 CheckCode(curl_easy_perform(pimpl_->curl_));
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208
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209 long status;
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210 CheckCode(curl_easy_getinfo(pimpl_->curl_, CURLINFO_RESPONSE_CODE, &status));
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211
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212 if (status == 0)
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213 {
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214 // This corresponds to a call to an inexistent host
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215 lastStatus_ = HttpStatus_500_InternalServerError;
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216 }
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217 else
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218 {
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219 lastStatus_ = static_cast<HttpStatus>(status);
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220 }
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221
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222 return (status >= 200 && status < 300);
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223 }
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224
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225
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226 bool HttpClient::Apply(Json::Value& answer)
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227 {
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228 std::string s;
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229 if (Apply(s))
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230 {
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231 Json::Reader reader;
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232 return reader.parse(s, answer);
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233 }
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234 else
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235 {
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236 return false;
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237 }
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238 }
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239
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240
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241 void HttpClient::SetCredentials(const char* username,
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242 const char* password)
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243 {
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244 credentials_ = std::string(username) + ":" + std::string(password);
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245 }
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246
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247
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248 void HttpClient::GlobalInitialize()
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249 {
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250 CheckCode(curl_global_init(CURL_GLOBAL_DEFAULT));
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251 }
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252
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253 void HttpClient::GlobalFinalize()
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254 {
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255 curl_global_cleanup();
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256 }
0
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257 }