libidav/xml.c

Fri, 01 Jun 2018 09:23:51 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Fri, 01 Jun 2018 09:23:51 +0200
changeset 402
babdf40dd22c
parent 373
dcc03142eb5f
child 404
5c08b8e14df8
permissions
-rw-r--r--

dav-sync pull applies config tag filter now

also changes, that include/exclude filters never lead to file deletion

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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 2017 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
9ca1e4706acc adds initial support for xml properties in libidav
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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
9ca1e4706acc adds initial support for xml properties in libidav
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10 * notice, this list of conditions and the following disclaimer.
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11 *
9ca1e4706acc adds initial support for xml properties in libidav
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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 #include <string.h>
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32
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33 #include <ucx/utils.h>
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34
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35 #include "xml.h"
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36
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37 static DavXmlNodeType convert_type(xmlElementType type) {
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38 DavXmlNodeType ct;
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39 switch(type) {
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40 default: ct = DAV_XML_NONE; break;
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41 case XML_ELEMENT_NODE: ct = DAV_XML_ELEMENT; break;
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42 case XML_TEXT_NODE: ct = DAV_XML_TEXT;
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43 }
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44 return ct;
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45 }
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46
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47 typedef struct {
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48 xmlNode *node;
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49 DavXmlNode *parent;
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50 } ConvXmlElm;
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51
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52 DavXmlNode* dav_convert_xml(DavSession *sn, xmlNode *node) {
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53 if(!node) {
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54 return NULL;
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55 }
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56 DavXmlNodeType newnt = convert_type(node->type);
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57 if(newnt == DAV_XML_NONE) {
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58 return NULL;
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59 }
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60
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61 UcxMempool *mp = sn->mp;
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62
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63 ConvXmlElm *ce = malloc(sizeof(ConvXmlElm));
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64 ce->node = node;
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65 ce->parent = NULL;
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66 UcxList *stack = ucx_list_prepend(NULL, ce);
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67
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68 DavXmlNode *ret = NULL;
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69
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70 while(stack) {
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71 ConvXmlElm *c = stack->data;
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72 stack = ucx_list_remove(stack, stack);
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73
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74 xmlNode *n = c->node;
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75 DavXmlNode *prev = NULL;
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76 while(n) {
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77 DavXmlNode *newxn = ucx_mempool_calloc(mp, 1, sizeof(DavXmlNode));
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78 if(!ret) {
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79 ret = newxn;
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80 }
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81 newxn->type = convert_type(n->type);
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82 newxn->parent = c->parent;
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83 if(c->parent && !c->parent->children) {
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84 c->parent->children = newxn;
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85 }
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86 newxn->prev = prev;
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87 if(prev) {
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88 prev->next = newxn;
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89 }
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90
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91 if(newxn->type == DAV_XML_ELEMENT) {
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92 newxn->name = dav_session_strdup(sn, (char*)n->name);
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93 if(n->ns && n->ns->href) {
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94 newxn->namespace = dav_session_strdup(sn, (char*)n->ns->href);
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95 }
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96
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97 // TODO: copy attributes
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98
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99 if(n->children) {
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100 ConvXmlElm *convc = malloc(sizeof(ConvXmlElm));
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101 convc->node = n->children;
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102 convc->parent = newxn;
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103 stack = ucx_list_prepend(stack, convc);
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104 }
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105 } else if(newxn->type == DAV_XML_TEXT) {
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106 sstr_t content = sstrdup_a(mp->allocator, sstr((char*)n->content));
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107 newxn->content = content.ptr;
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108 newxn->contentlength = content.length;
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109 }
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110
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111 prev = newxn;
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112 n = n->next;
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113 }
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114
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115 free(c);
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116 }
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117
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118 return ret;
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119 }
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120
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121 void dav_print_xml(DavXmlNode *node) {
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122 if(node->type == DAV_XML_ELEMENT) {
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123 printf("<%s>", node->name);
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124
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125 DavXmlNode *child = node->children;
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126 if(child) {
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127 dav_print_xml(child);
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128 }
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129
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130 printf("</%s>", node->name);
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131 } else {
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132 fwrite(node->content, 1, node->contentlength, stdout);
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133 fflush(stdout);
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134 }
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135 if(node->next) {
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136 dav_print_xml(node->next);
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137 }
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138 }
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139
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140 void dav_print_node(void *stream, write_func writef, UcxMap *nsmap, DavXmlNode *node) {
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141 while(node) {
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142 if(node->type == DAV_XML_ELEMENT) {
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143 char *tagend = node->children ? ">" : " />";
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144 char *prefix = NULL;
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145 if(node->namespace) {
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146 prefix = ucx_map_cstr_get(nsmap, node->namespace);
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147 if(!prefix) {
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148 sstr_t newpre = ucx_sprintf("x%d", (int)nsmap->count);
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149 ucx_map_cstr_put(nsmap, node->namespace, newpre.ptr);
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150 prefix = newpre.ptr;
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151 ucx_fprintf(
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152 stream,
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153 writef,
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154 "<%s:%s xmlns:%s=\"%s\"%s",
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155 prefix,
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156 node->name,
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157 prefix,
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158 node->namespace,
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159 tagend);
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160 } else {
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161 ucx_fprintf(stream, writef, "<%s:%s%s", prefix, node->name, tagend);
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162 }
361
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163 } else {
371
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164 ucx_fprintf(stream, writef, "<%s%s", node->name, tagend);
361
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165 }
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166
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167 if(node->children) {
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168 dav_print_node(stream, writef, nsmap, node->children);
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169 if(prefix) {
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170 ucx_fprintf(stream, writef, "</%s:%s>", prefix, node->name);
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171 } else {
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172 ucx_fprintf(stream, writef, "</%s>", node->name);
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173 }
361
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174 }
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175 } else if(node->type == DAV_XML_TEXT) {
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176 writef(node->content, 1, node->contentlength, stream);
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177 }
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178
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179 node = node->next;
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180 }
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diff changeset
181 }
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182
331
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183 /* ------------------------- public API ------------------------- */
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184
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185 char* dav_xml_getstring(DavXmlNode *node) {
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186 if(node && node->type == DAV_XML_TEXT) {
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187 return node->content;
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188 } else {
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189 return NULL;
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190 }
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191 }
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192
338
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193 DavBool dav_xml_isstring(DavXmlNode *node) {
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194 if(node && node->type == DAV_XML_TEXT && !node->next) {
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195 return TRUE;
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196 } else {
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197 return FALSE;
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198 }
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199 }
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200
373
dcc03142eb5f dav info prints simplified xml values
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201 DavXmlNode* dav_xml_nextelm(DavXmlNode *node) {
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202 node = node->next;
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203 while(node) {
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204 if(node->type == DAV_XML_ELEMENT) {
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205 return node;
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206 }
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207 node = node->next;
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208 }
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209 return NULL;
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210 }
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211
331
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212 DavXmlNode* dav_text_node(DavSession *sn, char *text) {
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213 UcxMempool *mp = sn->mp;
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214 DavXmlNode *newxn = ucx_mempool_calloc(mp, 1, sizeof(DavXmlNode));
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215 newxn->type = DAV_XML_TEXT;
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216 sstr_t content = sstrdup_a(mp->allocator, sstr(text));
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217 newxn->content = content.ptr;
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218 newxn->contentlength = content.length;
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219 return newxn;
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220 }
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221
361
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diff changeset
222
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diff changeset
223
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diff changeset
224
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diff changeset
225 DavXmlNode* dav_copy_node(DavXmlNode *node) {
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diff changeset
226 DavXmlNode *ret = NULL;
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diff changeset
227 DavXmlNode *prev = NULL;
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228 while(node) {
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229 DavXmlNode *copy = calloc(1, sizeof(DavXmlNode));
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diff changeset
230 copy->type = node->type;
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diff changeset
231 if(node->type == DAV_XML_ELEMENT) {
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diff changeset
232 copy->namespace = strdup(node->namespace);
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diff changeset
233 copy->name = strdup(node->name);
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diff changeset
234 copy->children = dav_copy_node(node->children);
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diff changeset
235 } else {
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diff changeset
236 copy->contentlength = node->contentlength;
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diff changeset
237 copy->content = malloc(node->contentlength+1);
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diff changeset
238 memcpy(copy->content, node->content, node->contentlength);
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diff changeset
239 copy->content[copy->contentlength] = 0;
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diff changeset
240 }
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diff changeset
241 if(!ret) {
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242 ret = copy;
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diff changeset
243 }
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diff changeset
244 if(prev) {
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diff changeset
245 prev->next = copy;
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246 copy->prev = prev;
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247 }
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diff changeset
248 prev = copy;
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249 node = node->next;
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250 }
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diff changeset
251 return ret;
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diff changeset
252 }
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253
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254
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diff changeset
255 DavXmlNode* dav_xml_createnode(const char *ns, const char *name) {
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256 DavXmlNode *node = calloc(1, sizeof(DavXmlNode));
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257 node->type = DAV_XML_ELEMENT;
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diff changeset
258 node->namespace = strdup(ns);
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diff changeset
259 node->name = strdup(name);
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260 return node;
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diff changeset
261 }
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diff changeset
262
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diff changeset
263 DavXmlNode* dav_xml_createnode_with_text(const char *ns, const char *name, const char *text) {
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diff changeset
264 DavXmlNode *node = calloc(1, sizeof(DavXmlNode));
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diff changeset
265 node->type = DAV_XML_ELEMENT;
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diff changeset
266 node->namespace = strdup(ns);
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diff changeset
267 node->name = strdup(name);
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diff changeset
268
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diff changeset
269 DavXmlNode *textnode = dav_xml_createtextnode(text);
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diff changeset
270 node->children = textnode;
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diff changeset
271
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diff changeset
272 return node;
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diff changeset
273 }
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diff changeset
274
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diff changeset
275 DavXmlNode* dav_xml_createtextnode(const char *text) {
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diff changeset
276 DavXmlNode *node = calloc(1, sizeof(DavXmlNode));
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diff changeset
277 node->type = DAV_XML_TEXT;
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diff changeset
278 sstr_t content = sstrdup(sstr((char*)text));
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diff changeset
279 node->content = content.ptr;
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diff changeset
280 node->contentlength = content.length;
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diff changeset
281 return node;
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diff changeset
282 }
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diff changeset
283
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diff changeset
284 void dav_xml_add_child(DavXmlNode *node, DavXmlNode *child) {
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diff changeset
285 DavXmlNode *last_child = NULL;
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diff changeset
286 DavXmlNode *c = node->children;
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diff changeset
287 while(c) {
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diff changeset
288 last_child = c;
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diff changeset
289 c = c->next;
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diff changeset
290 }
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291 if(last_child) {
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292 last_child->next = child;
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293 child->prev = last_child;
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294 } else {
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295 node->children = child;
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296 }
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297 }
371
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298
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299 DavXmlNode* dav_parse_xml(DavSession *sn, const char *str, size_t len) {
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300 xmlDoc *doc = xmlReadMemory(str, len, NULL, NULL, 0);
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301 if(!doc) {
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302 return NULL;
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303 }
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304 xmlNode *xml_root = xmlDocGetRootElement(doc);
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305 if(!xml_root) {
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306 xmlFreeDoc(doc);
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307 return NULL;
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308 }
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309 DavXmlNode *x = dav_convert_xml(sn, xml_root);
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310 xmlFreeDoc(doc);
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311 return x;
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312 }

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