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annotate xml/ru/docs/http/ngx_http_log_module.xml @ 580:be54c443235a

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Added copyright markers to documentation sources.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 10 Jul 2012 12:59:42 +0000
parents d00a4f9b1c5d
children 764fbac1b8b4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 <?xml version="1.0"?>
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2
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3 <!--
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4 Copyright (C) Igor Sysoev
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5 Copyright (C) Nginx, Inc.
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6 -->
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7
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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9
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10 <module name="Модуль ngx_http_log_module"
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11 link="/ru/docs/http/ngx_http_log_module.html"
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12 lang="ru">
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13
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14 <section id="summary">
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15
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16 <para>
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17 Модуль <literal>ngx_http_log_module</literal> записывает логи запросов
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18 в указанном формате.
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19 </para>
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20
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21 <para>
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22 Логи записываются в контексте location’а, где заканчивается обработка.
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23 Это может быть location, отличный от первоначального, если в процессе
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24 обработки запроса происходит
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25 <link doc="ngx_http_core_module.xml" id="internal">внутреннее
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26 перенаправление</link>.
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27 </para>
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28
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29 </section>
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30
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31
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32 <section id="example" name="Пример конфигурации">
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33
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34 <para>
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35 <example>
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36 log_format gzip '$remote_addr - $remote_user [$time_local] '
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37 '"$request" $status $bytes_sent '
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38 '"$http_referer" "$http_user_agent" "$gzip_ratio"';
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39
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40 access_log /spool/logs/nginx-access.log gzip buffer=32k;
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41 </example>
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42 </para>
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43
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44 </section>
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45
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46
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47 <section id="directives" name="Директивы">
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48
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49 <directive name="access_log">
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50 <syntax>
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51 <value>путь</value>
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52 [<value>формат</value>
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53 [<literal>buffer</literal>=<value>размер</value>]]</syntax>
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54 <syntax><literal>off</literal></syntax>
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55 <default>logs/access.log combined</default>
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56 <context>http</context>
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57 <context>server</context>
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58 <context>location</context>
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59 <context>if в location</context>
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60 <context>limit_except</context>
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61
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62 <para>
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63 Задаёт путь, формат и размер буфера для буферизованной записи в лог.
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64 На одном уровне может использоваться несколько логов.
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65 Специальное значение <literal>off</literal> отменяет все директивы
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66 <literal>access_log</literal> для текущего уровня.
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67 Если формат не указан, то используется предопределённый формат
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68 “<literal>combined</literal>”.
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69 </para>
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70
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71 <para>
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72 Размер буфера должен быть не больше размера атомарной записи в дисковый файл.
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73 Для FreeBSD 3.0-6.0 этот размер неограничен.
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74 </para>
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75
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76 <para>
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77 В пути файла можно использовать переменные (0.7.6+),
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78 но такие логи имеют некоторые ограничения:
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79 <list type="bullet">
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80
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81 <listitem>
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82 <link doc="../ngx_core_module.xml" id="user">пользователь</link>,
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83 с правами которого работают рабочие процессы, должен
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84 иметь права на создание файлов в каталоге с такими логами;
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85 </listitem>
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86
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87 <listitem>
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88 не работает буферизация;
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89 </listitem>
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90
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91 <listitem>
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92 файл открывается для каждой записи в лог и сразу же после записи закрывается.
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93 Следует однако иметь в виду, что поскольку дескрипторы часто используемых файлов
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94 могут храниться в <link id="open_log_file_cache">кэше</link>,
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95 то при вращении логов в течение времени, заданного параметром
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96 <literal>valid</literal> директивы <link id="open_log_file_cache"/>,
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97 запись может продолжаться в старый файл.
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98 </listitem>
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99
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100 <listitem>
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101 при каждой записи в лог проверяется существование
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102 <link doc="ngx_http_core_module.xml" id="root">корневого каталога</link>
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103 для запроса — если этот каталог не существует, то лог не создаётся.
106
56457a474903 If text of the link is not provided, the @id is used.
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104 Поэтому <link doc="ngx_http_core_module.xml" id="root"/>
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105 и <literal>access_log</literal> нужно описывать на одном уровне:
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106 <example>
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107 server {
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108 root /spool/vhost/data/$host;
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109 access_log /spool/vhost/logs/$host;
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110 ...
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111 </example>
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112 </listitem>
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113
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114 </list>
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115 </para>
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116
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117 </directive>
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118
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119
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120 <directive name="log_format">
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121 <syntax>
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122 <value>название</value>
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123 <value>строка</value> ...</syntax>
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124 <default>combined "..."</default>
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125 <context>http</context>
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126
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127 <para>
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128 Задаёт формат лога.
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129 </para>
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130
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131 <para>
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132 Кроме общих переменных в формате можно использовать переменные,
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133 существующие только на момент записи в лог:
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134 <list type="tag">
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135
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136 <tag-name><var>$body_bytes_sent</var></tag-name>
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137 <tag-desc>
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138 число байт, переданных клиенту, за вычетом заголовка ответа;
271
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139 переменная совместима с параметром “<literal>%B</literal>” модуля Apache
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140 <literal>mod_log_config</literal>
224
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141 </tag-desc>
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142
224
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143 <tag-name><var>$bytes_sent</var></tag-name>
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144 <tag-desc>
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145 число байт, переданных клиенту
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146 </tag-desc>
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147
224
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148 <tag-name><var>$connection</var></tag-name>
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149 <tag-desc>
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150 порядковый номер соединения
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151 </tag-desc>
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152
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153 <tag-name><var>$connection_requests</var></tag-name>
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154 <tag-desc>
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155 текущее число запросов в соединении
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156 </tag-desc>
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157
224
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158 <tag-name><var>$msec</var></tag-name>
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159 <tag-desc>
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160 время в секундах с точностью до миллисекунд на момент записи в лог
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161 </tag-desc>
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162
224
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163 <tag-name><var>$pipe</var></tag-name>
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164 <tag-desc>
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165 “<literal>p</literal>” если запрос был pipelined, иначе “<literal>.</literal>”
224
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166 </tag-desc>
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167
224
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168 <tag-name><var>$request_length</var></tag-name>
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169 <tag-desc>
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170 длина запроса (включая строку запроса, заголовок и тело запроса)
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171 </tag-desc>
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172
224
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173 <tag-name><var>$request_time</var></tag-name>
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174 <tag-desc>
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175 время обработки запроса в секундах с точностью до миллисекунд;
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176 время, прошедшее с момента чтения первых байт от клиента до
451
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177 момента записи в лог после отправки последних байт клиенту
224
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178 </tag-desc>
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179
224
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180 <tag-name><var>$status</var></tag-name>
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181 <tag-desc>
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182 статус ответа
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183 </tag-desc>
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184
224
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185 <tag-name><var>$time_iso8601</var></tag-name>
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186 <tag-desc>
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187 локальное время в формате по стандарту ISO 8601
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188 </tag-desc>
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189
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190 <tag-name><var>$time_local</var></tag-name>
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191 <tag-desc>
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192 локальное время в Common Log Format
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193 </tag-desc>
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194
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195 </list>
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196 </para>
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197
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198 <para>
224
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199 Строки заголовка, переданные клиенту, начинаются с префикса
271
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200 “<literal>sent_http_</literal>”, например,
224
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201 <var>$sent_http_content_range</var>.
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202 </para>
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203
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204 <para>
224
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205 В конфигурации всегда существует предопределённый формат
271
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206 “<literal>combined</literal>”:
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207 <example>
351
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208 log_format combined '$remote_addr - $remote_user [$time_local] '
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209 '"$request" $status $body_bytes_sent '
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210 '"$http_referer" "$http_user_agent"';
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211 </example>
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212 </para>
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213
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214 </directive>
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215
364
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216
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217 <directive name="open_log_file_cache">
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218
224
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219 <syntax>
271
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220 <literal>max</literal>=<value>N</value>
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221 [<literal>inactive</literal>=<value>время</value>]
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222 [<literal>min_uses</literal>=<value>N</value>]
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223 [<literal>valid</literal>=<value>время</value>]</syntax>
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224 <syntax><literal>off</literal></syntax>
102
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225 <default>off</default>
224
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226 <context>http</context>
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227 <context>server</context>
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228 <context>location</context>
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229
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230 <para>
224
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231 Задаёт кэш, в котором хранятся дескрипторы файлов часто используемых
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232 логов, имена которых заданы с использованием переменных.
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233 Параметры директивы:
224
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234 <list type="tag">
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235
271
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236 <tag-name><literal>max</literal></tag-name>
224
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237 <tag-desc>
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238 задаёт максимальное число дескрипторов в кэше;
507
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239 при переполнении кэша наименее востребованные (LRU)
224
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240 дескрипторы закрываются
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241 </tag-desc>
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242
271
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243 <tag-name><literal>inactive</literal></tag-name>
224
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244 <tag-desc>
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245 задаёт время, после которого закэшированный дескриптор закрывается,
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246 если к нему не было обращений в течение этого времени;
224
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247 по умолчанию 10 секунд
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248 </tag-desc>
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249
271
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250 <tag-name><literal>min_uses</literal></tag-name>
224
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251 <tag-desc>
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252 задаёт минимальное число использований файла в течение
271
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253 времени, заданного параметром <literal>inactive</literal>,
224
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254 после которого дескриптор файла будет оставаться открытым в кэше;
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255 по умолчанию 1
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256 </tag-desc>
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257
271
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258 <tag-name><literal>valid</literal></tag-name>
224
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259 <tag-desc>
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260 задаёт, через какое время нужно проверять, что файл ещё
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261 существует под тем же именем;
224
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262 по умолчанию 60 секунд
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263 </tag-desc>
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264
271
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265 <tag-name><literal>off</literal></tag-name>
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266 <tag-desc>
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267 запрещает кэш
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268 </tag-desc>
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269
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270 </list>
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271 </para>
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272
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273 <para>
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274 Пример использования:
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275 <example>
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276 open_log_file_cache max=1000 inactive=20s valid=1m min_uses=2;
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277 </example>
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278 </para>
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279
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280 </directive>
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281
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282 </section>
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283
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284 </module>