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annotate OrthancFramework/Sources/HttpServer/IWebDavBucket.cpp @ 4232:688435755466

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added DELETE in WebDAV, first working virtual filesystem
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 07 Oct 2020 13:00:57 +0200
parents b313a0001893
children a38376b80cd1
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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) 2017-2020 Osimis S.A., 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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "../PrecompiledHeaders.h"
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24 #include "IWebDavBucket.h"
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25
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26 #include "HttpOutput.h"
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27 #include "../OrthancException.h"
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28 #include "../Toolbox.h"
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29
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30
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31 static boost::posix_time::ptime GetNow()
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32 {
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33 return boost::posix_time::second_clock::universal_time();
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34 }
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35
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36
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37 static std::string AddTrailingSlash(const std::string& s)
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38 {
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39 if (s.empty() ||
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40 s[s.size() - 1] != '/')
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41 {
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42 return s + '/';
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43 }
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44 else
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45 {
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46 return s;
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47 }
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48 }
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49
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50
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51 namespace Orthanc
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52 {
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53 void IWebDavBucket::Resource::SetNameInternal(const std::string& name)
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54 {
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55 if (name.find('/') != std::string::npos ||
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56 name.find('\\') != std::string::npos ||
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57 name.find('\0') != std::string::npos)
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58 {
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59 throw OrthancException(ErrorCode_ParameterOutOfRange,
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60 "Bad resource name for WebDAV: " + name);
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61 }
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62
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63 name_ = name;
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64 }
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65
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66
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67 IWebDavBucket::Resource::Resource() :
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68 hasModificationTime_(false),
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69 creationTime_(GetNow()),
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70 modificationTime_(GetNow())
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71 {
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72 }
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73
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74
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75 void IWebDavBucket::Resource::SetCreationTime(const boost::posix_time::ptime& t)
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76 {
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77 creationTime_ = t;
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78
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79 if (!hasModificationTime_)
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80 {
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81 modificationTime_ = t;
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82 }
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83 }
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84
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85
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86 void IWebDavBucket::Resource::SetModificationTime(const boost::posix_time::ptime& t)
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87 {
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88 modificationTime_ = t;
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89 hasModificationTime_ = true;
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90 }
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91
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92
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93 void IWebDavBucket::Resource::Format(pugi::xml_node& node,
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94 const std::string& parentPath,
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95 bool includeDisplayName) const
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96 {
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97 node.set_name("D:response");
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98
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99 std::string s = AddTrailingSlash(parentPath) + GetName();
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100 node.append_child("D:href").append_child(pugi::node_pcdata).set_value(s.c_str());
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101
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102 pugi::xml_node propstat = node.append_child("D:propstat");
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103
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104 static const HttpStatus status = HttpStatus_200_Ok;
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105 s = ("HTTP/1.1 " + boost::lexical_cast<std::string>(status) + " " +
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106 std::string(EnumerationToString(status)));
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107 propstat.append_child("D:status").append_child(pugi::node_pcdata).set_value(s.c_str());
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108
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109 pugi::xml_node prop = propstat.append_child("D:prop");
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110
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111 // IMPORTANT: The "Z" suffix is mandatory on Windows >= 7 (it indicates UTC)
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112 s = boost::posix_time::to_iso_extended_string(GetCreationTime()) + "Z";
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113 prop.append_child("D:creationdate").append_child(pugi::node_pcdata).set_value(s.c_str());
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114
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115 s = boost::posix_time::to_iso_extended_string(GetModificationTime()) + "Z";
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116 prop.append_child("D:getlastmodified").append_child(pugi::node_pcdata).set_value(s.c_str());
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117
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118 #if 0
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119 // Maybe used by davfs2
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120 prop.append_child("D:quota-available-bytes");
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121 prop.append_child("D:quota-used-bytes");
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122 #endif
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123
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124 #if 0
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125 prop.append_child("D:lockdiscovery");
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126 pugi::xml_node lock = prop.append_child("D:supportedlock");
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127
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128 pugi::xml_node lockentry = lock.append_child("D:lockentry");
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129 lockentry.append_child("D:lockscope").append_child("D:exclusive");
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130 lockentry.append_child("D:locktype").append_child("D:write");
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131
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132 lockentry = lock.append_child("D:lockentry");
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133 lockentry.append_child("D:lockscope").append_child("D:shared");
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134 lockentry.append_child("D:locktype").append_child("D:write");
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135 #endif
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136 }
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137
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138
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139 IWebDavBucket::File::File(const std::string& name) :
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140 contentLength_(0),
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141 mime_(MimeType_Binary)
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142 {
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143 if (name.empty())
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144 {
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145 throw OrthancException(ErrorCode_ParameterOutOfRange,
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146 "Cannot use an empty filename in WebDAV");
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147 }
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148
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149 SetNameInternal(name);
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150 }
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151
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152
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153 void IWebDavBucket::File::Format(pugi::xml_node& node,
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154 const std::string& parentPath,
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155 bool includeDisplayName) const
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156 {
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157 Resource::Format(node, parentPath, includeDisplayName);
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158
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159 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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160 prop.append_child("D:resourcetype");
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161
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162 std::string s = boost::lexical_cast<std::string>(contentLength_);
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163 prop.append_child("D:getcontentlength").append_child(pugi::node_pcdata).set_value(s.c_str());
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164
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165 s = EnumerationToString(mime_);
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166 prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value(s.c_str());
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167
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168 prop.append_child("D:displayname").append_child(pugi::node_pcdata).set_value(GetName().c_str());
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169 }
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170
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171
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172 void IWebDavBucket::Folder::Format(pugi::xml_node& node,
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173 const std::string& parentPath,
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174 bool includeDisplayName) const
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175 {
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176 Resource::Format(node, parentPath, includeDisplayName);
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177
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178 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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179 prop.append_child("D:resourcetype").append_child("D:collection");
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180
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181 //prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value("httpd/unix-directory");
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182
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183 std::string s = GetName();
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184 prop.append_child("D:displayname").append_child(pugi::node_pcdata).set_value(s.c_str());
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185 }
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186
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187
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188 IWebDavBucket::Collection::~Collection()
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189 {
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190 for (std::list<Resource*>::iterator it = resources_.begin(); it != resources_.end(); ++it)
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191 {
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192 assert(*it != NULL);
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193 delete(*it);
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194 }
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195 }
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196
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197
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198 void IWebDavBucket::Collection::AddResource(Resource* resource) // Takes ownership
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199 {
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200 if (resource == NULL)
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201 {
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202 throw OrthancException(ErrorCode_NullPointer);
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203 }
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204 else
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205 {
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206 resources_.push_back(resource);
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207 }
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208 }
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209
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210
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211 void IWebDavBucket::Collection::Format(std::string& target,
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212 const std::string& parentPath,
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213 bool includeDisplayName) const
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214 {
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215 pugi::xml_document doc;
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216
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217 pugi::xml_node root = doc.append_child("D:multistatus");
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218 root.append_attribute("xmlns:D").set_value("DAV:");
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219
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220 for (std::list<Resource*>::const_iterator
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221 it = resources_.begin(); it != resources_.end(); ++it)
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222 {
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223 assert(*it != NULL);
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224 pugi::xml_node n = root.append_child();
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225 (*it)->Format(n, parentPath, includeDisplayName);
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226 }
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227
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228 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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229 decl.append_attribute("version").set_value("1.0");
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230 decl.append_attribute("encoding").set_value("UTF-8");
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231
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232 Toolbox::XmlToString(target, doc);
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233 }
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234
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235
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236 void IWebDavBucket::AnswerFakedProppatch(HttpOutput& output,
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237 const std::string& uri)
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238 {
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239 /**
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240 * This is a fake implementation. The goal is to make happy the
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241 * WebDAV clients that set properties (such as Windows >= 7).
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242 **/
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243
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244 pugi::xml_document doc;
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245
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246 pugi::xml_node root = doc.append_child("D:multistatus");
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247 root.append_attribute("xmlns:D").set_value("DAV:");
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248
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249 pugi::xml_node response = root.append_child("D:response");
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250 response.append_child("D:href").append_child(pugi::node_pcdata).set_value(uri.c_str());
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251
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252 response.append_child("D:propstat");
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253
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254 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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255 decl.append_attribute("version").set_value("1.0");
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256 decl.append_attribute("encoding").set_value("UTF-8");
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257
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258 std::string s;
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259 Toolbox::XmlToString(s, doc);
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260
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261 output.AddHeader("Content-Type", "application/xml");
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262 output.SendStatus(HttpStatus_207_MultiStatus, s);
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263 }
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264
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265
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266 void IWebDavBucket::AnswerFakedLock(HttpOutput& output,
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267 const std::string& uri)
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268 {
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269 /**
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270 * This is a fake implementation. No lock is actually
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271 * created. The goal is to make happy the WebDAV clients
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272 * that use locking (such as Windows >= 7).
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273 **/
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274
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275 pugi::xml_document doc;
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276
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277 pugi::xml_node root = doc.append_child("D:prop");
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278 root.append_attribute("xmlns:D").set_value("DAV:");
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279
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280 pugi::xml_node activelock = root.append_child("D:lockdiscovery").append_child("D:activelock");
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281 activelock.append_child("D:locktype").append_child("D:write");
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282 activelock.append_child("D:lockscope").append_child("D:exclusive");
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283 activelock.append_child("D:depth").append_child(pugi::node_pcdata).set_value("0");
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284 activelock.append_child("D:timeout").append_child(pugi::node_pcdata).set_value("Second-3599");
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285
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286 activelock.append_child("D:lockroot").append_child("D:href")
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287 .append_child(pugi::node_pcdata).set_value(uri.c_str());
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288 activelock.append_child("D:owner");
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289
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290 std::string token = Toolbox::GenerateUuid();
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291 boost::erase_all(token, "-");
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292 token = "opaquelocktoken:0x" + token;
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293
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294 activelock.append_child("D:locktoken").append_child("D:href").
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295 append_child(pugi::node_pcdata).set_value(token.c_str());
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296
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297 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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298 decl.append_attribute("version").set_value("1.0");
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299 decl.append_attribute("encoding").set_value("UTF-8");
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300
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301 std::string s;
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302 Toolbox::XmlToString(s, doc);
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303
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304 output.AddHeader("Lock-Token", token); // Necessary for davfs2
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305 output.AddHeader("Content-Type", "application/xml");
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306 output.SendStatus(HttpStatus_201_Created, s);
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307 }
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308
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309
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310 void IWebDavBucket::AnswerFakedUnlock(HttpOutput& output)
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311 {
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312 output.SendStatus(HttpStatus_204_NoContent);
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313 }
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314 }