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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 2014 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 | #include <string.h> |
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32 | |
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33 | #include "db.h" |
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34 | |
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35 | #include <libidav/utils.h> |
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36 | |
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37 | #include <libxml/encoding.h> |
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38 | #include <libxml/xmlwriter.h> |
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39 | |
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40 | |
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41 | #define xstreq(a,b) xmlStrEqual(BAD_CAST a, BAD_CAST b) |
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42 | |
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43 | #ifdef _WIN32 |
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44 | #define ENV_HOME getenv("USERPROFILE") |
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45 | #else |
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46 | #define ENV_HOME getenv("HOME") |
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47 | #endif /* _WIN32 */ |
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48 | |
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49 | UcxMap* load_db(char *name) { |
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50 | char *dav_dir = util_concat_path(ENV_HOME, ".dav"); |
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51 | char *db_file = util_concat_path(dav_dir, name); |
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52 | free(dav_dir); |
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53 | |
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54 | xmlTextReaderPtr reader = xmlReaderForFile(db_file, NULL, 0); |
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55 | if(!reader) { |
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56 | xmlDoc *doc = doc = xmlNewDoc(BAD_CAST "1.0"); |
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57 | xmlNode *root = xmlNewNode(NULL, BAD_CAST "directory"); |
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58 | xmlDocSetRootElement(doc, root); |
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59 | UcxMap *db = NULL; |
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60 | if(xmlSaveFormatFileEnc(db_file, doc, "UTF-8", 1) != -1) { |
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61 | db = ucx_map_new(2048); |
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62 | } |
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63 | xmlFreeDoc(doc); |
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64 | free(db_file); |
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65 | return db; |
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66 | } |
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67 | free(db_file); |
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68 | |
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69 | UcxMap *map = ucx_map_new(2048); |
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70 | int error = 0; |
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71 | while(xmlTextReaderRead(reader)) { |
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72 | int type = xmlTextReaderNodeType(reader); |
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73 | const xmlChar *name = xmlTextReaderConstName(reader); |
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74 | |
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75 | if(type == XML_READER_TYPE_ELEMENT) { |
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76 | if(xstreq(name, "resource")) { |
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77 | LocalResource *res = process_resource(reader); |
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78 | if(res) { |
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79 | ucx_map_cstr_put(map, res->path, res); |
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80 | } else { |
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81 | error = 1; |
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82 | break; |
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83 | } |
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84 | } |
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85 | } |
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86 | } |
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87 | |
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88 | xmlFreeTextReader(reader); |
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89 | if(error) { |
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90 | // TODO: free resources and map |
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91 | return NULL; |
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92 | } else { |
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93 | return map; |
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94 | } |
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95 | } |
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96 | |
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97 | LocalResource* process_resource(xmlTextReaderPtr reader) { |
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98 | LocalResource *res = calloc(1, sizeof(LocalResource)); |
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99 | |
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100 | int field = -1; |
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101 | while(xmlTextReaderRead(reader)) { |
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102 | int type = xmlTextReaderNodeType(reader); |
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103 | const xmlChar *name = xmlTextReaderConstName(reader); |
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104 | |
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105 | if(type == XML_READER_TYPE_ELEMENT) { |
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106 | if(xstreq(name, "path")) { |
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107 | field = 0; |
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108 | } else if(xstreq(name, "etag")) { |
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109 | field = 1; |
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110 | } else if(xstreq(name, "lastmodified")) { |
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111 | field = 2; |
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112 | } else if(xstreq(name, "size")) { |
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113 | field = 3; |
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114 | } |
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115 | } else if(type == XML_READER_TYPE_TEXT) { |
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116 | const xmlChar *value = xmlTextReaderConstValue(reader); |
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117 | int b = 0; |
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118 | switch(field) { |
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119 | case 0: { |
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120 | res->path = strdup((char*)value); |
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121 | break; |
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122 | } |
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123 | case 1: { |
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124 | res->etag = strdup((char*)value); |
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125 | break; |
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126 | } |
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127 | case 2: { |
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128 | //res->last_modified = util_parse_lastmodified((char*)value); |
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129 | //res->last_modified = atoi((char*)value); |
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130 | char *endptr = (char*)value; |
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131 | time_t t = strtoll((char*)value, &endptr, 10); |
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132 | if(endptr == (char*)value) { |
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133 | fprintf( |
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134 | stderr, |
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135 | "lastmodified contains not a number: %s\n", value); |
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136 | } else { |
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137 | res->last_modified = t; |
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138 | } |
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139 | break; |
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140 | } |
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141 | case 3: { |
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142 | res->size = atoi((char*)value); |
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143 | break; |
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144 | } |
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145 | } |
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146 | } else if(XML_READER_TYPE_END_ELEMENT) { |
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147 | if(xstreq(name, "resource")) { |
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148 | break; |
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149 | } else { |
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150 | field = -1; |
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151 | } |
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152 | } |
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153 | } |
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154 | |
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155 | if(!res->path || res->last_modified == 0) { |
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156 | // TODO: free res |
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157 | return NULL; |
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158 | } else { |
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159 | return res; |
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160 | } |
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161 | } |
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162 | |
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163 | int store_db(UcxMap *db, char *name) { |
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164 | // open writer |
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165 | char *dav_dir = util_concat_path(ENV_HOME, ".dav"); |
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166 | char *db_file = util_concat_path(dav_dir, name); |
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167 | free(dav_dir); |
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168 | xmlTextWriterPtr writer = xmlNewTextWriterFilename(db_file, 0); |
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169 | if(!writer) { |
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170 | fprintf(stderr, "Cannot write db file: %s\n", db_file); |
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171 | free(db_file); |
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172 | return -1; |
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173 | } |
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174 | free(db_file); |
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175 | |
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176 | // start document |
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177 | int r = 0; |
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178 | r = xmlTextWriterStartDocument(writer, NULL, "UTF-8", NULL); |
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179 | if(r < 0) { |
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180 | xmlFreeTextWriter(writer); |
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181 | return -1; |
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182 | } |
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183 | xmlTextWriterStartElement(writer, BAD_CAST "directory"); |
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184 | |
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185 | // write all resource entries |
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186 | UcxMapIterator i = ucx_map_iterator(db); |
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187 | LocalResource *res; |
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188 | UCX_MAP_FOREACH(key, res, i) { |
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189 | // <resource> |
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190 | xmlTextWriterStartElement(writer, BAD_CAST "resource"); |
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191 | |
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192 | r = xmlTextWriterWriteElement( |
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193 | writer, |
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194 | BAD_CAST "path", |
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195 | BAD_CAST res->path); |
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196 | if(r < 0) { |
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197 | fprintf(stderr, "Cannot write path: %s\n", res->path); |
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198 | xmlFreeTextWriter(writer); |
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199 | return -1; |
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200 | } |
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201 | |
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202 | if(res->etag) { |
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203 | r = xmlTextWriterWriteElement( |
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204 | writer, |
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205 | BAD_CAST "etag", |
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206 | BAD_CAST res->etag); |
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207 | if(r < 0) { |
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208 | fprintf(stderr, "Cannot write etag: %s\n", res->etag); |
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209 | xmlFreeTextWriter(writer); |
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210 | return -1; |
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211 | } |
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212 | } |
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213 | |
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214 | r = xmlTextWriterWriteFormatElement( |
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215 | writer, |
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216 | BAD_CAST "lastmodified", |
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217 | "%" PRId64, |
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218 | (int64_t)res->last_modified); |
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219 | if(r < 0) { |
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220 | fprintf(stderr, "Cannot write lastmodified\n"); |
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221 | xmlFreeTextWriter(writer); |
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222 | return -1; |
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223 | } |
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224 | |
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225 | r = xmlTextWriterWriteFormatElement( |
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226 | writer, |
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227 | BAD_CAST "size", |
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228 | "%" PRId64, |
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229 | (int64_t)res->size); |
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230 | if(r < 0) { |
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231 | fprintf(stderr, "Cannot write size\n"); |
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232 | xmlFreeTextWriter(writer); |
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233 | return -1; |
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234 | } |
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235 | |
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236 | // </resource> |
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237 | xmlTextWriterEndElement(writer); |
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238 | } |
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239 | |
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240 | // end |
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241 | xmlTextWriterEndElement(writer); |
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242 | r = xmlTextWriterEndDocument(writer); |
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243 | if(r < 0) { |
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244 | xmlFreeTextWriter(writer); |
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245 | return -1; |
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246 | } |
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247 | xmlFreeTextWriter(writer); |
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248 | return 0; |
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249 | } |