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annotate Core/FileStorage/StorageAccessor.cpp @ 1923:6ac7f31fc543

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fix freeze if empty bag of tasks
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 07 Mar 2016 08:29:22 +0100
parents b1291df2f780
children 5a8840920121
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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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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31
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32
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33 #include "../PrecompiledHeaders.h"
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34 #include "StorageAccessor.h"
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35
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36 #include "../Compression/ZlibCompressor.h"
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37 #include "../OrthancException.h"
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38 #include "../HttpServer/HttpStreamTranscoder.h"
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39
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40 namespace Orthanc
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41 {
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42 FileInfo StorageAccessor::Write(const void* data,
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43 size_t size,
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44 FileContentType type,
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45 CompressionType compression,
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46 bool storeMd5)
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47 {
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48 std::string uuid = Toolbox::GenerateUuid();
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49
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50 std::string md5;
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51
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52 if (storeMd5)
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53 {
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54 Toolbox::ComputeMD5(md5, data, size);
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55 }
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56
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57 switch (compression)
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58 {
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59 case CompressionType_None:
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60 {
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61 area_.Create(uuid, data, size, type);
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62 return FileInfo(uuid, type, size, md5);
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63 }
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64
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65 case CompressionType_ZlibWithSize:
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66 {
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67 ZlibCompressor zlib;
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68
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69 std::string compressed;
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70 zlib.Compress(compressed, data, size);
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71
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72 std::string compressedMD5;
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73
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74 if (storeMd5)
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75 {
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76 Toolbox::ComputeMD5(compressedMD5, compressed);
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77 }
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78
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79 if (compressed.size() > 0)
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80 {
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81 area_.Create(uuid, &compressed[0], compressed.size(), type);
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82 }
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83 else
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84 {
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85 area_.Create(uuid, NULL, 0, type);
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86 }
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87
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88 return FileInfo(uuid, type, size, md5,
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89 CompressionType_ZlibWithSize, compressed.size(), compressedMD5);
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90 }
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91
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92 default:
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93 throw OrthancException(ErrorCode_NotImplemented);
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94 }
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95 }
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96
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97
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98 void StorageAccessor::Read(std::string& content,
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99 const FileInfo& info)
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100 {
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101 switch (info.GetCompressionType())
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102 {
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103 case CompressionType_None:
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104 {
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105 area_.Read(content, info.GetUuid(), info.GetContentType());
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106 break;
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107 }
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108
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109 case CompressionType_ZlibWithSize:
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110 {
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111 ZlibCompressor zlib;
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112
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113 std::string compressed;
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114 area_.Read(compressed, info.GetUuid(), info.GetContentType());
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115 IBufferCompressor::Uncompress(content, zlib, compressed);
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116 break;
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117 }
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118
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119 default:
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120 {
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121 throw OrthancException(ErrorCode_NotImplemented);
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122 }
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123 }
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124
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125 // TODO Check the validity of the uncompressed MD5?
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126 }
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127
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128
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129 void StorageAccessor::Read(Json::Value& content,
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130 const FileInfo& info)
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131 {
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132 std::string s;
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133 Read(s, info);
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134
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135 Json::Reader reader;
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136 if (!reader.parse(s, content))
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137 {
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138 throw OrthancException(ErrorCode_BadFileFormat);
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139 }
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140 }
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141
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142
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143 void StorageAccessor::SetupSender(BufferHttpSender& sender,
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144 const FileInfo& info,
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145 const std::string& mime)
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146 {
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147 area_.Read(sender.GetBuffer(), info.GetUuid(), info.GetContentType());
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148 sender.SetContentType(mime);
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149
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150 const char* extension;
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151 switch (info.GetContentType())
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152 {
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153 case FileContentType_Dicom:
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154 extension = ".dcm";
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155 break;
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156
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157 case FileContentType_DicomAsJson:
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158 extension = ".json";
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159 break;
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160
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161 default:
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162 // Non-standard content type
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163 extension = "";
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164 }
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165
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166 sender.SetContentFilename(info.GetUuid() + std::string(extension));
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167 }
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168
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169
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170 void StorageAccessor::AnswerFile(HttpOutput& output,
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171 const FileInfo& info,
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172 const std::string& mime)
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173 {
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174 BufferHttpSender sender;
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175 SetupSender(sender, info, mime);
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176
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177 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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178 output.Answer(transcoder);
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179 }
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180
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181
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182 void StorageAccessor::AnswerFile(RestApiOutput& output,
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183 const FileInfo& info,
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184 const std::string& mime)
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185 {
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186 BufferHttpSender sender;
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187 SetupSender(sender, info, mime);
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188
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189 HttpStreamTranscoder transcoder(sender, info.GetCompressionType());
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190 output.AnswerStream(transcoder);
221
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191 }
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192 }