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annotate OrthancFramework/Sources/HttpServer/IWebDavBucket.cpp @ 4706:dbee8bd8ee1f

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 22 Jun 2021 09:13:03 +0200
parents d9473bd5ed43
children 7053502fbf97
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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) 2017-2021 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 IWebDavBucket::Resource::Resource(const std::string& displayName) :
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54 displayName_(displayName),
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55 hasModificationTime_(false),
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56 creationTime_(GetNow()),
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57 modificationTime_(GetNow())
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58 {
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59 if (displayName.empty() ||
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60 displayName.find('/') != std::string::npos ||
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61 displayName.find('\\') != std::string::npos ||
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62 displayName.find('\0') != std::string::npos)
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63 {
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64 throw OrthancException(ErrorCode_ParameterOutOfRange,
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65 "Bad resource name for WebDAV: " + displayName);
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66 }
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67 }
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68
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69
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70 void IWebDavBucket::Resource::SetCreationTime(const boost::posix_time::ptime& t)
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71 {
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72 if (t.is_special())
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73 {
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74 throw OrthancException(ErrorCode_ParameterOutOfRange, "Not a valid date-time");
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75 }
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76 else
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77 {
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78 creationTime_ = t;
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79
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80 if (!hasModificationTime_)
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81 {
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82 modificationTime_ = t;
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83 }
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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 void IWebDavBucket::Resource::SetModificationTime(const boost::posix_time::ptime& t)
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89 {
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90 if (t.is_special())
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91 {
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92 throw OrthancException(ErrorCode_ParameterOutOfRange, "Not a valid date-time");
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93 }
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94 else
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95 {
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96 modificationTime_ = t;
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97 hasModificationTime_ = true;
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98 }
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99 }
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100
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101
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102 static void FormatInternal(pugi::xml_node& node,
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103 const std::string& href,
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104 const std::string& displayName,
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105 const boost::posix_time::ptime& creationTime,
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106 const boost::posix_time::ptime& modificationTime)
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107 {
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108 node.set_name("D:response");
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109
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110 node.append_child("D:href").append_child(pugi::node_pcdata).set_value(href.c_str());
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111
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112 pugi::xml_node propstat = node.append_child("D:propstat");
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113
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114 static const HttpStatus status = HttpStatus_200_Ok;
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115 std::string s = ("HTTP/1.1 " + boost::lexical_cast<std::string>(status) + " " +
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116 std::string(EnumerationToString(status)));
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117 propstat.append_child("D:status").append_child(pugi::node_pcdata).set_value(s.c_str());
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118
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119 pugi::xml_node prop = propstat.append_child("D:prop");
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120 prop.append_child("D:displayname").append_child(pugi::node_pcdata).set_value(displayName.c_str());
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121
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122 // IMPORTANT: Adding the "Z" suffix is mandatory on Windows >= 7 (it indicates UTC)
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123 assert(!creationTime.is_special());
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124 s = boost::posix_time::to_iso_extended_string(creationTime) + "Z";
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125 prop.append_child("D:creationdate").append_child(pugi::node_pcdata).set_value(s.c_str());
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126
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127 assert(!modificationTime.is_special());
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128 s = boost::posix_time::to_iso_extended_string(modificationTime) + "Z";
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129 prop.append_child("D:getlastmodified").append_child(pugi::node_pcdata).set_value(s.c_str());
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130
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131 #if 0
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132 // Maybe used by davfs2
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133 prop.append_child("D:quota-available-bytes");
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134 prop.append_child("D:quota-used-bytes");
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135 #endif
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136
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137 #if 0
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138 prop.append_child("D:lockdiscovery");
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139 pugi::xml_node lock = prop.append_child("D:supportedlock");
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140
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141 pugi::xml_node lockentry = lock.append_child("D:lockentry");
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142 lockentry.append_child("D:lockscope").append_child("D:exclusive");
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143 lockentry.append_child("D:locktype").append_child("D:write");
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144
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145 lockentry = lock.append_child("D:lockentry");
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146 lockentry.append_child("D:lockscope").append_child("D:shared");
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147 lockentry.append_child("D:locktype").append_child("D:write");
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148 #endif
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149 }
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150
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151
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152 IWebDavBucket::File::File(const std::string& displayName) :
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153 Resource(displayName),
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154 contentLength_(0),
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155 mime_(MimeType_Binary)
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156 {
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157 }
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158
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159
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160 void IWebDavBucket::File::Format(pugi::xml_node& node,
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161 const std::string& parentPath) const
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162 {
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163 std::string href;
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164 Toolbox::UriEncode(href, AddTrailingSlash(parentPath) + GetDisplayName());
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165 FormatInternal(node, href, GetDisplayName(), GetCreationTime(), GetModificationTime());
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166
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167 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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168 prop.append_child("D:resourcetype");
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169
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170 std::string s = boost::lexical_cast<std::string>(contentLength_);
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171 prop.append_child("D:getcontentlength").append_child(pugi::node_pcdata).set_value(s.c_str());
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172
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173 s = EnumerationToString(mime_);
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174 prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value(s.c_str());
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175 }
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176
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177
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178 void IWebDavBucket::Folder::Format(pugi::xml_node& node,
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179 const std::string& parentPath) const
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180 {
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181 std::string href;
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182 Toolbox::UriEncode(href, AddTrailingSlash(parentPath) + GetDisplayName());
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183 FormatInternal(node, href, GetDisplayName(), GetCreationTime(), GetModificationTime());
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184
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185 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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186 prop.append_child("D:resourcetype").append_child("D:collection");
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187
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188 //prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value("httpd/unix-directory");
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189 }
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190
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191
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192 IWebDavBucket::Collection::~Collection()
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193 {
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194 for (std::list<Resource*>::iterator it = resources_.begin(); it != resources_.end(); ++it)
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195 {
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196 assert(*it != NULL);
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197 delete(*it);
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198 }
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199 }
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200
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201
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202 void IWebDavBucket::Collection::AddResource(Resource* resource) // Takes ownership
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203 {
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204 if (resource == NULL)
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205 {
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206 throw OrthancException(ErrorCode_NullPointer);
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207 }
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208 else
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209 {
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210 resources_.push_back(resource);
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211 }
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212 }
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213
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214
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215 void IWebDavBucket::Collection::ListDisplayNames(std::set<std::string>& target)
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216 {
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217 for (std::list<Resource*>::iterator it = resources_.begin(); it != resources_.end(); ++it)
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218 {
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219 assert(*it != NULL);
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220 target.insert((*it)->GetDisplayName());
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221 }
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222 }
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223
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224
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225 void IWebDavBucket::Collection::Format(std::string& target,
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226 const std::string& parentPath) const
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227 {
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228 pugi::xml_document doc;
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229
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230 pugi::xml_node root = doc.append_child("D:multistatus");
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231 root.append_attribute("xmlns:D").set_value("DAV:");
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232
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233 {
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234 pugi::xml_node self = root.append_child();
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235
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236 std::vector<std::string> tokens;
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237 Toolbox::SplitUriComponents(tokens, parentPath);
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238
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239 std::string folder;
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240 if (!tokens.empty())
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241 {
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242 folder = tokens.back();
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243 }
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244
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245 std::string href;
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246 Toolbox::UriEncode(href, Toolbox::FlattenUri(tokens) + "/");
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247
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248 boost::posix_time::ptime now = GetNow();
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249 FormatInternal(self, href, folder, now, now);
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250
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251 pugi::xml_node prop = self.first_element_by_path("D:propstat/D:prop");
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252 prop.append_child("D:resourcetype").append_child("D:collection");
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253 }
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254
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255 for (std::list<Resource*>::const_iterator
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256 it = resources_.begin(); it != resources_.end(); ++it)
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257 {
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258 assert(*it != NULL);
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259 pugi::xml_node n = root.append_child();
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260 (*it)->Format(n, parentPath);
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261 }
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262
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263 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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264 decl.append_attribute("version").set_value("1.0");
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265 decl.append_attribute("encoding").set_value("UTF-8");
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266
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267 Toolbox::XmlToString(target, doc);
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268 }
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269
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270
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271 void IWebDavBucket::AnswerFakedProppatch(HttpOutput& output,
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272 const std::string& uri)
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273 {
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274 /**
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275 * This is a fake implementation. The goal is to make happy the
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276 * WebDAV clients that set properties (such as Windows >= 7).
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277 **/
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278
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279 pugi::xml_document doc;
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280
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281 pugi::xml_node root = doc.append_child("D:multistatus");
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282 root.append_attribute("xmlns:D").set_value("DAV:");
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283
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284 pugi::xml_node response = root.append_child("D:response");
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285 response.append_child("D:href").append_child(pugi::node_pcdata).set_value(uri.c_str());
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286
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287 response.append_child("D:propstat");
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288
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289 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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290 decl.append_attribute("version").set_value("1.0");
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291 decl.append_attribute("encoding").set_value("UTF-8");
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292
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293 std::string s;
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294 Toolbox::XmlToString(s, doc);
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295
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296 output.AddHeader("Content-Type", "application/xml");
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297 output.SendStatus(HttpStatus_207_MultiStatus, s);
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298 }
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299
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300
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301 void IWebDavBucket::AnswerFakedLock(HttpOutput& output,
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302 const std::string& uri)
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303 {
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304 /**
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305 * This is a fake implementation. No lock is actually
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306 * created. The goal is to make happy the WebDAV clients
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307 * that use locking (such as Windows >= 7).
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308 **/
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309
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310 pugi::xml_document doc;
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311
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312 pugi::xml_node root = doc.append_child("D:prop");
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313 root.append_attribute("xmlns:D").set_value("DAV:");
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314
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315 pugi::xml_node activelock = root.append_child("D:lockdiscovery").append_child("D:activelock");
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316 activelock.append_child("D:locktype").append_child("D:write");
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317 activelock.append_child("D:lockscope").append_child("D:exclusive");
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318 activelock.append_child("D:depth").append_child(pugi::node_pcdata).set_value("0");
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319 activelock.append_child("D:timeout").append_child(pugi::node_pcdata).set_value("Second-3599");
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320
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321 activelock.append_child("D:lockroot").append_child("D:href")
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322 .append_child(pugi::node_pcdata).set_value(uri.c_str());
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323 activelock.append_child("D:owner");
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324
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325 std::string token = Toolbox::GenerateUuid();
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326 boost::erase_all(token, "-");
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327 token = "opaquelocktoken:0x" + token;
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328
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329 activelock.append_child("D:locktoken").append_child("D:href").
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330 append_child(pugi::node_pcdata).set_value(token.c_str());
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331
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332 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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333 decl.append_attribute("version").set_value("1.0");
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334 decl.append_attribute("encoding").set_value("UTF-8");
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335
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336 std::string s;
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337 Toolbox::XmlToString(s, doc);
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338
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339 output.AddHeader("Lock-Token", token); // Necessary for davfs2
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340 output.AddHeader("Content-Type", "application/xml");
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341 output.SendStatus(HttpStatus_201_Created, s);
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342 }
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343
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344
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345 void IWebDavBucket::AnswerFakedUnlock(HttpOutput& output)
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346 {
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347 output.SendStatus(HttpStatus_204_NoContent);
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348 }
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349 }