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0
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1 /**
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2 * Transfers accelerator plugin for Orthanc
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3 * Copyright (C) 2018 Osimis, Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18
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19
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20 #include "HttpQueriesQueue.h"
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21
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22 #include <Core/Logging.h>
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23 #include <Core/OrthancException.h>
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24
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25 namespace OrthancPlugins
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26 {
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27 HttpQueriesQueue::Status HttpQueriesQueue::GetStatusInternal() const
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28 {
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29 if (successQueries_ == queries_.size())
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30 {
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31 return Status_Success;
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32 }
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33 else if (isFailure_)
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34 {
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35 return Status_Failure;
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36 }
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37 else
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38 {
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39 return Status_Running;
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40 }
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41 }
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42
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43
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44 HttpQueriesQueue::HttpQueriesQueue(OrthancPluginContext* context) :
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45 context_(context),
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46 peers_(context),
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47 maxRetries_(0)
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48 {
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49 Reset();
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50 }
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51
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52
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53 HttpQueriesQueue::~HttpQueriesQueue()
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54 {
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55 for (size_t i = 0; i < queries_.size(); i++)
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56 {
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57 assert(queries_[i] != NULL);
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58 delete queries_[i];
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59 }
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60 }
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61
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62
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63 unsigned int HttpQueriesQueue::GetMaxRetries()
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64 {
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65 boost::mutex::scoped_lock lock(mutex_);
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66 return maxRetries_;
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67 }
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68
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69
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70 void HttpQueriesQueue::SetMaxRetries(unsigned int maxRetries)
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71 {
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72 boost::mutex::scoped_lock lock(mutex_);
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73 maxRetries_ = maxRetries;
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74 }
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75
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76
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77 void HttpQueriesQueue::Reserve(size_t size)
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78 {
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79 boost::mutex::scoped_lock lock(mutex_);
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80 queries_.reserve(size);
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81 }
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82
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83
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84 void HttpQueriesQueue::Reset()
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85 {
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86 boost::mutex::scoped_lock lock(mutex_);
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87 position_ = 0;
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88 downloadedSize_ = 0;
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89 uploadedSize_ = 0;
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90 successQueries_ = 0;
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91 isFailure_ = false;
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92 }
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93
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94
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95 void HttpQueriesQueue::Enqueue(IHttpQuery* query)
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96 {
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97 if (query == NULL)
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98 {
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99 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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100 }
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101 else
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102 {
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103 boost::mutex::scoped_lock lock(mutex_);
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104 queries_.push_back(query);
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105 }
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106 }
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107
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108
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109 bool HttpQueriesQueue::ExecuteOneQuery(uint64_t& networkTraffic)
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110 {
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111 networkTraffic = 0;
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112
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113 unsigned int maxRetries;
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114 IHttpQuery* query = NULL;
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115
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116 {
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117 boost::mutex::scoped_lock lock(mutex_);
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118
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119 maxRetries = maxRetries_;
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120
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121 if (position_ == queries_.size() ||
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122 isFailure_)
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123 {
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124 return false;
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125 }
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126 else
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127 {
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128 query = queries_[position_];
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129 position_ ++;
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130 }
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131 }
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132
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133 std::string body;
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134
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135 if (query->GetMethod() == Orthanc::HttpMethod_Post ||
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136 query->GetMethod() == Orthanc::HttpMethod_Put)
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137 {
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138 query->ReadBody(body);
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139 }
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140
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141 unsigned int retry = 0;
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142
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143 for (;;)
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144 {
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145 MemoryBuffer answer(context_);
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146
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147 bool success;
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148
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149 try
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150 {
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151 switch (query->GetMethod())
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152 {
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153 case Orthanc::HttpMethod_Get:
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154 success = peers_.DoGet(answer, query->GetPeer(), query->GetUri());
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155 break;
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156
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157 case Orthanc::HttpMethod_Post:
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158 success = peers_.DoPost(answer, query->GetPeer(), query->GetUri(), body);
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159 break;
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160
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161 case Orthanc::HttpMethod_Put:
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162 success = peers_.DoPut(query->GetPeer(), query->GetUri(), body);
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163 break;
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164
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165 case Orthanc::HttpMethod_Delete:
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166 success = peers_.DoDelete(query->GetPeer(), query->GetUri());
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167 break;
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168
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169 default:
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170 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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171 }
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172 }
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173 catch (Orthanc::OrthancException& e)
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174 {
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175 LOG(ERROR) << "Unhandled exception during an HTTP query to peer \""
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176 << query->GetPeer() << "\": " << e.What();
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177 success = false;
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178 }
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179
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180 if (success)
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181 {
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182 size_t downloaded = 0;
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183 size_t uploaded = 0;
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184
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185 if (query->GetMethod() == Orthanc::HttpMethod_Get ||
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186 query->GetMethod() == Orthanc::HttpMethod_Post)
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187 {
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188 query->HandleAnswer(answer.GetData(), answer.GetSize());
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189 downloaded = answer.GetSize();
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190 }
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191
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192 if (query->GetMethod() == Orthanc::HttpMethod_Put ||
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193 query->GetMethod() == Orthanc::HttpMethod_Post)
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194 {
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195 uploaded = body.size();
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196 }
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197
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198 networkTraffic = downloaded + uploaded;
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199
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200 {
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201 boost::mutex::scoped_lock lock(mutex_);
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202 downloadedSize_ += downloaded;
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203 uploadedSize_ += uploaded;
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204 successQueries_ ++;
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205
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206 if (successQueries_ == queries_.size())
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207 {
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208 completed_.notify_all();
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209 }
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210
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211 return true;
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212 }
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213 }
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214 else
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215 {
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216 // Error: Let's retry
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217 retry ++;
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218
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219 if (retry < maxRetries)
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220 {
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221 // Wait 1 second before retrying
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222 boost::this_thread::sleep(boost::posix_time::seconds(1));
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223 }
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224 else
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225 {
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226 LOG(ERROR) << "Reached the maximum number of retries for a HTTP query";
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227
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228 {
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229 boost::mutex::scoped_lock lock(mutex_);
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230 isFailure_ = true;
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231 completed_.notify_all();
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232 }
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233
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234 return false;
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235 }
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236 }
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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 HttpQueriesQueue::Status HttpQueriesQueue::WaitComplete(unsigned int timeoutMS)
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242 {
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243 boost::mutex::scoped_lock lock(mutex_);
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244
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245 Status status = GetStatusInternal();
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246
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247 if (status == Status_Running)
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248 {
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249 completed_.timed_wait(lock, boost::posix_time::milliseconds(timeoutMS));
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250 return GetStatusInternal();
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251 }
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252 else
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253 {
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254 return status;
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255 }
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256 }
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257
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258
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259 void HttpQueriesQueue::WaitComplete()
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260 {
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261 boost::mutex::scoped_lock lock(mutex_);
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262
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263 while (GetStatusInternal() == Status_Running)
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264 {
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265 completed_.timed_wait(lock, boost::posix_time::milliseconds(200));
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266 }
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267 }
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268
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269
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270 void HttpQueriesQueue::GetStatistics(size_t& scheduledQueriesCount,
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271 size_t& successQueriesCount,
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272 uint64_t& downloadedSize,
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273 uint64_t& uploadedSize)
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274 {
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275 boost::mutex::scoped_lock lock(mutex_);
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276 scheduledQueriesCount = queries_.size();
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277 successQueriesCount = successQueries_;
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278 downloadedSize = downloadedSize_;
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279 uploadedSize = uploadedSize_;
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280 }
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281 }
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