src/server/plugins/postgresql/webdav.c

Fri, 13 May 2022 21:24:45 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Fri, 13 May 2022 21:24:45 +0200
branch
webdav
changeset 354
017eda1be105
parent 348
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child 356
eebc3d32c7c1
permissions
-rw-r--r--

add missing HttpStream initializations
add some verbose logging to catch a bug

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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 "../../daemon/http.h" // etag
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36
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37 #include <ucx/buffer.h>
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38 #include <libxml/tree.h>
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39
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40
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41 static WebdavBackend pg_webdav_backend = {
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42 pg_dav_propfind_init,
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43 pg_dav_propfind_do,
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44 pg_dav_propfind_finish,
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45 pg_dav_proppatch_do,
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46 pg_dav_proppatch_finish,
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47 NULL, // opt_mkcol
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48 NULL, // opt_mkcol_finish
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49 NULL, // opt_delete
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50 NULL, // opt_delete_finish
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51 0,
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52 NULL,
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53 NULL
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54 };
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55
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56
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57 /*
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58 * SQL Queries
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59 */
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60
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61 // propfind with depth = 0
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62 // params: $1: resource_id
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63 static const char *sql_propfind_allprop_depth0 = "\
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64 select\n\
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65 $2::text as ppath,\n\
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66 r.resource_id,\n\
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67 r.parent_id,\n\
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68 r.nodename,\n\
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69 r.iscollection,\n\
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70 r.lastmodified,\n\
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71 r.creationdate,\n\
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72 r.contentlength,\n\
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73 r.etag,\n\
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74 p.prefix,\n\
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75 p.xmlns,\n\
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76 p.pname,\n\
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77 p.lang,\n\
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78 p.nsdeflist,\n\
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79 p.pvalue\n\
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80 from Resource r\n\
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81 left join Property p on r.resource_id = p.resource_id\n\
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82 where r.resource_id = $1;";
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83
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84 // propfind with depth = 0 for specific properties
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85 // params: $1: resource_id
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86 static const char *sql_propfind_depth0 = "\
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87 select\n\
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88 $2::text as ppath,\n\
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89 r.resource_id,\n\
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90 r.parent_id,\n\
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91 r.nodename,\n\
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92 r.iscollection,\n\
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93 r.lastmodified,\n\
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94 r.creationdate,\n\
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95 r.contentlength,\n\
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96 r.etag,\n\
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97 p.prefix,\n\
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98 p.xmlns,\n\
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99 p.pname,\n\
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100 p.lang,\n\
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101 p.nsdeflist,\n\
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102 p.pvalue\n\
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103 from Resource r\n\
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104 left join (\n\
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105 select p.* from Property p\
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106 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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107 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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108 ) p on r.resource_id = p.resource_id\n\
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109 where r.resource_id = $1;";
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110
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111 // propfind with depth = 1
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112 // params: $1: resource_id
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113 static const char *sql_propfind_allprop_depth1 = "\
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114 select\n\
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115 case when r.resource_id = $1 then $2\n\
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116 else $2 || '/' || r.nodename\n\
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117 end as ppath,\n\
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118 r.resource_id,\n\
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119 r.parent_id,\n\
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120 r.nodename,\n\
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121 r.iscollection,\n\
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122 r.lastmodified,\n\
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123 r.creationdate,\n\
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124 r.contentlength,\n\
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125 r.etag,\n\
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126 p.prefix,\n\
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127 p.xmlns,\n\
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128 p.pname,\n\
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129 p.lang,\n\
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130 p.nsdeflist,\n\
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131 p.pvalue\n\
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132 from Resource r\n\
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133 left join Property p on r.resource_id = p.resource_id\n\
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134 where r.resource_id = $1 or r.parent_id = $1\n\
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135 order by case when r.resource_id = $1 then 0 else 1 end, nodename, resource_id;";
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136
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137
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138 // propfind with depth = 1 for specific properties
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139 // params: $1: resource_id
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140 static const char *sql_propfind_depth1 = "\
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141 select\n\
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142 case when r.resource_id = $1 then $2\n\
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143 else $2 || '/' || r.nodename\n\
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144 end as ppath,\n\
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145 r.resource_id,\n\
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146 r.parent_id,\n\
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147 r.nodename,\n\
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148 r.iscollection,\n\
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149 r.lastmodified,\n\
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150 r.creationdate,\n\
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151 r.contentlength,\n\
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152 r.etag,\n\
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153 p.prefix,\n\
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154 p.xmlns,\n\
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155 p.pname,\n\
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156 p.lang,\n\
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157 p.nsdeflist,\n\
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158 p.pvalue\n\
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159 from Resource r\n\
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160 left join (\n\
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161 select p.* from Property p\
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162 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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163 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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164 ) p on r.resource_id = p.resource_id\n\
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165 where r.resource_id = $1 or r.parent_id = $1\n\
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166 order by case when r.resource_id = $1 then 0 else 1 end, nodename, resource_id;";
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167
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168 // recursive propfind
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169 // params: $1: resource_id
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170 static const char *sql_propfind_allprop_recursive = "\
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171 with recursive resolvepath as (\n\
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172 select\n\
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173 '' as ppath,\n\
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174 *\n\
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175 from Resource\n\
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176 where resource_id = $1 \n\
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177 union\n\
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178 select\n\
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179 p.ppath || '/' || r.nodename,\n\
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180 r.*\n\
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181 from Resource r\n\
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182 inner join resolvepath p on r.parent_id = p.resource_id\n\
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183 )\n\
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184 select\n\
307
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185 case when r.resource_id = $1 then $2\n\
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186 else $2 || r.ppath\n\
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187 end as ppath,\n\
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188 r.resource_id,\n\
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189 r.parent_id,\n\
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190 r.nodename,\n\
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191 r.iscollection,\n\
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192 r.lastmodified,\n\
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193 r.creationdate,\n\
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194 r.contentlength,\n\
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195 r.etag,\n\
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196 p.prefix,\n\
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197 p.xmlns,\n\
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198 p.pname,\n\
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199 p.lang,\n\
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200 p.nsdeflist,\n\
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201 p.pvalue\n\
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202 from resolvepath r\n\
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203 left join Property p on r.resource_id = p.resource_id\n\
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204 order by replace(ppath, '/', chr(1)), resource_id;";
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205
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206 // recursive propfind for specific properties
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207 // params: $1: resource_id
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208 // $2: array of property xmlns
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209 // $3: array of property names
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210 static const char *sql_propfind_recursive = "\
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211 with recursive resolvepath as (\n\
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212 select\n\
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213 '' as ppath,\n\
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214 *\n\
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215 from Resource\n\
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216 where resource_id = $1 \n\
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217 union\n\
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218 select\n\
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219 p.ppath || '/' || r.nodename,\n\
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220 r.*\n\
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221 from Resource r\n\
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222 inner join resolvepath p on r.parent_id = p.resource_id\n\
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223 )\n\
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224 select\n\
307
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225 case when r.resource_id = $1 then $2\n\
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226 else $2 || r.ppath\n\
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227 end as ppath,\n\
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228 r.resource_id,\n\
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229 r.parent_id,\n\
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230 r.nodename,\n\
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231 r.iscollection,\n\
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232 r.lastmodified,\n\
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233 r.creationdate,\n\
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234 r.contentlength,\n\
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235 r.etag,\n\
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236 p.prefix,\n\
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237 p.xmlns,\n\
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238 p.pname,\n\
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239 p.lang,\n\
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240 p.nsdeflist,\n\
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241 p.pvalue\n\
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242 from resolvepath r\n\
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243 left join (\n\
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244 select p.* from Property p\
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245 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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246 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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247 ) p on r.resource_id = p.resource_id\n\
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248 order by replace(ppath, '/', chr(1)), resource_id;";
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249
318
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250 // proppatch: set property
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251 // params: $1: resource_id
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252 // $2: xmlns prefix
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253 // $3: xmlns href
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254 // $4: property name
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255 // $5: lang attribute value
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256 // $6: namespace list string
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257 // $7: property value
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258 static const char *sql_proppatch_set = "\
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259 insert into Property(resource_id, prefix, xmlns, pname, lang, nsdeflist, pvalue)\n\
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260 values($1, $2, $3, $4, $5, $6, $7)\n\
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261 on conflict (resource_id, xmlns, pname) do\n\
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262 update set prefix=$2, lang=$5, nsdeflist=$6, pvalue=$7;";
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263
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264 // proppatch: remove property
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265 // params: $1: resource_id
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266 // $2: xmlns href
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267 // $3: property name
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268 static const char *sql_proppatch_remove = "\
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269 delete from Property where resource_id = $1 and xmlns = $2 and pname = $3";
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270
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271
303
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272 WebdavBackend* pg_webdav_create(Session *sn, Request *rq, pblock *pb) {
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273 // resourcepool is required
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274 char *resource_pool = pblock_findval("resourcepool", pb);
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275 if(!resource_pool) {
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276 log_ereport(LOG_MISCONFIG, "pg_webdav_create: missing resourcepool parameter");
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277 return NULL;
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278 }
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279
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280 // get the resource first (should only fail in case of misconfig)
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281 ResourceData *resdata = resourcepool_lookup(sn, rq, resource_pool, 0);
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282 if(!resdata) {
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283 log_ereport(LOG_MISCONFIG, "postgresql webdav: resource pool %s not found", resource_pool);
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284 return NULL;
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285 }
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286
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287 return pg_webdav_create_from_resdata(sn, rq, resdata);
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288 }
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289
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290 WebdavBackend* pg_webdav_create_from_resdata(Session *sn, Request *rq, ResourceData *resdata) {
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291 WebdavBackend *webdav = pool_malloc(sn->pool, sizeof(WebdavBackend));
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292 if(!webdav) {
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293 return NULL;
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294 }
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295 *webdav = pg_webdav_backend;
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296
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297 PgWebdavBackend *instance = pool_malloc(sn->pool, sizeof(PgWebdavBackend));
306
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298 if(!instance) {
303
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299 pool_free(sn->pool, webdav);
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300 return NULL;
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301 }
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302 webdav->instance = instance;
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303
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304 instance->pg_resource = resdata;
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305 instance->connection = resdata->data;
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306
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307 return webdav;
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308 }
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309
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310 WebdavBackend* pg_webdav_prop_create(Session *sn, Request *rq, pblock *pb) {
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311 return NULL;
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312 }
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313
315
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314 /*
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315 * adds str to the buffer
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316 * some characters will be escaped: \,{}
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317 */
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318 static void buf_addstr_escaped(UcxBuffer *buf, const char *str) {
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319 size_t len = strlen(str);
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320 for(size_t i=0;i<len;i++) {
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321 char c = str[i];
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322 if(c == '{' || c == '}' || c == ',' || c == '\\') {
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323 ucx_buffer_putc(buf, '\\');
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324 }
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325 ucx_buffer_putc(buf, c);
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326 }
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327 }
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328
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329 /*
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330 * convert a property list to two pg array parameter strings
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331 * array format: {elm1,elm2,elm3}
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332 * xmlns: buffer for the xmlns array
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333 * pname: buffer for the property name array
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334 *
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335 * returns 0 on success, 1 otherwise
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336 */
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337 int pg_create_property_param_arrays(WebdavPList *plist, UcxBuffer *xmlns, UcxBuffer *pname) {
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338 ucx_buffer_putc(xmlns, '{');
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339 ucx_buffer_putc(pname, '{');
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340 while(plist) {
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341 WebdavProperty *property = plist->property;
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342 if(property && property->namespace && property->namespace->href && property->name) {
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343 buf_addstr_escaped(xmlns, (const char*)property->namespace->href);
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344 buf_addstr_escaped(pname, (const char*)property->name);
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345 if(plist->next) {
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346 ucx_buffer_putc(xmlns, ',');
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347 ucx_buffer_putc(pname, ',');
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348 }
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349 }
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350 plist = plist->next;
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351 }
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352 int r1 = ucx_buffer_write("}\0", 2, 1, xmlns) == 0;
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353 int r2 = ucx_buffer_write("}\0", 2, 1, pname) == 0;
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354 return r1+r2 != 0;
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355 }
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356
303
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357
299
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358 int pg_dav_propfind_init(
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359 WebdavPropfindRequest *rq,
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360 const char *path,
307
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361 const char *href,
299
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362 WebdavPList **outplist)
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363 {
306
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364 PgWebdavBackend *pgdav = rq->dav->instance;
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365
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366 // check if the resource exists
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367 int64_t parent_id;
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368 int64_t resource_id;
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369 const char *resourcename;
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370 WSBool iscollection;
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371 int res_errno = 0;
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372 int err = pg_resolve_path(
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373 pgdav->connection,
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374 path,
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375 &parent_id,
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376 &resource_id,
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377 NULL, // OID
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378 &resourcename,
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379 &iscollection,
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380 NULL, // stat
346
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381 NULL, // etag
306
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382 &res_errno);
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383
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384 if(err) {
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385 if(res_errno == ENOENT) {
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386 protocol_status(rq->sn, rq->rq, PROTOCOL_NOT_FOUND, NULL);
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387 }
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388 return 1;
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389 }
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390
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391 // choose sql query
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392 const char *query = NULL;
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393 if(!iscollection || rq->depth == 0) {
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394 query = rq->allprop ? sql_propfind_allprop_depth0 : sql_propfind_depth0;
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395 } else if(rq->depth == 1) {
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396 query = rq->allprop ? sql_propfind_allprop_depth1 : sql_propfind_depth1;
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397 } else if(rq->depth == -1) {
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398 query = rq->allprop ? sql_propfind_allprop_recursive : sql_propfind_recursive;
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399 } else {
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400 log_ereport(LOG_FAILURE, "%s", "pg_dav_propfind_init: invalid depth");
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401 return 1;
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402 }
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403
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404 // get all resources and properties
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405 char resource_id_str[32];
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406 snprintf(resource_id_str, 32, "%" PRId64, resource_id);
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407
307
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408 size_t href_len = strlen(href);
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409 char *href_param = pool_malloc(rq->sn->pool, href_len + 1);
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410 memcpy(href_param, href, href_len);
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411 if(href_param[href_len-1] == '/') {
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412 href_len--;
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413 }
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414 href_param[href_len] = '\0';
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415
315
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416 // if allprop is false, create array pair for xmlns/property names
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417 UcxBuffer *xmlns_buf = NULL;
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418 UcxBuffer *pname_buf = NULL;
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419 char *xmlns_param = NULL;
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420 char *pname_param = NULL;
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421 int nparam = 2;
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422 if(!rq->allprop) {
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423 size_t bufsize = rq->propcount < 200 ? 8 + rq->propcount * 32 : 4096;
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424 xmlns_buf = ucx_buffer_new(NULL, bufsize, UCX_BUFFER_AUTOEXTEND);
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425 if(!xmlns_buf) {
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426 return 1;
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427 }
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428 pname_buf = ucx_buffer_new(NULL, bufsize, UCX_BUFFER_AUTOEXTEND);
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429 if(!pname_buf) {
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430 ucx_buffer_free(xmlns_buf);
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431 return 1;
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432 }
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433 if(pg_create_property_param_arrays(rq->properties, xmlns_buf, pname_buf)) {
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434 ucx_buffer_free(xmlns_buf);
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435 ucx_buffer_free(pname_buf);
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436 return 1;
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437 }
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438 xmlns_param = xmlns_buf->space;
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439 pname_param = pname_buf->space;
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440 nparam = 4;
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441 }
307
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442
315
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443 const char* params[4] = { resource_id_str, href_param, xmlns_param, pname_param };
306
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444 PGresult *result = PQexecParams(
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445 pgdav->connection,
315
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446 query,
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447 nparam, // number of parameters
306
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448 NULL,
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449 params, // parameter value
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450 NULL,
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451 NULL,
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452 0); // 0: result in text format
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453 int nrows = PQntuples(result);
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454 pool_free(rq->sn->pool, href_param);
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455 if(xmlns_buf) {
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456 ucx_buffer_free(xmlns_buf);
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457 ucx_buffer_free(pname_buf);
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458 }
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459 if(nrows < 1) {
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460 PQclear(result);
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461 return 1;
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462 }
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463
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464 PgPropfind *pg = pool_malloc(rq->sn->pool, sizeof(PgPropfind));
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465 rq->userdata = pg;
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466
306
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467 pg->path = path;
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468 pg->resource_id = resource_id;
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469 pg->vfsproperties = webdav_vfs_properties(outplist, TRUE, rq->allprop, 0);
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470 pg->result = result;
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471 pg->nrows = nrows;
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472
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473 return 0;
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474 }
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475
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476 int pg_dav_propfind_do(
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477 WebdavPropfindRequest *rq,
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478 WebdavResponse *response,
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479 VFS_DIR parent,
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480 WebdavResource *resource,
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481 struct stat *s)
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482 {
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483 PgPropfind *pg = rq->userdata;
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484 pool_handle_t *pool = rq->sn->pool;
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485 PGresult *result = pg->result;
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486 WebdavVFSProperties vfsprops = pg->vfsproperties;
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487
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488 WSBool vfsprops_set = 0; // are live properties added to the response?
306
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489 int64_t current_resource_id = pg->resource_id;
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490 for(int r=0;r<pg->nrows;r++) {
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491 // columns:
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492 // 0: path
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493 // 1: resource_id
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494 // 2: parent_id
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495 // 3: nodename
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496 // 4: iscollection
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497 // 5: lastmodified
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498 // 6: creationdate
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499 // 7: contentlength
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500 // 8: etag
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501 // 9: property prefix
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502 // 10: property xmlns
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503 // 11: property name
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504 // 12: property lang
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505 // 13: property nsdeflist
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506 // 14: property value
306
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507
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508 char *path = PQgetvalue(result, r, 0);
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509 char *res_id = PQgetvalue(result, r, 1);
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510 char *iscollection_str = PQgetvalue(result, r, 4);
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511 WSBool iscollection = iscollection_str && iscollection_str[0] == 't';
306
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512 int64_t resource_id;
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513 if(!util_strtoint(res_id, &resource_id)) {
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514 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: cannot convert resource_id '%s' to int", res_id);
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515 return 1;
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516 }
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517
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518 if(resource_id != current_resource_id) {
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519 // create a href string for the new resource
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520 // if the resource is a collection, it should have a trailing '/'
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521 size_t pathlen = strlen(path);
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522 if(pathlen == 0) {
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523 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: query returned invalid path");
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524 return 1;
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525 }
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526 char *newres_href = pool_malloc(pool, pathlen+2);
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527 memcpy(newres_href, path, pathlen);
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528 if(iscollection && path[pathlen-1] != '/') {
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529 newres_href[pathlen++] = '/';
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530 }
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531 newres_href[pathlen] = '\0';
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532
306
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533 // new resource
307
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534 resource = response->addresource(response, newres_href);
306
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535 vfsprops_set = FALSE;
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536 current_resource_id = resource_id;
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537 }
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538
313
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539 // standard webdav live properties
306
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540 if(!vfsprops_set) {
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541 if(vfsprops.getresourcetype) {
307
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542 if(iscollection) {
306
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543 resource->addproperty(resource, webdav_resourcetype_collection(), 200);
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544 } else {
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545 resource->addproperty(resource, webdav_resourcetype_empty(), 200);
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546 }
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547 }
348
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548
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549 char *lastmodified = PQgetvalue(result, r, 5);
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550 char *contentlength = PQgetvalue(result, r, 7);
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551 time_t t = pg_convert_timestamp(lastmodified);
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552
306
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553 if(vfsprops.getlastmodified) {
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554 struct tm tm;
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555 gmtime_r(&t, &tm);
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556
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557 char buf[HTTP_DATE_LEN+1];
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diff changeset
558 strftime(buf, HTTP_DATE_LEN, HTTP_DATE_FMT, &tm);
314
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559 webdav_resource_add_dav_stringproperty(resource, pool, "getlastmodified", buf, strlen(buf));
306
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560 }
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561 if(vfsprops.creationdate) {
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562 char *creationdate = PQgetvalue(result, r, 6);
311
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563 webdav_resource_add_dav_stringproperty(resource, pool, "creationdate", creationdate, strlen(creationdate));
306
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564 }
314
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565 if(vfsprops.getcontentlength && !iscollection) {
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566 webdav_resource_add_dav_stringproperty(resource, pool, "getcontentlength", contentlength, strlen(contentlength));
306
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567 }
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568 if(vfsprops.getetag) {
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569 char *etag = PQgetvalue(result, r, 8);
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diff changeset
570 if(!PQgetisnull(result, r, 8)) {
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571 webdav_resource_add_dav_stringproperty(resource, pool, "getetag", etag, strlen(etag));
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572 } else {
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573 int64_t ctlen;
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574 if(util_strtoint(contentlength, &ctlen)) {
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575 char etag[MAX_ETAG];
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576 http_format_etag(rq->sn, rq->rq, etag, MAX_ETAG, ctlen, t);
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577 webdav_resource_add_dav_stringproperty(resource, pool, "getetag", etag, strlen(etag));
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578 }
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579 }
306
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580 }
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581
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582 vfsprops_set = TRUE;
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583 }
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584
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585 // dead properties
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586 if(!PQgetisnull(result, r, 9)) {
348
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587 char *prefix = PQgetvalue(result, r, 9);
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588 char *xmlns = PQgetvalue(result, r, 10);
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589 char *pname = PQgetvalue(result, r, 11);
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590 char *lang = PQgetvalue(result, r, 12);
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591 char *nsdef = PQgetvalue(result, r, 13);
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592 char *pvalue = PQgetvalue(result, r, 14);
317
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593
348
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594 int pvalue_len = PQgetlength(result, r, 14);
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595 WSBool lang_isnull = PQgetisnull(result, r, 12);
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596 WSBool nsdef_isnull = PQgetisnull(result, r, 13);
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597 WSBool pvalue_isnull = PQgetisnull(result, r, 14);
306
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598
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599 WebdavProperty *property = pool_malloc(pool, sizeof(WebdavProperty));
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600 property->lang = NULL;
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601 property->name = pool_strdup(pool, pname);
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602
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603 xmlNs *namespace = pool_malloc(pool, sizeof(xmlNs));
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604 memset(namespace, 0, sizeof(struct _xmlNs));
307
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605 namespace->href = (xmlChar*)pool_strdup(pool, xmlns);
317
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606 namespace->prefix = (xmlChar*)pool_strdup(pool, prefix);
306
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607 property->namespace = namespace;
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608
317
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609 if(!lang_isnull) {
318
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610 property->lang = pool_strdup(pool, lang);
317
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611 }
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612
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613 if(!pvalue_isnull) {
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614 char *content = pool_malloc(pool, pvalue_len+1);
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615 memcpy(content, pvalue, pvalue_len);
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616 content[pvalue_len] = '\0';
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617
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618 if(nsdef_isnull) {
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619 property->vtype = WS_VALUE_TEXT;
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620 property->value.text.str = content;
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621 property->value.text.length = pvalue_len;
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622 } else {
324
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623 WebdavNSList *nslist = wsxml_string2nslist(pool, nsdef);
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624 property->vtype = WS_VALUE_XML_DATA;
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625 property->value.data->data = content;
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626 property->value.data->length = pvalue_len;
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627 property->value.data->namespaces = nslist;
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628
317
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629 }
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630 }
306
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631
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632 resource->addproperty(resource, property, 200);
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633 }
313
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634 }
306
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635
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636 return 0;
299
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637 }
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638
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639 int pg_dav_propfind_finish(WebdavPropfindRequest *rq) {
312
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640 PgPropfind *pg = rq->userdata;
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641 pool_handle_t *pool = rq->sn->pool;
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642 PGresult *result = pg->result;
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643
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644 PQclear(result);
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645
306
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646 return 0;
299
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647 }
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648
318
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649 enum PgDavProp {
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650 PG_DAV_PROPPATCH_NOT_ALLOWED = 0,
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651 PG_DAV_CREATIONDATE,
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652 PG_DAV_DISPLAYNAME,
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653 PG_DAV_DEADPROP
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654 };
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655 /*
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656 * checks if the property can be manipulated
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657 */
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658 static enum PgDavProp proppatch_check_dav_prop(const char *name) {
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659 if(!strcmp(name, "getlastmodified")) {
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660 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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661 } else if(!strcmp(name, "getcontentlength")) {
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662 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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663 } else if(!strcmp(name, "resourcetype")) {
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664 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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665 } else if(!strcmp(name, "getetag")) {
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666 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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667 } else if(!strcmp(name, "creationdate")) {
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668 return PG_DAV_CREATIONDATE;
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669 } else if(!strcmp(name, "displayname")) {
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670 return PG_DAV_DISPLAYNAME;
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671 }
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672 return PG_DAV_DEADPROP;
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673 }
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674
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675 typedef struct {
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676 WebdavProperty *creationdate;
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677 WebdavProperty *displayname;
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678 int error;
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679 } PgProppatchOpResult;
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680
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681 typedef int(*pg_proppatch_func)(PgWebdavBackend*, WebdavProppatchRequest*, WebdavResource*, WebdavProperty*, void*);
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682
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683 /*
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684 * This function iterates the property list 'plist',
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685 * analyses if any DAV: property is in the list
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686 * and calls opfunc for the each property
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687 *
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688 * If the property list contains the properties creationdate or displayname,
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689 * the pointers to these properties will be stored in the result structure
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690 */
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691 static PgProppatchOpResult pg_proppatch_op(
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692 PgWebdavBackend *pgdav,
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693 WebdavProppatchRequest *request,
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694 WebdavResource *response,
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695 WebdavPList **plist,
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696 enum PgDavProp forbidden_extra,
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697 pg_proppatch_func opfunc,
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698 void *op_userdata)
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699 {
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700 PgProppatchOpResult result;
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701 result.creationdate = NULL;
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702 result.displayname = NULL;
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703 result.error = 0;
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704
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705 WebdavPListIterator i = webdav_plist_iterator(plist);
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706 WebdavPList *cur;
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707 while(webdav_plist_iterator_next(&i, &cur)) {
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708 WebdavProperty *property = cur->property;
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709 WSNamespace *ns = property->namespace;
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710 if(!ns) {
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711 continue; // maybe we should abort
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712 }
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713
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714 // check if the property is a DAV: property that requires special
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715 // handling
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716 // get* properties can't be manipulated
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717 // some properties can't be removed
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718 if(!strcmp((const char*)ns->href, "DAV:")) {
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719 const char *name = property->name;
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720 enum PgDavProp davprop = proppatch_check_dav_prop(name);
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721 if(davprop != PG_DAV_DEADPROP) {
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722 if(davprop == PG_DAV_PROPPATCH_NOT_ALLOWED || davprop == forbidden_extra) {
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723 response->addproperty(response, property, 409);
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724 } else if(davprop == PG_DAV_CREATIONDATE) {
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725 result.creationdate = property;
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726 } else if(davprop == PG_DAV_DISPLAYNAME) {
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727 result.displayname = property;
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728 }
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729 webdav_plist_iterator_remove_current(&i);
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730 continue;
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731 }
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732 }
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diff changeset
733
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734 // call op func (set, remove specific code)
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735 if(opfunc(pgdav, request, response, property, op_userdata)) {
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736 result.error = 1;
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737 break;
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738 }
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739
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740 webdav_plist_iterator_remove_current(&i);
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741 }
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742
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743 return result;
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744 }
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745
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746 static int pg_dav_set_property(
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747 PgWebdavBackend *pgdav,
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748 WebdavProppatchRequest *request,
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749 WebdavResource *response,
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750 WebdavProperty *property,
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751 void *userdata)
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752 {
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753 pool_handle_t *pool = request->sn->pool;
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754 WSNamespace *ns = property->namespace;
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755 char *resource_id_str = userdata;
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756 int ret = 0;
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757
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758 // convert the property value to WSXmlData
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759 // property->vtype == WS_VALUE_XML_NODE should always be true
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760 WSXmlData *property_value = property->vtype == WS_VALUE_XML_NODE ? wsxml_node2data(pool, property->value.node) : NULL;
324
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761 char *value_str = NULL;
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762 char *nsdef_str = NULL;
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763 if(property_value) {
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diff changeset
764 value_str = property_value->data;
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765 if(property_value->namespaces) {
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766 nsdef_str = wsxml_nslist2string(pool, property_value->namespaces);
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767 if(!nsdef_str) {
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768 return 1; // OOM
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769 }
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770 }
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771 }
318
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772
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773 // exec sql
324
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774 const char* params[7] = { resource_id_str, (const char*)ns->prefix, (const char*)ns->href, property->name, NULL, nsdef_str, value_str};
318
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775 PGresult *result = PQexecParams(
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776 pgdav->connection,
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777 sql_proppatch_set,
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778 7, // number of parameters
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779 NULL,
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diff changeset
780 params, // parameter value
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diff changeset
781 NULL,
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diff changeset
782 NULL,
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783 0); // 0: result in text format
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784
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785 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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diff changeset
786 response->addproperty(response, property, 500);
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787 //printf(PQerrorMessage(pgdav->connection));
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788 //fflush(stdout);
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789 ret = 1;
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790 } else {
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791 response->addproperty(response, property, 200);
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792 }
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diff changeset
793 PQclear(result);
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794 if(value_str) pool_free(pool, value_str);
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795
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796 return ret;
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797 }
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diff changeset
798
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diff changeset
799
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800 static int pg_dav_remove_property(
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801 PgWebdavBackend *pgdav,
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802 WebdavProppatchRequest *request,
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803 WebdavResource *response,
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804 WebdavProperty *property,
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805 void *userdata)
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diff changeset
806 {
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diff changeset
807 pool_handle_t *pool = request->sn->pool;
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808 WSNamespace *ns = property->namespace;
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809 char *resource_id_str = userdata;
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diff changeset
810 int ret = 0;
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811
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812 // exec sql
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diff changeset
813 const char* params[3] = { resource_id_str, (const char*)ns->href, property->name };
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814 PGresult *result = PQexecParams(
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diff changeset
815 pgdav->connection,
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diff changeset
816 sql_proppatch_remove,
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817 3, // number of parameters
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diff changeset
818 NULL,
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diff changeset
819 params, // parameter value
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diff changeset
820 NULL,
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diff changeset
821 NULL,
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diff changeset
822 0); // 0: result in text format
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diff changeset
823
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diff changeset
824 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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diff changeset
825 response->addproperty(response, property, 500);
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826 //printf(PQerrorMessage(pgdav->connection));
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827 //fflush(stdout);
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828 ret = 1;
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829 }
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830 PQclear(result);
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diff changeset
831
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832 return ret;
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diff changeset
833 }
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diff changeset
834
299
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parents:
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835 int pg_dav_proppatch_do(
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parents:
diff changeset
836 WebdavProppatchRequest *request,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
837 WebdavResource *response,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
838 VFSFile *file,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
839 WebdavPList **out_set,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
840 WebdavPList **out_remove)
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parents:
diff changeset
841 {
318
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842 PgWebdavBackend *pgdav = request->dav->instance;
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843 pool_handle_t *pool = request->sn->pool;
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diff changeset
844 char *path = pblock_findkeyval(pb_key_path, request->rq->vars);
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diff changeset
845
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diff changeset
846 // check if the resource exists, we also need the resource_id
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diff changeset
847 int64_t parent_id;
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848 int64_t resource_id;
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diff changeset
849 const char *resourcename;
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diff changeset
850 WSBool iscollection;
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diff changeset
851 int res_errno = 0;
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diff changeset
852 int err = pg_resolve_path(
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diff changeset
853 pgdav->connection,
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854 path,
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855 &parent_id,
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diff changeset
856 &resource_id,
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diff changeset
857 NULL, // OID
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diff changeset
858 &resourcename,
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diff changeset
859 &iscollection,
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diff changeset
860 NULL, // stat
346
784b24381bed extend postgresql vfs to store an etag in the file
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diff changeset
861 NULL, // etag
318
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diff changeset
862 &res_errno);
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diff changeset
863
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diff changeset
864 if(err) {
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865 return 1;
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866 }
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867
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868 // because proppatch must be atomic and we have multiple sql
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869 // queries and other backends that do stuff that could fail
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870 // we need the possibility to reverse all changes
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871 // we use a transaction savepoint for this
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872 PGresult *result = PQexec(pgdav->connection, "savepoint proppatch;");
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873 ExecStatusType execStatus = PQresultStatus(result);
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874 PQclear(result);
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875 if(execStatus != PGRES_COMMAND_OK) {
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876 return 1;
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877 }
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878
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879 char resource_id_str[32];
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880 snprintf(resource_id_str, 32, "%" PRId64, resource_id);
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881
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882 int ret = 0;
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883 PgProppatchOpResult set_res = pg_proppatch_op(
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884 pgdav,
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885 request,
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886 response,
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887 out_set,
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888 PG_DAV_PROPPATCH_NOT_ALLOWED,
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889 pg_dav_set_property,
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890 resource_id_str);
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891 if(set_res.error) {
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892 return 1;
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893 }
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894 PgProppatchOpResult rm_res = pg_proppatch_op(
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895 pgdav,
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896 request,
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897 response,
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898 out_remove,
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899 PG_DAV_CREATIONDATE, // creationdate can't be removed
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900 pg_dav_remove_property,
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901 resource_id_str);
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902 if(rm_res.error) {
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903 return 1;
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904 }
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905
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906 return ret;
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907 }
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908
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909 int pg_dav_proppatch_finish(
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910 WebdavProppatchRequest *request,
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911 WebdavResource *response,
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912 VFSFile *file,
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913 WSBool commit)
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914 {
318
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915 PgWebdavBackend *pgdav = request->dav->instance;
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916 int ret = 0;
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917 if(!commit) {
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918 PGresult *result = PQexec(pgdav->connection, "rollback to savepoint proppatch;");
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919 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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920 log_ereport(LOG_FAILURE, "pg_dav_proppatch_finish: rollback failed: %s", PQerrorMessage(pgdav->connection));
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921 ret = 1;
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922 }
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923 PQclear(result);
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924 }
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925 return ret;
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926 }

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