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annotate OrthancFramework/Sources/HttpServer/IWebDavBucket.cpp @ 4984:c8cdf5163cd2

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author Alain Mazy <am@osimis.io>
date Mon, 25 Apr 2022 18:54:45 +0200
parents 43e613a7756b
children 0ea402b4d901
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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
4870
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "../PrecompiledHeaders.h"
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25 #include "IWebDavBucket.h"
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26
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27 #include "HttpOutput.h"
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28 #include "../OrthancException.h"
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29 #include "../Toolbox.h"
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30
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31
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32 static boost::posix_time::ptime GetNow()
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33 {
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34 return boost::posix_time::second_clock::universal_time();
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35 }
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36
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37
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38 static std::string AddTrailingSlash(const std::string& s)
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39 {
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40 if (s.empty() ||
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41 s[s.size() - 1] != '/')
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42 {
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43 return s + '/';
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44 }
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45 else
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46 {
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47 return s;
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48 }
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49 }
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50
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51
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52 namespace Orthanc
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53 {
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54 IWebDavBucket::Resource::Resource(const std::string& displayName) :
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55 displayName_(displayName),
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56 hasModificationTime_(false),
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57 creationTime_(GetNow()),
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58 modificationTime_(GetNow())
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59 {
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60 if (displayName.empty() ||
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61 displayName.find('/') != std::string::npos ||
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62 displayName.find('\\') != std::string::npos ||
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63 displayName.find('\0') != std::string::npos)
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64 {
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65 throw OrthancException(ErrorCode_ParameterOutOfRange,
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66 "Bad resource name for WebDAV: " + displayName);
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67 }
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68 }
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69
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70
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71 void IWebDavBucket::Resource::SetCreationTime(const boost::posix_time::ptime& t)
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72 {
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73 if (t.is_special())
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74 {
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75 throw OrthancException(ErrorCode_ParameterOutOfRange, "Not a valid date-time");
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76 }
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77 else
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78 {
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79 creationTime_ = t;
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80
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81 if (!hasModificationTime_)
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82 {
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83 modificationTime_ = t;
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84 }
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85 }
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86 }
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87
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88
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89 void IWebDavBucket::Resource::SetModificationTime(const boost::posix_time::ptime& t)
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90 {
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91 if (t.is_special())
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92 {
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93 throw OrthancException(ErrorCode_ParameterOutOfRange, "Not a valid date-time");
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94 }
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95 else
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96 {
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97 modificationTime_ = t;
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98 hasModificationTime_ = true;
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99 }
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100 }
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101
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102
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103 static void FormatInternal(pugi::xml_node& node,
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104 const std::string& href,
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105 const std::string& displayName,
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106 const boost::posix_time::ptime& creationTime,
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107 const boost::posix_time::ptime& modificationTime)
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108 {
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109 node.set_name("D:response");
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110
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111 node.append_child("D:href").append_child(pugi::node_pcdata).set_value(href.c_str());
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112
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113 pugi::xml_node propstat = node.append_child("D:propstat");
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114
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115 static const HttpStatus status = HttpStatus_200_Ok;
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116 std::string s = ("HTTP/1.1 " + boost::lexical_cast<std::string>(status) + " " +
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117 std::string(EnumerationToString(status)));
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118 propstat.append_child("D:status").append_child(pugi::node_pcdata).set_value(s.c_str());
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119
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120 pugi::xml_node prop = propstat.append_child("D:prop");
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121 prop.append_child("D:displayname").append_child(pugi::node_pcdata).set_value(displayName.c_str());
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122
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123 // IMPORTANT: Adding the "Z" suffix is mandatory on Windows >= 7 (it indicates UTC)
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124 assert(!creationTime.is_special());
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125 s = boost::posix_time::to_iso_extended_string(creationTime) + "Z";
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126 prop.append_child("D:creationdate").append_child(pugi::node_pcdata).set_value(s.c_str());
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127
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128 assert(!modificationTime.is_special());
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129 s = boost::posix_time::to_iso_extended_string(modificationTime) + "Z";
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130 prop.append_child("D:getlastmodified").append_child(pugi::node_pcdata).set_value(s.c_str());
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131
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132 #if 0
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133 // Maybe used by davfs2
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134 prop.append_child("D:quota-available-bytes");
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135 prop.append_child("D:quota-used-bytes");
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136 #endif
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137
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138 #if 0
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139 prop.append_child("D:lockdiscovery");
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140 pugi::xml_node lock = prop.append_child("D:supportedlock");
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141
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142 pugi::xml_node lockentry = lock.append_child("D:lockentry");
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143 lockentry.append_child("D:lockscope").append_child("D:exclusive");
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144 lockentry.append_child("D:locktype").append_child("D:write");
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145
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146 lockentry = lock.append_child("D:lockentry");
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147 lockentry.append_child("D:lockscope").append_child("D:shared");
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148 lockentry.append_child("D:locktype").append_child("D:write");
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149 #endif
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150 }
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151
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152
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153 IWebDavBucket::File::File(const std::string& displayName) :
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154 Resource(displayName),
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155 contentLength_(0),
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156 mime_(MimeType_Binary)
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157 {
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158 }
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159
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160
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161 void IWebDavBucket::File::Format(pugi::xml_node& node,
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162 const std::string& parentPath) const
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163 {
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164 std::string href;
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165 Toolbox::UriEncode(href, AddTrailingSlash(parentPath) + GetDisplayName());
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166 FormatInternal(node, href, GetDisplayName(), GetCreationTime(), GetModificationTime());
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167
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168 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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169 prop.append_child("D:resourcetype");
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170
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171 std::string s = boost::lexical_cast<std::string>(contentLength_);
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172 prop.append_child("D:getcontentlength").append_child(pugi::node_pcdata).set_value(s.c_str());
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173
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174 s = EnumerationToString(mime_);
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175 prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value(s.c_str());
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176 }
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177
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178
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179 void IWebDavBucket::Folder::Format(pugi::xml_node& node,
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180 const std::string& parentPath) const
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181 {
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182 std::string href;
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183 Toolbox::UriEncode(href, AddTrailingSlash(parentPath) + GetDisplayName());
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184 FormatInternal(node, href, GetDisplayName(), GetCreationTime(), GetModificationTime());
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185
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186 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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187 prop.append_child("D:resourcetype").append_child("D:collection");
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188
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189 //prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value("httpd/unix-directory");
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190 }
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191
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192
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193 IWebDavBucket::Collection::~Collection()
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194 {
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195 for (std::list<Resource*>::iterator it = resources_.begin(); it != resources_.end(); ++it)
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196 {
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197 assert(*it != NULL);
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198 delete(*it);
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199 }
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200 }
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201
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202
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203 void IWebDavBucket::Collection::AddResource(Resource* resource) // Takes ownership
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204 {
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205 if (resource == NULL)
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206 {
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207 throw OrthancException(ErrorCode_NullPointer);
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208 }
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209 else
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210 {
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211 resources_.push_back(resource);
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212 }
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213 }
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214
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215
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216 void IWebDavBucket::Collection::ListDisplayNames(std::set<std::string>& target)
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217 {
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218 for (std::list<Resource*>::iterator it = resources_.begin(); it != resources_.end(); ++it)
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219 {
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220 assert(*it != NULL);
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221 target.insert((*it)->GetDisplayName());
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222 }
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223 }
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224
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225
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226 void IWebDavBucket::Collection::Format(std::string& target,
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227 const std::string& parentPath) const
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228 {
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229 pugi::xml_document doc;
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230
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231 pugi::xml_node root = doc.append_child("D:multistatus");
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232 root.append_attribute("xmlns:D").set_value("DAV:");
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233
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234 {
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235 pugi::xml_node self = root.append_child();
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236
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237 std::vector<std::string> tokens;
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238 Toolbox::SplitUriComponents(tokens, parentPath);
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239
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240 std::string folder;
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241 if (!tokens.empty())
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242 {
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243 folder = tokens.back();
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244 }
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245
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246 std::string href;
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247 Toolbox::UriEncode(href, Toolbox::FlattenUri(tokens) + "/");
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248
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249 boost::posix_time::ptime now = GetNow();
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250 FormatInternal(self, href, folder, now, now);
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251
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252 pugi::xml_node prop = self.first_element_by_path("D:propstat/D:prop");
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253 prop.append_child("D:resourcetype").append_child("D:collection");
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254 }
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255
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256 for (std::list<Resource*>::const_iterator
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257 it = resources_.begin(); it != resources_.end(); ++it)
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258 {
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259 assert(*it != NULL);
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260 pugi::xml_node n = root.append_child();
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261 (*it)->Format(n, parentPath);
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262 }
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263
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264 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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265 decl.append_attribute("version").set_value("1.0");
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266 decl.append_attribute("encoding").set_value("UTF-8");
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267
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268 Toolbox::XmlToString(target, doc);
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269 }
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270
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271
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272 void IWebDavBucket::AnswerFakedProppatch(HttpOutput& output,
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273 const std::string& uri)
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274 {
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275 /**
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276 * This is a fake implementation. The goal is to make happy the
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277 * WebDAV clients that set properties (such as Windows >= 7).
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278 **/
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279
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280 pugi::xml_document doc;
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281
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282 pugi::xml_node root = doc.append_child("D:multistatus");
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283 root.append_attribute("xmlns:D").set_value("DAV:");
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284
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285 pugi::xml_node response = root.append_child("D:response");
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286 response.append_child("D:href").append_child(pugi::node_pcdata).set_value(uri.c_str());
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287
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288 response.append_child("D:propstat");
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289
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290 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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291 decl.append_attribute("version").set_value("1.0");
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292 decl.append_attribute("encoding").set_value("UTF-8");
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293
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294 std::string s;
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295 Toolbox::XmlToString(s, doc);
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296
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297 output.AddHeader("Content-Type", "application/xml");
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298 output.SendStatus(HttpStatus_207_MultiStatus, s);
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299 }
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300
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301
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302 void IWebDavBucket::AnswerFakedLock(HttpOutput& output,
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303 const std::string& uri)
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304 {
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305 /**
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306 * This is a fake implementation. No lock is actually
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307 * created. The goal is to make happy the WebDAV clients
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308 * that use locking (such as Windows >= 7).
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309 **/
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310
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311 pugi::xml_document doc;
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312
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313 pugi::xml_node root = doc.append_child("D:prop");
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314 root.append_attribute("xmlns:D").set_value("DAV:");
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315
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316 pugi::xml_node activelock = root.append_child("D:lockdiscovery").append_child("D:activelock");
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317 activelock.append_child("D:locktype").append_child("D:write");
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318 activelock.append_child("D:lockscope").append_child("D:exclusive");
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319 activelock.append_child("D:depth").append_child(pugi::node_pcdata).set_value("0");
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320 activelock.append_child("D:timeout").append_child(pugi::node_pcdata).set_value("Second-3599");
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321
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322 activelock.append_child("D:lockroot").append_child("D:href")
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323 .append_child(pugi::node_pcdata).set_value(uri.c_str());
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324 activelock.append_child("D:owner");
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325
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326 std::string token = Toolbox::GenerateUuid();
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327 boost::erase_all(token, "-");
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328 token = "opaquelocktoken:0x" + token;
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329
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330 activelock.append_child("D:locktoken").append_child("D:href").
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331 append_child(pugi::node_pcdata).set_value(token.c_str());
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332
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333 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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334 decl.append_attribute("version").set_value("1.0");
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335 decl.append_attribute("encoding").set_value("UTF-8");
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336
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337 std::string s;
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338 Toolbox::XmlToString(s, doc);
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339
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340 output.AddHeader("Lock-Token", token); // Necessary for davfs2
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341 output.AddHeader("Content-Type", "application/xml");
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342 output.SendStatus(HttpStatus_201_Created, s);
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343 }
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344
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345
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346 void IWebDavBucket::AnswerFakedUnlock(HttpOutput& output)
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347 {
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348 output.SendStatus(HttpStatus_204_NoContent);
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349 }
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350 }