src/server/webdav/multistatus.c

Tue, 14 Jan 2020 22:05:34 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 14 Jan 2020 22:05:34 +0100
branch
webdav
changeset 223
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parent 222
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child 226
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permissions
-rw-r--r--

add xml tree iterator

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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 2019 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 <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "../daemon/session.h"
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33
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34 #include "operation.h"
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35
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36 #include "multistatus.h"
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37
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38 #define MULTISTATUS_BUFFER_LENGTH 2048
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39
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40 Multistatus* multistatus_response(Session *sn, Request *rq) {
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41 Multistatus *ms = pool_malloc(sn->pool, sizeof(Multistatus));
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42 if(!ms) {
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43 return NULL;
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44 }
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45 ZERO(ms, sizeof(Multistatus));
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46 ms->response.addresource = multistatus_addresource;
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47 ms->sn = sn;
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48 ms->rq = rq;
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49 ms->namespaces = ucx_map_new_a(session_get_allocator(ms->sn), 8);
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50 if(!ms->namespaces) {
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51 return NULL;
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52 }
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53 if(ucx_map_cstr_put(ms->namespaces, "D", "DAV:")) {
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54 return NULL;
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55 }
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56 return ms;
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57 }
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58
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59 int multistatus_send(Multistatus *ms, SYS_NETFD net) {
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60 char buffer[MULTISTATUS_BUFFER_LENGTH];
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61 Writer writer;
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62 Writer *out = &writer;
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63 writer_init(out, net, buffer, MULTISTATUS_BUFFER_LENGTH);
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64
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65
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66 }
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67
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68 WebdavResource * multistatus_addresource(
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69 WebdavResponse *response,
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70 const char *path)
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71 {
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72 Multistatus *ms = (Multistatus*)response;
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73 MSResponse *res = pool_malloc(ms->sn->pool, sizeof(MSResponse));
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74 if(!res) {
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75 return NULL;
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76 }
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77 ZERO(res, sizeof(MSResponse));
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78
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79 // set href
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80 res->resource.href = pool_strdup(ms->sn->pool, path);
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81
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82 // add resource funcs
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83 res->resource.addproperty = msresponse_addproperty;
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84 res->resource.close = msresponse_close;
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85
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86 res->multistatus = ms;
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87 res->errors = NULL;
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88 res->resource.isclosed = 0;
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89 res->closing = 0;
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90
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91 // add new resource to the resource list
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92 if(ms->current) {
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93 // before adding a new resource, the current resource must be closed
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94 if(!ms->current->resource.isclosed) {
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95 msresponse_close((WebdavResource*)ms->current);
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96 }
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97 ms->current->next = res;
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98 } else {
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99 ms->first = res;
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100 }
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101 ms->current = res;
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102
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103 return (WebdavResource*)res;
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104 }
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105
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106 int msresponse_addproperty(
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107 WebdavResource *res,
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108 WebdavProperty *property,
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109 int status)
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110 {
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111 MSResponse *response = (MSResponse*)res;
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112 if(response->resource.isclosed) {
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113 log_ereport(
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114 LOG_WARN,
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115 "%s",
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116 "webdav: cannot add property to closed response tag");
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117 return 0;
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118 }
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119
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120 // some WebdavProperty checks to make sure nothing explodes
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121 if(!property->namespace || !property->namespace->href) {
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122 // error: namespace is required
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123 log_ereport(
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124 LOG_FAILURE,
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125 "%s",
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126 "webdav: property '%s' has no namespace",
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127 property->name);
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128 return 1;
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129 }
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130 if(property->nsdef) {
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131 // error: nsdef MUST be NULL, only fill nsdef in this func
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132 log_ereport(
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133 LOG_FAILURE,
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134 "%s",
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135 "webdav: property '%s': nsdef must be null",
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136 property->name);
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137 return 1;
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138 }
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139
211
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140 // add namespace of this property to the namespace map
222
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141 // the namespace map will be used for global namespace definitions
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142 if(property->namespace->prefix) {
211
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143 char *ns = ucx_map_cstr_get(
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144 response->multistatus->namespaces,
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145 (const char*)property->namespace->prefix);
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146 if(!ns) {
222
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147 // prefix is not in use -> we can add the namespace to the ns map
211
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148 int err = ucx_map_cstr_put(
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149 response->multistatus->namespaces,
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150 (const char*)property->namespace->prefix,
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151 property->namespace->href);
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152 if(err) {
222
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153 return 1; // OOM
211
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154 }
222
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155 } else if(strcmp((char*)property->namespace->href, ns)) {
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156 // global namespace != local namespace
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157 // therefore we need a namespace definition in this element
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158
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159 if(webdav_property_add_nsdef(
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160 property,
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161 response->multistatus->sn->pool,
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162 (const char*)property->namespace->prefix,
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163 (const char*)property->namespace->href))
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164 {
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165 return 1; // OOM
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166 }
211
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167 }
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168 }
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169
222
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170 // error properties will be added to a separate list
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171 if(status != 200) {
211
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172 return msresponse_addproperror(response, property, status);
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173 }
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174
222
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175 // add all namespaces used by this property to the nsdef list
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176 if(property->vtype == WS_VALUE_XML_NODE) {
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177 // iterate over xml tree and collect all namespaces
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178
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179 // TODO: implement
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180 } else if(property->vtype == WS_VALUE_XML_DATA) {
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181 // xml data contains a list of all used namespaces
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182 WebdavNSList *nslist = property->value.data->namespaces;
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183 while(nslist) {
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184 // only add the namespace to the definitions list, if it isn't
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185 // property namespace, because the prop ns is already added
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186 // to the element's def list or global definitions list
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187 if(strcmp(
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188 (const char*)nslist->namespace->prefix,
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189 (const char*)property->namespace->prefix))
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190 {
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191 // ns-prefix != property-prefix -> add ns to nsdef
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192 if(webdav_property_add_nsdef(
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193 property,
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194 response->multistatus->sn->pool,
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195 (const char*)nslist->namespace->prefix,
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196 (const char*)nslist->namespace->href))
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197 {
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198 return 1; // OOM
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199 }
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200 }
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201 nslist = nslist->next;
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202 }
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203 } // other value types don't contain xml namespaces
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204
211
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205 // add property to the list
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206 WebdavPList *listelm = pool_malloc(
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207 response->multistatus->sn->pool,
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208 sizeof(WebdavPList));
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209 if(!listelm) {
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210 return 1;
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211 }
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212
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213 listelm->property = property;
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214 listelm->next = NULL;
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215
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216 if(response->plist_end) {
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217 response->plist_end->next = listelm;
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218 } else {
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219 response->plist_begin = listelm;
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220 }
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221 response->plist_end = listelm;
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222 return 0;
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223 }
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224
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225 int msresponse_addproperror(
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226 MSResponse *response,
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227 WebdavProperty *property,
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228 int statuscode)
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229 {
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230 pool_handle_t *pool = response->multistatus->sn->pool;
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231 UcxAllocator *a = session_get_allocator(response->multistatus->sn);
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232
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233 // MSResponse contains a list of properties for each status code
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234 // at first find the list for this status code
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235 PropertyErrorList *errlist = NULL;
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236 PropertyErrorList *list = response->errors;
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237 PropertyErrorList *last = NULL;
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238 while(list) {
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239 if(list->status == statuscode) {
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240 errlist = list;
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241 break;
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242 }
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243 last = list;
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244 list = list->next;
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245 }
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246
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247 if(!errlist) {
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248 // no list available for this statuscode
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249 PropertyErrorList *newelm = pool_malloc(pool,
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250 sizeof(PropertyErrorList));
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251 if(!newelm) {
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252 return 1;
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253 }
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254 newelm->begin = NULL;
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255 newelm->end = NULL;
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256 newelm->next = NULL;
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257 newelm->status = statuscode;
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258
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259 if(last) {
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260 last->next = newelm;
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261 } else {
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262 response->errors = newelm;
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263 }
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264 errlist = newelm;
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265 }
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266
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267 // we have the list -> add the new element
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268 UcxList *newlistelm = ucx_list_append_a(a, errlist->end, property);
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269 if(!newlistelm) {
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270 return 1;
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271 }
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272 errlist->end = newlistelm;
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273 if(!errlist->begin) {
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274 errlist->begin = newlistelm;
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275 }
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276 return 0;
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277 }
217
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278
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279 int msresponse_close(WebdavResource *res) {
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280 MSResponse *response = (MSResponse*)res;
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281 if(response->closing) {
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282 return 0; // close already in progress
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283 }
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284
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285 int ret = REQ_PROCEED;
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286 WebdavOperation *op = response->multistatus->response.op;
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287 if(webdav_op_propfiond_close_resource(op, res)) {
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288 ret = REQ_ABORTED;
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289 }
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290
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291 response->resource.isclosed = TRUE;
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292 response->closing = FALSE;
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293 return ret;
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294 }

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