src/server/plugins/postgresql/webdav.c

Sun, 14 Aug 2022 12:43:14 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 14 Aug 2022 12:43:14 +0200
branch
webdav
changeset 375
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parent 374
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child 376
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permissions
-rw-r--r--

build pg propfind query from components

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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 #include "config.h"
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33 #include "../../util/util.h"
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34 #include "../../util/pblock.h"
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35
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36 #include "../../daemon/http.h" // etag
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37
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38 #include <ucx/buffer.h>
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39 #include <libxml/tree.h>
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40
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41
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42 static WebdavBackend pg_webdav_backend = {
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43 pg_dav_propfind_init,
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44 pg_dav_propfind_do,
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45 pg_dav_propfind_finish,
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46 pg_dav_proppatch_do,
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47 pg_dav_proppatch_finish,
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48 NULL, // opt_mkcol
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49 NULL, // opt_mkcol_finish
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50 NULL, // opt_delete
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51 NULL, // opt_delete_finish
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52 0,
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53 NULL,
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54 NULL
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55 };
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56
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57
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58
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59 /*
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60 * SQL query components
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61 */
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62
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63 /*
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64 * PROPFIND queries are build from components:
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65 *
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66 * cte cte_recursive or empty
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67 * select
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68 * ppath ppath column
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69 * cols list of columns
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70 * ext_cols* list of extension columns
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71 * from from [table] / from cte
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72 * prop_join join with property table, allprop or plist
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73 * ext_join* extension table join
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74 * where different where clauses for depth0 and depth1
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75 * order depth0 doesn't need order
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76 */
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77
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78 static const char *sql_propfind_cte_recursive = "\
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79 with recursive resolvepath as (\n\
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80 select\n\
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81 '' as ppath,\n\
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82 *\n\
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83 from Resource\n\
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84 where resource_id = $1 \n\
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85 union\n\
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86 select\n\
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87 p.ppath || '/' || r.nodename,\n\
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88 r.*\n\
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89 from Resource r\n\
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90 inner join resolvepath p on r.parent_id = p.resource_id\n\
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91 )\n";
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92
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93 static const char *sql_propfind_select = "\
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94 select\n";
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95
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96 static const char *sql_propfind_ppath_depth0 = "\
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97 $2::text as ppath,\n";
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98
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99 static const char *sql_propfind_ppath_depth1 = "\
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100 case when r.resource_id = $1 then $2\n\
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101 else $2 || '/' || r.nodename\n\
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102 end as ppath,\n";
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103
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104 static const char *sql_propfind_ppath_depth_infinity = "\
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105 case when r.resource_id = $1 then $2\n\
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106 else $2 || r.ppath\n\
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107 end as ppath,\n";
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108
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109 static const char *sql_propfind_cols = "\
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110 r.resource_id,\n\
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111 r.parent_id,\n\
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112 r.nodename,\n\
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113 r.iscollection,\n\
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114 r.lastmodified,\n\
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115 r.creationdate,\n\
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116 r.contentlength,\n\
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117 r.etag,\n\
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118 p.prefix,\n\
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119 p.xmlns,\n\
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120 p.pname,\n\
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121 p.lang,\n\
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122 p.nsdeflist,\n\
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123 p.pvalue\n";
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124
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125 static const char *sql_propfind_from_table = "\
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126 from Resource r\n";
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127
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128 static const char *sql_propfind_from_cte = "\
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129 from resolvepath r\n";
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130
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131 static const char *sql_propfind_propjoin_allprop = "\
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132 left join Property p on r.resource_id = p.resource_id\n";
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133
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134 static const char *sql_propfind_propjoin_plist = "\
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135 left join (\n\
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136 select p.* from Property p\
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137 inner join (select unnest($3::text[]) as xmlns, unnest($4::text[]) as pname) n\n\
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138 on p.xmlns = n.xmlns and p.pname = n.pname\n\
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139 ) p on r.resource_id = p.resource_id\n";
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140
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141 static const char *sql_propfind_where_depth0 = "\
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142 where r.resource_id = $1\n";
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143
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144 static const char *sql_propfind_where_depth1 = "\
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145 where r.resource_id = $1 or r.parent_id = $1\n";
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146
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147 static const char *sql_propfind_order_depth1 = "\
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148 order by case when r.resource_id = $1 then 0 else 1 end, nodename, resource_id";
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149
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150 static const char *sql_propfind_order_depth_infinity = "\
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151 order by replace(ppath, '/', chr(1)), resource_id";
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152
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153 /*
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154 * SQL Queries
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155 */
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156
306
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157
318
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158 // proppatch: set property
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159 // params: $1: resource_id
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160 // $2: xmlns prefix
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161 // $3: xmlns href
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162 // $4: property name
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163 // $5: lang attribute value
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164 // $6: namespace list string
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165 // $7: property value
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166 static const char *sql_proppatch_set = "\
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167 insert into Property(resource_id, prefix, xmlns, pname, lang, nsdeflist, pvalue)\n\
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168 values($1, $2, $3, $4, $5, $6, $7)\n\
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169 on conflict (resource_id, xmlns, pname) do\n\
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170 update set prefix=$2, lang=$5, nsdeflist=$6, pvalue=$7;";
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171
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172 // proppatch: remove property
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173 // params: $1: resource_id
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174 // $2: xmlns href
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175 // $3: property name
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176 static const char *sql_proppatch_remove = "\
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177 delete from Property where resource_id = $1 and xmlns = $2 and pname = $3";
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178
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179
366
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180 void* pg_webdav_init(ServerConfiguration *cfg, pool_handle_t *pool, WSConfigNode *config) {
372
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181 return pg_init_repo(cfg, pool, config);
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182 }
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183
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184 WebdavBackend* pg_webdav_create(Session *sn, Request *rq, pblock *pb, void *initData) {
370
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185 PgRepository *repo = initData;
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186
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187 char *resource_pool;
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188 if(repo) {
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189 resource_pool = repo->resourcepool.ptr;
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190 } else {
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191 // resourcepool is required
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192 resource_pool = pblock_findval("resourcepool", pb);
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193 if(!resource_pool) {
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194 log_ereport(LOG_MISCONFIG, "pg_webdav_create: missing resourcepool parameter");
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195 return NULL;
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196 }
303
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197 }
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198
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199 // get the resource first (should only fail in case of misconfig)
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200 ResourceData *resdata = resourcepool_lookup(sn, rq, resource_pool, 0);
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201 if(!resdata) {
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202 log_ereport(LOG_MISCONFIG, "postgresql webdav: resource pool %s not found", resource_pool);
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203 return NULL;
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204 }
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205
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206 return pg_webdav_create_from_resdata(sn, rq, repo, resdata);
303
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207 }
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208
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209 WebdavBackend* pg_webdav_create_from_resdata(Session *sn, Request *rq, PgRepository *repo, ResourceData *resdata) {
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210 WebdavBackend *webdav = pool_malloc(sn->pool, sizeof(WebdavBackend));
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211 if(!webdav) {
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212 return NULL;
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213 }
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214 *webdav = pg_webdav_backend;
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215
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216 PgWebdavBackend *instance = pool_malloc(sn->pool, sizeof(PgWebdavBackend));
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217 if(!instance) {
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218 pool_free(sn->pool, webdav);
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219 return NULL;
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220 }
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221 webdav->instance = instance;
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222
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223 instance->pg_resource = resdata;
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224 instance->connection = resdata->data;
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225
374
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226 instance->repository = repo;
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227 snprintf(instance->root_resource_id_str, 32, "%" PRId64, repo->root_resource_id);
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228
303
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229 return webdav;
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230 }
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231
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232 WebdavBackend* pg_webdav_prop_create(Session *sn, Request *rq, pblock *pb) {
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233 return NULL;
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234 }
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235
315
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236 /*
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237 * adds str to the buffer
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238 * some characters will be escaped: \,{}
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239 */
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240 static void buf_addstr_escaped(UcxBuffer *buf, const char *str) {
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241 size_t len = strlen(str);
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242 for(size_t i=0;i<len;i++) {
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243 char c = str[i];
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244 if(c == '{' || c == '}' || c == ',' || c == '\\') {
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245 ucx_buffer_putc(buf, '\\');
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246 }
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247 ucx_buffer_putc(buf, c);
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248 }
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249 }
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250
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251 /*
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252 * convert a property list to two pg array parameter strings
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253 * array format: {elm1,elm2,elm3}
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254 * xmlns: buffer for the xmlns array
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255 * pname: buffer for the property name array
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256 *
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257 * returns 0 on success, 1 otherwise
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258 */
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259 int pg_create_property_param_arrays(WebdavPList *plist, UcxBuffer *xmlns, UcxBuffer *pname) {
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260 ucx_buffer_putc(xmlns, '{');
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261 ucx_buffer_putc(pname, '{');
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262 while(plist) {
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263 WebdavProperty *property = plist->property;
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264 if(property && property->namespace && property->namespace->href && property->name) {
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265 buf_addstr_escaped(xmlns, (const char*)property->namespace->href);
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266 buf_addstr_escaped(pname, (const char*)property->name);
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267 if(plist->next) {
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268 ucx_buffer_putc(xmlns, ',');
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269 ucx_buffer_putc(pname, ',');
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270 }
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271 }
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272 plist = plist->next;
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273 }
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274 int r1 = ucx_buffer_write("}\0", 2, 1, xmlns) == 0;
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275 int r2 = ucx_buffer_write("}\0", 2, 1, pname) == 0;
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276 return r1+r2 != 0;
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277 }
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278
303
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279
375
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280 static int pg_create_propfind_query(WebdavPropfindRequest *rq, WSBool iscollection, UcxBuffer *sql) {
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281 PgWebdavBackend *pgdav = rq->dav->instance;
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282 int depth = !iscollection ? 0 : rq->depth;
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283
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284 /*
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285 * PROPFIND queries are build from components:
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286 *
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287 * cte cte_recursive or empty
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288 * select
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289 * ppath ppath column
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290 * cols list of columns
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291 * ext_cols* list of extension columns
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292 * from from [table] / from cte
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293 * prop_join join with property table, allprop or plist
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294 * ext_join* extension table join
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295 * where different where clauses for depth0 and depth1
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296 * order depth0 doesn't need order
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297 */
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298
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299 // CTE
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300 if(depth == -1) {
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301 ucx_buffer_puts(sql, sql_propfind_cte_recursive);
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302 }
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303
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304 // select
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305 ucx_buffer_puts(sql, sql_propfind_select);
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306
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307 // ppath
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308 switch(depth) {
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309 case 0: ucx_buffer_puts(sql, sql_propfind_ppath_depth0); break;
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310 case 1: ucx_buffer_puts(sql, sql_propfind_ppath_depth1); break;
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311 case -1: ucx_buffer_puts(sql, sql_propfind_ppath_depth_infinity); break;
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312 }
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313
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314 // cols
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315 ucx_buffer_puts(sql, sql_propfind_cols);
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316
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317 // from
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318 ucx_buffer_puts(sql, depth == -1 ? sql_propfind_from_cte : sql_propfind_from_table);
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319
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320 // prop join
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321 ucx_buffer_puts(sql, rq->allprop ? sql_propfind_propjoin_allprop : sql_propfind_propjoin_plist);
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322
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323 // where
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324 if(depth == 0) {
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325 ucx_buffer_puts(sql, sql_propfind_where_depth0);
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326 } else if(depth == 1) {
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327 ucx_buffer_puts(sql, sql_propfind_where_depth1);
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328 }
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329
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330 // order
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331 if(depth == 1) {
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332 ucx_buffer_puts(sql, sql_propfind_order_depth1);
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333 } else if(depth == -1) {
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334 ucx_buffer_puts(sql, sql_propfind_order_depth_infinity);
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335 }
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336
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337 // end
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338 ucx_buffer_puts(sql, ";\0");
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339
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340 //printf("\n\n%s\n\n", sql->space);
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341 //fflush(stdout);
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342
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343 return 0;
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344 }
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345
299
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346 int pg_dav_propfind_init(
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347 WebdavPropfindRequest *rq,
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348 const char *path,
307
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349 const char *href,
299
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350 WebdavPList **outplist)
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351 {
306
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352 PgWebdavBackend *pgdav = rq->dav->instance;
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353
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354 // check if the resource exists
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355 int64_t parent_id;
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356 int64_t resource_id;
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357 const char *resourcename;
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358 WSBool iscollection;
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359 int res_errno = 0;
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360 int err = pg_resolve_path(
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361 pgdav->connection,
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362 path,
374
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363 pgdav->root_resource_id_str,
306
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364 &parent_id,
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365 &resource_id,
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366 NULL, // OID
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367 &resourcename,
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368 &iscollection,
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369 NULL, // stat
346
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370 NULL, // etag
306
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371 &res_errno);
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372
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373 if(err) {
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374 if(res_errno == ENOENT) {
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375 protocol_status(rq->sn, rq->rq, PROTOCOL_NOT_FOUND, NULL);
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376 }
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377 return 1;
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378 }
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379
375
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380 // create sql query
306
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381 const char *query = NULL;
375
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382 UcxBuffer *sql = ucx_buffer_new(NULL, 2048, UCX_BUFFER_AUTOEXTEND);
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383 if(pg_create_propfind_query(rq, iscollection, sql)) {
306
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384 return 1;
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385 }
375
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386 query = sql->space;
306
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387
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388 // get all resources and properties
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389 char resource_id_str[32];
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390 snprintf(resource_id_str, 32, "%" PRId64, resource_id);
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391
307
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392 size_t href_len = strlen(href);
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393 char *href_param = pool_malloc(rq->sn->pool, href_len + 1);
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394 memcpy(href_param, href, href_len);
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395 if(href_param[href_len-1] == '/') {
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396 href_len--;
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397 }
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398 href_param[href_len] = '\0';
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399
315
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400 // if allprop is false, create array pair for xmlns/property names
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401 UcxBuffer *xmlns_buf = NULL;
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402 UcxBuffer *pname_buf = NULL;
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403 char *xmlns_param = NULL;
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404 char *pname_param = NULL;
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405 int nparam = 2;
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406 if(!rq->allprop) {
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407 size_t bufsize = rq->propcount < 200 ? 8 + rq->propcount * 32 : 4096;
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408 xmlns_buf = ucx_buffer_new(NULL, bufsize, UCX_BUFFER_AUTOEXTEND);
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409 if(!xmlns_buf) {
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410 return 1;
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411 }
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412 pname_buf = ucx_buffer_new(NULL, bufsize, UCX_BUFFER_AUTOEXTEND);
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413 if(!pname_buf) {
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414 ucx_buffer_free(xmlns_buf);
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415 return 1;
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416 }
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417 if(pg_create_property_param_arrays(rq->properties, xmlns_buf, pname_buf)) {
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418 ucx_buffer_free(xmlns_buf);
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419 ucx_buffer_free(pname_buf);
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420 return 1;
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421 }
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422 xmlns_param = xmlns_buf->space;
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423 pname_param = pname_buf->space;
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424 nparam = 4;
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425 }
307
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426
315
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427 const char* params[4] = { resource_id_str, href_param, xmlns_param, pname_param };
306
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428 PGresult *result = PQexecParams(
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429 pgdav->connection,
315
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430 query,
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431 nparam, // number of parameters
306
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432 NULL,
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433 params, // parameter value
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434 NULL,
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435 NULL,
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436 0); // 0: result in text format
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437 int nrows = PQntuples(result);
307
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438 pool_free(rq->sn->pool, href_param);
315
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439 if(xmlns_buf) {
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440 ucx_buffer_free(xmlns_buf);
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441 ucx_buffer_free(pname_buf);
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442 }
306
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443 if(nrows < 1) {
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444 PQclear(result);
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445 return 1;
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446 }
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447
300
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448 PgPropfind *pg = pool_malloc(rq->sn->pool, sizeof(PgPropfind));
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449 rq->userdata = pg;
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450
306
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451 pg->path = path;
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452 pg->resource_id = resource_id;
331
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453 pg->vfsproperties = webdav_vfs_properties(outplist, TRUE, rq->allprop, 0);
306
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454 pg->result = result;
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455 pg->nrows = nrows;
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456
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457 return 0;
299
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458 }
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459
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460 int pg_dav_propfind_do(
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461 WebdavPropfindRequest *rq,
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462 WebdavResponse *response,
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463 VFS_DIR parent,
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464 WebdavResource *resource,
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465 struct stat *s)
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466 {
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467 PgPropfind *pg = rq->userdata;
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468 pool_handle_t *pool = rq->sn->pool;
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469 PGresult *result = pg->result;
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470 WebdavVFSProperties vfsprops = pg->vfsproperties;
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471
313
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472 WSBool vfsprops_set = 0; // are live properties added to the response?
306
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473 int64_t current_resource_id = pg->resource_id;
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474 for(int r=0;r<pg->nrows;r++) {
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475 // columns:
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476 // 0: path
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477 // 1: resource_id
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478 // 2: parent_id
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479 // 3: nodename
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480 // 4: iscollection
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481 // 5: lastmodified
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482 // 6: creationdate
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483 // 7: contentlength
348
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484 // 8: etag
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485 // 9: property prefix
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486 // 10: property xmlns
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487 // 11: property name
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488 // 12: property lang
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489 // 13: property nsdeflist
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490 // 14: property value
306
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491
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492 char *path = PQgetvalue(result, r, 0);
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493 char *res_id = PQgetvalue(result, r, 1);
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494 char *iscollection_str = PQgetvalue(result, r, 4);
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495 WSBool iscollection = iscollection_str && iscollection_str[0] == 't';
306
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496 int64_t resource_id;
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497 if(!util_strtoint(res_id, &resource_id)) {
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498 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: cannot convert resource_id '%s' to int", res_id);
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499 return 1;
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500 }
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501
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502 if(resource_id != current_resource_id) {
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503 // create a href string for the new resource
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504 // if the resource is a collection, it should have a trailing '/'
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505 size_t pathlen = strlen(path);
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506 if(pathlen == 0) {
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507 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: query returned invalid path");
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508 return 1;
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509 }
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510 if(pathlen > PG_MAX_PATH_LEN) {
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511 log_ereport(LOG_FAILURE, "pg_dav_propfind_do: path too long: resource_id: %s", res_id);
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512 return 1;
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513 }
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514 char *newres_href = pool_malloc(pool, (pathlen*3)+2);
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515 util_uri_escape(newres_href, path);
307
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516 if(iscollection && path[pathlen-1] != '/') {
356
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517 size_t newres_href_len = strlen(newres_href);
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518 newres_href[newres_href_len] = '/';
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519 newres_href[newres_href_len+1] = '\0';
307
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520 }
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521
306
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522 // new resource
307
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523 resource = response->addresource(response, newres_href);
306
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524 vfsprops_set = FALSE;
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525 current_resource_id = resource_id;
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526 }
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527
313
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528 // standard webdav live properties
306
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529 if(!vfsprops_set) {
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530 if(vfsprops.getresourcetype) {
307
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531 if(iscollection) {
306
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532 resource->addproperty(resource, webdav_resourcetype_collection(), 200);
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533 } else {
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534 resource->addproperty(resource, webdav_resourcetype_empty(), 200);
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535 }
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536 }
348
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537
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538 char *lastmodified = PQgetvalue(result, r, 5);
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539 char *contentlength = PQgetvalue(result, r, 7);
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540 time_t t = pg_convert_timestamp(lastmodified);
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541
306
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542 if(vfsprops.getlastmodified) {
311
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543 struct tm tm;
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544 gmtime_r(&t, &tm);
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545
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546 char buf[HTTP_DATE_LEN+1];
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547 strftime(buf, HTTP_DATE_LEN, HTTP_DATE_FMT, &tm);
314
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548 webdav_resource_add_dav_stringproperty(resource, pool, "getlastmodified", buf, strlen(buf));
306
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549 }
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550 if(vfsprops.creationdate) {
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551 char *creationdate = PQgetvalue(result, r, 6);
311
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552 webdav_resource_add_dav_stringproperty(resource, pool, "creationdate", creationdate, strlen(creationdate));
306
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553 }
314
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554 if(vfsprops.getcontentlength && !iscollection) {
309
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555 webdav_resource_add_dav_stringproperty(resource, pool, "getcontentlength", contentlength, strlen(contentlength));
306
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556 }
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557 if(vfsprops.getetag) {
348
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558 char *etag = PQgetvalue(result, r, 8);
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559 if(!PQgetisnull(result, r, 8)) {
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560 webdav_resource_add_dav_stringproperty(resource, pool, "getetag", etag, strlen(etag));
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561 } else {
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562 int64_t ctlen;
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563 if(util_strtoint(contentlength, &ctlen)) {
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564 char etag[MAX_ETAG];
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565 http_format_etag(rq->sn, rq->rq, etag, MAX_ETAG, ctlen, t);
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566 webdav_resource_add_dav_stringproperty(resource, pool, "getetag", etag, strlen(etag));
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567 }
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568 }
306
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569 }
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diff changeset
570
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571 vfsprops_set = TRUE;
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572 }
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diff changeset
573
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574 // dead properties
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575 if(!PQgetisnull(result, r, 9)) {
348
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576 char *prefix = PQgetvalue(result, r, 9);
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577 char *xmlns = PQgetvalue(result, r, 10);
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578 char *pname = PQgetvalue(result, r, 11);
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579 char *lang = PQgetvalue(result, r, 12);
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580 char *nsdef = PQgetvalue(result, r, 13);
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581 char *pvalue = PQgetvalue(result, r, 14);
317
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582
348
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583 int pvalue_len = PQgetlength(result, r, 14);
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584 WSBool lang_isnull = PQgetisnull(result, r, 12);
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585 WSBool nsdef_isnull = PQgetisnull(result, r, 13);
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586 WSBool pvalue_isnull = PQgetisnull(result, r, 14);
306
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587
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588 WebdavProperty *property = pool_malloc(pool, sizeof(WebdavProperty));
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589 property->lang = NULL;
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590 property->name = pool_strdup(pool, pname);
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591
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592 xmlNs *namespace = pool_malloc(pool, sizeof(xmlNs));
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593 memset(namespace, 0, sizeof(struct _xmlNs));
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594 namespace->href = (xmlChar*)pool_strdup(pool, xmlns);
317
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595 namespace->prefix = (xmlChar*)pool_strdup(pool, prefix);
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596 property->namespace = namespace;
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597
317
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598 if(!lang_isnull) {
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599 property->lang = pool_strdup(pool, lang);
317
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600 }
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601
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602 if(!pvalue_isnull) {
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603 char *content = pool_malloc(pool, pvalue_len+1);
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604 memcpy(content, pvalue, pvalue_len);
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605 content[pvalue_len] = '\0';
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606
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607 if(nsdef_isnull) {
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608 property->vtype = WS_VALUE_TEXT;
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609 property->value.text.str = content;
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610 property->value.text.length = pvalue_len;
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611 } else {
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612 WebdavNSList *nslist = wsxml_string2nslist(pool, nsdef);
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613 property->vtype = WS_VALUE_XML_DATA;
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614 property->value.data->data = content;
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615 property->value.data->length = pvalue_len;
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616 property->value.data->namespaces = nslist;
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617
317
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618 }
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619 }
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620
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621 resource->addproperty(resource, property, 200);
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622 }
313
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623 }
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624
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625 return 0;
299
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626 }
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627
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628 int pg_dav_propfind_finish(WebdavPropfindRequest *rq) {
312
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629 PgPropfind *pg = rq->userdata;
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630 pool_handle_t *pool = rq->sn->pool;
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631 PGresult *result = pg->result;
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632
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633 PQclear(result);
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634
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635 return 0;
299
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636 }
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637
318
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638 enum PgDavProp {
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639 PG_DAV_PROPPATCH_NOT_ALLOWED = 0,
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640 PG_DAV_CREATIONDATE,
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641 PG_DAV_DISPLAYNAME,
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642 PG_DAV_DEADPROP
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643 };
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644 /*
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645 * checks if the property can be manipulated
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646 */
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647 static enum PgDavProp proppatch_check_dav_prop(const char *name) {
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648 if(!strcmp(name, "getlastmodified")) {
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649 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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650 } else if(!strcmp(name, "getcontentlength")) {
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651 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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652 } else if(!strcmp(name, "resourcetype")) {
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653 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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654 } else if(!strcmp(name, "getetag")) {
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655 return PG_DAV_PROPPATCH_NOT_ALLOWED;
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656 } else if(!strcmp(name, "creationdate")) {
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657 return PG_DAV_CREATIONDATE;
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658 } else if(!strcmp(name, "displayname")) {
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659 return PG_DAV_DISPLAYNAME;
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660 }
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661 return PG_DAV_DEADPROP;
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662 }
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663
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664 typedef struct {
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665 WebdavProperty *creationdate;
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666 WebdavProperty *displayname;
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667 int error;
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668 } PgProppatchOpResult;
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669
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670 typedef int(*pg_proppatch_func)(PgWebdavBackend*, WebdavProppatchRequest*, WebdavResource*, WebdavProperty*, void*);
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671
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672 /*
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673 * This function iterates the property list 'plist',
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674 * analyses if any DAV: property is in the list
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675 * and calls opfunc for the each property
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676 *
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677 * If the property list contains the properties creationdate or displayname,
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678 * the pointers to these properties will be stored in the result structure
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679 */
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680 static PgProppatchOpResult pg_proppatch_op(
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681 PgWebdavBackend *pgdav,
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682 WebdavProppatchRequest *request,
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683 WebdavResource *response,
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684 WebdavPList **plist,
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685 enum PgDavProp forbidden_extra,
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686 pg_proppatch_func opfunc,
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687 void *op_userdata)
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688 {
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689 PgProppatchOpResult result;
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690 result.creationdate = NULL;
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691 result.displayname = NULL;
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692 result.error = 0;
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693
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694 WebdavPListIterator i = webdav_plist_iterator(plist);
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695 WebdavPList *cur;
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696 while(webdav_plist_iterator_next(&i, &cur)) {
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697 WebdavProperty *property = cur->property;
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698 WSNamespace *ns = property->namespace;
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699 if(!ns) {
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700 continue; // maybe we should abort
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701 }
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702
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703 // check if the property is a DAV: property that requires special
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704 // handling
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705 // get* properties can't be manipulated
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706 // some properties can't be removed
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707 if(!strcmp((const char*)ns->href, "DAV:")) {
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708 const char *name = property->name;
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709 enum PgDavProp davprop = proppatch_check_dav_prop(name);
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710 if(davprop != PG_DAV_DEADPROP) {
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711 if(davprop == PG_DAV_PROPPATCH_NOT_ALLOWED || davprop == forbidden_extra) {
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712 response->addproperty(response, property, 409);
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713 } else if(davprop == PG_DAV_CREATIONDATE) {
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714 result.creationdate = property;
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715 } else if(davprop == PG_DAV_DISPLAYNAME) {
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716 result.displayname = property;
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717 }
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718 webdav_plist_iterator_remove_current(&i);
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719 continue;
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720 }
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diff changeset
721 }
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diff changeset
722
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723 // call op func (set, remove specific code)
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diff changeset
724 if(opfunc(pgdav, request, response, property, op_userdata)) {
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diff changeset
725 result.error = 1;
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diff changeset
726 break;
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diff changeset
727 }
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diff changeset
728
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diff changeset
729 webdav_plist_iterator_remove_current(&i);
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730 }
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diff changeset
731
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732 return result;
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diff changeset
733 }
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734
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735 static int pg_dav_set_property(
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736 PgWebdavBackend *pgdav,
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737 WebdavProppatchRequest *request,
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738 WebdavResource *response,
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739 WebdavProperty *property,
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740 void *userdata)
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741 {
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742 pool_handle_t *pool = request->sn->pool;
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743 WSNamespace *ns = property->namespace;
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744 char *resource_id_str = userdata;
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745 int ret = 0;
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746
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747 // convert the property value to WSXmlData
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748 // property->vtype == WS_VALUE_XML_NODE should always be true
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749 WSXmlData *property_value = property->vtype == WS_VALUE_XML_NODE ? wsxml_node2data(pool, property->value.node) : NULL;
324
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750 char *value_str = NULL;
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751 char *nsdef_str = NULL;
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752 if(property_value) {
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753 value_str = property_value->data;
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754 if(property_value->namespaces) {
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755 nsdef_str = wsxml_nslist2string(pool, property_value->namespaces);
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756 if(!nsdef_str) {
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757 return 1; // OOM
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758 }
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759 }
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760 }
318
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761
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762 // exec sql
324
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763 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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764 PGresult *result = PQexecParams(
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765 pgdav->connection,
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766 sql_proppatch_set,
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767 7, // number of parameters
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768 NULL,
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diff changeset
769 params, // parameter value
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diff changeset
770 NULL,
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diff changeset
771 NULL,
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diff changeset
772 0); // 0: result in text format
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diff changeset
773
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diff changeset
774 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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775 response->addproperty(response, property, 500);
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776 //printf(PQerrorMessage(pgdav->connection));
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777 //fflush(stdout);
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778 ret = 1;
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779 } else {
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780 response->addproperty(response, property, 200);
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781 }
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782 PQclear(result);
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783 if(value_str) pool_free(pool, value_str);
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784
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785 return ret;
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786 }
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diff changeset
787
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788
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789 static int pg_dav_remove_property(
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790 PgWebdavBackend *pgdav,
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diff changeset
791 WebdavProppatchRequest *request,
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diff changeset
792 WebdavResource *response,
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793 WebdavProperty *property,
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794 void *userdata)
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diff changeset
795 {
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diff changeset
796 pool_handle_t *pool = request->sn->pool;
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diff changeset
797 WSNamespace *ns = property->namespace;
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diff changeset
798 char *resource_id_str = userdata;
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diff changeset
799 int ret = 0;
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800
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diff changeset
801 // exec sql
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diff changeset
802 const char* params[3] = { resource_id_str, (const char*)ns->href, property->name };
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diff changeset
803 PGresult *result = PQexecParams(
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804 pgdav->connection,
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diff changeset
805 sql_proppatch_remove,
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diff changeset
806 3, // number of parameters
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diff changeset
807 NULL,
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diff changeset
808 params, // parameter value
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diff changeset
809 NULL,
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diff changeset
810 NULL,
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diff changeset
811 0); // 0: result in text format
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diff changeset
812
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diff changeset
813 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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diff changeset
814 response->addproperty(response, property, 500);
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diff changeset
815 //printf(PQerrorMessage(pgdav->connection));
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816 //fflush(stdout);
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817 ret = 1;
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818 }
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diff changeset
819 PQclear(result);
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diff changeset
820
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821 return ret;
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diff changeset
822 }
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diff changeset
823
299
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parents:
diff changeset
824 int pg_dav_proppatch_do(
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
825 WebdavProppatchRequest *request,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
826 WebdavResource *response,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
827 VFSFile *file,
f927ef81a12b add empty pg webdav funcs
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
828 WebdavPList **out_set,
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
829 WebdavPList **out_remove)
f927ef81a12b add empty pg webdav funcs
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parents:
diff changeset
830 {
318
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diff changeset
831 PgWebdavBackend *pgdav = request->dav->instance;
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diff changeset
832 pool_handle_t *pool = request->sn->pool;
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diff changeset
833 char *path = pblock_findkeyval(pb_key_path, request->rq->vars);
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diff changeset
834
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diff changeset
835 // check if the resource exists, we also need the resource_id
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diff changeset
836 int64_t parent_id;
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diff changeset
837 int64_t resource_id;
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diff changeset
838 const char *resourcename;
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diff changeset
839 WSBool iscollection;
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diff changeset
840 int res_errno = 0;
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diff changeset
841 int err = pg_resolve_path(
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842 pgdav->connection,
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diff changeset
843 path,
374
77506ec632a4 use configured root node from PgRepository in pg vfs/webdav
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diff changeset
844 pgdav->root_resource_id_str,
318
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845 &parent_id,
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diff changeset
846 &resource_id,
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diff changeset
847 NULL, // OID
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diff changeset
848 &resourcename,
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diff changeset
849 &iscollection,
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diff changeset
850 NULL, // stat
346
784b24381bed extend postgresql vfs to store an etag in the file
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parents: 331
diff changeset
851 NULL, // etag
318
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diff changeset
852 &res_errno);
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diff changeset
853
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diff changeset
854 if(err) {
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855 return 1;
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856 }
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diff changeset
857
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diff changeset
858 // because proppatch must be atomic and we have multiple sql
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diff changeset
859 // queries and other backends that do stuff that could fail
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diff changeset
860 // we need the possibility to reverse all changes
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diff changeset
861 // we use a transaction savepoint for this
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diff changeset
862 PGresult *result = PQexec(pgdav->connection, "savepoint proppatch;");
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diff changeset
863 ExecStatusType execStatus = PQresultStatus(result);
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diff changeset
864 PQclear(result);
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diff changeset
865 if(execStatus != PGRES_COMMAND_OK) {
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866 return 1;
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diff changeset
867 }
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868
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869 char resource_id_str[32];
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870 snprintf(resource_id_str, 32, "%" PRId64, resource_id);
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871
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872 int ret = 0;
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873 PgProppatchOpResult set_res = pg_proppatch_op(
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874 pgdav,
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875 request,
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876 response,
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877 out_set,
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878 PG_DAV_PROPPATCH_NOT_ALLOWED,
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879 pg_dav_set_property,
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880 resource_id_str);
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881 if(set_res.error) {
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882 return 1;
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883 }
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884 PgProppatchOpResult rm_res = pg_proppatch_op(
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885 pgdav,
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886 request,
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887 response,
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888 out_remove,
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889 PG_DAV_CREATIONDATE, // creationdate can't be removed
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890 pg_dav_remove_property,
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891 resource_id_str);
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892 if(rm_res.error) {
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893 return 1;
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894 }
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895
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896 return ret;
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897 }
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898
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899 int pg_dav_proppatch_finish(
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900 WebdavProppatchRequest *request,
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901 WebdavResource *response,
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902 VFSFile *file,
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903 WSBool commit)
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904 {
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905 PgWebdavBackend *pgdav = request->dav->instance;
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906 int ret = 0;
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907 if(!commit) {
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908 PGresult *result = PQexec(pgdav->connection, "rollback to savepoint proppatch;");
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909 if(PQresultStatus(result) != PGRES_COMMAND_OK) {
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910 log_ereport(LOG_FAILURE, "pg_dav_proppatch_finish: rollback failed: %s", PQerrorMessage(pgdav->connection));
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911 ret = 1;
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912 }
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913 PQclear(result);
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914 }
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915 return ret;
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916 }

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