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annotate xml/ru/docs/http/ngx_http_map_module.xml @ 572:17ceffcc7ffb

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Brought the ngx_http_map_module documentation up to date.
author Ruslan Ermilov <ru@nginx.com>
date Thu, 05 Jul 2012 13:15:08 +0000
parents 9913f1d51c07
children be54c443235a
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1 <?xml version="1.0"?>
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2
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3 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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4
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5 <module name="Модуль ngx_http_map_module"
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6 link="/ru/docs/http/ngx_http_map_module.html"
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7 lang="ru">
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8
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9 <section id="summary">
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10
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11 <para>
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12 Модуль <literal>ngx_http_map_module</literal> создаёт переменные,
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13 значения которых зависят от значений других переменных.
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14 </para>
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15
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16 </section>
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17
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18
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19 <section id="example" name="Пример конфигурации">
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20
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21 <para>
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22 <example>
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23 map $http_host $name {
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24 hostnames;
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25
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26 default 0;
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27
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28 example.com 1;
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29 *.example.com 1;
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30 example.org 2;
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31 *.example.org 2;
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32 .example.net 3;
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33 wap.* 4;
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34 }
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35
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36 map $http_user_agent $mobile {
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37 default 0;
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38 "~Opera Mini" 1;
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39 }
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40 </example>
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41 </para>
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42
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43 </section>
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44
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45
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46 <section id="directives" name="Директивы">
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47
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48 <directive name="map">
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49 <syntax block="yes">
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50 <value>строка</value>
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51 <value>$переменная</value></syntax>
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52 <default/>
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53 <context>http</context>
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54
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55 <para>
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56 Создаёт новую переменную, значение которой
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57 зависит от значений одной или более исходных переменных,
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58 указанных в первом параметре.
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59 <note>
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60 До версии 0.9.0 в качестве первого параметра можно было
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61 указать только одну переменную.
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62 </note>
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63 </para>
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64
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65 <para>
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66 Параметры внутри блока <literal>map</literal> задают соответствие
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67 между исходными и результирующими значениями.
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68 </para>
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69
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70 <para>
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71 Исходные значения задаются строками или регулярными выражениями (0.9.6).
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72 </para>
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73
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74 <para>
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75 Перед регулярным выражением ставится символ “<literal>~</literal>”,
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76 если при сравнении следует учитывать регистр символов, либо символы
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77 “<literal>~*</literal>” (1.0.4), если регистр символов учитывать не нужно.
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78 Регулярное выражение может содержать именованные и позиционные выделения,
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79 которые могут затем использоваться в других директивах совместно с
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80 результирующей переменной.
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81 </para>
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82
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83 <para>
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84 Если исходное значение совпадает с именем одного из специальных параметров
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85 (см. ниже), перед ним следует поставить символ “<literal>\</literal>”.
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86 </para>
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87
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88 <para>
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89 В качестве результирующего значения можно указать строку
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90 или другую переменную (0.9.0).
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91 </para>
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92
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93 <para>
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94 Директива также поддерживает три специальных параметра:
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95 <list type="tag">
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96 <tag-name><literal>default</literal> <value>значение</value></tag-name>
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97 <tag-desc>
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98 задаёт результирующее значение, если исходное значение не
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99 совпадает ни с одним из перечисленных.
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100 Если параметр <literal>default</literal> не указан, результирующим значением
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101 по умолчанию будет пустая строка.
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102 </tag-desc>
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103
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104 <tag-name><literal>hostnames</literal></tag-name>
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105 <tag-desc>
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106 указывает, что в качестве исходных значений можно
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107 использовать маску для первой или последней части имени хоста, например,
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108 <example>
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109 *.example.com 1;
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110 example.* 1;
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111 </example>
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112 Вместо двух записей
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113 <example>
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114 example.com 1;
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115 *.example.com 1;
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116 </example>
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117 можно использовать одну:
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118 <example>
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119 .example.com 1;
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120 </example>
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121 Этот параметр следует указывать перед списком значений.
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122 </tag-desc>
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123
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124 <tag-name><literal>include</literal> <value>файл</value></tag-name>
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125 <tag-desc>
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126 включает файл со значениями.
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127 Включений может быть несколько.
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128 </tag-desc>
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129
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130 </list>
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131 </para>
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132
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133 <para>
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134 Если исходному значению соответствует несколько из указанных вариантов,
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135 например, одновременно подходят и маска, и регулярное выражение,
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136 будет выбран первый подходящий вариант в следующем порядке приоритета:
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137 <list type="enum">
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138
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139 <listitem>
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140 строковое значение без маски
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141 </listitem>
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142
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143 <listitem>
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144 самое длинное строковое значение с маской в начале,
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145 например “<literal>*.example.com</literal>”
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146 </listitem>
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147
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148 <listitem>
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149 самое длинное строковое значение с маской в конце,
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150 например “<literal>mail.*</literal>”
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151 </listitem>
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152
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153 <listitem>
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154 первое подходящее регулярное выражение
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155 (в порядке следования в конфигурационном файле)
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156 </listitem>
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157
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158 <listitem>
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159 значение по умолчанию (<literal>default</literal>)
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160 </listitem>
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161
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162 </list>
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163 </para>
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164
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165 </directive>
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166
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167
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168 <directive name="map_hash_bucket_size">
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169 <syntax><value>размер</value></syntax>
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170 <default>32|64|128</default>
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171 <context>http</context>
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172
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173 <para>
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174 Задаёт размер корзины в хэш-таблицах для переменных <link id="map"/>.
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175 Значение по умолчанию зависит от размера строки кэша процессора.
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176 Подробнее смотрите в документе по
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177 <link doc="../hash.xml">настройке хэшей</link>.
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178 </para>
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179
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180 </directive>
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181
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182
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183 <directive name="map_hash_max_size">
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184 <syntax><value>размер</value></syntax>
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185 <default>2048</default>
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186 <context>http</context>
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187
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188 <para>
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189 Задаёт максимальный размер хэш-таблиц для переменных <link id="map"/>.
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190 Подробнее смотрите в документе по
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191 <link doc="../hash.xml">настройке хэшей</link>.
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192 </para>
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193
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194 </directive>
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195
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196 </section>
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197
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198 </module>