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annotate OrthancFramework/Sources/HttpServer/IWebDavBucket.cpp @ 4247:112951171852

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 13 Oct 2020 10:46:05 +0200
parents 6c3721ff284c
children f047e2734655
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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 if (t.is_special())
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78 {
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79 throw OrthancException(ErrorCode_ParameterOutOfRange, "Not a valid date-time");
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80 }
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81 else
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82 {
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83 creationTime_ = t;
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84
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85 if (!hasModificationTime_)
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86 {
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87 modificationTime_ = t;
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88 }
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89 }
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90 }
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91
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92
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93 void IWebDavBucket::Resource::SetModificationTime(const boost::posix_time::ptime& t)
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94 {
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95 if (t.is_special())
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96 {
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97 throw OrthancException(ErrorCode_ParameterOutOfRange, "Not a valid date-time");
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98 }
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99 else
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100 {
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101 modificationTime_ = t;
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102 hasModificationTime_ = true;
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103 }
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104 }
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105
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106
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107 static void FormatInternal(pugi::xml_node& node,
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108 const std::string& href,
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109 const std::string& displayName,
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110 const boost::posix_time::ptime& creationTime,
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111 const boost::posix_time::ptime& modificationTime)
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112 {
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113 node.set_name("D:response");
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114
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115 node.append_child("D:href").append_child(pugi::node_pcdata).set_value(href.c_str());
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116
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117 pugi::xml_node propstat = node.append_child("D:propstat");
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118
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119 static const HttpStatus status = HttpStatus_200_Ok;
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120 std::string s = ("HTTP/1.1 " + boost::lexical_cast<std::string>(status) + " " +
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121 std::string(EnumerationToString(status)));
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122 propstat.append_child("D:status").append_child(pugi::node_pcdata).set_value(s.c_str());
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123
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124 pugi::xml_node prop = propstat.append_child("D:prop");
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125 prop.append_child("D:displayname").append_child(pugi::node_pcdata).set_value(displayName.c_str());
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126
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127 // IMPORTANT: Adding the "Z" suffix is mandatory on Windows >= 7 (it indicates UTC)
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128 assert(!creationTime.is_special());
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129 s = boost::posix_time::to_iso_extended_string(creationTime) + "Z";
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130 prop.append_child("D:creationdate").append_child(pugi::node_pcdata).set_value(s.c_str());
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131
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132 assert(!modificationTime.is_special());
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133 s = boost::posix_time::to_iso_extended_string(modificationTime) + "Z";
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134 prop.append_child("D:getlastmodified").append_child(pugi::node_pcdata).set_value(s.c_str());
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135
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136 #if 0
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137 // Maybe used by davfs2
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138 prop.append_child("D:quota-available-bytes");
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139 prop.append_child("D:quota-used-bytes");
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140 #endif
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141
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142 #if 0
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143 prop.append_child("D:lockdiscovery");
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144 pugi::xml_node lock = prop.append_child("D:supportedlock");
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145
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146 pugi::xml_node lockentry = lock.append_child("D:lockentry");
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147 lockentry.append_child("D:lockscope").append_child("D:exclusive");
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148 lockentry.append_child("D:locktype").append_child("D:write");
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149
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150 lockentry = lock.append_child("D:lockentry");
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151 lockentry.append_child("D:lockscope").append_child("D:shared");
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152 lockentry.append_child("D:locktype").append_child("D:write");
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153 #endif
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154 }
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155
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156
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157 IWebDavBucket::File::File(const std::string& name) :
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158 contentLength_(0),
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159 mime_(MimeType_Binary)
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160 {
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161 if (name.empty())
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162 {
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163 throw OrthancException(ErrorCode_ParameterOutOfRange,
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164 "Cannot use an empty filename in WebDAV");
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165 }
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166
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167 SetNameInternal(name);
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168 }
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169
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170
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171 void IWebDavBucket::File::Format(pugi::xml_node& node,
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172 const std::string& parentPath) const
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173 {
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174 std::string href;
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175 Toolbox::UriEncode(href, AddTrailingSlash(parentPath) + GetName());
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176 FormatInternal(node, href, GetName(), GetCreationTime(), GetModificationTime());
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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");
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180
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181 std::string s = boost::lexical_cast<std::string>(contentLength_);
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182 prop.append_child("D:getcontentlength").append_child(pugi::node_pcdata).set_value(s.c_str());
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183
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184 s = EnumerationToString(mime_);
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185 prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value(s.c_str());
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186 }
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187
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188
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189 void IWebDavBucket::Folder::Format(pugi::xml_node& node,
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190 const std::string& parentPath) const
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191 {
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192 std::string href;
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193 Toolbox::UriEncode(href, AddTrailingSlash(parentPath) + GetName());
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194 FormatInternal(node, href, GetName(), GetCreationTime(), GetModificationTime());
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195
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196 pugi::xml_node prop = node.first_element_by_path("D:propstat/D:prop");
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197 prop.append_child("D:resourcetype").append_child("D:collection");
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198
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199 //prop.append_child("D:getcontenttype").append_child(pugi::node_pcdata).set_value("httpd/unix-directory");
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200 }
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201
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202
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203 IWebDavBucket::Collection::~Collection()
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204 {
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205 for (std::list<Resource*>::iterator it = resources_.begin(); it != resources_.end(); ++it)
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206 {
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207 assert(*it != NULL);
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208 delete(*it);
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209 }
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210 }
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211
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212
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213 void IWebDavBucket::Collection::AddResource(Resource* resource) // Takes ownership
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214 {
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215 if (resource == NULL)
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216 {
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217 throw OrthancException(ErrorCode_NullPointer);
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218 }
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219 else
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220 {
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221 resources_.push_back(resource);
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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::string folder;
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238 size_t lastSlash = parentPath.rfind('/');
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239 if (lastSlash == std::string::npos)
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240 {
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241 folder = parentPath;
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242 }
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243 else
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244 {
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245 folder = parentPath.substr(lastSlash + 1);
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246 }
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247
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248 std::string href;
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249 Toolbox::UriEncode(href, AddTrailingSlash(parentPath));
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250
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251 boost::posix_time::ptime now = GetNow();
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252 FormatInternal(self, href, folder, now, now);
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253
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254 pugi::xml_node prop = self.first_element_by_path("D:propstat/D:prop");
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255 prop.append_child("D:resourcetype").append_child("D:collection");
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256 }
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257
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258 for (std::list<Resource*>::const_iterator
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259 it = resources_.begin(); it != resources_.end(); ++it)
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260 {
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261 assert(*it != NULL);
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262 pugi::xml_node n = root.append_child();
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263 (*it)->Format(n, parentPath);
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264 }
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265
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266 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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267 decl.append_attribute("version").set_value("1.0");
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268 decl.append_attribute("encoding").set_value("UTF-8");
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269
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270 Toolbox::XmlToString(target, doc);
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271 }
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272
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273
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274 void IWebDavBucket::AnswerFakedProppatch(HttpOutput& output,
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275 const std::string& uri)
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276 {
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277 /**
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278 * This is a fake implementation. The goal is to make happy the
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279 * WebDAV clients that set properties (such as Windows >= 7).
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280 **/
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281
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282 pugi::xml_document doc;
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283
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284 pugi::xml_node root = doc.append_child("D:multistatus");
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285 root.append_attribute("xmlns:D").set_value("DAV:");
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286
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287 pugi::xml_node response = root.append_child("D:response");
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288 response.append_child("D:href").append_child(pugi::node_pcdata).set_value(uri.c_str());
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289
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290 response.append_child("D:propstat");
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291
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292 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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293 decl.append_attribute("version").set_value("1.0");
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294 decl.append_attribute("encoding").set_value("UTF-8");
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295
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296 std::string s;
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297 Toolbox::XmlToString(s, doc);
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298
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299 output.AddHeader("Content-Type", "application/xml");
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300 output.SendStatus(HttpStatus_207_MultiStatus, s);
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301 }
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302
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303
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304 void IWebDavBucket::AnswerFakedLock(HttpOutput& output,
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305 const std::string& uri)
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306 {
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307 /**
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308 * This is a fake implementation. No lock is actually
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309 * created. The goal is to make happy the WebDAV clients
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310 * that use locking (such as Windows >= 7).
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311 **/
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312
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313 pugi::xml_document doc;
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314
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315 pugi::xml_node root = doc.append_child("D:prop");
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316 root.append_attribute("xmlns:D").set_value("DAV:");
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317
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318 pugi::xml_node activelock = root.append_child("D:lockdiscovery").append_child("D:activelock");
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319 activelock.append_child("D:locktype").append_child("D:write");
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320 activelock.append_child("D:lockscope").append_child("D:exclusive");
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321 activelock.append_child("D:depth").append_child(pugi::node_pcdata).set_value("0");
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322 activelock.append_child("D:timeout").append_child(pugi::node_pcdata).set_value("Second-3599");
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323
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324 activelock.append_child("D:lockroot").append_child("D:href")
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325 .append_child(pugi::node_pcdata).set_value(uri.c_str());
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326 activelock.append_child("D:owner");
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327
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328 std::string token = Toolbox::GenerateUuid();
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329 boost::erase_all(token, "-");
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330 token = "opaquelocktoken:0x" + token;
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331
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332 activelock.append_child("D:locktoken").append_child("D:href").
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333 append_child(pugi::node_pcdata).set_value(token.c_str());
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334
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335 pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
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336 decl.append_attribute("version").set_value("1.0");
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337 decl.append_attribute("encoding").set_value("UTF-8");
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338
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339 std::string s;
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340 Toolbox::XmlToString(s, doc);
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341
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342 output.AddHeader("Lock-Token", token); // Necessary for davfs2
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343 output.AddHeader("Content-Type", "application/xml");
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344 output.SendStatus(HttpStatus_201_Created, s);
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345 }
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346
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347
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348 void IWebDavBucket::AnswerFakedUnlock(HttpOutput& output)
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349 {
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350 output.SendStatus(HttpStatus_204_NoContent);
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351 }
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352 }