src/server/plugins/postgresql/webdav.c

Sun, 01 May 2022 10:48:20 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 01 May 2022 10:48:20 +0200
branch
webdav
changeset 319
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parent 318
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child 324
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permissions
-rw-r--r--

add WebdavNSList <-> string converting functions

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2022 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "webdav.h"
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30 #include "vfs.h"
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31
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32 #include "../../util/util.h"
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33 #include "../../util/pblock.h"
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34
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35 #include <ucx/buffer.h>
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36 #include <libxml/tree.h>
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37
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38
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39 static WebdavBackend pg_webdav_backend = {
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40 pg_dav_propfind_init,
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41 pg_dav_propfind_do,
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42 pg_dav_propfind_finish,
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43 pg_dav_proppatch_do,
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44 pg_dav_proppatch_finish,
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45 NULL, // opt_mkcol
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46 NULL, // opt_mkcol_finish
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47 NULL, // opt_delete
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48 NULL, // opt_delete_finish
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49 0,
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50 NULL,
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51 NULL
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52 };
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53
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54
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55 /*
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56 * SQL Queries
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57 */
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58
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59 // propfind with depth = 0
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60 // params: $1: resource_id
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61 static const char *sql_propfind_allprop_depth0 = "\
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62 select\n\
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63 $2::text as ppath,\n\
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64 r.resource_id,\n\
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65 r.parent_id,\n\
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66 r.nodename,\n\
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67 r.iscollection,\n\
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68 r.lastmodified,\n\
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69 r.creationdate,\n\
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70 r.contentlength,\n\
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71 p.prefix,\n\
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72 p.xmlns,\n\
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73 p.pname,\n\
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74 p.lang,\n\
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75 p.nsdeflist,\n\
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76 p.pvalue\n\
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77 from Resource r\n\
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78 left join Property p on r.resource_id = p.resource_id\n\
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79 where r.resource_id = $1;";
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80
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81 // propfind with depth = 0 for specific properties
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82 // params: $1: resource_id
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83 static const char *sql_propfind_depth0 = "\
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84 select\n\
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85 $2::text as ppath,\n\
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86 r.resource_id,\n\
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87 r.parent_id,\n\
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88 r.nodename,\n\
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89 r.iscollection,\n\
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90 r.lastmodified,\n\
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91 r.creationdate,\n\
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92 r.contentlength,\n\
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93 p.prefix,\n\
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94 p.xmlns,\n\
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95 p.pname,\n\
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96 p.lang,\n\
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97 p.nsdeflist,\n\
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98 p.pvalue\n\
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99 from Resource r\n\
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100 left join (\n\
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101 select p.* from Property p\
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102 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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103 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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104 ) p on r.resource_id = p.resource_id\n\
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105 where r.resource_id = $1;";
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106
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107 // propfind with depth = 1
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108 // params: $1: resource_id
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109 static const char *sql_propfind_allprop_depth1 = "\
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110 select\n\
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111 case when r.resource_id = $1 then $2\n\
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112 else $2 || '/' || r.nodename\n\
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113 end as ppath,\n\
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114 r.resource_id,\n\
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115 r.parent_id,\n\
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116 r.nodename,\n\
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117 r.iscollection,\n\
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118 r.lastmodified,\n\
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119 r.creationdate,\n\
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120 r.contentlength,\n\
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121 p.prefix,\n\
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122 p.xmlns,\n\
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123 p.pname,\n\
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124 p.lang,\n\
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125 p.nsdeflist,\n\
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126 p.pvalue\n\
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127 from Resource r\n\
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128 left join Property p on r.resource_id = p.resource_id\n\
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129 where r.resource_id = $1 or r.parent_id = $1\n\
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130 order by case when r.resource_id = $1 then 0 else 1 end, nodename, resource_id;";
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131
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132
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133 // propfind with depth = 1 for specific properties
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134 // params: $1: resource_id
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135 static const char *sql_propfind_depth1 = "\
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136 select\n\
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137 case when r.resource_id = $1 then $2\n\
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138 else $2 || '/' || r.nodename\n\
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139 end as ppath,\n\
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140 r.resource_id,\n\
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141 r.parent_id,\n\
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142 r.nodename,\n\
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143 r.iscollection,\n\
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144 r.lastmodified,\n\
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145 r.creationdate,\n\
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146 r.contentlength,\n\
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147 p.prefix,\n\
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148 p.xmlns,\n\
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149 p.pname,\n\
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150 p.lang,\n\
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151 p.nsdeflist,\n\
306
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152 p.pvalue\n\
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153 from Resource r\n\
315
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154 left join (\n\
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155 select p.* from Property p\
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156 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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157 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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158 ) p on r.resource_id = p.resource_id\n\
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159 where r.resource_id = $1 or r.parent_id = $1\n\
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160 order by case when r.resource_id = $1 then 0 else 1 end, nodename, resource_id;";
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161
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162 // recursive propfind
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163 // params: $1: resource_id
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164 static const char *sql_propfind_allprop_recursive = "\
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165 with recursive resolvepath as (\n\
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166 select\n\
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167 '' as ppath,\n\
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168 *\n\
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169 from Resource\n\
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170 where resource_id = $1 \n\
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171 union\n\
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172 select\n\
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173 p.ppath || '/' || r.nodename,\n\
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174 r.*\n\
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175 from Resource r\n\
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176 inner join resolvepath p on r.parent_id = p.resource_id\n\
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177 )\n\
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178 select\n\
307
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179 case when r.resource_id = $1 then $2\n\
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180 else $2 || r.ppath\n\
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181 end as ppath,\n\
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182 r.resource_id,\n\
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183 r.parent_id,\n\
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184 r.nodename,\n\
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185 r.iscollection,\n\
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186 r.lastmodified,\n\
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187 r.creationdate,\n\
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188 r.contentlength,\n\
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189 p.prefix,\n\
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190 p.xmlns,\n\
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191 p.pname,\n\
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192 p.lang,\n\
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193 p.nsdeflist,\n\
306
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194 p.pvalue\n\
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195 from resolvepath r\n\
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196 left join Property p on r.resource_id = p.resource_id\n\
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197 order by replace(ppath, '/', chr(1)), resource_id;";
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198
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199 // recursive propfind for specific properties
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200 // params: $1: resource_id
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201 // $2: array of property xmlns
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202 // $3: array of property names
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203 static const char *sql_propfind_recursive = "\
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204 with recursive resolvepath as (\n\
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205 select\n\
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206 '' as ppath,\n\
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207 *\n\
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208 from Resource\n\
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209 where resource_id = $1 \n\
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210 union\n\
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211 select\n\
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212 p.ppath || '/' || r.nodename,\n\
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213 r.*\n\
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214 from Resource r\n\
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215 inner join resolvepath p on r.parent_id = p.resource_id\n\
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216 )\n\
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217 select\n\
307
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218 case when r.resource_id = $1 then $2\n\
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219 else $2 || r.ppath\n\
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220 end as ppath,\n\
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221 r.resource_id,\n\
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222 r.parent_id,\n\
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223 r.nodename,\n\
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224 r.iscollection,\n\
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225 r.lastmodified,\n\
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226 r.creationdate,\n\
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227 r.contentlength,\n\
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228 p.prefix,\n\
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229 p.xmlns,\n\
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230 p.pname,\n\
317
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231 p.lang,\n\
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232 p.nsdeflist,\n\
306
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233 p.pvalue\n\
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234 from resolvepath r\n\
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235 left join (\n\
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236 select p.* from Property p\
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237 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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238 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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239 ) p on r.resource_id = p.resource_id\n\
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240 order by replace(ppath, '/', chr(1)), resource_id;";
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241
318
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242 // proppatch: set property
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243 // params: $1: resource_id
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244 // $2: xmlns prefix
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245 // $3: xmlns href
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246 // $4: property name
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247 // $5: lang attribute value
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248 // $6: namespace list string
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249 // $7: property value
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250 static const char *sql_proppatch_set = "\
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251 insert into Property(resource_id, prefix, xmlns, pname, lang, nsdeflist, pvalue)\n\
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252 values($1, $2, $3, $4, $5, $6, $7)\n\
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253 on conflict (resource_id, xmlns, pname) do\n\
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254 update set prefix=$2, lang=$5, nsdeflist=$6, pvalue=$7;";
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255
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256 // proppatch: remove property
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257 // params: $1: resource_id
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258 // $2: xmlns href
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259 // $3: property name
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260 static const char *sql_proppatch_remove = "\
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261 delete from Property where resource_id = $1 and xmlns = $2 and pname = $3";
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262
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263
303
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264 WebdavBackend* pg_webdav_create(Session *sn, Request *rq, pblock *pb) {
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265 // resourcepool is required
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266 char *resource_pool = pblock_findval("resourcepool", pb);
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267 if(!resource_pool) {
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268 log_ereport(LOG_MISCONFIG, "pg_webdav_create: missing resourcepool parameter");
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269 return NULL;
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270 }
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271
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272 // get the resource first (should only fail in case of misconfig)
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273 ResourceData *resdata = resourcepool_lookup(sn, rq, resource_pool, 0);
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274 if(!resdata) {
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275 log_ereport(LOG_MISCONFIG, "postgresql webdav: resource pool %s not found", resource_pool);
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276 return NULL;
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277 }
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278
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279 return pg_webdav_create_from_resdata(sn, rq, resdata);
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280 }
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281
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282 WebdavBackend* pg_webdav_create_from_resdata(Session *sn, Request *rq, ResourceData *resdata) {
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283 WebdavBackend *webdav = pool_malloc(sn->pool, sizeof(WebdavBackend));
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284 if(!webdav) {
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285 return NULL;
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286 }
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287 *webdav = pg_webdav_backend;
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288
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289 PgWebdavBackend *instance = pool_malloc(sn->pool, sizeof(PgWebdavBackend));
306
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290 if(!instance) {
303
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291 pool_free(sn->pool, webdav);
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292 return NULL;
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293 }
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294 webdav->instance = instance;
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295
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296 instance->pg_resource = resdata;
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297 instance->connection = resdata->data;
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298
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299 return webdav;
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300 }
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301
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302 WebdavBackend* pg_webdav_prop_create(Session *sn, Request *rq, pblock *pb) {
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303 return NULL;
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304 }
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305
315
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306 /*
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307 * adds str to the buffer
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308 * some characters will be escaped: \,{}
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309 */
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310 static void buf_addstr_escaped(UcxBuffer *buf, const char *str) {
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311 size_t len = strlen(str);
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312 for(size_t i=0;i<len;i++) {
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313 char c = str[i];
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314 if(c == '{' || c == '}' || c == ',' || c == '\\') {
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315 ucx_buffer_putc(buf, '\\');
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316 }
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317 ucx_buffer_putc(buf, c);
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318 }
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319 }
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320
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321 /*
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322 * convert a property list to two pg array parameter strings
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323 * array format: {elm1,elm2,elm3}
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324 * xmlns: buffer for the xmlns array
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325 * pname: buffer for the property name array
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326 *
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327 * returns 0 on success, 1 otherwise
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328 */
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329 int pg_create_property_param_arrays(WebdavPList *plist, UcxBuffer *xmlns, UcxBuffer *pname) {
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330 ucx_buffer_putc(xmlns, '{');
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331 ucx_buffer_putc(pname, '{');
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332 while(plist) {
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333 WebdavProperty *property = plist->property;
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334 if(property && property->namespace && property->namespace->href && property->name) {
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335 buf_addstr_escaped(xmlns, (const char*)property->namespace->href);
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336 buf_addstr_escaped(pname, (const char*)property->name);
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337 if(plist->next) {
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338 ucx_buffer_putc(xmlns, ',');
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339 ucx_buffer_putc(pname, ',');
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340 }
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341 }
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342 plist = plist->next;
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343 }
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344 int r1 = ucx_buffer_write("}\0", 2, 1, xmlns) == 0;
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345 int r2 = ucx_buffer_write("}\0", 2, 1, pname) == 0;
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346 return r1+r2 != 0;
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347 }
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348
303
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349
299
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350 int pg_dav_propfind_init(
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351 WebdavPropfindRequest *rq,
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352 const char *path,
307
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353 const char *href,
299
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354 WebdavPList **outplist)
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355 {
306
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356 PgWebdavBackend *pgdav = rq->dav->instance;
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357
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358 // check if the resource exists
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359 int64_t parent_id;
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360 int64_t resource_id;
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361 const char *resourcename;
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362 WSBool iscollection;
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363 int res_errno = 0;
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364 int err = pg_resolve_path(
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365 pgdav->connection,
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366 path,
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367 &parent_id,
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368 &resource_id,
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369 NULL, // OID
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370 &resourcename,
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371 &iscollection,
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372 NULL, // stat
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373 &res_errno);
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374
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375 if(err) {
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376 if(res_errno == ENOENT) {
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377 protocol_status(rq->sn, rq->rq, PROTOCOL_NOT_FOUND, NULL);
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378 }
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379 return 1;
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380 }
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381
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382 // choose sql query
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383 const char *query = NULL;
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384 if(!iscollection || rq->depth == 0) {
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385 query = rq->allprop ? sql_propfind_allprop_depth0 : sql_propfind_depth0;
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386 } else if(rq->depth == 1) {
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387 query = rq->allprop ? sql_propfind_allprop_depth1 : sql_propfind_depth1;
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388 } else if(rq->depth == -1) {
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389 query = rq->allprop ? sql_propfind_allprop_recursive : sql_propfind_recursive;
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390 } else {
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391 log_ereport(LOG_FAILURE, "%s", "pg_dav_propfind_init: invalid depth");
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392 return 1;
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393 }
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394
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395 // get all resources and properties
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396 char resource_id_str[32];
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397 snprintf(resource_id_str, 32, "%" PRId64, resource_id);
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398
307
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399 size_t href_len = strlen(href);
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400 char *href_param = pool_malloc(rq->sn->pool, href_len + 1);
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401 memcpy(href_param, href, href_len);
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402 if(href_param[href_len-1] == '/') {
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403 href_len--;
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404 }
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405 href_param[href_len] = '\0';
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406
315
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407 // if allprop is false, create array pair for xmlns/property names
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408 UcxBuffer *xmlns_buf = NULL;
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409 UcxBuffer *pname_buf = NULL;
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410 char *xmlns_param = NULL;
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411 char *pname_param = NULL;
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412 int nparam = 2;
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413 if(!rq->allprop) {
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414 size_t bufsize = rq->propcount < 200 ? 8 + rq->propcount * 32 : 4096;
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415 xmlns_buf = ucx_buffer_new(NULL, bufsize, UCX_BUFFER_AUTOEXTEND);
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416 if(!xmlns_buf) {
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417 return 1;
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418 }
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419 pname_buf = ucx_buffer_new(NULL, bufsize, UCX_BUFFER_AUTOEXTEND);
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420 if(!pname_buf) {
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421 ucx_buffer_free(xmlns_buf);
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422 return 1;
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423 }
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424 if(pg_create_property_param_arrays(rq->properties, xmlns_buf, pname_buf)) {
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425 ucx_buffer_free(xmlns_buf);
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426 ucx_buffer_free(pname_buf);
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427 return 1;
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428 }
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429 xmlns_param = xmlns_buf->space;
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430 pname_param = pname_buf->space;
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431 nparam = 4;
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432 }
307
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433
315
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434 const char* params[4] = { resource_id_str, href_param, xmlns_param, pname_param };
306
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435 PGresult *result = PQexecParams(
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436 pgdav->connection,
315
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437 query,
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438 nparam, // number of parameters
306
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439 NULL,
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440 params, // parameter value
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441 NULL,
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442 NULL,
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443 0); // 0: result in text format
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444 int nrows = PQntuples(result);
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445 pool_free(rq->sn->pool, href_param);
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446 if(xmlns_buf) {
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447 ucx_buffer_free(xmlns_buf);
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448 ucx_buffer_free(pname_buf);
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449 }
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450 if(nrows < 1) {
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451 PQclear(result);
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452 return 1;
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453 }
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454
300
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455 PgPropfind *pg = pool_malloc(rq->sn->pool, sizeof(PgPropfind));
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456 rq->userdata = pg;
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457
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458 pg->path = path;
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459 pg->resource_id = resource_id;
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460 pg->vfsproperties = webdav_vfs_properties(outplist, TRUE, 0);
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461 pg->result = result;
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462 pg->nrows = nrows;
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463
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464 return 0;
299
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465 }
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466
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467 int pg_dav_propfind_do(
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468 WebdavPropfindRequest *rq,
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469 WebdavResponse *response,
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470 VFS_DIR parent,
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471 WebdavResource *resource,
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472 struct stat *s)
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473 {
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474 PgPropfind *pg = rq->userdata;
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475 pool_handle_t *pool = rq->sn->pool;
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476 PGresult *result = pg->result;
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477 WebdavVFSProperties vfsprops = pg->vfsproperties;
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478
313
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479 WSBool vfsprops_set = 0; // are live properties added to the response?
306
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480 int64_t current_resource_id = pg->resource_id;
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481 for(int r=0;r<pg->nrows;r++) {
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482 // columns:
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483 // 0: path
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484 // 1: resource_id
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485 // 2: parent_id
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486 // 3: nodename
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487 // 4: iscollection
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488 // 5: lastmodified
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489 // 6: creationdate
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490 // 7: contentlength
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491 // 8: property prefix
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492 // 9: property xmlns
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493 // 10: property name
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494 // 11: property lang
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495 // 12: property nsdeflist
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496 // 13: property value
306
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497
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498 char *path = PQgetvalue(result, r, 0);
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499 char *res_id = PQgetvalue(result, r, 1);
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500 char *iscollection_str = PQgetvalue(result, r, 4);
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501 WSBool iscollection = iscollection_str && iscollection_str[0] == 't';
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502 int64_t resource_id;
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503 if(!util_strtoint(res_id, &resource_id)) {
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504 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: cannot convert resource_id '%s' to int", res_id);
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505 return 1;
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506 }
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507
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508 if(resource_id != current_resource_id) {
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509 // create a href string for the new resource
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510 // if the resource is a collection, it should have a trailing '/'
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511 size_t pathlen = strlen(path);
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512 if(pathlen == 0) {
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513 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: query returned invalid path");
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514 return 1;
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515 }
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516 char *newres_href = pool_malloc(pool, pathlen+2);
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517 memcpy(newres_href, path, pathlen);
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518 if(iscollection && path[pathlen-1] != '/') {
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519 newres_href[pathlen++] = '/';
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520 }
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521 newres_href[pathlen] = '\0';
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522
306
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523 // new resource
307
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524 resource = response->addresource(response, newres_href);
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525 vfsprops_set = FALSE;
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526 current_resource_id = resource_id;
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527 }
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528
313
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529 // standard webdav live properties
306
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530 if(!vfsprops_set) {
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531 if(vfsprops.getresourcetype) {
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532 if(iscollection) {
306
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533 resource->addproperty(resource, webdav_resourcetype_collection(), 200);
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534 } else {
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535 resource->addproperty(resource, webdav_resourcetype_empty(), 200);
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536 }
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537 }
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538 if(vfsprops.getlastmodified) {
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539 char *lastmodified = PQgetvalue(result, r, 5);
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540 time_t t = pg_convert_timestamp(lastmodified);
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diff changeset
541 struct tm tm;
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542 gmtime_r(&t, &tm);
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543
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544 char buf[HTTP_DATE_LEN+1];
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545 strftime(buf, HTTP_DATE_LEN, HTTP_DATE_FMT, &tm);
314
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546 webdav_resource_add_dav_stringproperty(resource, pool, "getlastmodified", buf, strlen(buf));
306
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547 }
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548 if(vfsprops.creationdate) {
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549 char *creationdate = PQgetvalue(result, r, 6);
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550 webdav_resource_add_dav_stringproperty(resource, pool, "creationdate", creationdate, strlen(creationdate));
306
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551 }
314
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552 if(vfsprops.getcontentlength && !iscollection) {
306
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553 char *contentlength = PQgetvalue(result, r, 7);
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diff changeset
554 webdav_resource_add_dav_stringproperty(resource, pool, "getcontentlength", contentlength, strlen(contentlength));
306
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555 }
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556 if(vfsprops.getetag) {
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557
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558 }
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diff changeset
559
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560 vfsprops_set = TRUE;
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561 }
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562
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563 // dead properties
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564 if(!PQgetisnull(result, r, 9)) {
317
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565 char *prefix = PQgetvalue(result, r, 8);
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566 char *xmlns = PQgetvalue(result, r, 9);
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567 char *pname = PQgetvalue(result, r, 10);
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568 char *lang = PQgetvalue(result, r, 11);
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569 char *nsdef = PQgetvalue(result, r, 12);
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570 char *pvalue = PQgetvalue(result, r, 13);
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571
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572 int pvalue_len = PQgetlength(result, r, 13);
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573 WSBool lang_isnull = PQgetisnull(result, r, 11);
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574 WSBool nsdef_isnull = PQgetisnull(result, r, 12);
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575 WSBool pvalue_isnull = PQgetisnull(result, r, 13);
306
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576
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577 WebdavProperty *property = pool_malloc(pool, sizeof(WebdavProperty));
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578 property->lang = NULL;
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579 property->name = pool_strdup(pool, pname);
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580
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581 xmlNs *namespace = pool_malloc(pool, sizeof(xmlNs));
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582 memset(namespace, 0, sizeof(struct _xmlNs));
307
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583 namespace->href = (xmlChar*)pool_strdup(pool, xmlns);
317
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584 namespace->prefix = (xmlChar*)pool_strdup(pool, prefix);
306
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585 property->namespace = namespace;
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586
317
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587 if(!lang_isnull) {
318
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588 property->lang = pool_strdup(pool, lang);
317
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589 }
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590
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591 if(!pvalue_isnull) {
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592 char *content = pool_malloc(pool, pvalue_len+1);
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593 memcpy(content, pvalue, pvalue_len);
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594 content[pvalue_len] = '\0';
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595
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596 if(nsdef_isnull) {
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597 property->vtype = WS_VALUE_TEXT;
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598 property->value.text.str = content;
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599 property->value.text.length = pvalue_len;
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600 } else {
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601 // TODO
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602 }
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603 }
306
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604
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605 resource->addproperty(resource, property, 200);
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606 }
313
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607 }
306
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608
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609 return 0;
299
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610 }
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611
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612 int pg_dav_propfind_finish(WebdavPropfindRequest *rq) {
312
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613 PgPropfind *pg = rq->userdata;
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614 pool_handle_t *pool = rq->sn->pool;
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615 PGresult *result = pg->result;
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616
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617 PQclear(result);
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618
306
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619 return 0;
299
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620 }
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621
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622 enum PgDavProp {
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623 PG_DAV_PROPPATCH_NOT_ALLOWED = 0,
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624 PG_DAV_CREATIONDATE,
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625 PG_DAV_DISPLAYNAME,
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626 PG_DAV_DEADPROP
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627 };
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628 /*
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629 * checks if the property can be manipulated
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630 */
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631 static enum PgDavProp proppatch_check_dav_prop(const char *name) {
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632 if(!strcmp(name, "getlastmodified")) {
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633 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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634 } else if(!strcmp(name, "getcontentlength")) {
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635 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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636 } else if(!strcmp(name, "resourcetype")) {
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637 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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638 } else if(!strcmp(name, "getetag")) {
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639 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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640 } else if(!strcmp(name, "creationdate")) {
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641 return PG_DAV_CREATIONDATE;
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642 } else if(!strcmp(name, "displayname")) {
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643 return PG_DAV_DISPLAYNAME;
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644 }
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645 return PG_DAV_DEADPROP;
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646 }
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647
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648 typedef struct {
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649 WebdavProperty *creationdate;
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650 WebdavProperty *displayname;
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651 int error;
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652 } PgProppatchOpResult;
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653
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654 typedef int(*pg_proppatch_func)(PgWebdavBackend*, WebdavProppatchRequest*, WebdavResource*, WebdavProperty*, void*);
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655
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656 /*
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657 * This function iterates the property list 'plist',
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658 * analyses if any DAV: property is in the list
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659 * and calls opfunc for the each property
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660 *
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661 * If the property list contains the properties creationdate or displayname,
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662 * the pointers to these properties will be stored in the result structure
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663 */
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664 static PgProppatchOpResult pg_proppatch_op(
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665 PgWebdavBackend *pgdav,
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666 WebdavProppatchRequest *request,
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667 WebdavResource *response,
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668 WebdavPList **plist,
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669 enum PgDavProp forbidden_extra,
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670 pg_proppatch_func opfunc,
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671 void *op_userdata)
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672 {
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673 PgProppatchOpResult result;
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674 result.creationdate = NULL;
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675 result.displayname = NULL;
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676 result.error = 0;
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677
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678 WebdavPListIterator i = webdav_plist_iterator(plist);
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679 WebdavPList *cur;
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680 while(webdav_plist_iterator_next(&i, &cur)) {
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681 WebdavProperty *property = cur->property;
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682 WSNamespace *ns = property->namespace;
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683 if(!ns) {
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684 continue; // maybe we should abort
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685 }
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686
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687 // check if the property is a DAV: property that requires special
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688 // handling
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689 // get* properties can't be manipulated
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690 // some properties can't be removed
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691 if(!strcmp((const char*)ns->href, "DAV:")) {
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692 const char *name = property->name;
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693 enum PgDavProp davprop = proppatch_check_dav_prop(name);
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694 if(davprop != PG_DAV_DEADPROP) {
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695 if(davprop == PG_DAV_PROPPATCH_NOT_ALLOWED || davprop == forbidden_extra) {
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696 response->addproperty(response, property, 409);
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697 } else if(davprop == PG_DAV_CREATIONDATE) {
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698 result.creationdate = property;
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699 } else if(davprop == PG_DAV_DISPLAYNAME) {
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700 result.displayname = property;
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701 }
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702 webdav_plist_iterator_remove_current(&i);
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703 continue;
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704 }
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705 }
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706
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707 // call op func (set, remove specific code)
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708 if(opfunc(pgdav, request, response, property, op_userdata)) {
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709 result.error = 1;
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710 break;
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711 }
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712
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713 webdav_plist_iterator_remove_current(&i);
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714 }
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715
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716 return result;
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717 }
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718
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719 static int pg_dav_set_property(
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720 PgWebdavBackend *pgdav,
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721 WebdavProppatchRequest *request,
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722 WebdavResource *response,
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723 WebdavProperty *property,
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724 void *userdata)
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725 {
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726 pool_handle_t *pool = request->sn->pool;
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727 WSNamespace *ns = property->namespace;
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728 char *resource_id_str = userdata;
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729 int ret = 0;
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730
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731 // convert the property value to WSXmlData
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732 // property->vtype == WS_VALUE_XML_NODE should always be true
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733 WSXmlData *property_value = property->vtype == WS_VALUE_XML_NODE ? wsxml_node2data(pool, property->value.node) : NULL;
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734 char *value_str = property_value ? property_value->data : NULL;
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735
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736 // TODO: convert WebdavNSList to a string
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737
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738 // exec sql
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739 const char* params[7] = { resource_id_str, (const char*)ns->prefix, (const char*)ns->href, property->name, NULL, NULL, value_str};
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740 PGresult *result = PQexecParams(
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741 pgdav->connection,
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742 sql_proppatch_set,
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743 7, // number of parameters
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744 NULL,
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745 params, // parameter value
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746 NULL,
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747 NULL,
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748 0); // 0: result in text format
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749
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750 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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751 response->addproperty(response, property, 500);
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752 //printf(PQerrorMessage(pgdav->connection));
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753 //fflush(stdout);
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754 ret = 1;
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755 } else {
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756 response->addproperty(response, property, 200);
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757 }
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758 PQclear(result);
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759 if(value_str) pool_free(pool, value_str);
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760
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761 return ret;
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762 }
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763
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764
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765 static int pg_dav_remove_property(
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766 PgWebdavBackend *pgdav,
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767 WebdavProppatchRequest *request,
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768 WebdavResource *response,
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769 WebdavProperty *property,
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770 void *userdata)
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771 {
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772 pool_handle_t *pool = request->sn->pool;
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773 WSNamespace *ns = property->namespace;
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774 char *resource_id_str = userdata;
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775 int ret = 0;
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776
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777 // exec sql
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778 const char* params[3] = { resource_id_str, (const char*)ns->href, property->name };
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779 PGresult *result = PQexecParams(
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780 pgdav->connection,
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781 sql_proppatch_remove,
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782 3, // number of parameters
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783 NULL,
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784 params, // parameter value
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785 NULL,
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786 NULL,
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787 0); // 0: result in text format
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788
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789 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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790 response->addproperty(response, property, 500);
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791 //printf(PQerrorMessage(pgdav->connection));
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792 //fflush(stdout);
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793 ret = 1;
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794 }
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795 PQclear(result);
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796
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797 return ret;
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798 }
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799
299
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800 int pg_dav_proppatch_do(
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801 WebdavProppatchRequest *request,
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parents:
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802 WebdavResource *response,
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parents:
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803 VFSFile *file,
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parents:
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804 WebdavPList **out_set,
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805 WebdavPList **out_remove)
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806 {
318
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807 PgWebdavBackend *pgdav = request->dav->instance;
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808 pool_handle_t *pool = request->sn->pool;
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809 char *path = pblock_findkeyval(pb_key_path, request->rq->vars);
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810
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811 // check if the resource exists, we also need the resource_id
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812 int64_t parent_id;
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813 int64_t resource_id;
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814 const char *resourcename;
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815 WSBool iscollection;
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816 int res_errno = 0;
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817 int err = pg_resolve_path(
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818 pgdav->connection,
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819 path,
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820 &parent_id,
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821 &resource_id,
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822 NULL, // OID
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823 &resourcename,
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824 &iscollection,
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825 NULL, // stat
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826 &res_errno);
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827
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828 if(err) {
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829 return 1;
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830 }
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831
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832 // because proppatch must be atomic and we have multiple sql
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833 // queries and other backends that do stuff that could fail
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834 // we need the possibility to reverse all changes
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835 // we use a transaction savepoint for this
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836 PGresult *result = PQexec(pgdav->connection, "savepoint proppatch;");
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837 ExecStatusType execStatus = PQresultStatus(result);
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838 PQclear(result);
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839 if(execStatus != PGRES_COMMAND_OK) {
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840 return 1;
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841 }
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842
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843 char resource_id_str[32];
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844 snprintf(resource_id_str, 32, "%" PRId64, resource_id);
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845
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846 int ret = 0;
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847 PgProppatchOpResult set_res = pg_proppatch_op(
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848 pgdav,
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849 request,
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850 response,
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851 out_set,
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852 PG_DAV_PROPPATCH_NOT_ALLOWED,
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853 pg_dav_set_property,
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854 resource_id_str);
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855 if(set_res.error) {
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856 return 1;
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857 }
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858 PgProppatchOpResult rm_res = pg_proppatch_op(
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859 pgdav,
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diff changeset
860 request,
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861 response,
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862 out_remove,
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863 PG_DAV_CREATIONDATE, // creationdate can't be removed
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864 pg_dav_remove_property,
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865 resource_id_str);
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866 if(rm_res.error) {
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867 return 1;
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868 }
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869
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870 return ret;
299
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parents:
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871 }
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parents:
diff changeset
872
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parents:
diff changeset
873 int pg_dav_proppatch_finish(
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874 WebdavProppatchRequest *request,
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875 WebdavResource *response,
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876 VFSFile *file,
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877 WSBool commit)
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878 {
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879 PgWebdavBackend *pgdav = request->dav->instance;
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880 int ret = 0;
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881 if(!commit) {
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882 PGresult *result = PQexec(pgdav->connection, "rollback to savepoint proppatch;");
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883 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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884 log_ereport(LOG_FAILURE, "pg_dav_proppatch_finish: rollback failed: %s", PQerrorMessage(pgdav->connection));
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885 ret = 1;
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886 }
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887 PQclear(result);
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888 }
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889 return ret;
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890 }

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