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annotate OrthancServer/Internals/FindScp.cpp @ 2252:002b94046c69

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 20 Jan 2017 13:14:30 +0100
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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 * Copyright (C) 2017 Osimis, Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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35 /*=========================================================================
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36
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37 This file is based on portions of the following project:
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38
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39 Program: DCMTK 3.6.0
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40 Module: http://dicom.offis.de/dcmtk.php.en
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42 Copyright (C) 1994-2011, OFFIS e.V.
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43 All rights reserved.
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45 This software and supporting documentation were developed by
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47 OFFIS e.V.
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48 R&D Division Health
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49 Escherweg 2
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50 26121 Oldenburg, Germany
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52 Redistribution and use in source and binary forms, with or without
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53 modification, are permitted provided that the following conditions
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54 are met:
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55
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56 - Redistributions of source code must retain the above copyright
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57 notice, this list of conditions and the following disclaimer.
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59 - Redistributions in binary form must reproduce the above copyright
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60 notice, this list of conditions and the following disclaimer in the
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61 documentation and/or other materials provided with the distribution.
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63 - Neither the name of OFFIS nor the names of its contributors may be
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64 used to endorse or promote products derived from this software
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65 without specific prior written permission.
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67 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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68 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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69 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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70 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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71 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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72 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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73 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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74 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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75 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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76 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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77 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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79 =========================================================================*/
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82
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83 #include "../PrecompiledHeadersServer.h"
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84 #include "FindScp.h"
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86 #include "../FromDcmtkBridge.h"
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87 #include "../ToDcmtkBridge.h"
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88 #include "../../Core/Logging.h"
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89 #include "../../Core/OrthancException.h"
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90 #include "../OrthancInitialization.h"
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91
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92 #include <dcmtk/dcmdata/dcfilefo.h>
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93 #include <dcmtk/dcmdata/dcdeftag.h>
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97 /**
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98 * The function below is extracted from DCMTK 3.6.0, cf. file
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99 * "dcmtk-3.6.0/dcmwlm/libsrc/wldsfs.cc".
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100 **/
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101
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102 static void HandleExistentButEmptyReferencedStudyOrPatientSequenceAttributes(DcmDataset *dataset,
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103 const DcmTagKey &sequenceTagKey)
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104 // Date : May 3, 2005
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105 // Author : Thomas Wilkens
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106 // Task : This function performs a check on a sequence attribute in the given dataset. At two different places
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107 // in the definition of the DICOM worklist management service, a sequence attribute with a return type
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108 // of 2 is mentioned containing two 1C attributes in its item; the condition of the two 1C attributes
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109 // specifies that in case a sequence item is present, then these two attributes must be existent and
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110 // must contain a value. (I am talking about ReferencedStudySequence and ReferencedPatientSequence.)
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111 // In cases where the sequence attribute contains exactly one item with an empty ReferencedSOPClass
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112 // and an empty ReferencedSOPInstance, we want to remove the item from the sequence. This is what
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113 // this function does.
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114 // Parameters : dataset - [in] Dataset in which the consistency of the sequence attribute shall be checked.
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115 // sequenceTagKey - [in] DcmTagKey of the sequence attribute which shall be checked.
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116 // Return Value : none.
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117 {
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118 DcmElement *sequenceAttribute = NULL, *referencedSOPClassUIDAttribute = NULL, *referencedSOPInstanceUIDAttribute = NULL;
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119
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120 // in case the sequence attribute contains exactly one item with an empty
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121 // ReferencedSOPClassUID and an empty ReferencedSOPInstanceUID, remove the item
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122 if( dataset->findAndGetElement( sequenceTagKey, sequenceAttribute ).good() &&
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123 ( (DcmSequenceOfItems*)sequenceAttribute )->card() == 1 &&
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124 ( (DcmSequenceOfItems*)sequenceAttribute )->getItem(0)->findAndGetElement( DCM_ReferencedSOPClassUID, referencedSOPClassUIDAttribute ).good() &&
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125 referencedSOPClassUIDAttribute->getLength() == 0 &&
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126 ( (DcmSequenceOfItems*)sequenceAttribute )->getItem(0)->findAndGetElement( DCM_ReferencedSOPInstanceUID, referencedSOPInstanceUIDAttribute, OFFalse ).good() &&
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127 referencedSOPInstanceUIDAttribute->getLength() == 0 )
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128 {
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129 DcmItem *item = ((DcmSequenceOfItems*)sequenceAttribute)->remove( ((DcmSequenceOfItems*)sequenceAttribute)->getItem(0) );
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130 delete item;
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131 }
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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 namespace Orthanc
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137 {
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138 namespace
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139 {
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140 struct FindScpData
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141 {
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142 IFindRequestHandler* findHandler_;
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143 IWorklistRequestHandler* worklistHandler_;
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144 DicomFindAnswers answers_;
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145 DcmDataset* lastRequest_;
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146 const std::string* remoteIp_;
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147 const std::string* remoteAet_;
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148 const std::string* calledAet_;
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149
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150 FindScpData() : answers_(false)
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151 {
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152 }
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153 };
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154
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155
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156
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157 static void FixWorklistQuery(ParsedDicomFile& query)
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158 {
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159 // TODO: Check out
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160 // WlmDataSourceFileSystem::HandleExistentButEmptyDescriptionAndCodeSequenceAttributes()"
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161 // in DCMTK 3.6.0
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162
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163 DcmDataset* dataset = query.GetDcmtkObject().getDataset();
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164 HandleExistentButEmptyReferencedStudyOrPatientSequenceAttributes(dataset, DCM_ReferencedStudySequence);
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165 HandleExistentButEmptyReferencedStudyOrPatientSequenceAttributes(dataset, DCM_ReferencedPatientSequence);
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166 }
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167
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168
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169
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170 void FindScpCallback(
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171 /* in */
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172 void *callbackData,
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173 OFBool cancelled,
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174 T_DIMSE_C_FindRQ *request,
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175 DcmDataset *requestIdentifiers,
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176 int responseCount,
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177 /* out */
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178 T_DIMSE_C_FindRSP *response,
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179 DcmDataset **responseIdentifiers,
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180 DcmDataset **statusDetail)
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181 {
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182 bzero(response, sizeof(T_DIMSE_C_FindRSP));
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183 *statusDetail = NULL;
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184
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185 std::string sopClassUid(request->AffectedSOPClassUID);
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186
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187 FindScpData& data = *reinterpret_cast<FindScpData*>(callbackData);
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188 if (data.lastRequest_ == NULL)
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189 {
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190 bool ok = false;
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191
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192 try
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193 {
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194 if (sopClassUid == UID_FINDModalityWorklistInformationModel)
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195 {
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196 data.answers_.SetWorklist(true);
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197
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198 if (data.worklistHandler_ != NULL)
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199 {
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200 ParsedDicomFile query(*requestIdentifiers);
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201 FixWorklistQuery(query);
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202
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203 data.worklistHandler_->Handle(data.answers_, query,
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204 *data.remoteIp_, *data.remoteAet_,
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205 *data.calledAet_);
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206 ok = true;
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207 }
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208 else
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209 {
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210 LOG(ERROR) << "No worklist handler is installed, cannot handle this C-FIND request";
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211 }
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212 }
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213 else
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214 {
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215 data.answers_.SetWorklist(false);
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216
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217 if (data.findHandler_ != NULL)
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218 {
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219 std::list<DicomTag> sequencesToReturn;
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220
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221 for (unsigned long i = 0; i < requestIdentifiers->card(); i++)
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222 {
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223 DcmElement* element = requestIdentifiers->getElement(i);
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224 if (element && !element->isLeaf())
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225 {
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226 const DicomTag tag(FromDcmtkBridge::Convert(element->getTag()));
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227
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228 DcmSequenceOfItems& sequence = dynamic_cast<DcmSequenceOfItems&>(*element);
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229 if (sequence.card() != 0)
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230 {
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231 LOG(WARNING) << "Orthanc only supports sequence matching on worklists, "
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232 << "ignoring C-FIND SCU constraint on tag (" << tag.Format()
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233 << ") " << FromDcmtkBridge::GetTagName(*element);
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234 }
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235
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236 sequencesToReturn.push_back(tag);
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237 }
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238 }
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239
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240 DicomMap input;
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241 Configuration::ExtractDicomSummary(input, *requestIdentifiers);
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242
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243 data.findHandler_->Handle(data.answers_, input, sequencesToReturn,
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244 *data.remoteIp_, *data.remoteAet_,
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245 *data.calledAet_);
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246 ok = true;
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247 }
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248 else
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249 {
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250 LOG(ERROR) << "No C-Find handler is installed, cannot handle this request";
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251 }
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252 }
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253 }
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254 catch (OrthancException& e)
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255 {
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256 // Internal error!
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257 LOG(ERROR) << "C-FIND request handler has failed: " << e.What();
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258 }
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259
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260 if (!ok)
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261 {
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262 response->DimseStatus = STATUS_FIND_Failed_UnableToProcess;
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263 *responseIdentifiers = NULL;
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264 return;
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265 }
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266
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267 data.lastRequest_ = requestIdentifiers;
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268 }
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269 else if (data.lastRequest_ != requestIdentifiers)
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270 {
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271 // Internal error!
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272 response->DimseStatus = STATUS_FIND_Failed_UnableToProcess;
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273 *responseIdentifiers = NULL;
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274 return;
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275 }
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276
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277 if (responseCount <= static_cast<int>(data.answers_.GetSize()))
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278 {
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279 // There are pending results that are still to be sent
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280 response->DimseStatus = STATUS_Pending;
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281 *responseIdentifiers = data.answers_.ExtractDcmDataset(responseCount - 1);
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282 }
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283 else if (data.answers_.IsComplete())
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284 {
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285 // Success: All the results have been sent
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286 response->DimseStatus = STATUS_Success;
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287 *responseIdentifiers = NULL;
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288 }
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289 else
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290 {
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291 // Success, but the results were too numerous and had to be cropped
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292 LOG(WARNING) << "Too many results for an incoming C-FIND query";
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293 response->DimseStatus = STATUS_FIND_Cancel_MatchingTerminatedDueToCancelRequest;
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294 *responseIdentifiers = NULL;
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295 }
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296 }
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297 }
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298
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299
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300 OFCondition Internals::findScp(T_ASC_Association * assoc,
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301 T_DIMSE_Message * msg,
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302 T_ASC_PresentationContextID presID,
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303 IFindRequestHandler* findHandler,
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304 IWorklistRequestHandler* worklistHandler,
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305 const std::string& remoteIp,
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306 const std::string& remoteAet,
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307 const std::string& calledAet)
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308 {
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309 FindScpData data;
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310 data.lastRequest_ = NULL;
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311 data.findHandler_ = findHandler;
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312 data.worklistHandler_ = worklistHandler;
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313 data.remoteIp_ = &remoteIp;
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314 data.remoteAet_ = &remoteAet;
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315 data.calledAet_ = &calledAet;
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316
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317 OFCondition cond = DIMSE_findProvider(assoc, presID, &msg->msg.CFindRQ,
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318 FindScpCallback, &data,
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319 /*opt_blockMode*/ DIMSE_BLOCKING,
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320 /*opt_dimse_timeout*/ 0);
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321
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322 // if some error occured, dump corresponding information and remove the outfile if necessary
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323 if (cond.bad())
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324 {
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325 OFString temp_str;
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326 LOG(ERROR) << "Find SCP Failed: " << cond.text();
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327 }
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328
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329 return cond;
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330 }
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331 }